Preallocate slices of known length

* Replace fmt.Sprintf("%d", i)) by strconv.Itoa(i)
* Correct misspelled words * Remove unused code * Break up very long lines into multiple lines * lp.NewMessage -> lp.NewMetric
2026-02-13 14:41:45 +01:00 · 2026-02-12 15:07:39 +01:00 · 2026-02-12 14:31:01 +01:00 · 2026-02-11 15:59:01 +01:00 · 2026-02-11 15:55:14 +01:00 · 2026-02-11 14:56:21 +01:00
53 changed files with 1678 additions and 1502 deletions
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -36,22 +36,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.noarch.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo appstream install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -78,13 +70,13 @@ jobs:

    # See: https://github.com/actions/upload-artifact
    - name: Save RPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector RPM for AlmaLinux 8
        path: ${{ steps.rpmrename.outputs.RPM }}
        overwrite: true
    - name: Save SRPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector SRPM for AlmaLinux 8
        path: ${{ steps.rpmrename.outputs.SRPM }}
@@ -114,23 +106,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.el9_6.noarch.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-race-1.23.9-1.el9_6.x86_64.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo appstream install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -157,25 +140,26 @@ jobs:

    # See: https://github.com/actions/upload-artifact
    - name: Save RPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector RPM for AlmaLinux 9
        path: ${{ steps.rpmrename.outputs.RPM }}
        overwrite: true
    - name: Save SRPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector SRPM for AlmaLinux 9
        path: ${{ steps.rpmrename.outputs.SRPM }}
        overwrite: true

  #
-  # Build on UBI 8 using go-toolset
+  # Build on Red Hat Universal Base Image (UBI 8) using go-toolset
  #
  UBI-8-RPM-build:
    runs-on: ubuntu-latest
-    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c35984d70cc534b3a3784e?container-tabs=gti
-    container: registry.access.redhat.com/ubi8/ubi:8.8-1032.1692772289
+    # See: https://catalog.redhat.com/en/search?searchType=Containers&q=Red+Hat+Universal+Base+Image+8
+    #      https://hub.docker.com/r/redhat/ubi8
+    container: redhat/ubi8
    # The job outputs link to the outputs of the 'rpmbuild' step
    outputs:
      rpm : ${{steps.rpmbuild.outputs.RPM}}
@@ -190,22 +174,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.noarch.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo ubi-8-appstream-rpms install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -215,24 +191,25 @@ jobs:

    # See: https://github.com/actions/upload-artifact
    - name: Save RPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector RPM for UBI 8
        path: ${{ steps.rpmbuild.outputs.RPM }}
        overwrite: true
    - name: Save SRPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector SRPM for UBI 8
        path: ${{ steps.rpmbuild.outputs.SRPM }}
        overwrite: true

  #
-  # Build on UBI 9 using go-toolset
+  # Build on Red Hat Universal Base Image (UBI 9) using go-toolset
  #
  UBI-9-RPM-build:
    runs-on: ubuntu-latest
-    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
+    # See: https://catalog.redhat.com/en/search?searchType=Containers&q=Red+Hat+Universal+Base+Image+9
+    #      https://hub.docker.com/r/redhat/ubi9
    container: redhat/ubi9
    # The job outputs link to the outputs of the 'rpmbuild' step
    # The job outputs link to the outputs of the 'rpmbuild' step
@@ -249,24 +226,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # See: https://github.com/marketplace/actions/setup-go-environment
-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.el9_6.noarch.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-race-1.23.9-1.el9_6.x86_64.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo ubi-9-appstream-rpms install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -276,13 +243,13 @@ jobs:

    # See: https://github.com/actions/upload-artifact
    - name: Save RPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector RPM for UBI 9
        path: ${{ steps.rpmbuild.outputs.RPM }}
        overwrite: true
    - name: Save SRPM as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector SRPM for UBI 9
        path: ${{ steps.rpmbuild.outputs.SRPM }}
@@ -308,13 +275,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0
-
+    # Use official golang package
+    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
      with:
        go-version: 'stable'

@@ -332,7 +300,7 @@ jobs:
        echo "DEB=${NEW_DEB_FILE}" >> $GITHUB_OUTPUT
    # See: https://github.com/actions/upload-artifact
    - name: Save DEB as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector DEB for Ubuntu 22.04
        path: ${{ steps.debrename.outputs.DEB }}
@@ -358,13 +326,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0
-
+    # Use official golang package
+    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
      with:
        go-version: 'stable'

@@ -382,7 +351,7 @@ jobs:
        echo "DEB=${NEW_DEB_FILE}" >> $GITHUB_OUTPUT
    # See: https://github.com/actions/upload-artifact
    - name: Save DEB as artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
      with:
        name: cc-metric-collector DEB for Ubuntu 24.04
        path: ${{ steps.debrename.outputs.DEB }}
@@ -400,48 +369,48 @@ jobs:
    steps:
    # See: https://github.com/actions/download-artifact
    - name: Download AlmaLinux 8 RPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector RPM for AlmaLinux 8
    - name: Download AlmaLinux 8 SRPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector SRPM for AlmaLinux 8

    - name: Download AlmaLinux 9 RPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector RPM for AlmaLinux 9
    - name: Download AlmaLinux 9 SRPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector SRPM for AlmaLinux 9

    - name: Download UBI 8 RPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector RPM for UBI 8
    - name: Download UBI 8 SRPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector SRPM for UBI 8

    - name: Download UBI 9 RPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector RPM for UBI 9
    - name: Download UBI 9 SRPM
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector SRPM for UBI 9

    - name: Download Ubuntu 22.04 DEB
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector DEB for Ubuntu 22.04

    - name: Download Ubuntu 24.04 DEB
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v7
      with:
        name: cc-metric-collector DEB for Ubuntu 24.04

--- a/.github/workflows/runonce.yml
+++ b/.github/workflows/runonce.yml
@@ -20,25 +20,41 @@ jobs:
    # See: https://github.com/marketplace/actions/checkout
    # Checkout git repository and submodules
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive

    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
      with:
-        go-version: '1.21'
+        go-version: 'stable'
        check-latest: true

+    - name: Install reviewdog
+      run: |
+        go install github.com/reviewdog/reviewdog/cmd/reviewdog@latest
+
+    # See: https://golangci-lint.run
+    - name: Install GolangCI-Lint
+      run: |
+        go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
+
    - name: Build MetricCollector
      run: make

    - name: Run MetricCollector once
      run: ./cc-metric-collector --once --config .github/ci-config.json

+    # Running the linter requires likwid.h, which gets downloaded in the build step
+    - name: Static Analysis with GolangCI-Lint and Upload Report with reviewdog
+      run: |
+        golangci-lint run --enable errorlint,govet,misspell,modernize,prealloc,staticcheck,unconvert,wastedassign | reviewdog -f=golangci-lint -name "Check golangci-lint on build-latest" -reporter=github-check -filter-mode=nofilter -fail-level none
+      env:
+        REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
  #
-  # Build on AlmaLinux 8
+  # Build on AlmaLinux 8 using go-toolset
  #
  AlmaLinux8-RPM-build:
    runs-on: ubuntu-latest
@@ -58,23 +74,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # See: https://github.com/marketplace/actions/setup-go-environment
-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.noarch.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo appstream install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -83,7 +90,7 @@ jobs:
          make RPM

  #
-  # Build on AlmaLinux 9
+  # Build on AlmaLinux 9 using go-toolset
  #
  AlmaLinux9-RPM-build:
    runs-on: ubuntu-latest
@@ -103,24 +110,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # See: https://github.com/marketplace/actions/setup-go-environment
-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.el9_6.noarch.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-race-1.23.9-1.el9_6.x86_64.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo appstream install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -128,13 +125,49 @@ jobs:
          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
          make RPM

+  #
+  # Build on AlmaLinux 10 using go-toolset
+  #
+  AlmaLinux10-RPM-build:
+    runs-on: ubuntu-latest
+    # See: https://hub.docker.com/_/almalinux
+    container: almalinux:10
+    # The job outputs link to the outputs of the 'rpmrename' step
+    # Only job outputs can be used in child jobs
+    steps:
+
+    # Use dnf to install development packages
+    - name: Install development packages
+      run: |
+          dnf --assumeyes group install "Development Tools" "RPM Development Tools"
+          dnf --assumeyes install wget openssl-devel diffutils delve which
+
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v6
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    - name: Setup Golang
+      run: |
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo appstream install go-toolset
+
+    - name: RPM build MetricCollector
+      id: rpmbuild
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM

  #
-  # Build on UBI 8 using go-toolset
+  # Build on Red Hat Universal Base Image (UBI 8) using go-toolset
  #
  UBI-8-RPM-build:
    runs-on: ubuntu-latest
-    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
+    # See: https://catalog.redhat.com/en/search?searchType=Containers&q=Red+Hat+Universal+Base+Image+8
+    #      https://hub.docker.com/r/redhat/ubi8
    container: redhat/ubi8
    # The job outputs link to the outputs of the 'rpmbuild' step
    steps:
@@ -147,23 +180,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # See: https://github.com/marketplace/actions/setup-go-environment
-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/8/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.module_el8.10.0+4000+1ad1b2cc.noarch.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo ubi-8-appstream-rpms install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -172,11 +196,12 @@ jobs:
          make RPM

  #
-  # Build on UBI 9 using go-toolset
+  # Build on Red Hat Universal Base Image (UBI 9) using go-toolset
  #
  UBI-9-RPM-build:
    runs-on: ubuntu-latest
-    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
+    # See: https://catalog.redhat.com/en/search?searchType=Containers&q=Red+Hat+Universal+Base+Image+9
+    #      https://hub.docker.com/r/redhat/ubi9
    container: redhat/ubi9
    # The job outputs link to the outputs of the 'rpmbuild' step
    steps:
@@ -189,24 +214,48 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0

-    # See: https://github.com/marketplace/actions/setup-go-environment
-    # - name: Setup Golang
-    #   uses: actions/setup-go@v5
-    #   with:
-    #     go-version: 'stable'
    - name: Setup Golang
      run: |
-          dnf --assumeyes --disableplugin=subscription-manager install \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/go-toolset-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-bin-1.23.9-1.el9_6.x86_64.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-src-1.23.9-1.el9_6.noarch.rpm \
-              https://repo.almalinux.org/almalinux/9/AppStream/x86_64/os/Packages/golang-race-1.23.9-1.el9_6.x86_64.rpm
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo ubi-9-appstream-rpms install go-toolset
+
+    - name: RPM build MetricCollector
+      id: rpmbuild
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM
+
+  #
+  # Build on Red Hat Universal Base Image (UBI 10) using go-toolset
+  #
+  UBI-10-RPM-build:
+    runs-on: ubuntu-latest
+    # See: https://catalog.redhat.com/en/search?searchType=Containers&q=Red+Hat+Universal+Base+Image+10
+    #      https://hub.docker.com/r/redhat/ubi10
+    container: redhat/ubi10
+    # The job outputs link to the outputs of the 'rpmbuild' step
+    steps:
+
+    # Use dnf to install development packages
+    - name: Install development packages
+      run: dnf --assumeyes --disableplugin=subscription-manager install rpm-build go-srpm-macros gcc make python3 git wget openssl-devel diffutils delve
+
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v6
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    - name: Setup Golang
+      run: |
+          dnf --assumeyes --disableplugin=subscription-manager --enablerepo ubi-10-for-x86_64-appstream-rpms install go-toolset

    - name: RPM build MetricCollector
      id: rpmbuild
@@ -231,14 +280,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0
    # Use official golang package
    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
      with:
        go-version: 'stable'

@@ -265,14 +314,14 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
      with:
        submodules: recursive
        fetch-depth: 0
    # Use official golang package
    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
      with:
        go-version: 'stable'

--- a/5
+++ b/5
@@ -72,6 +72,11 @@ staticcheck:
 	$(GOBIN) install honnef.co/go/tools/cmd/staticcheck@latest
 	$$($(GOBIN) env GOPATH)/bin/staticcheck ./...

+.PHONY: golangci-lint
+golangci-lint:
+	$(GOBIN) install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
+	$$($(GOBIN) env GOPATH)/bin/golangci-lint run
+
 .ONESHELL:
 .PHONY: RPM
 RPM: scripts/cc-metric-collector.spec
--- a/cc-metric-collector.go
+++ b/cc-metric-collector.go
@@ -14,17 +14,17 @@ import (
 	"os/signal"
 	"syscall"

-	"github.com/ClusterCockpit/cc-lib/receivers"
-	"github.com/ClusterCockpit/cc-lib/sinks"
+	"github.com/ClusterCockpit/cc-lib/v2/receivers"
+	"github.com/ClusterCockpit/cc-lib/v2/sinks"
 	"github.com/ClusterCockpit/cc-metric-collector/collectors"

 	//	"strings"
 	"sync"
 	"time"

-	ccconf "github.com/ClusterCockpit/cc-lib/ccConfig"
-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	ccconf "github.com/ClusterCockpit/cc-lib/v2/ccConfig"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	mr "github.com/ClusterCockpit/cc-metric-collector/internal/metricRouter"
 	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
@@ -50,30 +50,6 @@ type RuntimeConfig struct {
 	Sync     sync.WaitGroup
 }

-//// Structure of the configuration file
-//type GlobalConfig struct {
-//	Sink           sinks.SinkConfig           `json:"sink"`
-//	Interval       int                        `json:"interval"`
-//	Duration       int                        `json:"duration"`
-//	Collectors     []string                   `json:"collectors"`
-//	Receiver       receivers.ReceiverConfig   `json:"receiver"`
-//	DefTags        map[string]string          `json:"default_tags"`
-//	CollectConfigs map[string]json.RawMessage `json:"collect_config"`
-//}
-
-//// Load JSON configuration file
-//func LoadConfiguration(file string, config *GlobalConfig) error {
-//	configFile, err := os.Open(file)
-//	defer configFile.Close()
-//	if err != nil {
-//		fmt.Println(err.Error())
-//		return err
-//	}
-//	jsonParser := json.NewDecoder(configFile)
-//	err = jsonParser.Decode(config)
-//	return err
-//}
-
 func ReadCli() map[string]string {
 	var m map[string]string
 	cfg := flag.String("config", "./config.json", "Path to configuration file")
@@ -93,22 +69,6 @@ func ReadCli() map[string]string {
 	return m
 }

-//func SetLogging(logfile string) error {
-//	var file *os.File
-//	var err error
-//	if logfile != "stderr" {
-//		file, err = os.OpenFile(logfile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
-//		if err != nil {
-//			log.Fatal(err)
-//			return err
-//		}
-//	} else {
-//		file = os.Stderr
-//	}
-//	log.SetOutput(file)
-//	return nil
-//}
-
 // General shutdownHandler function that gets executed in case of interrupt or graceful shutdownHandler
 func shutdownHandler(config *RuntimeConfig, shutdownSignal chan os.Signal) {
 	defer config.Sync.Done()
@@ -216,11 +176,6 @@ func mainFunc() int {
 		return 1
 	}

-	// Set log file
-	// if logfile := rcfg.CliArgs["logfile"]; logfile != "stderr" {
-	// 	cclog.SetOutput(logfile)
-	// }
-
 	// Creat new multi channel ticker
 	rcfg.MultiChanTicker = mct.NewTicker(rcfg.Interval)

--- a/collectors/README.md
+++ b/collectors/README.md
@@ -67,7 +67,7 @@ A collector reads data from any source, parses it to metrics and submits these m
 * `Read(duration time.Duration, output chan ccMessage.CCMessage)`: Read, parse and submit data to the `output` channel as [`CCMessage`](https://github.com/ClusterCockpit/cc-lib/blob/main/ccMessage/README.md). If the collector has to measure anything for some duration, use the provided function argument `duration`.
 * `Close()`: Closes down the collector.

-It is recommanded to call `setup()` in the `Init()` function.
+It is recommended to call `setup()` in the `Init()` function.

 Finally, the collector needs to be registered in the `collectorManager.go`. There is a list of collectors called `AvailableCollectors` which is a map (`collector_type_string` -> `pointer to MetricCollector interface`). Add a new entry with a descriptive name and the new collector.

@@ -100,11 +100,12 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
    }

    m.name = "SampleCollector"
-    m.setup()
+    if err := m.setup(); err != nil {
+        return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+    }
    if len(config) > 0 {
-        err := json.Unmarshal(config, &m.config)
-        if err != nil {
-            return err
+        if err := json.Unmarshal(config, &m.config); err != nil {
+            return fmt.Errorf("%s Init(): json.Unmarshal() call failed: %w", m.name, err)
        }
    }
    m.meta = map[string]string{"source": m.name, "group": "Sample"}
--- a/collectors/beegfsmetaMetric.go
+++ b/collectors/beegfsmetaMetric.go
@@ -17,12 +17,13 @@ import (
 	"os/exec"
 	"os/user"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const DEFAULT_BEEGFS_CMD = "beegfs-ctl"
@@ -61,7 +62,9 @@ func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {
 		"rmXA", "setXA", "mirror"}

 	m.name = "BeegfsMetaCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	// Set default beegfs-ctl binary

@@ -75,11 +78,10 @@ func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {
 		}
 	}

-	//create map with possible variables
+	// Create map with possible variables
 	m.matches = make(map[string]string)
 	for _, value := range nodeMdstat_array {
-		_, skip := stringArrayContains(m.config.ExcludeMetrics, value)
-		if skip {
+		if slices.Contains(m.config.ExcludeMetrics, value) {
 			m.matches["other"] = "0"
 		} else {
 			m.matches["beegfs_cmeta_"+value] = "0"
@@ -102,7 +104,7 @@ func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {
 	// Beegfs file system statistics can only be queried by user root
 	user, err := user.Current()
 	if err != nil {
-		return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to get current user: %v", err)
+		return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to get current user: %w", err)
 	}
 	if user.Uid != "0" {
 		return fmt.Errorf("BeegfsMetaCollector.Init(): BeeGFS file system statistics can only be queried by user root")
@@ -111,7 +113,7 @@ func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {
 	// Check if beegfs-ctl is in executable search path
 	_, err = exec.LookPath(m.config.Beegfs)
 	if err != nil {
-		return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to find beegfs-ctl binary '%s': %v", m.config.Beegfs, err)
+		return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to find beegfs-ctl binary '%s': %w", m.config.Beegfs, err)
 	}
 	m.init = true
 	return nil
@@ -121,7 +123,7 @@ func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMess
 	if !m.init {
 		return
 	}
-	//get mounpoint
+	// Get mounpoint
 	buffer, _ := os.ReadFile(string("/proc/mounts"))
 	mounts := strings.Split(string(buffer), "\n")
 	var mountpoints []string
@@ -162,12 +164,15 @@ func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMess
 		cmd.Stderr = cmdStderr
 		err := cmd.Run()
 		if err != nil {
-			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): Failed to execute command \"%s\": %s\n", cmd.String(), err.Error())
-			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode())
-			data, _ := io.ReadAll(cmdStderr)
-			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stderr: \"%s\"\n", string(data))
-			data, _ = io.ReadAll(cmdStdout)
-			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stdout: \"%s\"\n", string(data))
+			dataStdErr, _ := io.ReadAll(cmdStderr)
+			dataStdOut, _ := io.ReadAll(cmdStdout)
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to execute command \"%s\": %v\n", cmd.String(), err),
+				fmt.Sprintf("Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode()),
+				fmt.Sprintf("Read(): command stderr: \"%s\"\n", string(dataStdErr)),
+				fmt.Sprintf("Read(): command stdout: \"%s\"\n", string(dataStdOut)),
+			)
 			return
 		}
 		// Read I/O statistics
@@ -223,7 +228,7 @@ func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMess

 			for key, data := range m.matches {
 				value, _ := strconv.ParseFloat(data, 32)
-				y, err := lp.NewMessage(key, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+				y, err := lp.NewMessage(key, m.tags, m.meta, map[string]any{"value": value}, time.Now())
 				if err == nil {
 					output <- y
 				}
--- a/collectors/beegfsstorageMetric.go
+++ b/collectors/beegfsstorageMetric.go
@@ -17,12 +17,13 @@ import (
 	"os/exec"
 	"os/user"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // Struct for the collector-specific JSON config
@@ -54,7 +55,9 @@ func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {
 		"storInf", "unlnk"}

 	m.name = "BeegfsStorageCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	// Set default beegfs-ctl binary

@@ -71,8 +74,7 @@ func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {
 	//create map with possible variables
 	m.matches = make(map[string]string)
 	for _, value := range storageStat_array {
-		_, skip := stringArrayContains(m.config.ExcludeMetrics, value)
-		if skip {
+		if slices.Contains(m.config.ExcludeMetrics, value) {
 			m.matches["other"] = "0"
 		} else {
 			m.matches["beegfs_cstorage_"+value] = "0"
@@ -95,7 +97,7 @@ func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {
 	// Beegfs file system statistics can only be queried by user root
 	user, err := user.Current()
 	if err != nil {
-		return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to get current user: %v", err)
+		return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to get current user: %w", err)
 	}
 	if user.Uid != "0" {
 		return fmt.Errorf("BeegfsStorageCollector.Init(): BeeGFS file system statistics can only be queried by user root")
@@ -104,7 +106,7 @@ func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {
 	// Check if beegfs-ctl is in executable search path
 	_, err = exec.LookPath(m.config.Beegfs)
 	if err != nil {
-		return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to find beegfs-ctl binary '%s': %v", m.config.Beegfs, err)
+		return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to find beegfs-ctl binary '%s': %w", m.config.Beegfs, err)
 	}
 	m.init = true
 	return nil
@@ -154,12 +156,15 @@ func (m *BeegfsStorageCollector) Read(interval time.Duration, output chan lp.CCM
 		cmd.Stderr = cmdStderr
 		err := cmd.Run()
 		if err != nil {
-			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): Failed to execute command \"%s\": %s\n", cmd.String(), err.Error())
-			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode())
-			data, _ := io.ReadAll(cmdStderr)
-			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stderr: \"%s\"\n", string(data))
-			data, _ = io.ReadAll(cmdStdout)
-			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stdout: \"%s\"\n", string(data))
+			dataStdErr, _ := io.ReadAll(cmdStderr)
+			dataStdOut, _ := io.ReadAll(cmdStdout)
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to execute command \"%s\": %v\n", cmd.String(), err),
+				fmt.Sprintf("Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode()),
+				fmt.Sprintf("Read(): command stderr: \"%s\"\n", string(dataStdErr)),
+				fmt.Sprintf("Read(): command stdout: \"%s\"\n", string(dataStdOut)),
+			)
 			return
 		}
 		// Read I/O statistics
@@ -215,7 +220,7 @@ func (m *BeegfsStorageCollector) Read(interval time.Duration, output chan lp.CCM

 			for key, data := range m.matches {
 				value, _ := strconv.ParseFloat(data, 32)
-				y, err := lp.NewMessage(key, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+				y, err := lp.NewMessage(key, m.tags, m.meta, map[string]any{"value": value}, time.Now())
 				if err == nil {
 					output <- y
 				}
--- a/collectors/collectorManager.go
+++ b/collectors/collectorManager.go
@@ -9,11 +9,12 @@ package collectors

 import (
 	"encoding/json"
+	"fmt"
 	"sync"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )

@@ -104,7 +105,7 @@ func (cm *collectorManager) Init(ticker mct.MultiChanTicker, duration time.Durat

 		err = collector.Init(collectorCfg)
 		if err != nil {
-			cclog.ComponentError("CollectorManager", "Collector", collectorName, "initialization failed:", err.Error())
+			cclog.ComponentError("CollectorManager", fmt.Sprintf("Collector %s initialization failed: %v", collectorName, err))
 			continue
 		}
 		cclog.ComponentDebug("CollectorManager", "ADD COLLECTOR", collector.Name())
--- a/collectors/cpufreqCpuinfoMetric.go
+++ b/collectors/cpufreqCpuinfoMetric.go
@@ -17,8 +17,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // CPUFreqCollector
@@ -35,15 +35,16 @@ type CPUFreqCpuInfoCollector struct {
 	topology []CPUFreqCpuInfoCollectorTopology
 }

-func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
+func (m *CPUFreqCpuInfoCollector) Init(_ json.RawMessage) error {
 	// Check if already initialized
 	if m.init {
 		return nil
 	}

-	m.setup()
-
 	m.name = "CPUFreqCpuInfoCollector"
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
@@ -54,9 +55,8 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 	const cpuInfoFile = "/proc/cpuinfo"
 	file, err := os.Open(cpuInfoFile)
 	if err != nil {
-		return fmt.Errorf("failed to open file '%s': %v", cpuInfoFile, err)
+		return fmt.Errorf("%s Init(): failed to open file '%s': %w", m.name, cpuInfoFile, err)
 	}
-	defer file.Close()

 	// Collect topology information from file cpuinfo
 	foundFreq := false
@@ -86,6 +86,10 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 			}
 		}

+		if err := file.Close(); err != nil {
+			return fmt.Errorf("%s Init(): Call to file.Close() failed: %w", m.name, err)
+		}
+
 		// were all topology information collected?
 		if foundFreq &&
 			len(processor) > 0 &&
@@ -119,7 +123,7 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {

 	// Check if at least one CPU with frequency information was detected
 	if len(m.topology) == 0 {
-		return fmt.Errorf("no CPU frequency info found in %s", cpuInfoFile)
+		return fmt.Errorf("%s Init(): no CPU frequency info found in %s", m.name, cpuInfoFile)
 	}

 	m.init = true
@@ -140,7 +144,13 @@ func (m *CPUFreqCpuInfoCollector) Read(interval time.Duration, output chan lp.CC
 			fmt.Sprintf("Read(): Failed to open file '%s': %v", cpuInfoFile, err))
 		return
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", cpuInfoFile, err))
+		}
+	}()

 	processorCounter := 0
 	now := time.Now()
@@ -161,7 +171,7 @@ func (m *CPUFreqCpuInfoCollector) Read(interval time.Duration, output chan lp.CC
 							fmt.Sprintf("Read(): Failed to convert cpu MHz '%s' to float64: %v", lineSplit[1], err))
 						return
 					}
-					if y, err := lp.NewMessage("cpufreq", t.tagSet, m.meta, map[string]interface{}{"value": value}, now); err == nil {
+					if y, err := lp.NewMessage("cpufreq", t.tagSet, m.meta, map[string]any{"value": value}, now); err == nil {
 						output <- y
 					}
 				}
--- a/collectors/cpufreqMetric.go
+++ b/collectors/cpufreqMetric.go
@@ -16,8 +16,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	"github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"golang.org/x/sys/unix"
 )
@@ -48,7 +48,9 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 	}

 	m.name = "CPUFreqCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
@@ -74,15 +76,15 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		scalingCurFreqFile := filepath.Join("/sys/devices/system/cpu", fmt.Sprintf("cpu%d", c.CpuID), "cpufreq/scaling_cur_freq")
 		err := unix.Access(scalingCurFreqFile, unix.R_OK)
 		if err != nil {
-			return fmt.Errorf("unable to access file '%s': %v", scalingCurFreqFile, err)
+			return fmt.Errorf("unable to access file '%s': %w", scalingCurFreqFile, err)
 		}

 		m.topology = append(m.topology,
 			CPUFreqCollectorTopology{
 				tagSet: map[string]string{
 					"type":       "hwthread",
-					"type-id":    fmt.Sprint(c.CpuID),
-					"package_id": fmt.Sprint(c.Socket),
+					"type-id":    strconv.Itoa(c.CpuID),
+					"package_id": strconv.Itoa(c.Socket),
 				},
 				scalingCurFreqFile: scalingCurFreqFile,
 			},
@@ -124,7 +126,7 @@ func (m *CPUFreqCollector) Read(interval time.Duration, output chan lp.CCMessage
 			continue
 		}

-		if y, err := lp.NewMessage("cpufreq", t.tagSet, m.meta, map[string]interface{}{"value": cpuFreq}, now); err == nil {
+		if y, err := lp.NewMessage("cpufreq", t.tagSet, m.meta, map[string]any{"value": cpuFreq}, now); err == nil {
 			output <- y
 		}
 	}
--- a/collectors/cpustatMetric.go
+++ b/collectors/cpustatMetric.go
@@ -12,12 +12,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	sysconf "github.com/tklauser/go-sysconf"
 )

@@ -39,10 +40,17 @@ type CpustatCollector struct {

 func (m *CpustatCollector) Init(config json.RawMessage) error {
 	m.name = "CpustatCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
-	m.meta = map[string]string{"source": m.name, "group": "CPU"}
-	m.nodetags = map[string]string{"type": "node"}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "CPU",
+	}
+	m.nodetags = map[string]string{
+		"type": "node",
+	}
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -64,14 +72,7 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {

 	m.matches = make(map[string]int)
 	for match, index := range matches {
-		doExclude := false
-		for _, exclude := range m.config.ExcludeMetrics {
-			if match == exclude {
-				doExclude = true
-				break
-			}
-		}
-		if !doExclude {
+		if !slices.Contains(m.config.ExcludeMetrics, match) {
 			m.matches[match] = index
 		}
 	}
@@ -79,9 +80,17 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 	// Check input file
 	file, err := os.Open(string(CPUSTATFILE))
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Init(): Failed to open file '%s': %v", string(CPUSTATFILE), err))
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Init(): Failed to close file '%s': %v", string(CPUSTATFILE), err))
+		}
+	}()

 	// Pre-generate tags for all CPUs
 	num_cpus := 0
@@ -99,7 +108,9 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 		} else if strings.HasPrefix(linefields[0], "cpu") && strings.Compare(linefields[0], "cpu") != 0 {
 			cpustr := strings.TrimLeft(linefields[0], "cpu")
 			cpu, _ := strconv.Atoi(cpustr)
-			m.cputags[linefields[0]] = map[string]string{"type": "hwthread", "type-id": fmt.Sprintf("%d", cpu)}
+			m.cputags[linefields[0]] = map[string]string{
+				"type":    "hwthread",
+				"type-id": strconv.Itoa(cpu)}
 			m.olddata[linefields[0]] = make(map[string]int64)
 			for k, v := range m.matches {
 				m.olddata[linefields[0]][k], _ = strconv.ParseInt(linefields[v], 0, 64)
@@ -129,7 +140,7 @@ func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]st
 	sum := float64(0)
 	for name, value := range values {
 		sum += value
-		y, err := lp.NewMessage(name, tags, m.meta, map[string]interface{}{"value": value * 100}, now)
+		y, err := lp.NewMessage(name, tags, m.meta, map[string]any{"value": value * 100}, now)
 		if err == nil {
 			y.AddTag("unit", "Percent")
 			output <- y
@@ -137,7 +148,7 @@ func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]st
 	}
 	if v, ok := values["cpu_idle"]; ok {
 		sum -= v
-		y, err := lp.NewMessage("cpu_used", tags, m.meta, map[string]interface{}{"value": sum * 100}, now)
+		y, err := lp.NewMessage("cpu_used", tags, m.meta, map[string]any{"value": sum * 100}, now)
 		if err == nil {
 			y.AddTag("unit", "Percent")
 			output <- y
@@ -155,9 +166,17 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMessage

 	file, err := os.Open(string(CPUSTATFILE))
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", string(CPUSTATFILE), err))
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", string(CPUSTATFILE), err))
+		}
+	}()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -174,7 +193,7 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMessage
 	num_cpus_metric, err := lp.NewMessage("num_cpus",
 		m.nodetags,
 		m.meta,
-		map[string]interface{}{"value": int(num_cpus)},
+		map[string]any{"value": num_cpus},
 		now,
 	)
 	if err == nil {
--- a/collectors/customCmdMetric.go
+++ b/collectors/customCmdMetric.go
@@ -10,13 +10,16 @@ package collectors
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"os/exec"
+	"slices"
 	"strings"
 	"time"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	influx "github.com/influxdata/line-protocol"
 )

@@ -41,22 +44,31 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "CustomCmdCollector"
 	m.parallel = true
-	m.meta = map[string]string{"source": m.name, "group": "Custom"}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "Custom",
+	}
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
-			log.Print(err.Error())
-			return err
+			return fmt.Errorf("%s Init(): json.Unmarshal() call failed: %w", m.name, err)
 		}
 	}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	for _, c := range m.config.Commands {
 		cmdfields := strings.Fields(c)
-		command := exec.Command(cmdfields[0], strings.Join(cmdfields[1:], " "))
-		command.Wait()
+		command := exec.Command(cmdfields[0], cmdfields[1:]...)
 		_, err = command.Output()
 		if err == nil {
 			m.commands = append(m.commands, c)
+		} else {
+			cclog.ComponentWarn(
+				m.name,
+				fmt.Sprintf("%s Init(): Execution of command \"%s\" failed: %v", m.name, command.String(), err),
+			)
+			continue
 		}
 	}
 	for _, f := range m.config.Files {
@@ -64,7 +76,10 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 		if err == nil {
 			m.files = append(m.files, f)
 		} else {
-			log.Print(err.Error())
+			cclog.ComponentWarn(
+				m.name,
+				fmt.Sprintf("%s Init(): Reading of file \"%s\" failed: %v", m.name, f, err),
+			)
 			continue
 		}
 	}
@@ -88,8 +103,11 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMessa
 	}
 	for _, cmd := range m.commands {
 		cmdfields := strings.Fields(cmd)
-		command := exec.Command(cmdfields[0], strings.Join(cmdfields[1:], " "))
-		command.Wait()
+		command := exec.Command(cmdfields[0], cmdfields[1:]...)
+		if err := command.Wait(); err != nil {
+			log.Print(err)
+			continue
+		}
 		stdout, err := command.Output()
 		if err != nil {
 			log.Print(err)
@@ -101,8 +119,7 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMessa
 			continue
 		}
 		for _, c := range cmdmetrics {
-			_, skip := stringArrayContains(m.config.ExcludeMetrics, c.Name())
-			if skip {
+			if slices.Contains(m.config.ExcludeMetrics, c.Name()) {
 				continue
 			}

@@ -121,8 +138,7 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMessa
 			continue
 		}
 		for _, f := range fmetrics {
-			_, skip := stringArrayContains(m.config.ExcludeMetrics, f.Name())
-			if skip {
+			if slices.Contains(m.config.ExcludeMetrics, f.Name()) {
 				continue
 			}
 			output <- lp.FromInfluxMetric(f)
--- a/collectors/diskstatMetric.go
+++ b/collectors/diskstatMetric.go
@@ -10,13 +10,14 @@ package collectors
 import (
 	"bufio"
 	"encoding/json"
+	"fmt"
 	"os"
 	"strings"
 	"syscall"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const MOUNTFILE = `/proc/self/mounts`
@@ -36,7 +37,9 @@ func (m *DiskstatCollector) Init(config json.RawMessage) error {
 	m.name = "DiskstatCollector"
 	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Disk"}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	if len(config) > 0 {
 		if err := json.Unmarshal(config, &m.config); err != nil {
 			return err
@@ -54,10 +57,11 @@ func (m *DiskstatCollector) Init(config json.RawMessage) error {
 	}
 	file, err := os.Open(MOUNTFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
-		return err
+		return fmt.Errorf("%s Init(): file open for file \"%s\" failed: %w", m.name, MOUNTFILE, err)
+	}
+	if err := file.Close(); err != nil {
+		return fmt.Errorf("%s Init(): file close for file \"%s\" failed: %w", m.name, MOUNTFILE, err)
 	}
-	defer file.Close()
 	m.init = true
 	return nil
 }
@@ -69,10 +73,18 @@ func (m *DiskstatCollector) Read(interval time.Duration, output chan lp.CCMessag

 	file, err := os.Open(MOUNTFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", MOUNTFILE, err))
 		return
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", MOUNTFILE, err))
+		}
+	}()

 	part_max_used := uint64(0)
 	scanner := bufio.NewScanner(file)
@@ -93,7 +105,7 @@ mountLoop:
 			continue
 		}

-		mountPath := strings.Replace(linefields[1], `\040`, " ", -1)
+		mountPath := strings.ReplaceAll(linefields[1], `\040`, " ")

 		for _, excl := range m.config.ExcludeMounts {
 			if strings.Contains(mountPath, excl) {
@@ -112,7 +124,13 @@ mountLoop:
 		tags := map[string]string{"type": "node", "device": linefields[0]}
 		total := (stat.Blocks * uint64(stat.Bsize)) / uint64(1000000000)
 		if m.allowedMetrics["disk_total"] {
-			y, err := lp.NewMessage("disk_total", tags, m.meta, map[string]interface{}{"value": total}, time.Now())
+			y, err := lp.NewMessage(
+				"disk_total",
+				tags,
+				m.meta,
+				map[string]any{
+					"value": total},
+				time.Now())
 			if err == nil {
 				y.AddMeta("unit", "GBytes")
 				output <- y
@@ -120,7 +138,13 @@ mountLoop:
 		}
 		free := (stat.Bfree * uint64(stat.Bsize)) / uint64(1000000000)
 		if m.allowedMetrics["disk_free"] {
-			y, err := lp.NewMessage("disk_free", tags, m.meta, map[string]interface{}{"value": free}, time.Now())
+			y, err := lp.NewMessage(
+				"disk_free",
+				tags,
+				m.meta,
+				map[string]any{
+					"value": free},
+				time.Now())
 			if err == nil {
 				y.AddMeta("unit", "GBytes")
 				output <- y
@@ -134,7 +158,14 @@ mountLoop:
 		}
 	}
 	if m.allowedMetrics["part_max_used"] {
-		y, err := lp.NewMessage("part_max_used", map[string]string{"type": "node"}, m.meta, map[string]interface{}{"value": int(part_max_used)}, time.Now())
+		y, err := lp.NewMessage(
+			"part_max_used",
+			map[string]string{
+				"type": "node"},
+			m.meta,
+			map[string]any{
+				"value": int(part_max_used)},
+			time.Now())
 		if err == nil {
 			y.AddMeta("unit", "percent")
 			output <- y
--- a/collectors/gpfsMetric.go
+++ b/collectors/gpfsMetric.go
@@ -14,49 +14,294 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"os/exec"
 	"os/user"
+	"slices"
 	"strconv"
 	"strings"
 	"syscall"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const DEFAULT_GPFS_CMD = "mmpmon"

-type GpfsCollectorLastState struct {
-	numOpens    	int64
-	numCloses 		int64
-	numReads		int64
-	numWrites		int64
-	numReaddirs		int64
-	numInodeUpdates int64
-	bytesRead    	int64
-	bytesWritten 	int64
-	bytesTotal		int64
-	iops			int64
-	metaops			int64
+type GpfsCollectorState map[string]int64
+
+type GpfsCollectorConfig struct {
+	Mmpmon             string   `json:"mmpmon_path,omitempty"`
+	ExcludeFilesystem  []string `json:"exclude_filesystem,omitempty"`
+	ExcludeMetrics     []string `json:"exclude_metrics,omitempty"`
+	Sudo               bool     `json:"use_sudo,omitempty"`
+	SendAbsoluteValues bool     `json:"send_abs_values,omitempty"`
+	SendDiffValues     bool     `json:"send_diff_values,omitempty"`
+	SendDerivedValues  bool     `json:"send_derived_values,omitempty"`
+	SendTotalValues    bool     `json:"send_total_values,omitempty"`
+	SendBandwidths     bool     `json:"send_bandwidths,omitempty"`
+}
+
+type GpfsMetricDefinition struct {
+	name   string
+	desc   string
+	prefix string
+	unit   string
+	calc   string
 }

 type GpfsCollector struct {
 	metricCollector
 	tags          map[string]string
-	config struct {
-		Mmpmon            string   `json:"mmpmon_path,omitempty"`
-		ExcludeFilesystem []string `json:"exclude_filesystem,omitempty"`
-		Sudo              bool     `json:"use_sudo,omitempty"`
-		SendBandwidths    bool     `json:"send_bandwidths"`
-		SendTotalValues   bool     `json:"send_total_values"`
-		SendDerivedValues bool     `json:"send_derived_values"`
-	}
+	config        GpfsCollectorConfig
 	sudoCmd       string
 	skipFS        map[string]struct{}
-	lastTimestamp time.Time // Store time stamp of last tick to derive bandwidths
-	lastState     map[string]GpfsCollectorLastState
+	lastTimestamp map[string]time.Time          // Store timestamp of lastState per filesystem to derive bandwidths
+	definitions   []GpfsMetricDefinition        // all metrics to report
+	lastState     map[string]GpfsCollectorState // one GpfsCollectorState per filesystem
+}
+
+var GpfsAbsMetrics = []GpfsMetricDefinition{
+	{
+		name:   "gpfs_num_opens",
+		desc:   "number of opens",
+		prefix: "_oc_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_num_closes",
+		desc:   "number of closes",
+		prefix: "_cc_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_num_reads",
+		desc:   "number of reads",
+		prefix: "_rdc_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_num_writes",
+		desc:   "number of writes",
+		prefix: "_wc_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_num_readdirs",
+		desc:   "number of readdirs",
+		prefix: "_dir_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_num_inode_updates",
+		desc:   "number of Inode Updates",
+		prefix: "_iu_",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_bytes_read",
+		desc:   "bytes read",
+		prefix: "_br_",
+		unit:   "bytes",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_bytes_written",
+		desc:   "bytes written",
+		prefix: "_bw_",
+		unit:   "bytes",
+		calc:   "none",
+	},
+}
+
+var GpfsDiffMetrics = []GpfsMetricDefinition{
+	{
+		name:   "gpfs_num_opens_diff",
+		desc:   "number of opens (diff)",
+		prefix: "_oc_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_num_closes_diff",
+		desc:   "number of closes (diff)",
+		prefix: "_cc_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_num_reads_diff",
+		desc:   "number of reads (diff)",
+		prefix: "_rdc_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_num_writes_diff",
+		desc:   "number of writes (diff)",
+		prefix: "_wc_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_num_readdirs_diff",
+		desc:   "number of readdirs (diff)",
+		prefix: "_dir_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_num_inode_updates_diff",
+		desc:   "number of Inode Updates (diff)",
+		prefix: "_iu_",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_bytes_read_diff",
+		desc:   "bytes read (diff)",
+		prefix: "_br_",
+		unit:   "bytes",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_bytes_written_diff",
+		desc:   "bytes written (diff)",
+		prefix: "_bw_",
+		unit:   "bytes",
+		calc:   "difference",
+	},
+}
+
+var GpfsDeriveMetrics = []GpfsMetricDefinition{
+	{
+		name:   "gpfs_opens_rate",
+		desc:   "number of opens (rate)",
+		prefix: "_oc_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_closes_rate",
+		desc:   "number of closes (rate)",
+		prefix: "_oc_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_reads_rate",
+		desc:   "number of reads (rate)",
+		prefix: "_rdc_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_writes_rate",
+		desc:   "number of writes (rate)",
+		prefix: "_wc_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_readdirs_rate",
+		desc:   "number of readdirs (rate)",
+		prefix: "_dir_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_inode_updates_rate",
+		desc:   "number of Inode Updates (rate)",
+		prefix: "_iu_",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_bw_read",
+		desc:   "bytes read (rate)",
+		prefix: "_br_",
+		unit:   "bytes/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_bw_write",
+		desc:   "bytes written (rate)",
+		prefix: "_bw_",
+		unit:   "bytes/sec",
+		calc:   "derivative",
+	},
+}
+
+var GpfsTotalMetrics = []GpfsMetricDefinition{
+	{
+		name:   "gpfs_bytes_total",
+		desc:   "bytes total",
+		prefix: "bytesTotal",
+		unit:   "bytes",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_bytes_total_diff",
+		desc:   "bytes total (diff)",
+		prefix: "bytesTotal",
+		unit:   "bytes",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_bw_total",
+		desc:   "bytes total (rate)",
+		prefix: "bytesTotal",
+		unit:   "bytes/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_iops",
+		desc:   "iops",
+		prefix: "iops",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_iops_diff",
+		desc:   "iops  (diff)",
+		prefix: "iops",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_iops_rate",
+		desc:   "iops (rate)",
+		prefix: "iops",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
+	{
+		name:   "gpfs_metaops",
+		desc:   "metaops",
+		prefix: "metaops",
+		unit:   "requests",
+		calc:   "none",
+	},
+	{
+		name:   "gpfs_metaops_diff",
+		desc:   "metaops (diff)",
+		prefix: "metaops",
+		unit:   "requests",
+		calc:   "difference",
+	},
+	{
+		name:   "gpfs_metaops_rate",
+		desc:   "metaops (rate)",
+		prefix: "metaops",
+		unit:   "requests/sec",
+		calc:   "derivative",
+	},
 }

 func (m *GpfsCollector) Init(config json.RawMessage) error {
@@ -65,9 +310,10 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 		return nil
 	}

-	var err error
 	m.name = "GpfsCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true

 	// Set default mmpmon binary
@@ -75,10 +321,9 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {

 	// Read JSON configuration
 	if len(config) > 0 {
-		err = json.Unmarshal(config, &m.config)
+		err := json.Unmarshal(config, &m.config)
 		if err != nil {
-			log.Print(err.Error())
-			return err
+			return fmt.Errorf("%s Init(): failed to unmarshal JSON config: %w", m.name, err)
 		}
 	}
 	m.meta = map[string]string{
@@ -93,7 +338,8 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 	for _, fs := range m.config.ExcludeFilesystem {
 		m.skipFS[fs] = struct{}{}
 	}
-	m.lastState = make(map[string]GpfsCollectorLastState)
+	m.lastState = make(map[string]GpfsCollectorState)
+	m.lastTimestamp = make(map[string]time.Time)

 	// GPFS / IBM Spectrum Scale file system statistics can only be queried by user root
 	if !m.config.Sudo {
@@ -118,7 +364,7 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 	// when using sudo, the full path of mmpmon must be specified because
 	// exec.LookPath will not work as mmpmon is not executable as user
 	if m.config.Sudo && !strings.HasPrefix(m.config.Mmpmon, "/") {
-		return fmt.Errorf("when using sudo, mmpmon_path must be provided and an absolute path: %s", m.config.Mmpmon)
+		return fmt.Errorf("%s Init(): when using sudo, mmpmon_path must be provided and an absolute path: %s", m.name, m.config.Mmpmon)
 	}

 	// Check if mmpmon is in executable search path
@@ -131,11 +377,65 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
 			p = m.config.Mmpmon
 		} else {
 			cclog.ComponentError(m.name, fmt.Sprintf("failed to find mmpmon binary '%s': %v", m.config.Mmpmon, err))
-			return fmt.Errorf("failed to find mmpmon binary '%s': %v", m.config.Mmpmon, err)
+			return fmt.Errorf("%s Init(): failed to find mmpmon binary '%s': %w", m.name, m.config.Mmpmon, err)
 		}
 	}
 	m.config.Mmpmon = p

+	m.definitions = []GpfsMetricDefinition{}
+	if m.config.SendAbsoluteValues {
+		for _, def := range GpfsAbsMetrics {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+				m.definitions = append(m.definitions, def)
+			}
+		}
+	}
+	if m.config.SendDiffValues {
+		for _, def := range GpfsDiffMetrics {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+				m.definitions = append(m.definitions, def)
+			}
+		}
+	}
+	if m.config.SendDerivedValues {
+		for _, def := range GpfsDeriveMetrics {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+				m.definitions = append(m.definitions, def)
+			}
+		}
+	} else if m.config.SendBandwidths {
+		for _, def := range GpfsDeriveMetrics {
+			if def.unit == "bytes/sec" {
+				if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+					m.definitions = append(m.definitions, def)
+				}
+			}
+		}
+	}
+	if m.config.SendTotalValues {
+		for _, def := range GpfsTotalMetrics {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+				// only send total metrics of the types requested
+				if (def.calc == "none" && m.config.SendAbsoluteValues) ||
+					(def.calc == "difference" && m.config.SendDiffValues) ||
+					(def.calc == "derivative" && m.config.SendDerivedValues) {
+					m.definitions = append(m.definitions, def)
+				}
+			}
+		}
+	} else if m.config.SendBandwidths {
+		for _, def := range GpfsTotalMetrics {
+			if def.unit == "bytes/sec" {
+				if !slices.Contains(m.config.ExcludeMetrics, def.name) {
+					m.definitions = append(m.definitions, def)
+				}
+			}
+		}
+	}
+	if len(m.definitions) == 0 {
+		return errors.New("no metrics to collect")
+	}
+
 	m.init = true
 	return nil
 }
@@ -146,13 +446,6 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 		return
 	}

-	// Current time stamp
-	now := time.Now()
-	// time difference to last time stamp
-	timeDiff := now.Sub(m.lastTimestamp).Seconds()
-	// Save current timestamp
-	m.lastTimestamp = now
-
 	// mmpmon:
 	// -p: generate output that can be parsed
 	// -s: suppress the prompt on input
@@ -206,9 +499,7 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMessage) {

 		filesystem, ok := key_value["_fs_"]
 		if !ok {
-			cclog.ComponentError(
-				m.name,
-				"Read(): Failed to get filesystem name.")
+			cclog.ComponentError(m.name, "Read(): Failed to get filesystem name.")
 			continue
 		}

@@ -220,438 +511,142 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 		// Add filesystem tag
 		m.tags["filesystem"] = filesystem

-		// Create initial last state
-		if m.config.SendBandwidths {
 		if _, ok := m.lastState[filesystem]; !ok {
-				m.lastState[filesystem] = GpfsCollectorLastState{
-					bytesRead:    -1,
-					bytesWritten: -1,
-				}
-			}
-		}
-
-		if m.config.SendDerivedValues {
-			if _, ok := m.lastState[filesystem]; !ok {
-				m.lastState[filesystem] = GpfsCollectorLastState{
-					numReads:    -1,
-					numWrites: -1,
-					numOpens: -1,
-					numCloses: -1,
-					numReaddirs: -1,
-					numInodeUpdates: -1,
-					bytesTotal: -1,
-					iops: -1,
-					metaops: -1,
-				}
-			}		
+			m.lastState[filesystem] = make(GpfsCollectorState)
 		}

+		// read the new values from mmpmon
 		// return code
 		rc, err := strconv.Atoi(key_value["_rc_"])
 		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert return code '%s' to int: %v", key_value["_rc_"], err))
+			cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert return code '%s' to int: %v", key_value["_rc_"], err))
 			continue
 		}
 		if rc != 0 {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Filesystem '%s' is not ok.", filesystem))
+			cclog.ComponentError(m.name, fmt.Sprintf("Read(): Filesystem '%s' is not ok.", filesystem))
 			continue
 		}

+		// timestamp
 		sec, err := strconv.ParseInt(key_value["_t_"], 10, 64)
 		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert seconds '%s' to int64: %v", key_value["_t_"], err))
+			cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert seconds '%s' to int64: %v", key_value["_t_"], err))
 			continue
 		}
 		msec, err := strconv.ParseInt(key_value["_tu_"], 10, 64)
 		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert micro seconds '%s' to int64: %v", key_value["_tu_"], err))
+			cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert micro seconds '%s' to int64: %v", key_value["_tu_"], err))
 			continue
 		}
 		timestamp := time.Unix(sec, msec*1000)

-		// bytes read
-		bytesRead, err := strconv.ParseInt(key_value["_br_"], 10, 64)
+		// time difference to last time stamp
+		var timeDiff float64 = 0
+		if lastTime, ok := m.lastTimestamp[filesystem]; !ok {
+			m.lastTimestamp[filesystem] = time.Time{}
+		} else {
+			timeDiff = timestamp.Sub(lastTime).Seconds()
+		}
+
+		// get values of all abs metrics
+		newstate := make(GpfsCollectorState)
+		for _, metric := range GpfsAbsMetrics {
+			value, err := strconv.ParseInt(key_value[metric.prefix], 10, 64)
 			if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert bytes read '%s' to int64: %v", key_value["_br_"], err))
+				cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert %s '%s' to int64: %v", metric.desc, key_value[metric.prefix], err))
 				continue
 			}
-		if y, err :=
-			lp.NewMessage(
-				"gpfs_bytes_read",
-				m.tags,
-				m.meta,
-				map[string]interface{}{
-					"value": bytesRead,
-				},
-				timestamp,
-			); err == nil {
-			y.AddMeta("unit", "bytes")
-			output <- y
-		}
-		if m.config.SendBandwidths {
-			if lastBytesRead := m.lastState[filesystem].bytesRead; lastBytesRead >= 0 {
-				bwRead := float64(bytesRead-lastBytesRead) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_bw_read",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": bwRead,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "bytes/sec")
+			newstate[metric.prefix] = value
+		}
+
+		// compute total metrics (map[...] will return 0 if key not found)
+		// bytes read and written
+		if br, br_ok := newstate["_br_"]; br_ok {
+			newstate["bytesTotal"] += br
+		}
+		if bw, bw_ok := newstate["_bw_"]; bw_ok {
+			newstate["bytesTotal"] += bw
+		}
+		// read and write count
+		if rdc, rdc_ok := newstate["_rdc_"]; rdc_ok {
+			newstate["iops"] += rdc
+		}
+		if wc, wc_ok := newstate["_wc_"]; wc_ok {
+			newstate["iops"] += wc
+		}
+		// meta operations
+		if oc, oc_ok := newstate["_oc_"]; oc_ok {
+			newstate["metaops"] += oc
+		}
+		if cc, cc_ok := newstate["_cc_"]; cc_ok {
+			newstate["metaops"] += cc
+		}
+		if dir, dir_ok := newstate["_dir_"]; dir_ok {
+			newstate["metaops"] += dir
+		}
+		if iu, iu_ok := newstate["_iu_"]; iu_ok {
+			newstate["metaops"] += iu
+		}
+		// send desired metrics for this filesystem
+		for _, metric := range m.definitions {
+			vold, vold_ok := m.lastState[filesystem][metric.prefix]
+			vnew, vnew_ok := newstate[metric.prefix]
+			var value any
+			value_ok := false
+			switch metric.calc {
+			case "none":
+				if vnew_ok {
+					value = vnew
+					value_ok = true
+				} else if vold_ok {
+					// for absolute values, if the new value is not available, report no change
+					value = vold
+					value_ok = true
+				}
+			case "difference":
+				if vnew_ok && vold_ok {
+					value = vnew - vold
+					if value.(int64) < 0 {
+						value = 0
+					}
+					value_ok = true
+				} else if vold_ok {
+					// if the difference is not computable, return 0
+					value = 0
+					value_ok = true
+				}
+			case "derivative":
+				if vnew_ok && vold_ok && timeDiff > 0 {
+					value = float64(vnew-vold) / timeDiff
+					if value.(float64) < 0.0 {
+						value = 0.0
+					}
+					value_ok = true
+				} else if vold_ok {
+					// if the difference is not computable, return 0
+					value = 0.0
+					value_ok = true
+				}
+			}
+			if value_ok {
+				y, err := lp.NewMetric(metric.name, m.tags, m.meta, value, timestamp)
+				if err == nil {
+					if len(metric.unit) > 0 {
+						y.AddMeta("unit", metric.unit)
+					}
 					output <- y
 				}
+			} else {
+				// the value could not be computed correctly
+				cclog.ComponentWarn(m.name, fmt.Sprintf("Read(): Could not compute value for filesystem %s of metric %s: vold_ok = %t, vnew_ok = %t", filesystem, metric.name, vold_ok, vnew_ok))
 			}
 		}

-		// bytes written
-		bytesWritten, err := strconv.ParseInt(key_value["_bw_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert bytes written '%s' to int64: %v", key_value["_bw_"], err))
-			continue
+		// Save new state, if it contains proper values
+		if len(newstate) > 0 {
+			m.lastState[filesystem] = newstate
+			m.lastTimestamp[filesystem] = timestamp
 		}
-		if y, err :=
-			lp.NewMessage(
-				"gpfs_bytes_written",
-				m.tags,
-				m.meta,
-				map[string]interface{}{
-					"value": bytesWritten,
-				},
-				timestamp,
-			); err == nil {
-			y.AddMeta("unit", "bytes")
-			output <- y
-		}
-		if m.config.SendBandwidths {
-			if lastBytesWritten := m.lastState[filesystem].bytesWritten; lastBytesWritten >= 0 {
-				bwWrite := float64(bytesWritten-lastBytesWritten) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_bw_write",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": bwWrite,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "bytes/sec")
-					output <- y
-				}
-			}
-		}
-
-		// number of opens
-		numOpens, err := strconv.ParseInt(key_value["_oc_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of opens '%s' to int64: %v", key_value["_oc_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_opens", m.tags, m.meta, map[string]interface{}{"value": numOpens}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumOpens := m.lastState[filesystem].numOpens; lastNumOpens >= 0 {
-				opensRate := float64(numOpens-lastNumOpens) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_opens_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": opensRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// number of closes
-		numCloses, err := strconv.ParseInt(key_value["_cc_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of closes: '%s' to int64: %v", key_value["_cc_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_closes", m.tags, m.meta, map[string]interface{}{"value": numCloses}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumCloses := m.lastState[filesystem].numCloses; lastNumCloses >= 0 {
-				closesRate := float64(numCloses-lastNumCloses) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_closes_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": closesRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// number of reads
-		numReads, err := strconv.ParseInt(key_value["_rdc_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of reads: '%s' to int64: %v", key_value["_rdc_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_reads", m.tags, m.meta, map[string]interface{}{"value": numReads}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumReads := m.lastState[filesystem].numReads; lastNumReads >= 0 {
-				readsRate := float64(numReads-lastNumReads) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_reads_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": readsRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// number of writes
-		numWrites, err := strconv.ParseInt(key_value["_wc_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of writes: '%s' to int64: %v", key_value["_wc_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_writes", m.tags, m.meta, map[string]interface{}{"value": numWrites}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumWrites := m.lastState[filesystem].numWrites; lastNumWrites >= 0 {
-				writesRate := float64(numWrites-lastNumWrites) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_writes_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": writesRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// number of read directories
-		numReaddirs, err := strconv.ParseInt(key_value["_dir_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of read directories: '%s' to int64: %v", key_value["_dir_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_readdirs", m.tags, m.meta, map[string]interface{}{"value": numReaddirs}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumReaddirs := m.lastState[filesystem].numReaddirs; lastNumReaddirs >= 0 {
-				readdirsRate := float64(numReaddirs-lastNumReaddirs) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_readdirs_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": readdirsRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// Number of inode updates
-		numInodeUpdates, err := strconv.ParseInt(key_value["_iu_"], 10, 64)
-		if err != nil {
-			cclog.ComponentError(
-				m.name,
-				fmt.Sprintf("Read(): Failed to convert number of inode updates: '%s' to int: %v", key_value["_iu_"], err))
-			continue
-		}
-		if y, err := lp.NewMessage("gpfs_num_inode_updates", m.tags, m.meta, map[string]interface{}{"value": numInodeUpdates}, timestamp); err == nil {
-			output <- y
-		}
-		if m.config.SendDerivedValues {
-			if lastNumInodeUpdates := m.lastState[filesystem].numInodeUpdates; lastNumInodeUpdates >= 0 {
-				inodeUpdatesRate := float64(numInodeUpdates-lastNumInodeUpdates) / timeDiff
-				if y, err :=
-					lp.NewMessage(
-						"gpfs_inode_updates_rate",
-						m.tags,
-						m.meta,
-						map[string]interface{}{
-							"value": inodeUpdatesRate,
-						},
-						timestamp,
-					); err == nil {
-					y.AddMeta("unit", "requests/sec")
-					output <- y
-				}
-			}
-		}
-
-		// Total values
-		bytesTotal := int64(-1);
-		iops := int64(-1);
-		metaops := int64(-1);
-		if m.config.SendTotalValues {
-			bytesTotal = bytesRead + bytesWritten
-			if y, err :=
-				lp.NewMessage("gpfs_bytes_total",
-					m.tags,
-					m.meta,
-					map[string]interface{}{
-						"value": bytesTotal,
-					},
-					timestamp,
-				); err == nil {
-				y.AddMeta("unit", "bytes")
-				output <- y
-			}
-			if m.config.SendBandwidths {
-				if lastBytesTotal := m.lastState[filesystem].bytesTotal; lastBytesTotal >= 0 {
-					bwTotal := float64(bytesTotal-lastBytesTotal) / timeDiff
-					if y, err :=
-						lp.NewMessage(
-							"gpfs_bw_total",
-							m.tags,
-							m.meta,
-							map[string]interface{}{
-								"value": bwTotal,
-							},
-							timestamp,
-						); err == nil {
-						y.AddMeta("unit", "bytes/sec")
-						output <- y
-					}
-				}
-			}
-
-			iops = numReads + numWrites
-			if y, err :=
-				lp.NewMessage("gpfs_iops",
-					m.tags,
-					m.meta,
-					map[string]interface{}{
-						"value": iops,
-					},
-					timestamp,
-				); err == nil {
-				output <- y
-			}
-			if m.config.SendDerivedValues {
-				if lastIops := m.lastState[filesystem].iops; lastIops >= 0 {
-					iopsRate := float64(iops-lastIops) / timeDiff
-					if y, err :=
-						lp.NewMessage(
-							"gpfs_iops_rate",
-							m.tags,
-							m.meta,
-							map[string]interface{}{
-								"value": iopsRate,
-							},
-							timestamp,
-						); err == nil {
-						y.AddMeta("unit", "requests/sec")
-						output <- y
-					}
-				}
-			}
-	
-			metaops = numInodeUpdates + numCloses + numOpens + numReaddirs
-			if y, err :=
-				lp.NewMessage("gpfs_metaops",
-					m.tags,
-					m.meta,
-					map[string]interface{}{
-						"value": metaops,
-					},
-					timestamp,
-				); err == nil {
-				output <- y
-			}
-			if m.config.SendDerivedValues {
-				if lastMetaops := m.lastState[filesystem].metaops; lastMetaops >= 0 {
-					metaopsRate := float64(metaops-lastMetaops) / timeDiff
-					if y, err :=
-						lp.NewMessage(
-							"gpfs_metaops_rate",
-							m.tags,
-							m.meta,
-							map[string]interface{}{
-								"value": metaopsRate,
-							},
-							timestamp,
-						); err == nil {
-						y.AddMeta("unit", "requests/sec")
-						output <- y
-					}
-				}
-			}
-		}
-
-		// Save last state
-		m.lastState[filesystem] = GpfsCollectorLastState{
-			bytesRead:    bytesRead,
-			bytesWritten: bytesWritten,
-			numOpens: numOpens,
-			numCloses: numCloses,
-			numReads: numReads,
-			numWrites: numWrites,
-			numReaddirs: numReaddirs,
-			numInodeUpdates: numInodeUpdates,
-			bytesTotal: bytesTotal,
-			iops: iops,
-			metaops: metaops,
-		}
-
 	}
 }

--- a/collectors/gpfsMetric.md
+++ b/collectors/gpfsMetric.md
@@ -18,9 +18,14 @@ hugo_path: docs/reference/cc-metric-collector/collectors/gpfs.md
    "exclude_filesystem": [
      "fs1"
    ],
-    "send_bandwidths": true,
+    "exclude_metrics": [
+      "gpfs_bytes_written"
+    ],
+    "send_abs_values": true,
+    "send_diff_values": true,
+    "send_derived_values": true,
    "send_total_values": true,
-    "send_derived_values": true
+    "send_bandwidths": true
  }
 ```

@@ -29,38 +34,50 @@ GPFS / IBM Spectrum Scale filesystems.

 The reported filesystems can be filtered with the `exclude_filesystem` option
 in the configuration.
+Individual metrics can be disabled for reporting using option `exclude_metrics`.

 The path to the `mmpmon` command can be configured with the `mmpmon_path` option
 in the configuration. If nothing is set, the collector searches in `$PATH` for `mmpmon`.

-If cc-metric-collector is run as non-root, `sudo` can be enabled with `use_sudo`. 
+If cc-metric-collector is run as non-root, password-less `sudo` can be enabled with `use_sudo`. 
 Because `mmpmon` is by default only executable as root, the Go procedure to
 search for it in `$PATH` will fail. If you use `sudo`, you must specify the
 complete path for `mmpmon` using the parameter `mmpmon_path`.


 Metrics:
-* `gpfs_bytes_read`
-* `gpfs_bytes_written`
-* `gpfs_num_opens`
-* `gpfs_num_closes`
-* `gpfs_num_reads`
-* `gpfs_num_writes`
-* `gpfs_num_readdirs`
-* `gpfs_num_inode_updates`
+* `gpfs_bytes_read` (if `send_abs_values == true`)
+* `gpfs_bytes_written` (if `send_abs_values == true`)
+* `gpfs_num_opens` (if `send_abs_values == true`)
+* `gpfs_num_closes` (if `send_abs_values == true`)
+* `gpfs_num_reads` (if `send_abs_values == true`)
+* `gpfs_num_writes` (if `send_abs_values == true`)
+* `gpfs_num_readdirs` (if `send_abs_values == true`)
+* `gpfs_num_inode_updates` (if `send_abs_values == true`)
+* `gpfs_bytes_read_diff` (if `send_diff_values == true`)
+* `gpfs_bytes_written_diff` (if `send_diff_values == true`)
+* `gpfs_num_opens_diff` (if `send_diff_values == true`)
+* `gpfs_num_closes_diff` (if `send_diff_values == true`)
+* `gpfs_num_reads_diff` (if `send_diff_values == true`)
+* `gpfs_num_writes_diff` (if `send_diff_values == true`)
+* `gpfs_num_readdirs_diff` (if `send_diff_values == true`)
+* `gpfs_num_inode_updates_diff` (if `send_diff_values == true`)
+* `gpfs_bw_read` (if `send_derived_values == true` or `send_bandwidths == true`)
+* `gpfs_bw_write` (if `send_derived_values == true` or `send_bandwidths == true`)
 * `gpfs_opens_rate` (if `send_derived_values == true`)
 * `gpfs_closes_rate` (if `send_derived_values == true`)
 * `gpfs_reads_rate` (if `send_derived_values == true`)
 * `gpfs_writes_rate` (if `send_derived_values == true`)
 * `gpfs_readdirs_rate` (if `send_derived_values == true`)
 * `gpfs_inode_updates_rate` (if `send_derived_values == true`)
-* `gpfs_bytes_total = gpfs_bytes_read + gpfs_bytes_written` (if `send_total_values == true`)
-* `gpfs_iops = gpfs_num_reads + gpfs_num_writes` (if `send_total_values == true`)
+* `gpfs_bytes_total = gpfs_bytes_read + gpfs_bytes_written` (if `send_total_values == true` and `send_abs_values == true`)
+* `gpfs_bytes_total_diff` (if `send_total_values == true` and `send_diff_values == true`)
+* `gpfs_bw_total` ((if `send_total_values == true` and `send_derived_values == true`) or `send_bandwidths == true`)
+* `gpfs_iops = gpfs_num_reads + gpfs_num_writes` (if `send_total_values == true` and `send_abs_values == true`)
+* `gpfs_iops_diff` (if `send_total_values == true` and `send_diff_values == true`)
 * `gpfs_iops_rate` (if `send_total_values == true` and `send_derived_values == true`)
-* `gpfs_metaops = gpfs_num_inode_updates + gpfs_num_closes + gpfs_num_opens + gpfs_num_readdirs` (if `send_total_values == true`)
+* `gpfs_metaops = gpfs_num_inode_updates + gpfs_num_closes + gpfs_num_opens + gpfs_num_readdirs` (if `send_total_values == true` and `send_abs_values == true`)
+* `gpfs_metaops_diff` (if `send_total_values == true` and `send_diff_values == true`)
 * `gpfs_metaops_rate` (if `send_total_values == true` and `send_derived_values == true`)
-* `gpfs_bw_read` (if `send_bandwidths == true`)
-* `gpfs_bw_write` (if `send_bandwidths == true`)
-* `gpfs_bw_total` (if `send_bandwidths == true` and `send_total_values == true`)

 The collector adds a `filesystem` tag to all metrics
--- a/collectors/infinibandMetric.go
+++ b/collectors/infinibandMetric.go
@@ -10,9 +10,10 @@ package collectors
 import (
 	"fmt"
 	"os"
+	"slices"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	"golang.org/x/sys/unix"

 	"encoding/json"
@@ -65,7 +66,9 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {

 	var err error
 	m.name = "InfinibandCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
@@ -87,10 +90,10 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 	globPattern := filepath.Join(IB_BASEPATH, "*", "ports", "*")
 	ibDirs, err := filepath.Glob(globPattern)
 	if err != nil {
-		return fmt.Errorf("unable to glob files with pattern %s: %v", globPattern, err)
+		return fmt.Errorf("%s Init(): unable to glob files with pattern %s: %w", m.name, globPattern, err)
 	}
 	if ibDirs == nil {
-		return fmt.Errorf("unable to find any directories with pattern %s", globPattern)
+		return fmt.Errorf("%s Init(): unable to find any directories with pattern %s", m.name, globPattern)
 	}

 	for _, path := range ibDirs {
@@ -111,14 +114,7 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 		port := pathSplit[6]

 		// Skip excluded devices
-		skip := false
-		for _, excludedDevice := range m.config.ExcludeDevices {
-			if excludedDevice == device {
-				skip = true
-				break
-			}
-		}
-		if skip {
+		if slices.Contains(m.config.ExcludeDevices, device) {
 			continue
 		}

@@ -161,7 +157,7 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 		for _, counter := range portCounterFiles {
 			err := unix.Access(counter.path, unix.R_OK)
 			if err != nil {
-				return fmt.Errorf("unable to access %s: %v", counter.path, err)
+				return fmt.Errorf("%s Init(): unable to access %s: %w", m.name, counter.path, err)
 			}
 		}

@@ -181,7 +177,7 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 	}

 	if len(m.info) == 0 {
-		return fmt.Errorf("found no IB devices")
+		return fmt.Errorf("%s Init(): found no IB devices", m.name)
 	}

 	m.init = true
@@ -241,7 +237,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMess
 						counterDef.name,
 						info.tagSet,
 						m.meta,
-						map[string]interface{}{
+						map[string]any{
 							"value": counterDef.currentState,
 						},
 						now); err == nil {
@@ -259,7 +255,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMess
 							counterDef.name+"_bw",
 							info.tagSet,
 							m.meta,
-							map[string]interface{}{
+							map[string]any{
 								"value": rate,
 							},
 							now); err == nil {
@@ -289,7 +285,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMess
 					"ib_total",
 					info.tagSet,
 					m.meta,
-					map[string]interface{}{
+					map[string]any{
 						"value": ib_total,
 					},
 					now); err == nil {
@@ -302,7 +298,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMess
 					"ib_total_pkts",
 					info.tagSet,
 					m.meta,
-					map[string]interface{}{
+					map[string]any{
 						"value": ib_total_pkts,
 					},
 					now); err == nil {
--- a/collectors/iostatMetric.go
+++ b/collectors/iostatMetric.go
@@ -11,25 +11,26 @@ import (
 	"bufio"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"os"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

-// Konstante für den Pfad zu /proc/diskstats
 const IOSTATFILE = `/proc/diskstats`

 type IOstatCollectorConfig struct {
 	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
-	// Neues Feld zum Ausschließen von Devices per JSON-Konfiguration
 	ExcludeDevices []string `json:"exclude_devices,omitempty"`
 }

 type IOstatCollectorEntry struct {
+	currentValues map[string]int64
 	lastValues    map[string]int64
 	tags          map[string]string
 }
@@ -46,7 +47,9 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 	m.name = "IOstatCollector"
 	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Disk"}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -76,7 +79,7 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 	m.devices = make(map[string]IOstatCollectorEntry)
 	m.matches = make(map[string]int)
 	for k, v := range matches {
-		if _, skip := stringArrayContains(m.config.ExcludeMetrics, k); !skip {
+		if !slices.Contains(m.config.ExcludeMetrics, k) {
 			m.matches[k] = v
 		}
 	}
@@ -85,10 +88,8 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 	}
 	file, err := os.Open(IOSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
-		return err
+		return fmt.Errorf("%s Init(): Failed to open file \"%s\": %w", m.name, IOSTATFILE, err)
 	}
-	defer file.Close()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -102,21 +103,36 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 		if strings.Contains(device, "loop") {
 			continue
 		}
-		if _, skip := stringArrayContains(m.config.ExcludeDevices, device); skip {
+		if slices.Contains(m.config.ExcludeDevices, device) {
 			continue
 		}
-		values := make(map[string]int64)
+		currentValues := make(map[string]int64)
+		lastValues := make(map[string]int64)
 		for m := range m.matches {
-			values[m] = 0
+			currentValues[m] = 0
+			lastValues[m] = 0
+		}
+		for name, idx := range m.matches {
+			if idx < len(linefields) {
+				if value, err := strconv.ParseInt(linefields[idx], 0, 64); err == nil {
+					currentValues[name] = value
+					lastValues[name] = value // Set last to current for first read
+				}
+			}
 		}
 		m.devices[device] = IOstatCollectorEntry{
 			tags: map[string]string{
 				"device": device,
 				"type":   "node",
 			},
-			lastValues: values,
+			currentValues: currentValues,
+			lastValues:    lastValues,
 		}
 	}
+	if err := file.Close(); err != nil {
+		return fmt.Errorf("%s Init(): Failed to close file \"%s\": %w", m.name, IOSTATFILE, err)
+	}
+
 	m.init = true
 	return err
 }
@@ -128,10 +144,18 @@ func (m *IOstatCollector) Read(interval time.Duration, output chan lp.CCMessage)

 	file, err := os.Open(IOSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", IOSTATFILE, err))
 		return
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", IOSTATFILE, err))
+		}
+	}()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -147,24 +171,28 @@ func (m *IOstatCollector) Read(interval time.Duration, output chan lp.CCMessage)
 		if strings.Contains(device, "loop") {
 			continue
 		}
-		if _, skip := stringArrayContains(m.config.ExcludeDevices, device); skip {
+		if slices.Contains(m.config.ExcludeDevices, device) {
 			continue
 		}
 		if _, ok := m.devices[device]; !ok {
 			continue
 		}
+		// Update current and last values
 		entry := m.devices[device]
 		for name, idx := range m.matches {
 			if idx < len(linefields) {
 				x, err := strconv.ParseInt(linefields[idx], 0, 64)
 				if err == nil {
-					diff := x - entry.lastValues[name]
-					y, err := lp.NewMessage(name, entry.tags, m.meta, map[string]interface{}{"value": int(diff)}, time.Now())
+					// Calculate difference using previous current and new value
+					diff := x - entry.currentValues[name]
+					y, err := lp.NewMetric(name, entry.tags, m.meta, int(diff), time.Now())
 					if err == nil {
 						output <- y
 					}
+					// Update last to previous current, and current to new value
+					entry.lastValues[name] = entry.currentValues[name]
+					entry.currentValues[name] = x
 				}
-				entry.lastValues[name] = x
 			}
 		}
 		m.devices[device] = entry
--- a/collectors/ipmiMetric.go
+++ b/collectors/ipmiMetric.go
@@ -14,14 +14,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"os/exec"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const IPMISENSORS_PATH = `ipmi-sensors`
@@ -44,7 +43,9 @@ func (m *IpmiCollector) Init(config json.RawMessage) error {
 	}

 	m.name = "IpmiCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
@@ -116,19 +117,20 @@ func (m *IpmiCollector) readIpmiTool(cmd string, output chan lp.CCMessage) {
 		}
 		v, err := strconv.ParseFloat(strings.TrimSpace(lv[1]), 64)
 		if err == nil {
-			name := strings.ToLower(strings.Replace(strings.TrimSpace(lv[0]), " ", "_", -1))
+			name := strings.ToLower(strings.ReplaceAll(strings.TrimSpace(lv[0]), " ", "_"))
 			unit := strings.TrimSpace(lv[2])
-			if unit == "Volts" {
+			switch unit {
+			case "Volts":
 				unit = "Volts"
-			} else if unit == "degrees C" {
+			case "degrees C":
 				unit = "degC"
-			} else if unit == "degrees F" {
+			case "degrees F":
 				unit = "degF"
-			} else if unit == "Watts" {
+			case "Watts":
 				unit = "Watts"
 			}

-			y, err := lp.NewMessage(name, map[string]string{"type": "node"}, m.meta, map[string]interface{}{"value": v}, time.Now())
+			y, err := lp.NewMessage(name, map[string]string{"type": "node"}, m.meta, map[string]any{"value": v}, time.Now())
 			if err == nil {
 				y.AddMeta("unit", unit)
 				output <- y
@@ -150,23 +152,30 @@ func (m *IpmiCollector) readIpmiTool(cmd string, output chan lp.CCMessage) {

 func (m *IpmiCollector) readIpmiSensors(cmd string, output chan lp.CCMessage) {

+	// Setup ipmisensors command
 	command := exec.Command(cmd, "--comma-separated-output", "--sdr-cache-recreate")
-	command.Wait()
-	stdout, err := command.Output()
-	if err != nil {
-		log.Print(err)
+	stdout, _ := command.StdoutPipe()
+	errBuf := new(bytes.Buffer)
+	command.Stderr = errBuf
+
+	// start command
+	if err := command.Start(); err != nil {
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("readIpmiSensors(): Failed to start command \"%s\": %v", command.String(), err),
+		)
 		return
 	}

-	ll := strings.Split(string(stdout), "\n")
-
-	for _, line := range ll {
-		lv := strings.Split(line, ",")
+	// Read command output
+	scanner := bufio.NewScanner(stdout)
+	for scanner.Scan() {
+		lv := strings.Split(scanner.Text(), ",")
 		if len(lv) > 3 {
 			v, err := strconv.ParseFloat(lv[3], 64)
 			if err == nil {
-				name := strings.ToLower(strings.Replace(lv[1], " ", "_", -1))
-				y, err := lp.NewMessage(name, map[string]string{"type": "node"}, m.meta, map[string]interface{}{"value": v}, time.Now())
+				name := strings.ToLower(strings.ReplaceAll(lv[1], " ", "_"))
+				y, err := lp.NewMessage(name, map[string]string{"type": "node"}, m.meta, map[string]any{"value": v}, time.Now())
 				if err == nil {
 					if len(lv) > 4 {
 						y.AddMeta("unit", lv[4])
@@ -176,6 +185,18 @@ func (m *IpmiCollector) readIpmiSensors(cmd string, output chan lp.CCMessage) {
 			}
 		}
 	}
+
+	// Wait for command end
+	if err := command.Wait(); err != nil {
+		errMsg, _ := io.ReadAll(errBuf)
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("readIpmiSensors(): Failed to wait for the end of command \"%s\": %v\n", command.String(), err),
+		)
+		cclog.ComponentError(m.name, fmt.Sprintf("readIpmiSensors(): command stderr: \"%s\"\n", strings.TrimSpace(string(errMsg))))
+		return
+	}
+
 }

 func (m *IpmiCollector) Read(interval time.Duration, output chan lp.CCMessage) {
--- a/collectors/likwidMetric.go
+++ b/collectors/likwidMetric.go
@@ -19,11 +19,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"maps"
 	"math"
 	"os"
 	"os/signal"
 	"os/user"
-	"sort"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -31,8 +32,8 @@ import (
 	"time"
 	"unsafe"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"github.com/NVIDIA/go-nvml/pkg/dl"
@@ -124,22 +125,14 @@ func checkMetricType(t string) bool {
 	return ok
 }

-func eventsToEventStr(events map[string]string) string {
-	elist := make([]string, 0)
-	for k, v := range events {
-		elist = append(elist, fmt.Sprintf("%s:%s", v, k))
-	}
-	return strings.Join(elist, ",")
-}
-
 func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig {
-	tmplist := make([]string, 0)
-	clist := make([]string, 0)
+	clist := make([]string, 0, len(input.Events))
 	for k := range input.Events {
 		clist = append(clist, k)
 	}
-	sort.Strings(clist)
-	elist := make([]*C.char, 0)
+	slices.Sort(clist)
+	tmplist := make([]string, 0, len(clist))
+	elist := make([]*C.char, 0, len(clist))
 	for _, k := range clist {
 		v := input.Events[k]
 		tmplist = append(tmplist, fmt.Sprintf("%s:%s", v, k))
@@ -187,7 +180,7 @@ func getBaseFreq() float64 {
 	for _, f := range files {
 		buffer, err := os.ReadFile(f)
 		if err == nil {
-			data := strings.Replace(string(buffer), "\n", "", -1)
+			data := strings.ReplaceAll(string(buffer), "\n", "")
 			x, err := strconv.ParseInt(data, 0, 64)
 			if err == nil {
 				freq = float64(x)
@@ -216,7 +209,7 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
-			return err
+			return fmt.Errorf("%s Init(): failed to unmarshal JSON config: %w", m.name, err)
 		}
 	}
 	lib := dl.New(m.config.LibraryPath, LIKWID_LIB_DL_FLAGS)
@@ -225,14 +218,18 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	}
 	err := lib.Open()
 	if err != nil {
-		return fmt.Errorf("error opening %s: %v", m.config.LibraryPath, err)
+		return fmt.Errorf("error opening %s: %w", m.config.LibraryPath, err)
 	}

 	if m.config.ForceOverwrite {
 		cclog.ComponentDebug(m.name, "Set LIKWID_FORCE=1")
-		os.Setenv("LIKWID_FORCE", "1")
+		if err := os.Setenv("LIKWID_FORCE", "1"); err != nil {
+			return fmt.Errorf("error setting environment variable LIKWID_FORCE=1: %w", err)
+		}
+	}
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
 	}
-	m.setup()

 	m.meta = map[string]string{"group": "PerfCounter"}
 	cclog.ComponentDebug(m.name, "Get cpulist and init maps and lists")
@@ -316,7 +313,14 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	case "accessdaemon":
 		if len(m.config.DaemonPath) > 0 {
 			p := os.Getenv("PATH")
-			os.Setenv("PATH", m.config.DaemonPath+":"+p)
+			if len(p) > 0 {
+				p = m.config.DaemonPath + ":" + p
+			} else {
+				p = m.config.DaemonPath
+			}
+			if err := os.Setenv("PATH", p); err != nil {
+				return fmt.Errorf("error setting environment variable PATH=%s: %w", p, err)
+			}
 		}
 		C.HPMmode(1)
 		retCode := C.HPMinit()
@@ -369,16 +373,23 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 // take a measurement for 'interval' seconds of event set index 'group'
 func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig, interval time.Duration) (bool, error) {
 	var ret C.int
-	var gid C.int = -1
 	sigchan := make(chan os.Signal, 1)

 	// Watch changes for the lock file ()
 	watcher, err := fsnotify.NewWatcher()
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("takeMeasurement(): Failed to create a new fsnotify.Watcher: %v", err))
 		return true, err
 	}
-	defer watcher.Close()
+	defer func() {
+		if err := watcher.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("takeMeasurement(): Failed to close fsnotify.Watcher: %v", err))
+		}
+	}()
 	if len(m.config.LockfilePath) > 0 {
 		// Check if the lock file exists
 		info, err := os.Stat(m.config.LockfilePath)
@@ -386,9 +397,11 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
 			// Create the lock file if it does not exist
 			file, createErr := os.Create(m.config.LockfilePath)
 			if createErr != nil {
-				return true, fmt.Errorf("failed to create lock file: %v", createErr)
+				return true, fmt.Errorf("failed to create lock file: %w", createErr)
+			}
+			if err := file.Close(); err != nil {
+				return true, fmt.Errorf("failed to close lock file: %w", err)
 			}
-			file.Close()
 			info, err = os.Stat(m.config.LockfilePath) // Recheck the file after creation
 		}
 		if err != nil {
@@ -440,6 +453,7 @@ func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig,
 	signal.Notify(sigchan, syscall.SIGCHLD)

 	// Add an event string to LIKWID
+	var gid C.int
 	select {
 	case <-sigchan:
 		gid = -1
@@ -595,7 +609,6 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 				evset.metrics[tid][metric.Name] = value
 				// Now we have the result, send it with the proper tags
 				if !math.IsNaN(value) && metric.Publish {
-					fields := map[string]interface{}{"value": value}
 					y, err :=
 						lp.NewMessage(
 							metric.Name,
@@ -603,12 +616,14 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 								"type": metric.Type,
 							},
 							m.meta,
-							fields,
+							map[string]any{
+								"value": value,
+							},
 							now,
 						)
 					if err == nil {
 						if metric.Type != "node" {
-							y.AddTag("type-id", fmt.Sprintf("%d", domain))
+							y.AddTag("type-id", strconv.Itoa(domain))
 						}
 						if len(metric.Unit) > 0 {
 							y.AddMeta("unit", metric.Unit)
@@ -638,10 +653,10 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 						metric.Name,
 						map[string]string{
 							"type":    "core",
-							"type-id": fmt.Sprintf("%d", coreID),
+							"type-id": strconv.Itoa(coreID),
 						},
 						m.meta,
-						map[string]interface{}{
+						map[string]any{
 							"value": value,
 						},
 						now,
@@ -675,10 +690,10 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 						metric.Name,
 						map[string]string{
 							"type":    "socket",
-							"type-id": fmt.Sprintf("%d", socketID),
+							"type-id": strconv.Itoa(socketID),
 						},
 						m.meta,
-						map[string]interface{}{
+						map[string]any{
 							"value": value,
 						},
 						now,
@@ -712,7 +727,7 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 						"type": "node",
 					},
 					m.meta,
-					map[string]interface{}{
+					map[string]any{
 						"value": totalNodeValue,
 					},
 					now,
@@ -748,9 +763,7 @@ func (m *LikwidCollector) calcGlobalMetrics(groups []LikwidEventsetConfig, inter
 				// Here we generate parameter list
 				params := make(map[string]float64)
 				for _, evset := range groups {
-					for mname, mres := range evset.metrics[tid] {
-						params[mname] = mres
-					}
+					maps.Copy(params, evset.metrics[tid])
 				}
 				params["gotime"] = interval.Seconds()
 				// Evaluate the metric
@@ -772,14 +785,14 @@ func (m *LikwidCollector) calcGlobalMetrics(groups []LikwidEventsetConfig, inter
 									"type": metric.Type,
 								},
 								m.meta,
-								map[string]interface{}{
+								map[string]any{
 									"value": value,
 								},
 								now,
 							)
 						if err == nil {
 							if metric.Type != "node" {
-								y.AddTag("type-id", fmt.Sprintf("%d", domain))
+								y.AddTag("type-id", strconv.Itoa(domain))
 							}
 							if len(metric.Unit) > 0 {
 								y.AddMeta("unit", metric.Unit)
@@ -795,7 +808,7 @@ func (m *LikwidCollector) calcGlobalMetrics(groups []LikwidEventsetConfig, inter
 }

 func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMessage) {
-	var err error = nil
+	var err error
 	groups := make([]LikwidEventsetConfig, 0)

 	for evidx, evset := range m.config.Eventsets {
@@ -813,13 +826,21 @@ func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMe

 		if !skip {
 			// read measurements and derive event set metrics
-			m.calcEventsetMetrics(e, interval, output)
+			err = m.calcEventsetMetrics(e, interval, output)
+			if err != nil {
+				cclog.ComponentError(m.name, err.Error())
+				return
+			}
 			groups = append(groups, e)
 		}
 	}
 	if len(groups) > 0 {
 		// calculate global metrics
-		m.calcGlobalMetrics(groups, interval, output)
+		err = m.calcGlobalMetrics(groups, interval, output)
+		if err != nil {
+			cclog.ComponentError(m.name, err.Error())
+			return
+		}
 	}
 }

--- a/collectors/loadavgMetric.go
+++ b/collectors/loadavgMetric.go
@@ -11,12 +11,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // LoadavgCollector collects:
@@ -42,7 +43,9 @@ type LoadavgCollector struct {
 func (m *LoadavgCollector) Init(config json.RawMessage) error {
 	m.name = "LoadavgCollector"
 	m.parallel = true
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -64,10 +67,10 @@ func (m *LoadavgCollector) Init(config json.RawMessage) error {
 	m.proc_skips = make([]bool, len(m.proc_matches))

 	for i, name := range m.load_matches {
-		_, m.load_skips[i] = stringArrayContains(m.config.ExcludeMetrics, name)
+		m.load_skips[i] = slices.Contains(m.config.ExcludeMetrics, name)
 	}
 	for i, name := range m.proc_matches {
-		_, m.proc_skips[i] = stringArrayContains(m.config.ExcludeMetrics, name)
+		m.proc_skips[i] = slices.Contains(m.config.ExcludeMetrics, name)
 	}
 	m.init = true
 	return nil
@@ -99,7 +102,7 @@ func (m *LoadavgCollector) Read(interval time.Duration, output chan lp.CCMessage
 		if m.load_skips[i] {
 			continue
 		}
-		y, err := lp.NewMessage(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
+		y, err := lp.NewMessage(name, m.tags, m.meta, map[string]any{"value": x}, now)
 		if err == nil {
 			output <- y
 		}
@@ -118,7 +121,7 @@ func (m *LoadavgCollector) Read(interval time.Duration, output chan lp.CCMessage
 		if m.proc_skips[i] {
 			continue
 		}
-		y, err := lp.NewMessage(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
+		y, err := lp.NewMessage(name, m.tags, m.meta, map[string]any{"value": x}, now)
 		if err == nil {
 			output <- y
 		}
--- a/collectors/lustreMetric.go
+++ b/collectors/lustreMetric.go
@@ -13,12 +13,13 @@ import (
 	"fmt"
 	"os/exec"
 	"os/user"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const LUSTRE_SYSFS = `/sys/fs/lustre`
@@ -61,7 +62,6 @@ func (m *LustreCollector) getDeviceDataCommand(device string) []string {
 	} else {
 		command = exec.Command(m.lctl, LCTL_OPTION, statsfile)
 	}
-	command.Wait()
 	stdout, _ := command.Output()
 	return strings.Split(string(stdout), "\n")
 }
@@ -302,7 +302,9 @@ func (m *LustreCollector) Init(config json.RawMessage) error {
 			return err
 		}
 	}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.tags = map[string]string{"type": "node"}
 	m.meta = map[string]string{"source": m.name, "group": "Lustre"}

@@ -339,21 +341,21 @@ func (m *LustreCollector) Init(config json.RawMessage) error {
 	m.definitions = []LustreMetricDefinition{}
 	if m.config.SendAbsoluteValues {
 		for _, def := range LustreAbsMetrics {
-			if _, skip := stringArrayContains(m.config.ExcludeMetrics, def.name); !skip {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
 				m.definitions = append(m.definitions, def)
 			}
 		}
 	}
 	if m.config.SendDiffValues {
 		for _, def := range LustreDiffMetrics {
-			if _, skip := stringArrayContains(m.config.ExcludeMetrics, def.name); !skip {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
 				m.definitions = append(m.definitions, def)
 			}
 		}
 	}
 	if m.config.SendDerivedValues {
 		for _, def := range LustreDeriveMetrics {
-			if _, skip := stringArrayContains(m.config.ExcludeMetrics, def.name); !skip {
+			if !slices.Contains(m.config.ExcludeMetrics, def.name) {
 				m.definitions = append(m.definitions, def)
 			}
 		}
@@ -402,23 +404,23 @@ func (m *LustreCollector) Read(interval time.Duration, output chan lp.CCMessage)
 			} else {
 				use_x = devData[def.name]
 			}
-			var value interface{}
+			var value any
 			switch def.calc {
 			case "none":
 				value = use_x
-				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]any{"value": value}, time.Now())
 			case "difference":
 				value = use_x - devData[def.name]
 				if value.(int64) < 0 {
 					value = 0
 				}
-				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]any{"value": value}, time.Now())
 			case "derivative":
 				value = float64(use_x-devData[def.name]) / tdiff.Seconds()
 				if value.(float64) < 0 {
 					value = 0
 				}
-				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+				y, err = lp.NewMessage(def.name, m.tags, m.meta, map[string]any{"value": value}, time.Now())
 			}
 			if err == nil {
 				y.AddTag("device", device)
--- a/collectors/memstatMetric.go
+++ b/collectors/memstatMetric.go
@@ -15,12 +15,13 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const MEMSTATFILE = "/proc/meminfo"
@@ -58,7 +59,11 @@ func getStats(filename string) map[string]MemstatStats {
 	if err != nil {
 		cclog.Error(err.Error())
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.Error(err.Error())
+		}
+	}()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -115,19 +120,20 @@ func (m *MemstatCollector) Init(config json.RawMessage) error {
 		"MemShared":    "mem_shared",
 	}
 	for k, v := range matches {
-		_, skip := stringArrayContains(m.config.ExcludeMetrics, k)
-		if !skip {
+		if !slices.Contains(m.config.ExcludeMetrics, k) {
 			m.matches[k] = v
 		}
 	}
 	m.sendMemUsed = false
-	if _, skip := stringArrayContains(m.config.ExcludeMetrics, "mem_used"); !skip {
+	if !slices.Contains(m.config.ExcludeMetrics, "mem_used") {
 		m.sendMemUsed = true
 	}
 	if len(m.matches) == 0 {
 		return errors.New("no metrics to collect")
 	}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}

 	if m.config.NodeStats {
 		if stats := getStats(MEMSTATFILE); len(stats) == 0 {
@@ -153,7 +159,7 @@ func (m *MemstatCollector) Init(config json.RawMessage) error {
 							file: f,
 							tags: map[string]string{
 								"type":    "memoryDomain",
-								"type-id": fmt.Sprintf("%d", id),
+								"type-id": strconv.Itoa(id),
 							},
 						}
 						m.nodefiles[id] = f
@@ -174,7 +180,7 @@ func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMessage
 	sendStats := func(stats map[string]MemstatStats, tags map[string]string) {
 		for match, name := range m.matches {
 			var value float64 = 0
-			var unit string = ""
+			unit := ""
 			if v, ok := stats[match]; ok {
 				value = v.value
 				if len(v.unit) > 0 {
@@ -182,7 +188,7 @@ func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMessage
 				}
 			}

-			y, err := lp.NewMessage(name, tags, m.meta, map[string]interface{}{"value": value}, time.Now())
+			y, err := lp.NewMessage(name, tags, m.meta, map[string]any{"value": value}, time.Now())
 			if err == nil {
 				if len(unit) > 0 {
 					y.AddMeta("unit", unit)
@@ -215,7 +221,7 @@ func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMessage
 					}
 				}
 			}
-			y, err := lp.NewMessage("mem_used", tags, m.meta, map[string]interface{}{"value": memUsed}, time.Now())
+			y, err := lp.NewMessage("mem_used", tags, m.meta, map[string]any{"value": memUsed}, time.Now())
 			if err == nil {
 				if len(unit) > 0 {
 					y.AddMeta("unit", unit)
--- a/collectors/metricCollector.go
+++ b/collectors/metricCollector.go
@@ -12,7 +12,7 @@ import (
 	"fmt"
 	"time"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 type MetricCollector interface {
@@ -51,30 +51,6 @@ func (c *metricCollector) Initialized() bool {
 	return c.init
 }

-// intArrayContains scans an array of ints if the value str is present in the array
-// If the specified value is found, the corresponding array index is returned.
-// The bool value is used to signal success or failure
-func intArrayContains(array []int, str int) (int, bool) {
-	for i, a := range array {
-		if a == str {
-			return i, true
-		}
-	}
-	return -1, false
-}
-
-// stringArrayContains scans an array of strings if the value str is present in the array
-// If the specified value is found, the corresponding array index is returned.
-// The bool value is used to signal success or failure
-func stringArrayContains(array []string, str string) (int, bool) {
-	for i, a := range array {
-		if a == str {
-			return i, true
-		}
-	}
-	return -1, false
-}
-
 // RemoveFromStringList removes the string r from the array of strings s
 // If r is not contained in the array an error is returned
 func RemoveFromStringList(s []string, r string) ([]string, error) {
--- a/collectors/netstatMetric.go
+++ b/collectors/netstatMetric.go
@@ -10,14 +10,15 @@ package collectors
 import (
 	"bufio"
 	"encoding/json"
-	"errors"
+	"fmt"
 	"os"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const NETSTATFILE = "/proc/net/dev"
@@ -65,7 +66,9 @@ func getCanonicalName(raw string, aliasToCanonical map[string]string) string {
 func (m *NetstatCollector) Init(config json.RawMessage) error {
 	m.name = "NetstatCollector"
 	m.parallel = true
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.lastTimestamp = time.Now()

 	const (
@@ -107,10 +110,8 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
 	// Check access to net statistic file
 	file, err := os.Open(NETSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
-		return err
+		return fmt.Errorf("%s Init(): failed to open netstat file \"%s\": %w", m.name, NETSTATFILE, err)
 	}
-	defer file.Close()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -129,7 +130,7 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
 		canonical := getCanonicalName(raw, m.aliasToCanonical)

 		// Check if device is a included device
-		if _, ok := stringArrayContains(m.config.IncludeDevices, canonical); ok {
+		if slices.Contains(m.config.IncludeDevices, canonical) {
 			// Tag will contain original device name (raw).
 			tags := map[string]string{"stype": "network", "stype-id": raw, "type": "node"}
 			meta_unit_byte := map[string]string{"source": m.name, "group": "Network", "unit": "bytes"}
@@ -174,8 +175,13 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {
 		}
 	}

+	// Close netstat file
+	if err := file.Close(); err != nil {
+		return fmt.Errorf("%s Init(): failed to close netstat file \"%s\": %w", m.name, NETSTATFILE, err)
+	}
+
 	if len(m.matches) == 0 {
-		return errors.New("no devices to collector metrics found")
+		return fmt.Errorf("%s Init(): no devices to collect metrics found", m.name)
 	}
 	m.init = true
 	return nil
@@ -194,10 +200,18 @@ func (m *NetstatCollector) Read(interval time.Duration, output chan lp.CCMessage

 	file, err := os.Open(NETSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", NETSTATFILE, err))
 		return
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", NETSTATFILE, err))
+		}
+	}()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -226,14 +240,14 @@ func (m *NetstatCollector) Read(interval time.Duration, output chan lp.CCMessage
 					continue
 				}
 				if m.config.SendAbsoluteValues {
-					if y, err := lp.NewMessage(metric.name, metric.tags, metric.meta, map[string]interface{}{"value": v}, now); err == nil {
+					if y, err := lp.NewMessage(metric.name, metric.tags, metric.meta, map[string]any{"value": v}, now); err == nil {
 						output <- y
 					}
 				}
 				if m.config.SendDerivedValues {
 					if metric.lastValue >= 0 {
 						rate := float64(v-metric.lastValue) / timeDiff
-						if y, err := lp.NewMessage(metric.name+"_bw", metric.tags, metric.meta_rates, map[string]interface{}{"value": rate}, now); err == nil {
+						if y, err := lp.NewMessage(metric.name+"_bw", metric.tags, metric.meta_rates, map[string]any{"value": rate}, now); err == nil {
 							output <- y
 						}
 					}
--- a/collectors/nfsMetric.go
+++ b/collectors/nfsMetric.go
@@ -10,7 +10,7 @@ package collectors
 import (
 	"encoding/json"
 	"fmt"
-	"log"
+	"slices"

 	//	"os"
 	"os/exec"
@@ -18,7 +18,8 @@ import (
 	"strings"
 	"time"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // First part contains the code for the general NfsCollector.
@@ -44,10 +45,15 @@ type nfsCollector struct {

 func (m *nfsCollector) initStats() error {
 	cmd := exec.Command(m.config.Nfsstats, `-l`, `--all`)
-	cmd.Wait()
+
+	// Wait for cmd end
+	if err := cmd.Wait(); err != nil {
+		return fmt.Errorf("%s initStats(): %w", m.name, err)
+	}
+
 	buffer, err := cmd.Output()
 	if err == nil {
-		for _, line := range strings.Split(string(buffer), "\n") {
+		for line := range strings.Lines(string(buffer)) {
 			lf := strings.Fields(line)
 			if len(lf) != 5 {
 				continue
@@ -71,10 +77,15 @@ func (m *nfsCollector) initStats() error {

 func (m *nfsCollector) updateStats() error {
 	cmd := exec.Command(m.config.Nfsstats, `-l`, `--all`)
-	cmd.Wait()
+
+	// Wait for cmd end
+	if err := cmd.Wait(); err != nil {
+		return fmt.Errorf("%s updateStats(): %w", m.name, err)
+	}
+
 	buffer, err := cmd.Output()
 	if err == nil {
-		for _, line := range strings.Split(string(buffer), "\n") {
+		for line := range strings.Lines(string(buffer)) {
 			lf := strings.Fields(line)
 			if len(lf) != 5 {
 				continue
@@ -102,8 +113,7 @@ func (m *nfsCollector) MainInit(config json.RawMessage) error {
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
-			log.Print(err.Error())
-			return err
+			return fmt.Errorf("%s Init(): failed to unmarshal JSON config: %w", m.name, err)
 		}
 	}
 	m.meta = map[string]string{
@@ -116,10 +126,12 @@ func (m *nfsCollector) MainInit(config json.RawMessage) error {
 	// Check if nfsstat is in executable search path
 	_, err := exec.LookPath(m.config.Nfsstats)
 	if err != nil {
-		return fmt.Errorf("NfsCollector.Init(): Failed to find nfsstat binary '%s': %v", m.config.Nfsstats, err)
+		return fmt.Errorf("%s Init(): Failed to find nfsstat binary '%s': %w", m.name, m.config.Nfsstats, err)
 	}
 	m.data = make(map[string]NfsCollectorData)
-	m.initStats()
+	if err := m.initStats(); err != nil {
+		return fmt.Errorf("%s Init(): %w", m.name, err)
+	}
 	m.init = true
 	m.parallel = true
 	return nil
@@ -131,8 +143,14 @@ func (m *nfsCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 	}
 	timestamp := time.Now()

-	m.updateStats()
-	prefix := ""
+	if err := m.updateStats(); err != nil {
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): updateStats() failed: %v", err),
+		)
+		return
+	}
+	var prefix string
 	switch m.version {
 	case "v3":
 		prefix = "nfs3"
@@ -143,11 +161,11 @@ func (m *nfsCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 	}

 	for name, data := range m.data {
-		if _, skip := stringArrayContains(m.config.ExcludeMetrics, name); skip {
+		if slices.Contains(m.config.ExcludeMetrics, name) {
 			continue
 		}
 		value := data.current - data.last
-		y, err := lp.NewMessage(fmt.Sprintf("%s_%s", prefix, name), m.tags, m.meta, map[string]interface{}{"value": value}, timestamp)
+		y, err := lp.NewMessage(fmt.Sprintf("%s_%s", prefix, name), m.tags, m.meta, map[string]any{"value": value}, timestamp)
 		if err == nil {
 			y.AddMeta("version", m.version)
 			output <- y
@@ -170,13 +188,17 @@ type Nfs4Collector struct {
 func (m *Nfs3Collector) Init(config json.RawMessage) error {
 	m.name = "Nfs3Collector"
 	m.version = `v3`
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	return m.MainInit(config)
 }

 func (m *Nfs4Collector) Init(config json.RawMessage) error {
 	m.name = "Nfs4Collector"
 	m.version = `v4`
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	return m.MainInit(config)
 }
--- a/collectors/nfsiostatMetric.go
+++ b/collectors/nfsiostatMetric.go
@@ -12,12 +12,13 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // These are the fields we read from the JSON configuration
@@ -71,7 +72,7 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
 		// Is this a device line with mount point, remote target and NFS version?
 		dev := resolve_regex_fields(l, deviceRegex)
 		if len(dev) > 0 {
-			if _, ok := stringArrayContains(m.config.ExcludeFilesystem, dev[m.key]); !ok {
+			if !slices.Contains(m.config.ExcludeFilesystem, dev[m.key]) {
 				current = dev
 				if len(current["version"]) == 0 {
 					current["version"] = "3"
@@ -85,7 +86,7 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
 			if len(bytes) > 0 {
 				data[current[m.key]] = make(map[string]int64)
 				for name, sval := range bytes {
-					if _, ok := stringArrayContains(m.config.ExcludeMetrics, name); !ok {
+					if !slices.Contains(m.config.ExcludeMetrics, name) {
 						val, err := strconv.ParseInt(sval, 10, 64)
 						if err == nil {
 							data[current[m.key]][name] = val
@@ -102,7 +103,9 @@ func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
 func (m *NfsIOStatCollector) Init(config json.RawMessage) error {
 	var err error = nil
 	m.name = "NfsIOStatCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "NFS", "unit": "bytes"}
 	m.tags = map[string]string{"type": "node"}
@@ -140,7 +143,13 @@ func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMessa
 		if old, ok := m.data[mntpoint]; ok {
 			for name, newVal := range values {
 				if m.config.SendAbsoluteValues {
-					msg, err := lp.NewMessage(fmt.Sprintf("nfsio_%s", name), m.tags, m.meta, map[string]interface{}{"value": newVal}, now)
+					msg, err := lp.NewMessage(
+						"nfsio_"+name,
+						m.tags,
+						m.meta,
+						map[string]any{
+							"value": newVal},
+						now)
 					if err == nil {
 						msg.AddTag("stype", "filesystem")
 						msg.AddTag("stype-id", mntpoint)
@@ -149,7 +158,7 @@ func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMessa
 				}
 				if m.config.SendDerivedValues {
 					rate := float64(newVal-old[name]) / timeDiff
-					msg, err := lp.NewMessage(fmt.Sprintf("nfsio_%s_bw", name), m.tags, m.meta, map[string]interface{}{"value": rate}, now)
+					msg, err := lp.NewMessage(fmt.Sprintf("nfsio_%s_bw", name), m.tags, m.meta, map[string]any{"value": rate}, now)
 					if err == nil {
 						if strings.HasPrefix(name, "page") {
 							msg.AddMeta("unit", "4K_pages/s")
--- a/collectors/numastatsMetric.go
+++ b/collectors/numastatsMetric.go
@@ -10,8 +10,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 type NUMAStatsCollectorConfig struct {
@@ -72,7 +72,9 @@ func (m *NUMAStatsCollector) Init(config json.RawMessage) error {

 	m.name = "NUMAStatsCollector"
 	m.parallel = true
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.meta = map[string]string{
 		"source": m.name,
 		"group":  "NUMA",
@@ -82,7 +84,7 @@ func (m *NUMAStatsCollector) Init(config json.RawMessage) error {
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
-			return fmt.Errorf("unable to unmarshal numastat configuration: %s", err.Error())
+			return fmt.Errorf("%s Init(): unable to unmarshal numastat configuration: %w", m.name, err)
 		}
 	}

@@ -91,10 +93,10 @@ func (m *NUMAStatsCollector) Init(config json.RawMessage) error {
 	globPattern := base + "[0-9]*"
 	dirs, err := filepath.Glob(globPattern)
 	if err != nil {
-		return fmt.Errorf("unable to glob files with pattern '%s'", globPattern)
+		return fmt.Errorf("%s Init(): unable to glob files with pattern '%s'", m.name, globPattern)
 	}
 	if dirs == nil {
-		return fmt.Errorf("unable to find any files with pattern '%s'", globPattern)
+		return fmt.Errorf("%s Init(): unable to find any files with pattern '%s'", m.name, globPattern)
 	}
 	m.topology = make([]NUMAStatsCollectorTopolgy, 0, len(dirs))
 	for _, dir := range dirs {
@@ -186,7 +188,11 @@ func (m *NUMAStatsCollector) Read(interval time.Duration, output chan lp.CCMessa
 				t.previousValues[key] = value
 			}
 		}
-		file.Close()
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", t.file, err))
+		}
 	}
 }

--- a/collectors/nvidiaMetric.go
+++ b/collectors/nvidiaMetric.go
@@ -12,11 +12,14 @@ import (
 	"errors"
 	"fmt"
 	"log"
+	"maps"
+	"slices"
+	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	"github.com/NVIDIA/go-nvml/pkg/nvml"
 )

@@ -64,7 +67,9 @@ func (m *NvidiaCollector) Init(config json.RawMessage) error {
 	m.config.ProcessMigDevices = false
 	m.config.UseUuidForMigDevices = false
 	m.config.UseSliceForMigDevices = false
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -105,11 +110,11 @@ func (m *NvidiaCollector) Init(config json.RawMessage) error {
 	// For all GPUs
 	idx := 0
 	m.gpus = make([]NvidiaCollectorDevice, num_gpus)
-	for i := 0; i < num_gpus; i++ {
+	for i := range num_gpus {

 		// Skip excluded devices by ID
-		str_i := fmt.Sprintf("%d", i)
-		if _, skip := stringArrayContains(m.config.ExcludeDevices, str_i); skip {
+		str_i := strconv.Itoa(i)
+		if slices.Contains(m.config.ExcludeDevices, str_i) {
 			cclog.ComponentDebug(m.name, "Skipping excluded device", str_i)
 			continue
 		}
@@ -137,7 +142,7 @@ func (m *NvidiaCollector) Init(config json.RawMessage) error {
 			pciInfo.Device)

 		// Skip excluded devices specified by PCI ID
-		if _, skip := stringArrayContains(m.config.ExcludeDevices, pci_id); skip {
+		if slices.Contains(m.config.ExcludeDevices, pci_id) {
 			cclog.ComponentDebug(m.name, "Skipping excluded device", pci_id)
 			continue
 		}
@@ -222,18 +227,20 @@ func readMemoryInfo(device *NvidiaCollectorDevice, output chan lp.CCMessage) err
 		var total uint64
 		var used uint64
 		var reserved uint64 = 0
-		var v2 bool = false
+		v2 := false
 		meminfo, ret := nvml.DeviceGetMemoryInfo(device.device)
 		if ret != nvml.SUCCESS {
 			err := errors.New(nvml.ErrorString(ret))
 			return err
 		}
+		// Total physical device memory (in bytes)
 		total = meminfo.Total
+		// Sum of Reserved and Allocated device memory (in bytes)
 		used = meminfo.Used

 		if !device.excludeMetrics["nv_fb_mem_total"] {
 			t := float64(total) / (1024 * 1024)
-			y, err := lp.NewMessage("nv_fb_mem_total", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_fb_mem_total", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MByte")
 				output <- y
@@ -242,7 +249,7 @@ func readMemoryInfo(device *NvidiaCollectorDevice, output chan lp.CCMessage) err

 		if !device.excludeMetrics["nv_fb_mem_used"] {
 			f := float64(used) / (1024 * 1024)
-			y, err := lp.NewMessage("nv_fb_mem_used", device.tags, device.meta, map[string]interface{}{"value": f}, time.Now())
+			y, err := lp.NewMetric("nv_fb_mem_used", device.tags, device.meta, f, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MByte")
 				output <- y
@@ -251,7 +258,7 @@ func readMemoryInfo(device *NvidiaCollectorDevice, output chan lp.CCMessage) err

 		if v2 && !device.excludeMetrics["nv_fb_mem_reserved"] {
 			r := float64(reserved) / (1024 * 1024)
-			y, err := lp.NewMessage("nv_fb_mem_reserved", device.tags, device.meta, map[string]interface{}{"value": r}, time.Now())
+			y, err := lp.NewMetric("nv_fb_mem_reserved", device.tags, device.meta, r, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MByte")
 				output <- y
@@ -270,7 +277,7 @@ func readBarMemoryInfo(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		}
 		if !device.excludeMetrics["nv_bar1_mem_total"] {
 			t := float64(meminfo.Bar1Total) / (1024 * 1024)
-			y, err := lp.NewMessage("nv_bar1_mem_total", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_bar1_mem_total", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MByte")
 				output <- y
@@ -278,7 +285,7 @@ func readBarMemoryInfo(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		}
 		if !device.excludeMetrics["nv_bar1_mem_used"] {
 			t := float64(meminfo.Bar1Used) / (1024 * 1024)
-			y, err := lp.NewMessage("nv_bar1_mem_used", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_bar1_mem_used", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MByte")
 				output <- y
@@ -312,14 +319,14 @@ func readUtilization(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 		util, ret := nvml.DeviceGetUtilizationRates(device.device)
 		if ret == nvml.SUCCESS {
 			if !device.excludeMetrics["nv_util"] {
-				y, err := lp.NewMessage("nv_util", device.tags, device.meta, map[string]interface{}{"value": float64(util.Gpu)}, time.Now())
+				y, err := lp.NewMetric("nv_util", device.tags, device.meta, float64(util.Gpu), time.Now())
 				if err == nil {
 					y.AddMeta("unit", "%")
 					output <- y
 				}
 			}
 			if !device.excludeMetrics["nv_mem_util"] {
-				y, err := lp.NewMessage("nv_mem_util", device.tags, device.meta, map[string]interface{}{"value": float64(util.Memory)}, time.Now())
+				y, err := lp.NewMetric("nv_mem_util", device.tags, device.meta, float64(util.Memory), time.Now())
 				if err == nil {
 					y.AddMeta("unit", "%")
 					output <- y
@@ -339,7 +346,7 @@ func readTemp(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 		// * NVML_TEMPERATURE_COUNT
 		temp, ret := nvml.DeviceGetTemperature(device.device, nvml.TEMPERATURE_GPU)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_temp", device.tags, device.meta, map[string]interface{}{"value": float64(temp)}, time.Now())
+			y, err := lp.NewMetric("nv_temp", device.tags, device.meta, float64(temp), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "degC")
 				output <- y
@@ -362,7 +369,7 @@ func readFan(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 		// This value may exceed 100% in certain cases.
 		fan, ret := nvml.DeviceGetFanSpeed(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_fan", device.tags, device.meta, map[string]interface{}{"value": float64(fan)}, time.Now())
+			y, err := lp.NewMetric("nv_fan", device.tags, device.meta, float64(fan), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "%")
 				output <- y
@@ -372,27 +379,6 @@ func readFan(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	return nil
 }

-// func readFans(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
-// 	if !device.excludeMetrics["nv_fan"] {
-// 		numFans, ret := nvml.DeviceGetNumFans(device.device)
-// 		if ret == nvml.SUCCESS {
-// 			for i := 0; i < numFans; i++ {
-// 				fan, ret := nvml.DeviceGetFanSpeed_v2(device.device, i)
-// 				if ret == nvml.SUCCESS {
-// 					y, err := lp.NewMessage("nv_fan", device.tags, device.meta, map[string]interface{}{"value": float64(fan)}, time.Now())
-// 					if err == nil {
-// 						y.AddMeta("unit", "%")
-// 						y.AddTag("stype", "fan")
-// 						y.AddTag("stype-id", fmt.Sprintf("%d", i))
-// 						output <- y
-// 					}
-// 				}
-// 			}
-// 		}
-// 	}
-// 	return nil
-// }
-
 func readEccMode(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	if !device.excludeMetrics["nv_ecc_mode"] {
 		// Retrieves the current and pending ECC modes for the device.
@@ -403,22 +389,23 @@ func readEccMode(device *NvidiaCollectorDevice, output chan lp.CCMessage) error
 		// Changing ECC modes requires a reboot.
 		// The "pending" ECC mode refers to the target mode following the next reboot.
 		_, ecc_pend, ret := nvml.DeviceGetEccMode(device.device)
-		if ret == nvml.SUCCESS {
+		switch ret {
+		case nvml.SUCCESS:
 			var y lp.CCMessage
 			var err error
 			switch ecc_pend {
 			case nvml.FEATURE_DISABLED:
-				y, err = lp.NewMessage("nv_ecc_mode", device.tags, device.meta, map[string]interface{}{"value": "OFF"}, time.Now())
+				y, err = lp.NewMetric("nv_ecc_mode", device.tags, device.meta, "OFF", time.Now())
 			case nvml.FEATURE_ENABLED:
-				y, err = lp.NewMessage("nv_ecc_mode", device.tags, device.meta, map[string]interface{}{"value": "ON"}, time.Now())
+				y, err = lp.NewMetric("nv_ecc_mode", device.tags, device.meta, "ON", time.Now())
 			default:
-				y, err = lp.NewMessage("nv_ecc_mode", device.tags, device.meta, map[string]interface{}{"value": "UNKNOWN"}, time.Now())
+				y, err = lp.NewMetric("nv_ecc_mode", device.tags, device.meta, "UNKNOWN", time.Now())
 			}
 			if err == nil {
 				output <- y
 			}
-		} else if ret == nvml.ERROR_NOT_SUPPORTED {
-			y, err := lp.NewMessage("nv_ecc_mode", device.tags, device.meta, map[string]interface{}{"value": "N/A"}, time.Now())
+		case nvml.ERROR_NOT_SUPPORTED:
+			y, err := lp.NewMetric("nv_ecc_mode", device.tags, device.meta, "N/A", time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -438,7 +425,7 @@ func readPerfState(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 		// 32: Unknown performance state.
 		pState, ret := nvml.DeviceGetPerformanceState(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_perf_state", device.tags, device.meta, map[string]interface{}{"value": fmt.Sprintf("P%d", int(pState))}, time.Now())
+			y, err := lp.NewMetric("nv_perf_state", device.tags, device.meta, fmt.Sprintf("P%d", int(pState)), time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -464,7 +451,7 @@ func readPowerUsage(device *NvidiaCollectorDevice, output chan lp.CCMessage) err
 		if mode == nvml.FEATURE_ENABLED {
 			power, ret := nvml.DeviceGetPowerUsage(device.device)
 			if ret == nvml.SUCCESS {
-				y, err := lp.NewMessage("nv_power_usage", device.tags, device.meta, map[string]interface{}{"value": float64(power) / 1000}, time.Now())
+				y, err := lp.NewMetric("nv_power_usage", device.tags, device.meta, float64(power)/1000, time.Now())
 				if err == nil {
 					y.AddMeta("unit", "watts")
 					output <- y
@@ -490,7 +477,12 @@ func readEnergyConsumption(device *NvidiaCollectorDevice, output chan lp.CCMessa
 			if ret == nvml.SUCCESS {
 				if device.lastEnergyReading != 0 {
 					if !device.excludeMetrics["nv_energy"] {
-						y, err := lp.NewMetric("nv_energy", device.tags, device.meta, (energy-device.lastEnergyReading)/1000, now)
+						y, err := lp.NewMetric(
+							"nv_energy",
+							device.tags,
+							device.meta,
+							(energy-device.lastEnergyReading)/1000,
+							now)
 						if err == nil {
 							y.AddMeta("unit", "Joules")
 							output <- y
@@ -532,7 +524,7 @@ func readClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	if !device.excludeMetrics["nv_graphics_clock"] {
 		graphicsClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_GRAPHICS)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_graphics_clock", device.tags, device.meta, map[string]interface{}{"value": float64(graphicsClock)}, time.Now())
+			y, err := lp.NewMetric("nv_graphics_clock", device.tags, device.meta, float64(graphicsClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -543,7 +535,7 @@ func readClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	if !device.excludeMetrics["nv_sm_clock"] {
 		smCock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_SM)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_sm_clock", device.tags, device.meta, map[string]interface{}{"value": float64(smCock)}, time.Now())
+			y, err := lp.NewMetric("nv_sm_clock", device.tags, device.meta, float64(smCock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -554,7 +546,7 @@ func readClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	if !device.excludeMetrics["nv_mem_clock"] {
 		memClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_MEM)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_mem_clock", device.tags, device.meta, map[string]interface{}{"value": float64(memClock)}, time.Now())
+			y, err := lp.NewMetric("nv_mem_clock", device.tags, device.meta, float64(memClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -564,7 +556,7 @@ func readClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) error {
 	if !device.excludeMetrics["nv_video_clock"] {
 		memClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_VIDEO)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_video_clock", device.tags, device.meta, map[string]interface{}{"value": float64(memClock)}, time.Now())
+			y, err := lp.NewMetric("nv_video_clock", device.tags, device.meta, float64(memClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -589,7 +581,7 @@ func readMaxClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 	if !device.excludeMetrics["nv_max_graphics_clock"] {
 		max_gclk, ret := nvml.DeviceGetMaxClockInfo(device.device, nvml.CLOCK_GRAPHICS)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_max_graphics_clock", device.tags, device.meta, map[string]interface{}{"value": float64(max_gclk)}, time.Now())
+			y, err := lp.NewMetric("nv_max_graphics_clock", device.tags, device.meta, float64(max_gclk), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -598,9 +590,9 @@ func readMaxClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 	}

 	if !device.excludeMetrics["nv_max_sm_clock"] {
-		maxSmClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_SM)
+		maxSmClock, ret := nvml.DeviceGetMaxClockInfo(device.device, nvml.CLOCK_SM)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_max_sm_clock", device.tags, device.meta, map[string]interface{}{"value": float64(maxSmClock)}, time.Now())
+			y, err := lp.NewMetric("nv_max_sm_clock", device.tags, device.meta, float64(maxSmClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -609,9 +601,9 @@ func readMaxClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 	}

 	if !device.excludeMetrics["nv_max_mem_clock"] {
-		maxMemClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_MEM)
+		maxMemClock, ret := nvml.DeviceGetMaxClockInfo(device.device, nvml.CLOCK_MEM)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_max_mem_clock", device.tags, device.meta, map[string]interface{}{"value": float64(maxMemClock)}, time.Now())
+			y, err := lp.NewMetric("nv_max_mem_clock", device.tags, device.meta, float64(maxMemClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -620,9 +612,9 @@ func readMaxClocks(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 	}

 	if !device.excludeMetrics["nv_max_video_clock"] {
-		maxMemClock, ret := nvml.DeviceGetClockInfo(device.device, nvml.CLOCK_VIDEO)
+		maxVideoClock, ret := nvml.DeviceGetMaxClockInfo(device.device, nvml.CLOCK_VIDEO)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_max_video_clock", device.tags, device.meta, map[string]interface{}{"value": float64(maxMemClock)}, time.Now())
+			y, err := lp.NewMetric("nv_max_video_clock", device.tags, device.meta, float64(maxVideoClock), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "MHz")
 				output <- y
@@ -645,7 +637,7 @@ func readEccErrors(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 		// i.e. the total set of errors across the entire device.
 		ecc_db, ret := nvml.DeviceGetTotalEccErrors(device.device, nvml.MEMORY_ERROR_TYPE_UNCORRECTED, nvml.AGGREGATE_ECC)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_ecc_uncorrected_error", device.tags, device.meta, map[string]interface{}{"value": float64(ecc_db)}, time.Now())
+			y, err := lp.NewMetric("nv_ecc_uncorrected_error", device.tags, device.meta, float64(ecc_db), time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -654,7 +646,7 @@ func readEccErrors(device *NvidiaCollectorDevice, output chan lp.CCMessage) erro
 	if !device.excludeMetrics["nv_ecc_corrected_error"] {
 		ecc_sb, ret := nvml.DeviceGetTotalEccErrors(device.device, nvml.MEMORY_ERROR_TYPE_CORRECTED, nvml.AGGREGATE_ECC)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_ecc_corrected_error", device.tags, device.meta, map[string]interface{}{"value": float64(ecc_sb)}, time.Now())
+			y, err := lp.NewMetric("nv_ecc_corrected_error", device.tags, device.meta, float64(ecc_sb), time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -673,7 +665,7 @@ func readPowerLimit(device *NvidiaCollectorDevice, output chan lp.CCMessage) err
 		// If the card's total power draw reaches this limit the power management algorithm kicks in.
 		pwr_limit, ret := nvml.DeviceGetPowerManagementLimit(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_power_max_limit", device.tags, device.meta, map[string]interface{}{"value": float64(pwr_limit) / 1000}, time.Now())
+			y, err := lp.NewMetric("nv_power_max_limit", device.tags, device.meta, float64(pwr_limit)/1000, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "watts")
 				output <- y
@@ -700,7 +692,7 @@ func readEncUtilization(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		// Note: On MIG-enabled GPUs, querying encoder utilization is not currently supported.
 		enc_util, _, ret := nvml.DeviceGetEncoderUtilization(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_encoder_util", device.tags, device.meta, map[string]interface{}{"value": float64(enc_util)}, time.Now())
+			y, err := lp.NewMetric("nv_encoder_util", device.tags, device.meta, float64(enc_util), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "%")
 				output <- y
@@ -727,7 +719,7 @@ func readDecUtilization(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		// Note: On MIG-enabled GPUs, querying encoder utilization is not currently supported.
 		dec_util, _, ret := nvml.DeviceGetDecoderUtilization(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_decoder_util", device.tags, device.meta, map[string]interface{}{"value": float64(dec_util)}, time.Now())
+			y, err := lp.NewMetric("nv_decoder_util", device.tags, device.meta, float64(dec_util), time.Now())
 			if err == nil {
 				y.AddMeta("unit", "%")
 				output <- y
@@ -754,33 +746,33 @@ func readRemappedRows(device *NvidiaCollectorDevice, output chan lp.CCMessage) e
 		corrected, uncorrected, pending, failure, ret := nvml.DeviceGetRemappedRows(device.device)
 		if ret == nvml.SUCCESS {
 			if !device.excludeMetrics["nv_remapped_rows_corrected"] {
-				y, err := lp.NewMessage("nv_remapped_rows_corrected", device.tags, device.meta, map[string]interface{}{"value": float64(corrected)}, time.Now())
+				y, err := lp.NewMetric("nv_remapped_rows_corrected", device.tags, device.meta, float64(corrected), time.Now())
 				if err == nil {
 					output <- y
 				}
 			}
 			if !device.excludeMetrics["nv_remapped_rows_uncorrected"] {
-				y, err := lp.NewMessage("nv_remapped_rows_corrected", device.tags, device.meta, map[string]interface{}{"value": float64(uncorrected)}, time.Now())
+				y, err := lp.NewMetric("nv_remapped_rows_corrected", device.tags, device.meta, float64(uncorrected), time.Now())
 				if err == nil {
 					output <- y
 				}
 			}
 			if !device.excludeMetrics["nv_remapped_rows_pending"] {
-				var p int = 0
+				p := 0
 				if pending {
 					p = 1
 				}
-				y, err := lp.NewMessage("nv_remapped_rows_pending", device.tags, device.meta, map[string]interface{}{"value": p}, time.Now())
+				y, err := lp.NewMetric("nv_remapped_rows_pending", device.tags, device.meta, p, time.Now())
 				if err == nil {
 					output <- y
 				}
 			}
 			if !device.excludeMetrics["nv_remapped_rows_failure"] {
-				var f int = 0
+				f := 0
 				if failure {
 					f = 1
 				}
-				y, err := lp.NewMessage("nv_remapped_rows_failure", device.tags, device.meta, map[string]interface{}{"value": f}, time.Now())
+				y, err := lp.NewMetric("nv_remapped_rows_failure", device.tags, device.meta, f, time.Now())
 				if err == nil {
 					output <- y
 				}
@@ -814,7 +806,7 @@ func readProcessCounts(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		//        Querying per-instance information using MIG device handles is not supported if the device is in vGPU Host virtualization mode.
 		procList, ret := nvml.DeviceGetComputeRunningProcesses(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_compute_processes", device.tags, device.meta, map[string]interface{}{"value": len(procList)}, time.Now())
+			y, err := lp.NewMetric("nv_compute_processes", device.tags, device.meta, len(procList), time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -843,7 +835,7 @@ func readProcessCounts(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		//       Querying per-instance information using MIG device handles is not supported if the device is in vGPU Host virtualization mode.
 		procList, ret := nvml.DeviceGetGraphicsRunningProcesses(device.device)
 		if ret == nvml.SUCCESS {
-			y, err := lp.NewMessage("nv_graphics_processes", device.tags, device.meta, map[string]interface{}{"value": len(procList)}, time.Now())
+			y, err := lp.NewMetric("nv_graphics_processes", device.tags, device.meta, len(procList), time.Now())
 			if err == nil {
 				output <- y
 			}
@@ -873,7 +865,7 @@ func readProcessCounts(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 	// 	//       Querying per-instance information using MIG device handles is not supported if the device is in vGPU Host virtualization mode.
 	// 	procList, ret := nvml.DeviceGetMPSComputeRunningProcesses(device.device)
 	// 	if ret == nvml.SUCCESS {
-	// 		y, err := lp.NewMessage("nv_mps_compute_processes", device.tags, device.meta, map[string]interface{}{"value": len(procList)}, time.Now())
+	// 		y, err := lp.NewMetric("nv_mps_compute_processes", device.tags, device.meta, len(procList), time.Now())
 	// 		if err == nil {
 	// 			output <- y
 	// 		}
@@ -901,7 +893,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_POWER)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_power", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_power", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -913,7 +905,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_THERMAL)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_thermal", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_thermal", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -925,7 +917,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_SYNC_BOOST)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_sync_boost", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_sync_boost", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -937,7 +929,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_BOARD_LIMIT)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_board_limit", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_board_limit", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -949,7 +941,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_LOW_UTILIZATION)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_low_util", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_low_util", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -961,7 +953,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_RELIABILITY)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_reliability", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_reliability", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -973,7 +965,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_TOTAL_APP_CLOCKS)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_below_app_clock", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_below_app_clock", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -985,7 +977,7 @@ func readViolationStats(device *NvidiaCollectorDevice, output chan lp.CCMessage)
 		violTime, ret = nvml.DeviceGetViolationStatus(device.device, nvml.PERF_POLICY_TOTAL_BASE_CLOCKS)
 		if ret == nvml.SUCCESS {
 			t := float64(violTime.ViolationTime) * 1e-9
-			y, err := lp.NewMessage("nv_violation_below_base_clock", device.tags, device.meta, map[string]interface{}{"value": t}, time.Now())
+			y, err := lp.NewMetric("nv_violation_below_base_clock", device.tags, device.meta, t, time.Now())
 			if err == nil {
 				y.AddMeta("unit", "sec")
 				output <- y
@@ -1008,19 +1000,19 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	var aggregate_recovery_errors uint64 = 0
 	var aggregate_crc_flit_errors uint64 = 0

-	for i := 0; i < nvml.NVLINK_MAX_LINKS; i++ {
+	for i := range nvml.NVLINK_MAX_LINKS {
 		state, ret := nvml.DeviceGetNvLinkState(device.device, i)
 		if ret == nvml.SUCCESS {
 			if state == nvml.FEATURE_ENABLED {
 				if !device.excludeMetrics["nv_nvlink_crc_errors"] {
 					// Data link receive data CRC error counter
 					count, ret := nvml.DeviceGetNvLinkErrorCounter(device.device, i, nvml.NVLINK_ERROR_DL_CRC_DATA)
-					aggregate_crc_errors = aggregate_crc_errors + count
+					aggregate_crc_errors += count
 					if ret == nvml.SUCCESS {
-						y, err := lp.NewMessage("nv_nvlink_crc_errors", device.tags, device.meta, map[string]interface{}{"value": count}, time.Now())
+						y, err := lp.NewMetric("nv_nvlink_crc_errors", device.tags, device.meta, count, time.Now())
 						if err == nil {
 							y.AddTag("stype", "nvlink")
-							y.AddTag("stype-id", fmt.Sprintf("%d", i))
+							y.AddTag("stype-id", strconv.Itoa(i))
 							output <- y
 						}
 					}
@@ -1028,12 +1020,12 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 				if !device.excludeMetrics["nv_nvlink_ecc_errors"] {
 					// Data link receive data ECC error counter
 					count, ret := nvml.DeviceGetNvLinkErrorCounter(device.device, i, nvml.NVLINK_ERROR_DL_ECC_DATA)
-					aggregate_ecc_errors = aggregate_ecc_errors + count
+					aggregate_ecc_errors += count
 					if ret == nvml.SUCCESS {
-						y, err := lp.NewMessage("nv_nvlink_ecc_errors", device.tags, device.meta, map[string]interface{}{"value": count}, time.Now())
+						y, err := lp.NewMetric("nv_nvlink_ecc_errors", device.tags, device.meta, count, time.Now())
 						if err == nil {
 							y.AddTag("stype", "nvlink")
-							y.AddTag("stype-id", fmt.Sprintf("%d", i))
+							y.AddTag("stype-id", strconv.Itoa(i))
 							output <- y
 						}
 					}
@@ -1041,12 +1033,12 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 				if !device.excludeMetrics["nv_nvlink_replay_errors"] {
 					// Data link transmit replay error counter
 					count, ret := nvml.DeviceGetNvLinkErrorCounter(device.device, i, nvml.NVLINK_ERROR_DL_REPLAY)
-					aggregate_replay_errors = aggregate_replay_errors + count
+					aggregate_replay_errors += count
 					if ret == nvml.SUCCESS {
-						y, err := lp.NewMessage("nv_nvlink_replay_errors", device.tags, device.meta, map[string]interface{}{"value": count}, time.Now())
+						y, err := lp.NewMetric("nv_nvlink_replay_errors", device.tags, device.meta, count, time.Now())
 						if err == nil {
 							y.AddTag("stype", "nvlink")
-							y.AddTag("stype-id", fmt.Sprintf("%d", i))
+							y.AddTag("stype-id", strconv.Itoa(i))
 							output <- y
 						}
 					}
@@ -1054,12 +1046,12 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 				if !device.excludeMetrics["nv_nvlink_recovery_errors"] {
 					// Data link transmit recovery error counter
 					count, ret := nvml.DeviceGetNvLinkErrorCounter(device.device, i, nvml.NVLINK_ERROR_DL_RECOVERY)
-					aggregate_recovery_errors = aggregate_recovery_errors + count
+					aggregate_recovery_errors += count
 					if ret == nvml.SUCCESS {
-						y, err := lp.NewMessage("nv_nvlink_recovery_errors", device.tags, device.meta, map[string]interface{}{"value": count}, time.Now())
+						y, err := lp.NewMetric("nv_nvlink_recovery_errors", device.tags, device.meta, count, time.Now())
 						if err == nil {
 							y.AddTag("stype", "nvlink")
-							y.AddTag("stype-id", fmt.Sprintf("%d", i))
+							y.AddTag("stype-id", strconv.Itoa(i))
 							output <- y
 						}
 					}
@@ -1067,12 +1059,12 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 				if !device.excludeMetrics["nv_nvlink_crc_flit_errors"] {
 					// Data link receive flow control digit CRC error counter
 					count, ret := nvml.DeviceGetNvLinkErrorCounter(device.device, i, nvml.NVLINK_ERROR_DL_CRC_FLIT)
-					aggregate_crc_flit_errors = aggregate_crc_flit_errors + count
+					aggregate_crc_flit_errors += count
 					if ret == nvml.SUCCESS {
-						y, err := lp.NewMessage("nv_nvlink_crc_flit_errors", device.tags, device.meta, map[string]interface{}{"value": count}, time.Now())
+						y, err := lp.NewMetric("nv_nvlink_crc_flit_errors", device.tags, device.meta, count, time.Now())
 						if err == nil {
 							y.AddTag("stype", "nvlink")
-							y.AddTag("stype-id", fmt.Sprintf("%d", i))
+							y.AddTag("stype-id", strconv.Itoa(i))
 							output <- y
 						}
 					}
@@ -1084,7 +1076,7 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	// Export aggegated values
 	if !device.excludeMetrics["nv_nvlink_crc_errors"] {
 		// Data link receive data CRC error counter
-		y, err := lp.NewMessage("nv_nvlink_crc_errors_sum", device.tags, device.meta, map[string]interface{}{"value": aggregate_crc_errors}, time.Now())
+		y, err := lp.NewMetric("nv_nvlink_crc_errors_sum", device.tags, device.meta, aggregate_crc_errors, time.Now())
 		if err == nil {
 			y.AddTag("stype", "nvlink")
 			output <- y
@@ -1092,7 +1084,7 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	}
 	if !device.excludeMetrics["nv_nvlink_ecc_errors"] {
 		// Data link receive data ECC error counter
-		y, err := lp.NewMessage("nv_nvlink_ecc_errors_sum", device.tags, device.meta, map[string]interface{}{"value": aggregate_ecc_errors}, time.Now())
+		y, err := lp.NewMetric("nv_nvlink_ecc_errors_sum", device.tags, device.meta, aggregate_ecc_errors, time.Now())
 		if err == nil {
 			y.AddTag("stype", "nvlink")
 			output <- y
@@ -1100,7 +1092,7 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	}
 	if !device.excludeMetrics["nv_nvlink_replay_errors"] {
 		// Data link transmit replay error counter
-		y, err := lp.NewMessage("nv_nvlink_replay_errors_sum", device.tags, device.meta, map[string]interface{}{"value": aggregate_replay_errors}, time.Now())
+		y, err := lp.NewMetric("nv_nvlink_replay_errors_sum", device.tags, device.meta, aggregate_replay_errors, time.Now())
 		if err == nil {
 			y.AddTag("stype", "nvlink")
 			output <- y
@@ -1108,7 +1100,7 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	}
 	if !device.excludeMetrics["nv_nvlink_recovery_errors"] {
 		// Data link transmit recovery error counter
-		y, err := lp.NewMessage("nv_nvlink_recovery_errors_sum", device.tags, device.meta, map[string]interface{}{"value": aggregate_recovery_errors}, time.Now())
+		y, err := lp.NewMetric("nv_nvlink_recovery_errors_sum", device.tags, device.meta, aggregate_recovery_errors, time.Now())
 		if err == nil {
 			y.AddTag("stype", "nvlink")
 			output <- y
@@ -1116,7 +1108,7 @@ func readNVLinkStats(device *NvidiaCollectorDevice, output chan lp.CCMessage) er
 	}
 	if !device.excludeMetrics["nv_nvlink_crc_flit_errors"] {
 		// Data link receive flow control digit CRC error counter
-		y, err := lp.NewMessage("nv_nvlink_crc_flit_errors_sum", device.tags, device.meta, map[string]interface{}{"value": aggregate_crc_flit_errors}, time.Now())
+		y, err := lp.NewMetric("nv_nvlink_crc_flit_errors_sum", device.tags, device.meta, aggregate_crc_flit_errors, time.Now())
 		if err == nil {
 			y.AddTag("stype", "nvlink")
 			output <- y
@@ -1256,7 +1248,7 @@ func (m *NvidiaCollector) Read(interval time.Duration, output chan lp.CCMessage)
 			}
 			cclog.ComponentDebug(m.name, "Reading MIG devices for GPU", i)

-			for j := 0; j < maxMig; j++ {
+			for j := range maxMig {
 				mdev, ret := nvml.DeviceGetMigDeviceHandleByIndex(m.gpus[i].device, j)
 				if ret != nvml.SUCCESS {
 					continue
@@ -1273,9 +1265,7 @@ func (m *NvidiaCollector) Read(interval time.Duration, output chan lp.CCMessage)
 					meta:           map[string]string{},
 					excludeMetrics: excludeMetrics,
 				}
-				for k, v := range m.gpus[i].tags {
-					migDevice.tags[k] = v
-				}
+				maps.Copy(migDevice.tags, m.gpus[i].tags)
 				migDevice.tags["stype"] = "mig"
 				if m.config.UseUuidForMigDevices {
 					uuid, ret := nvml.DeviceGetUUID(mdev)
@@ -1289,19 +1279,17 @@ func (m *NvidiaCollector) Read(interval time.Duration, output chan lp.CCMessage)
 					if ret == nvml.SUCCESS {
 						mname, ret := nvml.DeviceGetName(mdev)
 						if ret == nvml.SUCCESS {
-							x := strings.Replace(mname, name, "", -1)
-							x = strings.Replace(x, "MIG", "", -1)
+							x := strings.ReplaceAll(mname, name, "")
+							x = strings.ReplaceAll(x, "MIG", "")
 							x = strings.TrimSpace(x)
 							migDevice.tags["stype-id"] = x
 						}
 					}
 				}
 				if _, ok := migDevice.tags["stype-id"]; !ok {
-					migDevice.tags["stype-id"] = fmt.Sprintf("%d", j)
-				}
-				for k, v := range m.gpus[i].meta {
-					migDevice.meta[k] = v
+					migDevice.tags["stype-id"] = strconv.Itoa(j)
 				}
+				maps.Copy(migDevice.meta, m.gpus[i].meta)
 				if _, ok := migDevice.meta["uuid"]; ok && !m.config.UseUuidForMigDevices {
 					uuid, ret := nvml.DeviceGetUUID(mdev)
 					if ret == nvml.SUCCESS {
@@ -1317,7 +1305,9 @@ func (m *NvidiaCollector) Read(interval time.Duration, output chan lp.CCMessage)

 func (m *NvidiaCollector) Close() {
 	if m.init {
-		nvml.Shutdown()
+		if ret := nvml.Shutdown(); ret != nvml.SUCCESS {
+			cclog.ComponentError(m.name, "nvml.Shutdown() not successful")
+		}
 		m.init = false
 	}
 }
--- a/collectors/raplMetric.go
+++ b/collectors/raplMetric.go
@@ -16,8 +16,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // running average power limit (RAPL) monitoring attributes for a zone
@@ -54,9 +54,10 @@ func (m *RAPLCollector) Init(config json.RawMessage) error {
 		return nil
 	}

-	var err error = nil
 	m.name = "RAPLCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{
 		"source": m.name,
@@ -66,7 +67,7 @@ func (m *RAPLCollector) Init(config json.RawMessage) error {

 	// Read in the JSON configuration
 	if len(config) > 0 {
-		err = json.Unmarshal(config, &m.config)
+		err := json.Unmarshal(config, &m.config)
 		if err != nil {
 			cclog.ComponentError(m.name, "Error reading config:", err.Error())
 			return err
@@ -248,7 +249,7 @@ func (m *RAPLCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 					"rapl_average_power",
 					p.tags,
 					m.meta,
-					map[string]interface{}{"value": averagePower},
+					map[string]any{"value": averagePower},
 					energyTimestamp)
 				if err == nil {
 					output <- y
--- a/collectors/rocmsmiMetric.go
+++ b/collectors/rocmsmiMetric.go
@@ -11,10 +11,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"slices"
+	"strconv"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	"github.com/ClusterCockpit/go-rocm-smi/pkg/rocm_smi"
 )

@@ -52,7 +54,9 @@ func (m *RocmSmiCollector) Init(config json.RawMessage) error {
 	// Always set the name early in Init() to use it in cclog.Component* functions
 	m.name = "RocmSmiCollector"
 	// This is for later use, also call it early
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	// Define meta information sent with each metric
 	// (Can also be dynamic or this is the basic set with extension through AddMeta())
 	//m.meta = map[string]string{"source": m.name, "group": "AMD"}
@@ -85,22 +89,11 @@ func (m *RocmSmiCollector) Init(config json.RawMessage) error {
 		return err
 	}

-	exclDev := func(s string) bool {
-		skip_device := false
-		for _, excl := range m.config.ExcludeDevices {
-			if excl == s {
-				skip_device = true
-				break
-			}
-		}
-		return skip_device
-	}
-
 	m.devices = make([]RocmSmiCollectorDevice, 0)

-	for i := 0; i < numDevs; i++ {
-		str_i := fmt.Sprintf("%d", i)
-		if exclDev(str_i) {
+	for i := range numDevs {
+		str_i := strconv.Itoa(i)
+		if slices.Contains(m.config.ExcludeDevices, str_i) {
 			continue
 		}
 		device, ret := rocm_smi.DeviceGetHandleByIndex(i)
@@ -124,7 +117,7 @@ func (m *RocmSmiCollector) Init(config json.RawMessage) error {
 			pciInfo.Device,
 			pciInfo.Function)

-		if exclDev(pciId) {
+		if slices.Contains(m.config.ExcludeDevices, pciId) {
 			continue
 		}

@@ -182,130 +175,130 @@ func (m *RocmSmiCollector) Read(interval time.Duration, output chan lp.CCMessage

 		if !dev.excludeMetrics["rocm_gfx_util"] {
 			value := metrics.Average_gfx_activity
-			y, err := lp.NewMessage("rocm_gfx_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_gfx_util", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_umc_util"] {
 			value := metrics.Average_umc_activity
-			y, err := lp.NewMessage("rocm_umc_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_umc_util", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_mm_util"] {
 			value := metrics.Average_mm_activity
-			y, err := lp.NewMessage("rocm_mm_util", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_mm_util", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_avg_power"] {
 			value := metrics.Average_socket_power
-			y, err := lp.NewMessage("rocm_avg_power", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_avg_power", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_mem"] {
 			value := metrics.Temperature_mem
-			y, err := lp.NewMessage("rocm_temp_mem", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_mem", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_hotspot"] {
 			value := metrics.Temperature_hotspot
-			y, err := lp.NewMessage("rocm_temp_hotspot", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_hotspot", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_edge"] {
 			value := metrics.Temperature_edge
-			y, err := lp.NewMessage("rocm_temp_edge", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_edge", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_vrgfx"] {
 			value := metrics.Temperature_vrgfx
-			y, err := lp.NewMessage("rocm_temp_vrgfx", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_vrgfx", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_vrsoc"] {
 			value := metrics.Temperature_vrsoc
-			y, err := lp.NewMessage("rocm_temp_vrsoc", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_vrsoc", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_vrmem"] {
 			value := metrics.Temperature_vrmem
-			y, err := lp.NewMessage("rocm_temp_vrmem", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_temp_vrmem", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_gfx_clock"] {
 			value := metrics.Average_gfxclk_frequency
-			y, err := lp.NewMessage("rocm_gfx_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_gfx_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_soc_clock"] {
 			value := metrics.Average_socclk_frequency
-			y, err := lp.NewMessage("rocm_soc_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_soc_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_u_clock"] {
 			value := metrics.Average_uclk_frequency
-			y, err := lp.NewMessage("rocm_u_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_u_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_v0_clock"] {
 			value := metrics.Average_vclk0_frequency
-			y, err := lp.NewMessage("rocm_v0_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_v0_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_v1_clock"] {
 			value := metrics.Average_vclk1_frequency
-			y, err := lp.NewMessage("rocm_v1_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_v1_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_d0_clock"] {
 			value := metrics.Average_dclk0_frequency
-			y, err := lp.NewMessage("rocm_d0_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_d0_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_d1_clock"] {
 			value := metrics.Average_dclk1_frequency
-			y, err := lp.NewMessage("rocm_d1_clock", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+			y, err := lp.NewMessage("rocm_d1_clock", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 			if err == nil {
 				output <- y
 			}
 		}
 		if !dev.excludeMetrics["rocm_temp_hbm"] {
-			for i := 0; i < rocm_smi.NUM_HBM_INSTANCES; i++ {
+			for i := range rocm_smi.NUM_HBM_INSTANCES {
 				value := metrics.Temperature_hbm[i]
-				y, err := lp.NewMessage("rocm_temp_hbm", dev.tags, dev.meta, map[string]interface{}{"value": value}, timestamp)
+				y, err := lp.NewMessage("rocm_temp_hbm", dev.tags, dev.meta, map[string]any{"value": value}, timestamp)
 				if err == nil {
 					y.AddTag("stype", "device")
-					y.AddTag("stype-id", fmt.Sprintf("%d", i))
+					y.AddTag("stype-id", strconv.Itoa(i))
 					output <- y
 				}
 			}
--- a/collectors/rocmsmiMetric.md
+++ b/collectors/rocmsmiMetric.md
@@ -15,7 +15,9 @@ hugo_path: docs/reference/cc-metric-collector/collectors/rocmsmi.md
 ```json
  "rocm_smi": {
    "exclude_devices": [
-      "0","1", "0000000:ff:01.0"
+      "0",
+      "1",
+      "0000000:ff:01.0"
    ],
    "exclude_metrics": [
      "rocm_mm_util",
@@ -23,7 +25,7 @@ hugo_path: docs/reference/cc-metric-collector/collectors/rocmsmi.md
    ],
    "use_pci_info_as_type_id": true,
    "add_pci_info_tag": false,
-    "add_serial_meta": false,
+    "add_serial_meta": false
  }
 ```

--- a/collectors/sampleMetric.go
+++ b/collectors/sampleMetric.go
@@ -9,10 +9,11 @@ package collectors

 import (
 	"encoding/json"
+	"fmt"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // These are the fields we read from the JSON configuration
@@ -41,7 +42,9 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
 	// Always set the name early in Init() to use it in cclog.Component* functions
 	m.name = "SampleCollector"
 	// This is for later use, also call it early
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	// Tell whether the collector should be run in parallel with others (reading files, ...)
 	// or it should be run serially, mostly for collectors actually doing measurements
 	// because they should not measure the execution of the other collectors
@@ -92,7 +95,7 @@ func (m *SampleCollector) Read(interval time.Duration, output chan lp.CCMessage)
 	// stop := readState()
 	// value = (stop - start) / interval.Seconds()

-	y, err := lp.NewMessage("sample_metric", m.tags, m.meta, map[string]interface{}{"value": value}, timestamp)
+	y, err := lp.NewMessage("sample_metric", m.tags, m.meta, map[string]any{"value": value}, timestamp)
 	if err == nil {
 		// Send it to output channel
 		output <- y
--- a/collectors/sampleTimerMetric.go
+++ b/collectors/sampleTimerMetric.go
@@ -9,11 +9,12 @@ package collectors

 import (
 	"encoding/json"
+	"fmt"
 	"sync"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // These are the fields we read from the JSON configuration
@@ -36,11 +37,13 @@ type SampleTimerCollector struct {
 }

 func (m *SampleTimerCollector) Init(name string, config json.RawMessage) error {
-	var err error = nil
+	var err error
 	// Always set the name early in Init() to use it in cclog.Component* functions
 	m.name = "SampleTimerCollector"
 	// This is for later use, also call it early
-	m.setup()
+	if err = m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	// Define meta information sent with each metric
 	// (Can also be dynamic or this is the basic set with extension through AddMeta())
 	m.meta = map[string]string{"source": m.name, "group": "SAMPLE"}
@@ -107,7 +110,7 @@ func (m *SampleTimerCollector) ReadMetrics(timestamp time.Time) {
 	// stop := readState()
 	// value = (stop - start) / interval.Seconds()

-	y, err := lp.NewMessage("sample_metric", m.tags, m.meta, map[string]interface{}{"value": value}, timestamp)
+	y, err := lp.NewMessage("sample_metric", m.tags, m.meta, map[string]any{"value": value}, timestamp)
 	if err == nil && m.output != nil {
 		// Send it to output channel if we have a valid channel
 		m.output <- y
--- a/collectors/schedstatMetric.go
+++ b/collectors/schedstatMetric.go
@@ -11,14 +11,13 @@ import (
 	"bufio"
 	"encoding/json"
 	"fmt"
-	"math"
 	"os"
 	"strconv"
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const SCHEDSTATFILE = `/proc/schedstat`
@@ -47,37 +46,37 @@ type SchedstatCollector struct {
 // Called once by the collector manager
 // All tags, meta data tags and metrics that do not change over the runtime should be set here
 func (m *SchedstatCollector) Init(config json.RawMessage) error {
-	var err error = nil
 	// Always set the name early in Init() to use it in cclog.Component* functions
 	m.name = "SchedstatCollector"
 	// This is for later use, also call it early
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	// Tell whether the collector should be run in parallel with others (reading files, ...)
-	// or it should be run serially, mostly for collectors acutally doing measurements
+	// or it should be run serially, mostly for collectors actually doing measurements
 	// because they should not measure the execution of the other collectors
 	m.parallel = true
 	// Define meta information sent with each metric
 	// (Can also be dynamic or this is the basic set with extension through AddMeta())
-	m.meta = map[string]string{"source": m.name, "group": "SCHEDSTAT"}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "SCHEDSTAT",
+	}

 	// Read in the JSON configuration
 	if len(config) > 0 {
-		err = json.Unmarshal(config, &m.config)
-		if err != nil {
-			cclog.ComponentError(m.name, "Error reading config:", err.Error())
-			return err
+		if err := json.Unmarshal(config, &m.config); err != nil {
+			return fmt.Errorf("%s Init(): Error reading config: %w", m.name, err)
 		}
 	}

 	// Check input file
-	file, err := os.Open(string(SCHEDSTATFILE))
+	file, err := os.Open(SCHEDSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		return fmt.Errorf("%s Init(): Failed opening scheduler statistics file \"%s\": %w", m.name, SCHEDSTATFILE, err)
 	}
-	defer file.Close()

 	// Pre-generate tags for all CPUs
-	num_cpus := 0
 	m.cputags = make(map[string]map[string]string)
 	m.olddata = make(map[string]map[string]int64)
 	scanner := bufio.NewScanner(file)
@@ -89,10 +88,18 @@ func (m *SchedstatCollector) Init(config json.RawMessage) error {
 			cpu, _ := strconv.Atoi(cpustr)
 			running, _ := strconv.ParseInt(linefields[7], 10, 64)
 			waiting, _ := strconv.ParseInt(linefields[8], 10, 64)
-			m.cputags[linefields[0]] = map[string]string{"type": "hwthread", "type-id": fmt.Sprintf("%d", cpu)}
-			m.olddata[linefields[0]] = map[string]int64{"running": running, "waiting": waiting}
-			num_cpus++
+			m.cputags[linefields[0]] = map[string]string{
+				"type":    "hwthread",
+				"type-id": strconv.Itoa(cpu),
 			}
+			m.olddata[linefields[0]] = map[string]int64{
+				"running": running,
+				"waiting": waiting,
+			}
+		}
+	}
+	if err := file.Close(); err != nil {
+		return fmt.Errorf("%s Init(): Failed closing scheduler statistics file \"%s\": %w", m.name, SCHEDSTATFILE, err)
 	}

 	// Save current timestamp
@@ -109,14 +116,14 @@ func (m *SchedstatCollector) ParseProcLine(linefields []string, tags map[string]
 	diff_running := running - m.olddata[linefields[0]]["running"]
 	diff_waiting := waiting - m.olddata[linefields[0]]["waiting"]

-	var l_running float64 = float64(diff_running) / tsdelta.Seconds() / (math.Pow(1000, 3))
-	var l_waiting float64 = float64(diff_waiting) / tsdelta.Seconds() / (math.Pow(1000, 3))
+	l_running := float64(diff_running) / tsdelta.Seconds() / 1000_000_000
+	l_waiting := float64(diff_waiting) / tsdelta.Seconds() / 1000_000_000

 	m.olddata[linefields[0]]["running"] = running
 	m.olddata[linefields[0]]["waiting"] = waiting
 	value := l_running + l_waiting

-	y, err := lp.NewMessage("cpu_load_core", tags, m.meta, map[string]interface{}{"value": value}, now)
+	y, err := lp.NewMessage("cpu_load_core", tags, m.meta, map[string]any{"value": value}, now)
 	if err == nil {
 		// Send it to output channel
 		output <- y
@@ -134,11 +141,19 @@ func (m *SchedstatCollector) Read(interval time.Duration, output chan lp.CCMessa
 	now := time.Now()
 	tsdelta := now.Sub(m.lastTimestamp)

-	file, err := os.Open(string(SCHEDSTATFILE))
+	file, err := os.Open(SCHEDSTATFILE)
 	if err != nil {
-		cclog.ComponentError(m.name, err.Error())
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", SCHEDSTATFILE, err))
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			cclog.ComponentError(
+				m.name,
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", SCHEDSTATFILE, err))
+		}
+	}()

 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
--- a/collectors/selfMetric.go
+++ b/collectors/selfMetric.go
@@ -9,12 +9,13 @@ package collectors

 import (
 	"encoding/json"
+	"fmt"
 	"runtime"
 	"syscall"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 type SelfCollectorConfig struct {
@@ -34,7 +35,9 @@ type SelfCollector struct {
 func (m *SelfCollector) Init(config json.RawMessage) error {
 	var err error = nil
 	m.name = "SelfCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Self"}
 	m.tags = map[string]string{"type": "node"}
@@ -56,49 +59,49 @@ func (m *SelfCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 		var memstats runtime.MemStats
 		runtime.ReadMemStats(&memstats)

-		y, err := lp.NewMessage("total_alloc", m.tags, m.meta, map[string]interface{}{"value": memstats.TotalAlloc}, timestamp)
+		y, err := lp.NewMessage("total_alloc", m.tags, m.meta, map[string]any{"value": memstats.TotalAlloc}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_alloc", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapAlloc}, timestamp)
+		y, err = lp.NewMessage("heap_alloc", m.tags, m.meta, map[string]any{"value": memstats.HeapAlloc}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_sys", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapSys}, timestamp)
+		y, err = lp.NewMessage("heap_sys", m.tags, m.meta, map[string]any{"value": memstats.HeapSys}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_idle", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapIdle}, timestamp)
+		y, err = lp.NewMessage("heap_idle", m.tags, m.meta, map[string]any{"value": memstats.HeapIdle}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_inuse", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapInuse}, timestamp)
+		y, err = lp.NewMessage("heap_inuse", m.tags, m.meta, map[string]any{"value": memstats.HeapInuse}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_released", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapReleased}, timestamp)
+		y, err = lp.NewMessage("heap_released", m.tags, m.meta, map[string]any{"value": memstats.HeapReleased}, timestamp)
 		if err == nil {
 			y.AddMeta("unit", "Bytes")
 			output <- y
 		}
-		y, err = lp.NewMessage("heap_objects", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapObjects}, timestamp)
+		y, err = lp.NewMessage("heap_objects", m.tags, m.meta, map[string]any{"value": memstats.HeapObjects}, timestamp)
 		if err == nil {
 			output <- y
 		}
 	}
 	if m.config.GoRoutines {
-		y, err := lp.NewMessage("num_goroutines", m.tags, m.meta, map[string]interface{}{"value": runtime.NumGoroutine()}, timestamp)
+		y, err := lp.NewMessage("num_goroutines", m.tags, m.meta, map[string]any{"value": runtime.NumGoroutine()}, timestamp)
 		if err == nil {
 			output <- y
 		}
 	}
 	if m.config.CgoCalls {
-		y, err := lp.NewMessage("num_cgo_calls", m.tags, m.meta, map[string]interface{}{"value": runtime.NumCgoCall()}, timestamp)
+		y, err := lp.NewMessage("num_cgo_calls", m.tags, m.meta, map[string]any{"value": runtime.NumCgoCall()}, timestamp)
 		if err == nil {
 			output <- y
 		}
@@ -109,35 +112,35 @@ func (m *SelfCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 		if err == nil {
 			sec, nsec := rusage.Utime.Unix()
 			t := float64(sec) + (float64(nsec) * 1e-9)
-			y, err := lp.NewMessage("rusage_user_time", m.tags, m.meta, map[string]interface{}{"value": t}, timestamp)
+			y, err := lp.NewMessage("rusage_user_time", m.tags, m.meta, map[string]any{"value": t}, timestamp)
 			if err == nil {
 				y.AddMeta("unit", "seconds")
 				output <- y
 			}
 			sec, nsec = rusage.Stime.Unix()
 			t = float64(sec) + (float64(nsec) * 1e-9)
-			y, err = lp.NewMessage("rusage_system_time", m.tags, m.meta, map[string]interface{}{"value": t}, timestamp)
+			y, err = lp.NewMessage("rusage_system_time", m.tags, m.meta, map[string]any{"value": t}, timestamp)
 			if err == nil {
 				y.AddMeta("unit", "seconds")
 				output <- y
 			}
-			y, err = lp.NewMessage("rusage_vol_ctx_switch", m.tags, m.meta, map[string]interface{}{"value": rusage.Nvcsw}, timestamp)
+			y, err = lp.NewMessage("rusage_vol_ctx_switch", m.tags, m.meta, map[string]any{"value": rusage.Nvcsw}, timestamp)
 			if err == nil {
 				output <- y
 			}
-			y, err = lp.NewMessage("rusage_invol_ctx_switch", m.tags, m.meta, map[string]interface{}{"value": rusage.Nivcsw}, timestamp)
+			y, err = lp.NewMessage("rusage_invol_ctx_switch", m.tags, m.meta, map[string]any{"value": rusage.Nivcsw}, timestamp)
 			if err == nil {
 				output <- y
 			}
-			y, err = lp.NewMessage("rusage_signals", m.tags, m.meta, map[string]interface{}{"value": rusage.Nsignals}, timestamp)
+			y, err = lp.NewMessage("rusage_signals", m.tags, m.meta, map[string]any{"value": rusage.Nsignals}, timestamp)
 			if err == nil {
 				output <- y
 			}
-			y, err = lp.NewMessage("rusage_major_pgfaults", m.tags, m.meta, map[string]interface{}{"value": rusage.Majflt}, timestamp)
+			y, err = lp.NewMessage("rusage_major_pgfaults", m.tags, m.meta, map[string]any{"value": rusage.Majflt}, timestamp)
 			if err == nil {
 				output <- y
 			}
-			y, err = lp.NewMessage("rusage_minor_pgfaults", m.tags, m.meta, map[string]interface{}{"value": rusage.Minflt}, timestamp)
+			y, err = lp.NewMessage("rusage_minor_pgfaults", m.tags, m.meta, map[string]any{"value": rusage.Minflt}, timestamp)
 			if err == nil {
 				output <- y
 			}
--- a/collectors/slurmCgroupMetric.go
+++ b/collectors/slurmCgroupMetric.go
@@ -11,8 +11,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 type SlurmJobData struct {
@@ -50,8 +50,7 @@ func ParseCPUs(cpuset string) ([]int, error) {
 		return result, nil
 	}

-	ranges := strings.Split(cpuset, ",")
-	for _, r := range ranges {
+	for r := range strings.SplitSeq(cpuset, ",") {
 		if strings.Contains(r, "-") {
 			parts := strings.Split(r, "-")
 			if len(parts) != 2 {
@@ -80,9 +79,10 @@ func ParseCPUs(cpuset string) ([]int, error) {
 }

 func GetAllCPUs() ([]int, error) {
-	data, err := os.ReadFile("/sys/devices/system/cpu/online")
+	cpuOnline := "/sys/devices/system/cpu/online"
+	data, err := os.ReadFile(cpuOnline)
 	if err != nil {
-		return nil, fmt.Errorf("failed to read /sys/devices/system/cpu/online: %v", err)
+		return nil, fmt.Errorf("failed to read file \"%s\": %w", cpuOnline, err)
 	}
 	return ParseCPUs(strings.TrimSpace(string(data)))
 }
@@ -103,18 +103,22 @@ func (m *SlurmCgroupCollector) readFile(path string) ([]byte, error) {
 func (m *SlurmCgroupCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "SlurmCgroupCollector"
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	m.parallel = true
-	m.meta = map[string]string{"source": m.name, "group": "SLURM"}
-	m.tags = map[string]string{"type": "hwthread"}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "SLURM"}
+	m.tags = map[string]string{
+		"type": "hwthread"}
 	m.cpuUsed = make(map[int]bool)
 	m.cgroupBase = defaultCgroupBase

 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
-			cclog.ComponentError(m.name, "Error reading config:", err.Error())
-			return err
+			return fmt.Errorf("%s Init(): Error reading JSON config: %w", m.name, err)
 		}
 		m.excludeMetrics = make(map[string]struct{})
 		for _, metric := range m.config.ExcludeMetrics {
@@ -129,19 +133,16 @@ func (m *SlurmCgroupCollector) Init(config json.RawMessage) error {
 	if !m.useSudo {
 		user, err := user.Current()
 		if err != nil {
-			cclog.ComponentError(m.name, "Failed to get current user:", err.Error())
-			return err
+			return fmt.Errorf("%s Init(): Failed to get current user: %w", m.name, err)
 		}
 		if user.Uid != "0" {
-			cclog.ComponentError(m.name, "Reading cgroup files requires root privileges (or enable use_sudo in config)")
-			return fmt.Errorf("not root")
+			return fmt.Errorf("%s Init(): Reading cgroup files requires root privileges (or enable use_sudo in config)", m.name)
 		}
 	}

 	m.allCPUs, err = GetAllCPUs()
 	if err != nil {
-		cclog.ComponentError(m.name, "Error reading online CPUs:", err.Error())
-		return err
+		return fmt.Errorf("%s Init(): Error reading online CPUs: %w", m.name, err)
 	}

 	m.init = true
@@ -158,7 +159,9 @@ func (m *SlurmCgroupCollector) ReadJobData(jobdir string) (SlurmJobData, error)
 		CpuSet:           []int{},
 	}

-	cg := func(f string) string { return filepath.Join(m.cgroupBase, jobdir, f) }
+	cg := func(f string) string {
+		return filepath.Join(m.cgroupBase, jobdir, f)
+	}

 	memUsage, err := m.readFile(cg("memory.current"))
 	if err == nil {
@@ -207,8 +210,8 @@ func (m *SlurmCgroupCollector) ReadJobData(jobdir string) (SlurmJobData, error)
 			}
 		}
 		if usageUsec > 0 {
-			jobdata.CpuUsageUser = (userUsec * 100 / usageUsec)
-			jobdata.CpuUsageSys = (systemUsec * 100 / usageUsec)
+			jobdata.CpuUsageUser = (userUsec * 100.0 / usageUsec)
+			jobdata.CpuUsageSys = (systemUsec * 100.0 / usageUsec)
 		}
 	}

@@ -251,12 +254,18 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes
 			for _, cpu := range jobdata.CpuSet {
 				coreTags := map[string]string{
 					"type":    "hwthread",
-					"type-id": fmt.Sprintf("%d", cpu),
+					"type-id": strconv.Itoa(cpu),
 				}

 				if coreCount > 0 && !m.isExcluded("job_mem_used") {
 					memPerCore := jobdata.MemoryUsage / coreCount
-					if y, err := lp.NewMessage("job_mem_used", coreTags, m.meta, map[string]interface{}{"value": memPerCore}, timestamp); err == nil {
+					if y, err := lp.NewMessage(
+						"job_mem_used",
+						coreTags,
+						m.meta,
+						map[string]any{
+							"value": memPerCore},
+						timestamp); err == nil {
 						y.AddMeta("unit", "Bytes")
 						output <- y
 					}
@@ -264,7 +273,13 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes

 				if coreCount > 0 && !m.isExcluded("job_max_mem_used") {
 					maxMemPerCore := jobdata.MaxMemoryUsage / coreCount
-					if y, err := lp.NewMessage("job_max_mem_used", coreTags, m.meta, map[string]interface{}{"value": maxMemPerCore}, timestamp); err == nil {
+					if y, err := lp.NewMessage(
+						"job_max_mem_used",
+						coreTags,
+						m.meta,
+						map[string]any{
+							"value": maxMemPerCore},
+						timestamp); err == nil {
 						y.AddMeta("unit", "Bytes")
 						output <- y
 					}
@@ -272,7 +287,13 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes

 				if coreCount > 0 && !m.isExcluded("job_mem_limit") {
 					limitPerCore := jobdata.LimitMemoryUsage / coreCount
-					if y, err := lp.NewMessage("job_mem_limit", coreTags, m.meta, map[string]interface{}{"value": limitPerCore}, timestamp); err == nil {
+					if y, err := lp.NewMessage(
+						"job_mem_limit",
+						coreTags,
+						m.meta,
+						map[string]any{
+							"value": limitPerCore},
+						timestamp); err == nil {
 						y.AddMeta("unit", "Bytes")
 						output <- y
 					}
@@ -280,7 +301,13 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes

 				if coreCount > 0 && !m.isExcluded("job_user_cpu") {
 					cpuUserPerCore := jobdata.CpuUsageUser / coreCount
-					if y, err := lp.NewMessage("job_user_cpu", coreTags, m.meta, map[string]interface{}{"value": cpuUserPerCore}, timestamp); err == nil {
+					if y, err := lp.NewMessage(
+						"job_user_cpu",
+						coreTags,
+						m.meta,
+						map[string]any{
+							"value": cpuUserPerCore},
+						timestamp); err == nil {
 						y.AddMeta("unit", "%")
 						output <- y
 					}
@@ -288,7 +315,13 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes

 				if coreCount > 0 && !m.isExcluded("job_sys_cpu") {
 					cpuSysPerCore := jobdata.CpuUsageSys / coreCount
-					if y, err := lp.NewMessage("job_sys_cpu", coreTags, m.meta, map[string]interface{}{"value": cpuSysPerCore}, timestamp); err == nil {
+					if y, err := lp.NewMessage(
+						"job_sys_cpu",
+						coreTags,
+						m.meta,
+						map[string]any{
+							"value": cpuSysPerCore},
+						timestamp); err == nil {
 						y.AddMeta("unit", "%")
 						output <- y
 					}
@@ -303,39 +336,57 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes
 		if !m.cpuUsed[cpu] {
 			coreTags := map[string]string{
 				"type":    "hwthread",
-				"type-id": fmt.Sprintf("%d", cpu),
+				"type-id": strconv.Itoa(cpu),
 			}

 			if !m.isExcluded("job_mem_used") {
-				if y, err := lp.NewMessage("job_mem_used", coreTags, m.meta, map[string]interface{}{"value": 0}, timestamp); err == nil {
+				if y, err := lp.NewMessage(
+					"job_mem_used",
+					coreTags,
+					m.meta,
+					map[string]any{
+						"value": 0},
+					timestamp); err == nil {
 					y.AddMeta("unit", "Bytes")
 					output <- y
 				}
 			}

 			if !m.isExcluded("job_max_mem_used") {
-				if y, err := lp.NewMessage("job_max_mem_used", coreTags, m.meta, map[string]interface{}{"value": 0}, timestamp); err == nil {
+				if y, err := lp.NewMessage(
+					"job_max_mem_used",
+					coreTags,
+					m.meta,
+					map[string]any{
+						"value": 0},
+					timestamp); err == nil {
 					y.AddMeta("unit", "Bytes")
 					output <- y
 				}
 			}

 			if !m.isExcluded("job_mem_limit") {
-				if y, err := lp.NewMessage("job_mem_limit", coreTags, m.meta, map[string]interface{}{"value": 0}, timestamp); err == nil {
+				if y, err := lp.NewMessage(
+					"job_mem_limit",
+					coreTags,
+					m.meta,
+					map[string]any{
+						"value": 0},
+					timestamp); err == nil {
 					y.AddMeta("unit", "Bytes")
 					output <- y
 				}
 			}

 			if !m.isExcluded("job_user_cpu") {
-				if y, err := lp.NewMessage("job_user_cpu", coreTags, m.meta, map[string]interface{}{"value": 0}, timestamp); err == nil {
+				if y, err := lp.NewMessage("job_user_cpu", coreTags, m.meta, map[string]any{"value": 0}, timestamp); err == nil {
 					y.AddMeta("unit", "%")
 					output <- y
 				}
 			}

 			if !m.isExcluded("job_sys_cpu") {
-				if y, err := lp.NewMessage("job_sys_cpu", coreTags, m.meta, map[string]interface{}{"value": 0}, timestamp); err == nil {
+				if y, err := lp.NewMessage("job_sys_cpu", coreTags, m.meta, map[string]any{"value": 0}, timestamp); err == nil {
 					y.AddMeta("unit", "%")
 					output <- y
 				}
--- a/collectors/tempMetric.go
+++ b/collectors/tempMetric.go
@@ -16,8 +16,8 @@ import (
 	"strings"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 // See: https://www.kernel.org/doc/html/latest/hwmon/sysfs-interface.html
@@ -58,11 +58,13 @@ func (m *TempCollector) Init(config json.RawMessage) error {

 	m.name = "TempCollector"
 	m.parallel = true
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
-			return err
+			return fmt.Errorf("%s Init(): failed to unmarshal JSON config: %w", m.name, err)
 		}
 	}

@@ -78,10 +80,10 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 	globPattern := filepath.Join("/sys/class/hwmon", "*", "temp*_input")
 	inputFiles, err := filepath.Glob(globPattern)
 	if err != nil {
-		return fmt.Errorf("unable to glob files with pattern '%s': %v", globPattern, err)
+		return fmt.Errorf("%s Init(): unable to glob files with pattern '%s': %w", m.name, globPattern, err)
 	}
 	if inputFiles == nil {
-		return fmt.Errorf("unable to find any files with pattern '%s'", globPattern)
+		return fmt.Errorf("%s Init(): unable to find any files with pattern '%s'", m.name, globPattern)
 	}

 	// Get sensor name for each temperature sensor file
@@ -117,7 +119,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 			sensor.metricName = sensor.label
 		}
 		sensor.metricName = strings.ToLower(sensor.metricName)
-		sensor.metricName = strings.Replace(sensor.metricName, " ", "_", -1)
+		sensor.metricName = strings.ReplaceAll(sensor.metricName, " ", "_")
 		// Add temperature prefix, if required
 		if !strings.Contains(sensor.metricName, "temp") {
 			sensor.metricName = "temp_" + sensor.metricName
@@ -170,7 +172,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {

 	// Empty sensors map
 	if len(m.sensors) == 0 {
-		return fmt.Errorf("no temperature sensors found")
+		return fmt.Errorf("%s Init(): no temperature sensors found", m.name)
 	}

 	// Finished initialization
@@ -201,7 +203,7 @@ func (m *TempCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 			sensor.metricName,
 			sensor.tags,
 			m.meta,
-			map[string]interface{}{"value": x},
+			map[string]any{"value": x},
 			time.Now(),
 		)
 		if err == nil {
@@ -214,7 +216,7 @@ func (m *TempCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 				sensor.maxTempName,
 				sensor.tags,
 				m.meta,
-				map[string]interface{}{"value": sensor.maxTemp},
+				map[string]any{"value": sensor.maxTemp},
 				time.Now(),
 			)
 			if err == nil {
@@ -228,7 +230,7 @@ func (m *TempCollector) Read(interval time.Duration, output chan lp.CCMessage) {
 				sensor.critTempName,
 				sensor.tags,
 				m.meta,
-				map[string]interface{}{"value": sensor.critTemp},
+				map[string]any{"value": sensor.critTemp},
 				time.Now(),
 			)
 			if err == nil {
--- a/collectors/topprocsMetric.go
+++ b/collectors/topprocsMetric.go
@@ -9,14 +9,13 @@ package collectors

 import (
 	"encoding/json"
-	"errors"
 	"fmt"
-	"log"
 	"os/exec"
 	"strings"
 	"time"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 )

 const MAX_NUM_PROCS = 10
@@ -36,12 +35,17 @@ func (m *TopProcsCollector) Init(config json.RawMessage) error {
 	var err error
 	m.name = "TopProcsCollector"
 	m.parallel = true
-	m.tags = map[string]string{"type": "node"}
-	m.meta = map[string]string{"source": m.name, "group": "TopProcs"}
+	m.tags = map[string]string{
+		"type": "node",
+	}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "TopProcs",
+	}
 	if len(config) > 0 {
 		err = json.Unmarshal(config, &m.config)
 		if err != nil {
-			return err
+			return fmt.Errorf("%s Init(): json.Unmarshal() failed: %w", m.name, err)
 		}
 	} else {
 		m.config.Num_procs = int(DEFAULT_NUM_PROCS)
@@ -49,12 +53,13 @@ func (m *TopProcsCollector) Init(config json.RawMessage) error {
 	if m.config.Num_procs <= 0 || m.config.Num_procs > MAX_NUM_PROCS {
 		return fmt.Errorf("num_procs option must be set in 'topprocs' config (range: 1-%d)", MAX_NUM_PROCS)
 	}
-	m.setup()
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
 	command := exec.Command("ps", "-Ao", "comm", "--sort=-pcpu")
-	command.Wait()
 	_, err = command.Output()
 	if err != nil {
-		return errors.New("failed to execute command")
+		return fmt.Errorf("%s Init(): failed to get output from command: %w", m.name, err)
 	}
 	m.init = true
 	return nil
@@ -65,17 +70,24 @@ func (m *TopProcsCollector) Read(interval time.Duration, output chan lp.CCMessag
 		return
 	}
 	command := exec.Command("ps", "-Ao", "comm", "--sort=-pcpu")
-	command.Wait()
 	stdout, err := command.Output()
 	if err != nil {
-		log.Print(m.name, err)
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("Read(): Failed to read output from command \"%s\": %v", command.String(), err))
 		return
 	}

 	lines := strings.Split(string(stdout), "\n")
 	for i := 1; i < m.config.Num_procs+1; i++ {
 		name := fmt.Sprintf("topproc%d", i)
-		y, err := lp.NewMessage(name, m.tags, m.meta, map[string]interface{}{"value": string(lines[i])}, time.Now())
+		y, err := lp.NewMessage(
+			name,
+			m.tags,
+			m.meta,
+			map[string]any{
+				"value": lines[i]},
+			time.Now())
 		if err == nil {
 			output <- y
 		}
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -4,7 +4,7 @@ The configuration of the CC metric collector consists of five configuration file

 ## Global configuration

-The global file contains the paths to the other four files and some global options. 
+The global file contains the paths to the other four files and some global options. You can find examples in `example_configs`.

 ```json
 {
--- a/example-configs/collectors.json
+++ b/example-configs/collectors.json
@@ -1,6 +1,19 @@
 {
    "cpufreq": {},
    "cpufreq_cpuinfo": {},
+    "cpustat": {
+        "exclude_metrics": [
+            "cpu_idle"
+        ]
+    },
+    "diskstat": {
+        "exclude_metrics": [
+            "disk_total"
+        ],
+        "exclude_mounts": [
+            "slurm-tmpfs"
+        ]
+    },
    "gpfs": {
        "exclude_filesystem": [
            "test_fs"
@@ -21,6 +34,8 @@
    },
    "numastats": {},
    "nvidia": {},
+    "schedstat": {
+    },
    "tempstat": {
        "report_max_temperature": true,
        "report_critical_temperature": true,
--- a/example-configs/config.json
+++ b/example-configs/config.json
--- a/example-configs/receivers.json
+++ b/example-configs/receivers.json
--- a/example-configs/router.json
+++ b/example-configs/router.json
--- a/example-configs/sinks.json
+++ b/example-configs/sinks.json
--- a/go.mod
+++ b/go.mod
@@ -3,43 +3,43 @@ module github.com/ClusterCockpit/cc-metric-collector
 go 1.24.0

 require (
-	github.com/ClusterCockpit/cc-lib v0.10.1
+	github.com/ClusterCockpit/cc-lib/v2 v2.2.1
 	github.com/ClusterCockpit/go-rocm-smi v0.3.0
 	github.com/NVIDIA/go-nvml v0.13.0-1
 	github.com/PaesslerAG/gval v1.2.4
 	github.com/fsnotify/fsnotify v1.9.0
 	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/tklauser/go-sysconf v0.3.15
+	github.com/tklauser/go-sysconf v0.3.16
 	golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1
-	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b
-	golang.org/x/sys v0.37.0
+	golang.org/x/sys v0.41.0
 )

 require (
 	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/expr-lang/expr v1.17.6 // indirect
+	github.com/expr-lang/expr v1.17.7 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/mux v1.8.1 // indirect
 	github.com/influxdata/influxdb-client-go/v2 v2.14.0 // indirect
 	github.com/influxdata/line-protocol/v2 v2.2.1 // indirect
-	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/compress v1.18.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nats-io/nats.go v1.46.1 // indirect
-	github.com/nats-io/nkeys v0.4.11 // indirect
+	github.com/nats-io/nats.go v1.48.0 // indirect
+	github.com/nats-io/nkeys v0.4.12 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
-	github.com/oapi-codegen/runtime v1.1.1 // indirect
+	github.com/oapi-codegen/runtime v1.1.2 // indirect
 	github.com/prometheus/client_golang v1.23.2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.66.1 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
+	github.com/prometheus/procfs v0.19.2 // indirect
 	github.com/santhosh-tekuri/jsonschema/v5 v5.3.1 // indirect
-	github.com/shopspring/decimal v1.3.1 // indirect
+	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/stmcginnis/gofish v0.20.0 // indirect
-	github.com/tklauser/numcpus v0.10.0 // indirect
-	go.yaml.in/yaml/v2 v2.4.2 // indirect
-	golang.org/x/crypto v0.42.0 // indirect
-	golang.org/x/net v0.43.0 // indirect
-	google.golang.org/protobuf v1.36.8 // indirect
+	github.com/tklauser/numcpus v0.11.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/ClusterCockpit/cc-lib v0.10.1 h1:tjGEH8mFGgznYxO8BKLiiar0eZR1Oytk8x5iIQHZR5s=
-github.com/ClusterCockpit/cc-lib v0.10.1/go.mod h1:nvTZuxFCTwlos8I1rL5O1RPab7vRtkU8E/PGiaF6pQA=
+github.com/ClusterCockpit/cc-lib/v2 v2.2.1 h1:iCVas+Jc61zFH5S2VG3H1sc7tsn+U4lOJwUYjYZEims=
+github.com/ClusterCockpit/cc-lib/v2 v2.2.1/go.mod h1:JuxMAuEOaLLNEnnL9U3ejha8kMvsSatLdKPZEgJw6iw=
 github.com/ClusterCockpit/go-rocm-smi v0.3.0 h1:1qZnSpG7/NyLtc7AjqnUL9Jb8xtqG1nMVgp69rJfaR8=
 github.com/ClusterCockpit/go-rocm-smi v0.3.0/go.mod h1:+I3UMeX3OlizXDf1WpGD43W4KGZZGVSGmny6rTeOnWA=
 github.com/NVIDIA/go-nvml v0.11.6-0/go.mod h1:hy7HYeQy335x6nEss0Ne3PYqleRa6Ct+VKD9RQ4nyFs=
@@ -10,8 +10,8 @@ github.com/PaesslerAG/gval v1.2.4/go.mod h1:XRFLwvmkTEdYziLdaCeCa5ImcGVrfQbeNUbV
 github.com/PaesslerAG/jsonpath v0.1.0 h1:gADYeifvlqK3R3i2cR5B4DGgxLXIPb3TRTH1mGi0jPI=
 github.com/PaesslerAG/jsonpath v0.1.0/go.mod h1:4BzmtoM/PI8fPO4aQGIusjGxGir2BzcV0grWtFzq1Y8=
 github.com/RaveNoX/go-jsoncommentstrip v1.0.0/go.mod h1:78ihd09MekBnJnxpICcwzCMzGrKSKYe4AqU6PDYYpjk=
-github.com/antithesishq/antithesis-sdk-go v0.4.3-default-no-op h1:+OSa/t11TFhqfrX0EOSqQBDJ0YlpmK0rDSiB19dg9M0=
-github.com/antithesishq/antithesis-sdk-go v0.4.3-default-no-op/go.mod h1:IUpT2DPAKh6i/YhSbt6Gl3v2yvUZjmKncl7U91fup7E=
+github.com/antithesishq/antithesis-sdk-go v0.5.0-default-no-op h1:Ucf+QxEKMbPogRO5guBNe5cgd9uZgfoJLOYs8WWhtjM=
+github.com/antithesishq/antithesis-sdk-go v0.5.0-default-no-op/go.mod h1:IUpT2DPAKh6i/YhSbt6Gl3v2yvUZjmKncl7U91fup7E=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0 h1:axGnT1gRIfimI7gJifB699GoE/oq+F2MU7Dml6nw9rQ=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0/go.mod h1:lvDnEdqiQrp0O42VQGgmlKpxL1AP2+08jFMw88y4klk=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -23,8 +23,8 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/expr-lang/expr v1.17.6 h1:1h6i8ONk9cexhDmowO/A64VPxHScu7qfSl2k8OlINec=
-github.com/expr-lang/expr v1.17.6/go.mod h1:8/vRC7+7HBzESEqt5kKpYXxrxkr31SaO8r40VO/1IT4=
+github.com/expr-lang/expr v1.17.7 h1:Q0xY/e/2aCIp8g9s/LGvMDCC5PxYlvHgDZRQ4y16JX8=
+github.com/expr-lang/expr v1.17.7/go.mod h1:8/vRC7+7HBzESEqt5kKpYXxrxkr31SaO8r40VO/1IT4=
 github.com/frankban/quicktest v1.11.0/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
 github.com/frankban/quicktest v1.11.2/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
 github.com/frankban/quicktest v1.13.0 h1:yNZif1OkDfNoDfb9zZa9aXIpejNR4F23Wely0c+Qdqk=
@@ -35,8 +35,8 @@ github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
-github.com/google/go-tpm v0.9.5 h1:ocUmnDebX54dnW+MQWGQRbdaAcJELsa6PqZhJ48KwVU=
-github.com/google/go-tpm v0.9.5/go.mod h1:h9jEsEECg7gtLis0upRBQU+GhYVH6jMjrFxI8u6bVUY=
+github.com/google/go-tpm v0.9.7 h1:u89J4tUUeDTlH8xxC3CTW7OHZjbjKoHdQ9W7gCUhtxA=
+github.com/google/go-tpm v0.9.7/go.mod h1:h9jEsEECg7gtLis0upRBQU+GhYVH6jMjrFxI8u6bVUY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
@@ -53,8 +53,8 @@ github.com/influxdata/line-protocol/v2 v2.1.0/go.mod h1:QKw43hdUBg3GTk2iC3iyCxks
 github.com/influxdata/line-protocol/v2 v2.2.1 h1:EAPkqJ9Km4uAxtMRgUubJyqAr6zgWM0dznKMLRauQRE=
 github.com/influxdata/line-protocol/v2 v2.2.1/go.mod h1:DmB3Cnh+3oxmG6LOBIxce4oaL4CPj3OmMPgvauXh+tM=
 github.com/juju/gnuflag v0.0.0-20171113085948-2ce1bb71843d/go.mod h1:2PavIy+JPciBPrBUjwbNvtwB6RQlve+hkpll6QSNmOE=
-github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
+github.com/klauspost/compress v1.18.2 h1:iiPHWW0YrcFgpBYhsA6D1+fqHssJscY/Tm/y2Uqnapk=
+github.com/klauspost/compress v1.18.2/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
@@ -64,39 +64,40 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
-github.com/minio/highwayhash v1.0.3 h1:kbnuUMoHYyVl7szWjSxJnxw11k2U709jqFPPmIUyD6Q=
-github.com/minio/highwayhash v1.0.3/go.mod h1:GGYsuwP/fPD6Y9hMiXuapVvlIUEhFhMTh0rxU3ik1LQ=
+github.com/minio/highwayhash v1.0.4-0.20251030100505-070ab1a87a76 h1:KGuD/pM2JpL9FAYvBrnBBeENKZNh6eNtjqytV6TYjnk=
+github.com/minio/highwayhash v1.0.4-0.20251030100505-070ab1a87a76/go.mod h1:GGYsuwP/fPD6Y9hMiXuapVvlIUEhFhMTh0rxU3ik1LQ=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/nats-io/jwt/v2 v2.8.0 h1:K7uzyz50+yGZDO5o772eRE7atlcSEENpL7P+b74JV1g=
 github.com/nats-io/jwt/v2 v2.8.0/go.mod h1:me11pOkwObtcBNR8AiMrUbtVOUGkqYjMQZ6jnSdVUIA=
-github.com/nats-io/nats-server/v2 v2.12.0 h1:OIwe8jZUqJFrh+hhiyKu8snNib66qsx806OslqJuo74=
-github.com/nats-io/nats-server/v2 v2.12.0/go.mod h1:nr8dhzqkP5E/lDwmn+A2CvQPMd1yDKXQI7iGg3lAvww=
-github.com/nats-io/nats.go v1.46.1 h1:bqQ2ZcxVd2lpYI97xYASeRTY3I5boe/IVmuUDPitHfo=
-github.com/nats-io/nats.go v1.46.1/go.mod h1:iRWIPokVIFbVijxuMQq4y9ttaBTMe0SFdlZfMDd+33g=
-github.com/nats-io/nkeys v0.4.11 h1:q44qGV008kYd9W1b1nEBkNzvnWxtRSQ7A8BoqRrcfa0=
-github.com/nats-io/nkeys v0.4.11/go.mod h1:szDimtgmfOi9n25JpfIdGw12tZFYXqhGxjhVxsatHVE=
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 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
-github.com/oapi-codegen/runtime v1.1.1 h1:EXLHh0DXIJnWhdRPN2w4MXAzFyE4CskzhNLUmtpMYro=
-github.com/oapi-codegen/runtime v1.1.1/go.mod h1:SK9X900oXmPWilYR5/WKPzt3Kqxn/uS/+lbpREv+eCg=
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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
 github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
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-github.com/prometheus/common v0.66.1/go.mod h1:gcaUsgf3KfRSwHY4dIMXLPV0K/Wg1oZ8+SbZk/HH/dA=
-github.com/prometheus/procfs v0.16.1 h1:hZ15bTNuirocR6u0JZ6BAHHmwS1p8B4P6MRqxtzMyRg=
-github.com/prometheus/procfs v0.16.1/go.mod h1:teAbpZRB1iIAJYREa1LsoWUXykVXA1KlTmWl8x/U+Is=
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 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/santhosh-tekuri/jsonschema/v5 v5.3.1 h1:lZUw3E0/J3roVtGQ+SCrUrg3ON6NgVqpn3+iol9aGu4=
 github.com/santhosh-tekuri/jsonschema/v5 v5.3.1/go.mod h1:uToXkOrWAZ6/Oc07xWQrPOhJotwFIyu2bBVN41fcDUY=
-github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
 github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
+github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
+github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
 github.com/spkg/bom v0.0.0-20160624110644-59b7046e48ad/go.mod h1:qLr4V1qq6nMqFKkMo8ZTx3f+BZEkzsRUY10Xsm2mwU0=
 github.com/stmcginnis/gofish v0.20.0 h1:hH2V2Qe898F2wWT1loApnkDUrXXiLKqbSlMaH3Y1n08=
 github.com/stmcginnis/gofish v0.20.0/go.mod h1:PzF5i8ecRG9A2ol8XT64npKUunyraJ+7t0kYMpQAtqU=
@@ -104,30 +105,30 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
-github.com/tklauser/go-sysconf v0.3.15 h1:VE89k0criAymJ/Os65CSn1IXaol+1wrsFHEB8Ol49K4=
-github.com/tklauser/go-sysconf v0.3.15/go.mod h1:Dmjwr6tYFIseJw7a3dRLJfsHAMXZ3nEnL/aZY+0IuI4=
-github.com/tklauser/numcpus v0.10.0 h1:18njr6LDBk1zuna922MgdjQuJFjrdppsZG60sHGfjso=
-github.com/tklauser/numcpus v0.10.0/go.mod h1:BiTKazU708GQTYF4mB+cmlpT2Is1gLk7XVuEeem8LsQ=
+github.com/tklauser/go-sysconf v0.3.16 h1:frioLaCQSsF5Cy1jgRBrzr6t502KIIwQ0MArYICU0nA=
+github.com/tklauser/go-sysconf v0.3.16/go.mod h1:/qNL9xxDhc7tx3HSRsLWNnuzbVfh3e7gh/BmM179nYI=
+github.com/tklauser/numcpus v0.11.0 h1:nSTwhKH5e1dMNsCdVBukSZrURJRoHbSEQjdEbY+9RXw=
+github.com/tklauser/numcpus v0.11.0/go.mod h1:z+LwcLq54uWZTX0u/bGobaV34u6V7KNlTZejzM6/3MQ=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-go.yaml.in/yaml/v2 v2.4.2 h1:DzmwEr2rDGHl7lsFgAHxmNz/1NlQ7xLIrlN2h5d1eGI=
-go.yaml.in/yaml/v2 v2.4.2/go.mod h1:081UH+NErpNdqlCXm3TtEran0rJZGxAYx9hb/ELlsPU=
+go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=
+go.yaml.in/yaml/v2 v2.4.3/go.mod h1:zSxWcmIDjOzPXpjlTTbAsKokqkDNAVtZO0WOMiT90s8=
 golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1 h1:P7S/GeHBAFEZIYp0ePPs2kHXoazz8q2KsyxHyQVGCJg=
 golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1/go.mod h1:9CWpnTUmlQkfdpdutA1nNf4iE5lAVt3QZOu0Z6hahBE=
-golang.org/x/crypto v0.42.0 h1:chiH31gIWm57EkTXpwnqf8qeuMUi0yekh6mT2AvFlqI=
-golang.org/x/crypto v0.42.0/go.mod h1:4+rDnOTJhQCx2q7/j6rAN5XDw8kPjeaXEUR2eL94ix8=
-golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b h1:M2rDM6z3Fhozi9O7NWsxAkg/yqS/lQJ6PmkyIV3YP+o=
-golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b/go.mod h1:3//PLf8L/X+8b4vuAfHzxeRUl04Adcb341+IGKfnqS8=
-golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
-golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
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 golang.org/x/sys v0.0.0-20210122093101-04d7465088b8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
-golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/time v0.13.0 h1:eUlYslOIt32DgYD6utsuUeHs4d7AsEYLuIAdg7FlYgI=
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 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.36.8 h1:xHScyCOEuuwZEc6UtSOvPbAT4zRh0xcNRYekJwfqyMc=
-google.golang.org/protobuf v1.36.8/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
--- a/internal/metricAggregator/metricAggregator.go
+++ b/internal/metricAggregator/metricAggregator.go
@@ -10,15 +10,17 @@ package metricAggregator
 import (
 	"context"
 	"fmt"
+	"maps"
 	"math"
 	"os"
+	"slices"
 	"strings"
 	"sync"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"

 	"github.com/PaesslerAG/gval"
@@ -36,7 +38,7 @@ type MetricAggregatorIntervalConfig struct {

 type metricAggregator struct {
 	functions []*MetricAggregatorIntervalConfig
-	constants map[string]interface{}
+	constants map[string]any
 	language  gval.Language
 	output    chan lp.CCMessage
 }
@@ -84,7 +86,7 @@ var evaluables = struct {
 func (c *metricAggregator) Init(output chan lp.CCMessage) error {
 	c.output = output
 	c.functions = make([]*MetricAggregatorIntervalConfig, 0)
-	c.constants = make(map[string]interface{})
+	c.constants = make(map[string]any)

 	// add constants like hostname, numSockets, ... to constants list
 	// Set hostname
@@ -120,10 +122,8 @@ func (c *metricAggregator) Init(output chan lp.CCMessage) error {
 }

 func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics []lp.CCMessage) {
-	vars := make(map[string]interface{})
-	for k, v := range c.constants {
-		vars[k] = v
-	}
+	vars := make(map[string]any)
+	maps.Copy(vars, c.constants)
 	vars["starttime"] = starttime
 	vars["endtime"] = endtime
 	for _, f := range c.functions {
@@ -137,7 +137,6 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 		matches := make([]lp.CCMessage, 0)
 		for _, m := range metrics {
 			vars["metric"] = m
-			//value, err := gval.Evaluate(f.Condition, vars, c.language)
 			value, err := f.gvalCond.EvalBool(context.Background(), vars)
 			if err != nil {
 				cclog.ComponentError("MetricCache", "COLLECT", f.Name, "COND", f.Condition, ":", err.Error())
@@ -171,22 +170,22 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 		// Check, that only values of one type were collected
 		countValueTypes := 0
 		if len(valuesFloat64) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if len(valuesFloat32) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if len(valuesInt) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if len(valuesInt32) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if len(valuesInt64) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if len(valuesBool) > 0 {
-			countValueTypes += 1
+			countValueTypes++
 		}
 		if countValueTypes > 1 {
 			cclog.ComponentError("MetricCache", "Collected values of different types")
@@ -263,15 +262,15 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 			var m lp.CCMessage
 			switch t := value.(type) {
 			case float64:
-				m, err = lp.NewMessage(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
+				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			case float32:
-				m, err = lp.NewMessage(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
+				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			case int:
-				m, err = lp.NewMessage(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
+				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			case int64:
-				m, err = lp.NewMessage(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
+				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			case string:
-				m, err = lp.NewMessage(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
+				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			default:
 				cclog.ComponentError("MetricCache", "Gval returned invalid type", t, "skipping metric", f.Name)
 			}
@@ -329,18 +328,21 @@ func (c *metricAggregator) AddAggregation(name, function, condition string, tags
 }

 func (c *metricAggregator) DeleteAggregation(name string) error {
-	for i, agg := range c.functions {
-		if agg.Name == name {
+	i := slices.IndexFunc(
+		c.functions,
+		func(agg *MetricAggregatorIntervalConfig) bool {
+			return agg.Name == name
+		})
+	if i == -1 {
+		return fmt.Errorf("no aggregation for metric name %s", name)
+	}
 	copy(c.functions[i:], c.functions[i+1:])
 	c.functions[len(c.functions)-1] = nil
 	c.functions = c.functions[:len(c.functions)-1]
 	return nil
-		}
-	}
-	return fmt.Errorf("no aggregation for metric name %s", name)
 }

-func (c *metricAggregator) AddConstant(name string, value interface{}) {
+func (c *metricAggregator) AddConstant(name string, value any) {
 	c.constants[name] = value
 }

@@ -348,11 +350,11 @@ func (c *metricAggregator) DelConstant(name string) {
 	delete(c.constants, name)
 }

-func (c *metricAggregator) AddFunction(name string, function func(args ...interface{}) (interface{}, error)) {
+func (c *metricAggregator) AddFunction(name string, function func(args ...any) (any, error)) {
 	c.language = gval.NewLanguage(c.language, gval.Function(name, function))
 }

-func EvalBoolCondition(condition string, params map[string]interface{}) (bool, error) {
+func EvalBoolCondition(condition string, params map[string]any) (bool, error) {
 	evaluables.mutex.Lock()
 	evaluable, ok := evaluables.mapping[condition]
 	evaluables.mutex.Unlock()
--- a/internal/metricAggregator/metricAggregatorFunctions.go
+++ b/internal/metricAggregator/metricAggregatorFunctions.go
@@ -11,10 +11,10 @@ import (
 	"errors"
 	"fmt"
 	"regexp"
+	"slices"
+	"strconv"
 	"strings"

-	"golang.org/x/exp/slices"
-
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 )

@@ -34,7 +34,7 @@ func sumAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error
 }

 // Sum up values
-func sumfunc(args interface{}) (interface{}, error) {
+func sumfunc(args any) (any, error) {

 	var err error
 	switch values := args.(type) {
@@ -63,7 +63,7 @@ func minAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error
 }

 // Get the minimum value
-func minfunc(args interface{}) (interface{}, error) {
+func minfunc(args any) (any, error) {
 	switch values := args.(type) {
 	case []float64:
 		return minAnyType(values)
@@ -84,12 +84,12 @@ func avgAnyType[T float64 | float32 | int | int32 | int64](values []T) (float64,
 	if len(values) == 0 {
 		return 0.0, errors.New("average function requires at least one argument")
 	}
-	sum, err := sumAnyType[T](values)
+	sum, err := sumAnyType(values)
 	return float64(sum) / float64(len(values)), err
 }

 // Get the average or mean value
-func avgfunc(args interface{}) (interface{}, error) {
+func avgfunc(args any) (any, error) {
 	switch values := args.(type) {
 	case []float64:
 		return avgAnyType(values)
@@ -114,7 +114,7 @@ func maxAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error
 }

 // Get the maximum value
-func maxfunc(args interface{}) (interface{}, error) {
+func maxfunc(args any) (any, error) {
 	switch values := args.(type) {
 	case []float64:
 		return maxAnyType(values)
@@ -146,7 +146,7 @@ func medianAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, er
 }

 // Get the median value
-func medianfunc(args interface{}) (interface{}, error) {
+func medianfunc(args any) (any, error) {
 	switch values := args.(type) {
 	case []float64:
 		return medianAnyType(values)
@@ -167,9 +167,9 @@ func medianfunc(args interface{}) (interface{}, error) {
 * Get number of values in list. Returns always an int
 */

-func lenfunc(args interface{}) (interface{}, error) {
+func lenfunc(args any) (any, error) {
 	var err error = nil
-	var length int = 0
+	length := 0
 	switch values := args.(type) {
 	case []float64:
 		length = len(values)
@@ -181,13 +181,7 @@ func lenfunc(args interface{}) (interface{}, error) {
 		length = len(values)
 	case []int32:
 		length = len(values)
-	case float64:
-		err = errors.New("function 'len' can only be applied on arrays and strings")
-	case float32:
-		err = errors.New("function 'len' can only be applied on arrays and strings")
-	case int:
-		err = errors.New("function 'len' can only be applied on arrays and strings")
-	case int64:
+	case float64, float32, int, int64:
 		err = errors.New("function 'len' can only be applied on arrays and strings")
 	case string:
 		length = len(values)
@@ -197,13 +191,13 @@ func lenfunc(args interface{}) (interface{}, error) {

 /*
 * Check if a values is in a list
- * In constrast to most of the other functions, this one is an infix operator for
+ * In contrast to most of the other functions, this one is an infix operator for
 * - substring matching: `"abc" in "abcdef"` -> true
 * - substring matching with int casting: `3 in "abd3"` -> true
 * - search for an int in an int list: `3 in getCpuList()` -> true (if you have more than 4 CPU hardware threads)
 */

-func infunc(a interface{}, b interface{}) (interface{}, error) {
+func infunc(a any, b any) (any, error) {
 	switch match := a.(type) {
 	case string:
 		switch total := b.(type) {
@@ -213,13 +207,9 @@ func infunc(a interface{}, b interface{}) (interface{}, error) {
 	case int:
 		switch total := b.(type) {
 		case []int:
-			for _, x := range total {
-				if x == match {
-					return true, nil
-				}
-			}
+			return slices.Contains(total, match), nil
 		case string:
-			smatch := fmt.Sprintf("%d", match)
+			smatch := strconv.Itoa(match)
 			return strings.Contains(total, smatch), nil
 		}

@@ -233,12 +223,12 @@ func infunc(a interface{}, b interface{}) (interface{}, error) {
 * format keys \d = %d, \w = %d, ... Not sure how to fix this
 */

-func matchfunc(args ...interface{}) (interface{}, error) {
+func matchfunc(args ...any) (any, error) {
 	switch match := args[0].(type) {
 	case string:
 		switch total := args[1].(type) {
 		case string:
-			smatch := strings.Replace(match, "%", "\\", -1)
+			smatch := strings.ReplaceAll(match, "%", "\\")
 			regex, err := regexp.Compile(smatch)
 			if err != nil {
 				return false, err
@@ -255,7 +245,7 @@ func matchfunc(args ...interface{}) (interface{}, error) {
 */

 // for a given cpuid, it returns the core id
-func getCpuCoreFunc(args interface{}) (interface{}, error) {
+func getCpuCoreFunc(args any) (any, error) {
 	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadCore(cpuid), nil
@@ -264,7 +254,7 @@ func getCpuCoreFunc(args interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the socket id
-func getCpuSocketFunc(args interface{}) (interface{}, error) {
+func getCpuSocketFunc(args any) (any, error) {
 	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadSocket(cpuid), nil
@@ -273,7 +263,7 @@ func getCpuSocketFunc(args interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the id of the NUMA node
-func getCpuNumaDomainFunc(args interface{}) (interface{}, error) {
+func getCpuNumaDomainFunc(args any) (any, error) {
 	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadNumaDomain(cpuid), nil
@@ -282,7 +272,7 @@ func getCpuNumaDomainFunc(args interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the id of the CPU die
-func getCpuDieFunc(args interface{}) (interface{}, error) {
+func getCpuDieFunc(args any) (any, error) {
 	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadDie(cpuid), nil
@@ -291,7 +281,7 @@ func getCpuDieFunc(args interface{}) (interface{}, error) {
 }

 // for a given core id, it returns the list of cpuids
-func getCpuListOfCoreFunc(args interface{}) (interface{}, error) {
+func getCpuListOfCoreFunc(args any) (any, error) {
 	cpulist := make([]int, 0)
 	switch in := args.(type) {
 	case int:
@@ -305,7 +295,7 @@ func getCpuListOfCoreFunc(args interface{}) (interface{}, error) {
 }

 // for a given socket id, it returns the list of cpuids
-func getCpuListOfSocketFunc(args interface{}) (interface{}, error) {
+func getCpuListOfSocketFunc(args any) (any, error) {
 	cpulist := make([]int, 0)
 	switch in := args.(type) {
 	case int:
@@ -319,7 +309,7 @@ func getCpuListOfSocketFunc(args interface{}) (interface{}, error) {
 }

 // for a given id of a NUMA domain, it returns the list of cpuids
-func getCpuListOfNumaDomainFunc(args interface{}) (interface{}, error) {
+func getCpuListOfNumaDomainFunc(args any) (any, error) {
 	cpulist := make([]int, 0)
 	switch in := args.(type) {
 	case int:
@@ -333,7 +323,7 @@ func getCpuListOfNumaDomainFunc(args interface{}) (interface{}, error) {
 }

 // for a given CPU die id, it returns the list of cpuids
-func getCpuListOfDieFunc(args interface{}) (interface{}, error) {
+func getCpuListOfDieFunc(args any) (any, error) {
 	cpulist := make([]int, 0)
 	switch in := args.(type) {
 	case int:
@@ -347,14 +337,14 @@ func getCpuListOfDieFunc(args interface{}) (interface{}, error) {
 }

 // wrapper function to get a list of all cpuids of the node
-func getCpuListOfNode() (interface{}, error) {
+func getCpuListOfNode() (any, error) {
 	return topo.HwthreadList(), nil
 }

 // helper function to get the cpuid list for a CCMetric type tag set (type and type-id)
 // since there is no access to the metric data in the function, is should be called like
 // `getCpuListOfType()`
-func getCpuListOfType(args ...interface{}) (interface{}, error) {
+func getCpuListOfType(args ...any) (any, error) {
 	cpulist := make([]int, 0)
 	switch typ := args[0].(type) {
 	case string:
--- a/internal/metricRouter/metricCache.go
+++ b/internal/metricRouter/metricCache.go
@@ -11,9 +11,9 @@ import (
 	"sync"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
 	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
@@ -51,7 +51,7 @@ type MetricCache interface {
 }

 func (c *metricCache) Init(output chan lp.CCMessage, ticker mct.MultiChanTicker, wg *sync.WaitGroup, numPeriods int) error {
-	var err error = nil
+	var err error
 	c.done = make(chan bool)
 	c.wg = wg
 	c.ticker = ticker
@@ -137,12 +137,12 @@ func (c *metricCache) Add(metric lp.CCMessage) {
 		p := c.intervals[c.curPeriod]
 		if p.numMetrics < p.sizeMetrics {
 			p.metrics[p.numMetrics] = metric
-			p.numMetrics = p.numMetrics + 1
+			p.numMetrics++
 			p.stopstamp = metric.Time()
 		} else {
 			p.metrics = append(p.metrics, metric)
-			p.numMetrics = p.numMetrics + 1
-			p.sizeMetrics = p.sizeMetrics + 1
+			p.numMetrics++
+			p.sizeMetrics++
 			p.stopstamp = metric.Time()
 		}
 		c.lock.Unlock()
@@ -161,8 +161,8 @@ func (c *metricCache) DeleteAggregation(name string) error {
 // is the current one, index=1 the last interval and so on. Returns and empty array if a wrong index
 // is given (negative index, index larger than configured number of total intervals, ...)
 func (c *metricCache) GetPeriod(index int) (time.Time, time.Time, []lp.CCMessage) {
-	var start time.Time = time.Now()
-	var stop time.Time = time.Now()
+	start := time.Now()
+	stop := time.Now()
 	var metrics []lp.CCMessage
 	if index >= 0 && index < c.numPeriods {
 		pindex := c.curPeriod - index
--- a/internal/metricRouter/metricRouter.go
+++ b/internal/metricRouter/metricRouter.go
@@ -10,15 +10,16 @@ package metricRouter
 import (
 	"encoding/json"
 	"fmt"
+	"maps"
 	"os"
 	"strings"
 	"sync"
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"

-	lp "github.com/ClusterCockpit/cc-lib/ccMessage"
-	mp "github.com/ClusterCockpit/cc-lib/messageProcessor"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
+	mp "github.com/ClusterCockpit/cc-lib/v2/messageProcessor"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
 	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
@@ -107,10 +108,8 @@ func (r *metricRouter) Init(ticker mct.MultiChanTicker, wg *sync.WaitGroup, rout
 		cclog.ComponentError("MetricRouter", err.Error())
 		return err
 	}
-	r.maxForward = 1
-	if r.config.MaxForward > r.maxForward {
-		r.maxForward = r.config.MaxForward
-	}
+	r.maxForward = max(1, r.config.MaxForward)
+
 	if r.config.NumCacheIntervals > 0 {
 		r.cache, err = NewCache(r.cache_input, r.ticker, &r.cachewg, r.config.NumCacheIntervals)
 		if err != nil {
@@ -118,60 +117,80 @@ func (r *metricRouter) Init(ticker mct.MultiChanTicker, wg *sync.WaitGroup, rout
 			return err
 		}
 		for _, agg := range r.config.IntervalAgg {
-			r.cache.AddAggregation(agg.Name, agg.Function, agg.Condition, agg.Tags, agg.Meta)
+			err = r.cache.AddAggregation(agg.Name, agg.Function, agg.Condition, agg.Tags, agg.Meta)
+			if err != nil {
+				return fmt.Errorf("MetricCache AddAggregation() failed: %w", err)
+			}
 		}
 	}
 	p, err := mp.NewMessageProcessor()
 	if err != nil {
-		return fmt.Errorf("initialization of message processor failed: %v", err.Error())
+		return fmt.Errorf("MessageProcessor NewMessageProcessor() failed: %w", err)
 	}
 	r.mp = p

 	if len(r.config.MessageProcessor) > 0 {
 		err = r.mp.FromConfigJSON(r.config.MessageProcessor)
 		if err != nil {
-			return fmt.Errorf("failed parsing JSON for message processor: %v", err.Error())
+			return fmt.Errorf("MessageProcessor FromConfigJSON() failed: %w", err)
 		}
 	}
 	for _, mname := range r.config.DropMetrics {
-		r.mp.AddDropMessagesByName(mname)
+		err = r.mp.AddDropMessagesByName(mname)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddDropMessagesByName() failed: %w", err)
+		}
 	}
 	for _, cond := range r.config.DropMetricsIf {
-		r.mp.AddDropMessagesByCondition(cond)
+		err = r.mp.AddDropMessagesByCondition(cond)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddDropMessagesByCondition() failed: %w", err)
+		}
 	}
 	for _, data := range r.config.AddTags {
 		cond := data.Condition
 		if cond == "*" {
 			cond = "true"
 		}
-		r.mp.AddAddTagsByCondition(cond, data.Key, data.Value)
+		err = r.mp.AddAddTagsByCondition(cond, data.Key, data.Value)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddAddTagsByCondition() failed: %w", err)
+		}
 	}
 	for _, data := range r.config.DelTags {
 		cond := data.Condition
 		if cond == "*" {
 			cond = "true"
 		}
-		r.mp.AddDeleteTagsByCondition(cond, data.Key, data.Value)
+		err = r.mp.AddDeleteTagsByCondition(cond, data.Key, data.Value)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddDeleteTagsByCondition() failed: %w", err)
+		}
 	}
 	for oldname, newname := range r.config.RenameMetrics {
-		r.mp.AddRenameMetricByName(oldname, newname)
+		err = r.mp.AddRenameMetricByName(oldname, newname)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddRenameMetricByName() failed: %w", err)
+		}
 	}
 	for metricName, prefix := range r.config.ChangeUnitPrefix {
-		r.mp.AddChangeUnitPrefix(fmt.Sprintf("name == '%s'", metricName), prefix)
+		err = r.mp.AddChangeUnitPrefix(fmt.Sprintf("name == '%s'", metricName), prefix)
+		if err != nil {
+			return fmt.Errorf("MessageProcessor AddChangeUnitPrefix() failed: %w", err)
+		}
 	}
 	r.mp.SetNormalizeUnits(r.config.NormalizeUnits)

-	r.mp.AddAddTagsByCondition("true", r.config.HostnameTagName, r.hostname)
+	err = r.mp.AddAddTagsByCondition("true", r.config.HostnameTagName, r.hostname)
+	if err != nil {
+		return fmt.Errorf("MessageProcessor AddAddTagsByCondition() failed: %w", err)
+	}

-	// r.config.dropMetrics = make(map[string]bool)
-	// for _, mname := range r.config.DropMetrics {
-	// 	r.config.dropMetrics[mname] = true
-	// }
 	return nil
 }

-func getParamMap(point lp.CCMessage) map[string]interface{} {
-	params := make(map[string]interface{})
+func getParamMap(point lp.CCMessage) map[string]any {
+	params := make(map[string]any)
 	params["metric"] = point
 	params["name"] = point.Name()
 	for key, value := range point.Tags() {
@@ -180,14 +199,12 @@ func getParamMap(point lp.CCMessage) map[string]interface{} {
 	for key, value := range point.Meta() {
 		params[key] = value
 	}
-	for key, value := range point.Fields() {
-		params[key] = value
-	}
+	maps.Copy(params, point.Fields())
 	params["timestamp"] = point.Time()
 	return params
 }

-// DoAddTags adds a tag when condition is fullfiled
+// DoAddTags adds a tag when condition is fulfilled
 func (r *metricRouter) DoAddTags(point lp.CCMessage) {
 	var conditionMatches bool
 	for _, m := range r.config.AddTags {
@@ -209,83 +226,6 @@ func (r *metricRouter) DoAddTags(point lp.CCMessage) {
 	}
 }

-// DoDelTags removes a tag when condition is fullfiled
-// func (r *metricRouter) DoDelTags(point lp.CCMessage) {
-// 	var conditionMatches bool
-// 	for _, m := range r.config.DelTags {
-// 		if m.Condition == "*" {
-// 			// Condition is always matched
-// 			conditionMatches = true
-// 		} else {
-// 			// Evaluate condition
-// 			var err error
-// 			conditionMatches, err = agg.EvalBoolCondition(m.Condition, getParamMap(point))
-// 			if err != nil {
-// 				cclog.ComponentError("MetricRouter", err.Error())
-// 				conditionMatches = false
-// 			}
-// 		}
-// 		if conditionMatches {
-// 			point.RemoveTag(m.Key)
-// 		}
-// 	}
-// }
-
-// Conditional test whether a metric should be dropped
-// func (r *metricRouter) dropMetric(point lp.CCMessage) bool {
-// 	// Simple drop check
-// 	if conditionMatches, ok := r.config.dropMetrics[point.Name()]; ok {
-// 		return conditionMatches
-// 	}
-
-// 	// Checking the dropping conditions
-// 	for _, m := range r.config.DropMetricsIf {
-// 		conditionMatches, err := agg.EvalBoolCondition(m, getParamMap(point))
-// 		if err != nil {
-// 			cclog.ComponentError("MetricRouter", err.Error())
-// 			conditionMatches = false
-// 		}
-// 		if conditionMatches {
-// 			return conditionMatches
-// 		}
-// 	}
-
-// 	// No dropping condition met
-// 	return false
-// }
-
-// func (r *metricRouter) prepareUnit(point lp.CCMessage) bool {
-// 	if r.config.NormalizeUnits {
-// 		if in_unit, ok := point.GetMeta("unit"); ok {
-// 			u := units.NewUnit(in_unit)
-// 			if u.Valid() {
-// 				point.AddMeta("unit", u.Short())
-// 			}
-// 		}
-// 	}
-// 	if newP, ok := r.config.ChangeUnitPrefix[point.Name()]; ok {
-
-// 		newPrefix := units.NewPrefix(newP)
-
-// 		if in_unit, ok := point.GetMeta("unit"); ok && newPrefix != units.InvalidPrefix {
-// 			u := units.NewUnit(in_unit)
-// 			if u.Valid() {
-// 				cclog.ComponentDebug("MetricRouter", "Change prefix to", newP, "for metric", point.Name())
-// 				conv, out_unit := units.GetUnitPrefixFactor(u, newPrefix)
-// 				if conv != nil && out_unit.Valid() {
-// 					if val, ok := point.GetField("value"); ok {
-// 						point.AddField("value", conv(val))
-// 						point.AddMeta("unit", out_unit.Short())
-// 					}
-// 				}
-// 			}
-
-// 		}
-// 	}
-
-// 	return true
-// }
-
 // Start starts the metric router
 func (r *metricRouter) Start() {
 	// start timer if configured
@@ -301,28 +241,7 @@ func (r *metricRouter) Start() {
 		cclog.ComponentDebug("MetricRouter", "DONE")
 	}

-	// Forward takes a received metric, adds or deletes tags
-	// and forwards it to the output channels
-	// forward := func(point lp.CCMessage) {
-	// 	cclog.ComponentDebug("MetricRouter", "FORWARD", point)
-	// 	r.DoAddTags(point)
-	// 	r.DoDelTags(point)
-	// 	name := point.Name()
-	// 	if new, ok := r.config.RenameMetrics[name]; ok {
-	// 		point.SetName(new)
-	// 		point.AddMeta("oldname", name)
-	// 		r.DoAddTags(point)
-	// 		r.DoDelTags(point)
-	// 	}
-
-	// 	r.prepareUnit(point)
-
-	// 	for _, o := range r.outputs {
-	// 		o <- point
-	// 	}
-	// }
-
-	// Foward message received from collector channel
+	// Forward message received from collector channel
 	coll_forward := func(p lp.CCMessage) {
 		// receive from metric collector
 		//p.AddTag(r.config.HostnameTagName, r.hostname)
@@ -335,11 +254,6 @@ func (r *metricRouter) Start() {
 				o <- m
 			}
 		}
-		// if !r.dropMetric(p) {
-		// 	for _, o := range r.outputs {
-		// 		o <- point
-		// 	}
-		// }
 		// even if the metric is dropped, it is stored in the cache for
 		// aggregations
 		if r.config.NumCacheIntervals > 0 {
@@ -359,9 +273,6 @@ func (r *metricRouter) Start() {
 				o <- m
 			}
 		}
-		// if !r.dropMetric(p) {
-		// 	forward(p)
-		// }
 	}

 	// Forward message received from cache channel
--- a/pkg/ccTopology/ccTopology.go
+++ b/pkg/ccTopology/ccTopology.go
@@ -13,11 +13,11 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"slices"
 	"strconv"
 	"strings"

-	cclogger "github.com/ClusterCockpit/cc-lib/ccLogger"
-	"golang.org/x/exp/slices"
+	cclogger "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
 )

 const SYSFS_CPUBASE = `/sys/devices/system/cpu`
@@ -51,14 +51,13 @@ var cache struct {
 func fileToInt(path string) int {
 	buffer, err := os.ReadFile(path)
 	if err != nil {
-		log.Print(err)
-		cclogger.ComponentError("ccTopology", "fileToInt", "Reading", path, ":", err.Error())
+		cclogger.ComponentError("ccTopology", fmt.Sprintf("fileToInt(): Reading \"%s\": %v", path, err))
 		return -1
 	}
 	stringBuffer := strings.TrimSpace(string(buffer))
 	id, err := strconv.Atoi(stringBuffer)
 	if err != nil {
-		cclogger.ComponentError("ccTopology", "fileToInt", "Parsing", path, ":", stringBuffer, err.Error())
+		cclogger.ComponentError("ccTopology", fmt.Sprintf("fileToInt(): Parsing \"%s\": %v", stringBuffer, err))
 		return -1
 	}
 	return id
@@ -80,7 +79,7 @@ func fileToList(path string) []int {
 	// Create list
 	list := make([]int, 0)
 	stringBuffer := strings.TrimSpace(string(buffer))
-	for _, valueRangeString := range strings.Split(stringBuffer, ",") {
+	for valueRangeString := range strings.SplitSeq(stringBuffer, ",") {
 		valueRange := strings.Split(valueRangeString, "-")
 		switch len(valueRange) {
 		case 1:
@@ -304,20 +303,19 @@ func GetTypeList(topology_type string) []int {
 }

 func GetTypeId(hwt HwthreadEntry, topology_type string) (int, error) {
-	var err error = nil
 	switch topology_type {
 	case "node":
-		return 0, err
+		return 0, nil
 	case "socket":
-		return hwt.Socket, err
+		return hwt.Socket, nil
 	case "die":
-		return hwt.Die, err
+		return hwt.Die, nil
 	case "memoryDomain":
-		return hwt.NumaDomain, err
+		return hwt.NumaDomain, nil
 	case "core":
-		return hwt.Core, err
+		return hwt.Core, nil
 	case "hwthread":
-		return hwt.CpuID, err
+		return hwt.CpuID, nil
 	}
 	return -1, fmt.Errorf("unknown topology type '%s'", topology_type)
 }
--- a/pkg/multiChanTicker/multiChanTicker.go
+++ b/pkg/multiChanTicker/multiChanTicker.go
@@ -10,7 +10,7 @@ package multiChanTicker
 import (
 	"time"

-	cclog "github.com/ClusterCockpit/cc-lib/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
 )

 type multiChanTicker struct {
@@ -21,7 +21,7 @@ type multiChanTicker struct {

 type MultiChanTicker interface {
 	Init(duration time.Duration)
-	AddChannel(chan time.Time)
+	AddChannel(channel chan time.Time)
 	Close()
 }

--- a/scripts/cc-metric-collector.spec
+++ b/scripts/cc-metric-collector.spec
@@ -30,11 +30,11 @@ make

 %install
 install -Dpm 0750 %{name} %{buildroot}%{_bindir}/%{name}
-install -Dpm 0600 config.json %{buildroot}%{_sysconfdir}/%{name}/%{name}.json
-install -Dpm 0600 collectors.json %{buildroot}%{_sysconfdir}/%{name}/collectors.json
-install -Dpm 0600 sinks.json %{buildroot}%{_sysconfdir}/%{name}/sinks.json
-install -Dpm 0600 receivers.json %{buildroot}%{_sysconfdir}/%{name}/receivers.json
-install -Dpm 0600 router.json %{buildroot}%{_sysconfdir}/%{name}/router.json
+install -Dpm 0600 example-configs/config.json %{buildroot}%{_sysconfdir}/%{name}/%{name}.json
+install -Dpm 0600 example-configs/collectors.json %{buildroot}%{_sysconfdir}/%{name}/collectors.json
+install -Dpm 0600 example-configs/sinks.json %{buildroot}%{_sysconfdir}/%{name}/sinks.json
+install -Dpm 0600 example-configs/receivers.json %{buildroot}%{_sysconfdir}/%{name}/receivers.json
+install -Dpm 0600 example-configs/router.json %{buildroot}%{_sysconfdir}/%{name}/router.json
 install -Dpm 0644 scripts/%{name}.service %{buildroot}%{_unitdir}/%{name}.service
 install -Dpm 0600 scripts/%{name}.config %{buildroot}%{_sysconfdir}/default/%{name}
 install -Dpm 0644 scripts/%{name}.sysusers %{buildroot}%{_sysusersdir}/%{name}.conf
Author	SHA1	Message	Date
Holger Obermaier	d715f7aa07	Preallocate slices of known length	2026-02-12 15:07:39 +01:00
Holger Obermaier	555ba9504a	* Replace fmt.Sprintf("%d", i)) by strconv.Itoa(i) * Correct misspelled words * Remove unused code * Break up very long lines into multiple lines * lp.NewMessage -> lp.NewMetric	2026-02-12 14:31:01 +01:00
Holger Obermaier	309bc32a24	Enable linter: errorlint	2026-02-11 15:59:01 +01:00
Holger Obermaier	0b1f88b8a6	Fixed: interface method AddChannel must have all named params (inamedparam)	2026-02-11 15:55:14 +01:00
Holger Obermaier	3181f81db1	Suggestions from the gocritic linter	2026-02-11 14:56:21 +01:00
Holger Obermaier	18e2518660	Fix derivative values should be float	2026-02-11 14:27:08 +01:00
Holger Obermaier	2cca8d6ac0	Revert wrong use of slices.Delete()	2026-02-11 14:02:47 +01:00
Holger Obermaier	6bfdd6ff17	Wrap errors so that they can be unwrapped	2026-02-11 13:51:58 +01:00
Holger Obermaier	ca95494a83	Use cclog for logging	2026-02-11 12:15:58 +01:00
Holger Obermaier	e512f3255c	Use cclog for logging	2026-02-11 12:01:47 +01:00
Holger Obermaier	5b08183d54	Removed unused code	2026-02-11 11:45:08 +01:00
dependabot[bot]	b69281dae6	Bump github.com/ClusterCockpit/cc-lib/v2 from 2.1.0 to 2.2.1 (#193 ) Bumps [github.com/ClusterCockpit/cc-lib/v2](https://github.com/ClusterCockpit/cc-lib) from 2.1.0 to 2.2.1. - [Release notes](https://github.com/ClusterCockpit/cc-lib/releases) - [Commits](https://github.com/ClusterCockpit/cc-lib/compare/v2.1.0...v2.2.1) --- updated-dependencies: - dependency-name: github.com/ClusterCockpit/cc-lib/v2 dependency-version: 2.2.1 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-02-10 13:45:21 +01:00
boesr	053eb27463	fixes rpm config paths (#190 )	2026-02-10 13:42:36 +01:00
dependabot[bot]	665db57a11	Bump golang.org/x/sys from 0.40.0 to 0.41.0 (#194 ) Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.40.0 to 0.41.0. - [Commits](https://github.com/golang/sys/compare/v0.40.0...v0.41.0) --- updated-dependencies: - dependency-name: golang.org/x/sys dependency-version: 0.41.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-02-10 13:40:56 +01:00
Holger Obermaier	fc297854d2	Golangci modernize fixes (#196 ) * Fix: Loop can be simplified using slices.Contains * Fix: for loop can be modernized using range over int * Fix: interface{} can be replaced by any * Fix: Replace m[k]=v loop with maps.Copy * Run all linters with golangci-lint	2026-02-10 13:33:04 +01:00
Holger Obermaier	cca0d23efa	Golangci lint fixes (#195 ) * Add golangci-lin as make target * Fix: could omit type ... from declaration; it will be inferred from the right-hand side (staticcheck) * Fix func intArrayContains is unused (unused) * Fix: could use strings.ReplaceAll instead (staticcheck) * Fix: could expand call to math.Pow (staticcheck) * Fix: could use tagged switch on `...` (staticcheck) * Fix: Error return value of `...` is not checked (errcheck) * Fix: ineffectual assignment to err (ineffassign) * Fix: There is no need to wait for command completion * Add cpustat, diskstat and schedstat config * Use slices to exclude metrics * Replaced stringArrayContains by slices.Contains * Replace m[k]=v loop with maps.Copy * Use module slices from the standard library. Remove use of golang.org/x/exp/slices * Use SplitSeq and max to modernize code	2026-02-09 14:51:31 +01:00
Holger Obermaier	7cff283001	Update ci (#192 ) Add static analysis with GolangCI-Lint, govet and staticcheck	2026-01-23 14:39:39 +01:00
Holger Obermaier	fa45d0d973	Update ci (#191 ) * Add UBI 10 build * Add Almalinux 10 build * Use Appstream Repository from Red Hat Universal Base Image * Use Appstream Repository from Almalinux	2026-01-21 15:20:12 +01:00
Holger Obermaier	e70fd658f0	Update CI pipeline (#189 ) * Updated Action "checkout" and "Setup golang" * Update go-toolset to latest version * Add golang-race dependency * Update download-artifact and upload-artifact	2026-01-15 14:35:43 +01:00
Holger Obermaier	c58790cd54	Switch to cc-lib v2	2026-01-15 11:30:50 +01:00
dependabot[bot]	67ee09ffef	Bump golang.org/x/sys from 0.38.0 to 0.39.0 Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.38.0 to 0.39.0. - [Commits](https://github.com/golang/sys/compare/v0.38.0...v0.39.0) --- updated-dependencies: - dependency-name: golang.org/x/sys dependency-version: 0.39.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>	2025-12-22 11:59:49 +01:00
dependabot[bot]	7f575269eb	Bump github.com/ClusterCockpit/cc-lib from 0.11.0 to 1.0.2 Bumps [github.com/ClusterCockpit/cc-lib](https://github.com/ClusterCockpit/cc-lib) from 0.11.0 to 1.0.2. - [Release notes](https://github.com/ClusterCockpit/cc-lib/releases) - [Commits](https://github.com/ClusterCockpit/cc-lib/compare/v0.11.0...v1.0.2) --- updated-dependencies: - dependency-name: github.com/ClusterCockpit/cc-lib dependency-version: 1.0.2 dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>	2025-12-22 11:59:33 +01:00
dependabot[bot]	c8cd11796c	Bump github.com/ClusterCockpit/cc-lib from 0.10.1 to 0.11.0 Bumps [github.com/ClusterCockpit/cc-lib](https://github.com/ClusterCockpit/cc-lib) from 0.10.1 to 0.11.0. - [Release notes](https://github.com/ClusterCockpit/cc-lib/releases) - [Commits](https://github.com/ClusterCockpit/cc-lib/compare/v0.10.1...v0.11.0) --- updated-dependencies: - dependency-name: github.com/ClusterCockpit/cc-lib dependency-version: 0.11.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>	2025-12-08 12:37:40 +01:00
Roland Pabel	92f6c75d23	Gpfs collector restructure (#182 ) * restructure metric similiar to lustre collector * make sure total metric is not saved if none of the base metrics are present * reuse variable * corrections per ho-ob review	2025-12-01 14:52:18 +01:00
Thomas Roehl	62d40cfe00	Update workflow with latest golang RPM URLs	2025-11-26 08:36:12 +01:00
Thomas Roehl	ece1a52082	Move example configurations and update docs. Fixed #150	2025-11-26 08:24:23 +01:00
dependabot[bot]	398aa207a9	Bump github.com/tklauser/go-sysconf from 0.3.15 to 0.3.16 Bumps [github.com/tklauser/go-sysconf](https://github.com/tklauser/go-sysconf) from 0.3.15 to 0.3.16. - [Release notes](https://github.com/tklauser/go-sysconf/releases) - [Commits](https://github.com/tklauser/go-sysconf/compare/v0.3.15...v0.3.16) --- updated-dependencies: - dependency-name: github.com/tklauser/go-sysconf dependency-version: 0.3.16 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com>	2025-11-26 08:22:54 +01:00
dependabot[bot]	b51bf592d0	Bump golang.org/x/sys from 0.37.0 to 0.38.0 Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.37.0 to 0.38.0. - [Commits](https://github.com/golang/sys/compare/v0.37.0...v0.38.0) --- updated-dependencies: - dependency-name: golang.org/x/sys dependency-version: 0.38.0 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>	2025-11-10 12:19:48 +01:00
Thomas Roehl	6243203880	Fix startup error of iostat collector	2025-10-20 17:06:10 +02:00
Thomas Roehl	c7c9f8c273	Fix max clock metrics	2025-10-20 17:05:59 +02:00