Update ipmiMetric.go

* Add initial version of Zenodo project file

* Orcid ID added

* Update .zenodo.json

Co-authored-by: Holger Obermaier <holger.obermaier@kit.edu>

.github/workflows/Release.yml

@@ -27,7 +27,9 @@ jobs:
 
     # Use dnf to install development packages
     - name: Install development packages
-      run: dnf --assumeyes group install "Development Tools" "RPM Development Tools"
+      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
@@ -41,9 +43,11 @@ jobs:
     # Use dnf to install build dependencies
     - name: Install build dependencies
       run: |
-        dnf --assumeyes install 'dnf-command(builddep)'
-        dnf --assumeyes install which
-        dnf --assumeyes builddep scripts/cc-metric-collector.spec
+          wget -q http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.18.2-1.module_el8.7.0+1173+5d37c0fd.noarch.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm
+          rpm -i go*.rpm
 
     - name: RPM build MetricCollector
       id: rpmbuild
@@ -93,7 +97,7 @@ jobs:
 
     # Use dnf to install development packages
     - name: Install development packages
-      run: dnf --assumeyes --disableplugin=subscription-manager install rpm-build go-srpm-macros rpm-build-libs rpm-libs gcc make python38 git
+      run: dnf --assumeyes --disableplugin=subscription-manager install rpm-build go-srpm-macros rpm-build-libs rpm-libs gcc make python38 git wget openssl-devel diffutils delve which
 
     # Checkout git repository and submodules
     # fetch-depth must be 0 to use git describe
@@ -106,7 +110,12 @@ jobs:
 
     # Use dnf to install build dependencies
     - name: Install build dependencies
-      run: dnf --assumeyes --disableplugin=subscription-manager builddep scripts/cc-metric-collector.spec
+      run: |
+          wget -q http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.18.2-1.module_el8.7.0+1173+5d37c0fd.noarch.rpm \
+                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm
+          rpm -i go*.rpm
 
     - name: RPM build MetricCollector
       id: rpmbuild
@@ -124,13 +133,63 @@ jobs:
         name: cc-metric-collector SRPM for UBI 8
         path: ${{ steps.rpmbuild.outputs.SRPM }}
 
+  #
+  # Build on Ubuntu 20.04 using official go package
+  #
+  Ubuntu-focal-build:
+    runs-on: ubuntu-latest
+    container: ubuntu:20.04
+    # The job outputs link to the outputs of the 'debrename' step
+    # Only job outputs can be used in child jobs
+    outputs:
+      deb : ${{steps.debrename.outputs.DEB}}
+    steps:
+    # Use apt to install development packages
+    - name: Install development packages
+      run: |
+          apt update && apt --assume-yes upgrade
+          apt --assume-yes install build-essential sed git wget bash
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+        fetch-depth: 0
+    # Use official golang package
+    - name: Install Golang
+      run: |
+          wget -q https://go.dev/dl/go1.19.1.linux-amd64.tar.gz
+          tar -C /usr/local -xzf go1.19.1.linux-amd64.tar.gz
+          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
+          go version
+    - name: DEB build MetricCollector
+      id: dpkg-build
+      run: |
+          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
+          make DEB
+    - name: Rename DEB (add '_ubuntu20.04')
+      id: debrename
+      run: |
+        OLD_DEB_NAME=$(echo "${{steps.dpkg-build.outputs.DEB}}" | rev | cut -d '.' -f 2- | rev)
+        NEW_DEB_FILE="${OLD_DEB_NAME}_ubuntu20.04.deb"
+        mv "${{steps.dpkg-build.outputs.DEB}}" "${NEW_DEB_FILE}"
+        echo "::set-output name=DEB::${NEW_DEB_FILE}"
+    # See: https://github.com/actions/upload-artifact
+    - name: Save DEB as artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: cc-metric-collector DEB for Ubuntu 20.04
+        path: ${{ steps.debrename.outputs.DEB }}
+
   #
   # Create release with fresh RPMs
   #
   Release:
     runs-on: ubuntu-latest
     # We need the RPMs, so add dependency
-    needs: [AlmaLinux-RPM-build, UBI-8-RPM-build]
+    needs: [AlmaLinux-RPM-build, UBI-8-RPM-build, Ubuntu-focal-build]
 
     steps:
     # See: https://github.com/actions/download-artifact
@@ -152,6 +211,11 @@ jobs:
       with:
         name: cc-metric-collector SRPM for UBI 8
 
+    - name: Download Ubuntu 20.04 DEB
+      uses: actions/download-artifact@v2
+      with:
+        name: cc-metric-collector DEB for Ubuntu 20.04
+
     # The download actions do not publish the name of the downloaded file,
     # so we re-use the job outputs of the parent jobs. The files are all
     # downloaded to the current folder.
@@ -165,14 +229,17 @@ jobs:
         ALMA_85_SRPM=$(basename "${{ needs.AlmaLinux-RPM-build.outputs.srpm}}")
         UBI_8_RPM=$(basename "${{ needs.UBI-8-RPM-build.outputs.rpm}}")
         UBI_8_SRPM=$(basename "${{ needs.UBI-8-RPM-build.outputs.srpm}}")
+        U_2004_DEB=$(basename "${{ needs.Ubuntu-focal-build.outputs.deb}}")
         echo "ALMA_85_RPM::${ALMA_85_RPM}"
         echo "ALMA_85_SRPM::${ALMA_85_SRPM}"
         echo "UBI_8_RPM::${UBI_8_RPM}"
         echo "UBI_8_SRPM::${UBI_8_SRPM}"
+        echo "U_2004_DEB::${U_2004_DEB}"
         echo "::set-output name=ALMA_85_RPM::${ALMA_85_RPM}"
         echo "::set-output name=ALMA_85_SRPM::${ALMA_85_SRPM}"
         echo "::set-output name=UBI_8_RPM::${UBI_8_RPM}"
         echo "::set-output name=UBI_8_SRPM::${UBI_8_SRPM}"
+        echo "::set-output name=U_2004_DEB::${U_2004_DEB}"
 
     # See: https://github.com/softprops/action-gh-release
     - name: Release
@@ -185,3 +252,4 @@ jobs:
          ${{ steps.files.outputs.ALMA_85_SRPM }}
          ${{ steps.files.outputs.UBI_8_RPM }}
          ${{ steps.files.outputs.UBI_8_SRPM }}
+         ${{ steps.files.outputs.U_2004_DEB }}

.github/workflows/runonce.yml

@@ -34,10 +34,10 @@ jobs:
       run: ./cc-metric-collector --once --config .github/ci-config.json
 
   #
-  # Job build-1-17
-  # Build on latest Ubuntu using golang version 1.17 
+  # Job build-1-19
+  # Build on latest Ubuntu using golang version 1.19
   #
-  build-1-17:
+  build-1-19:
     runs-on: ubuntu-latest
     steps:
     # See: https://github.com/marketplace/actions/checkout
@@ -51,33 +51,7 @@ jobs:
     - name: Setup Golang
       uses: actions/setup-go@v3
       with:
-        go-version: '1.17.7'
-
-    - name: Build MetricCollector
-      run: make
-
-    - name: Run MetricCollector once
-      run: ./cc-metric-collector --once --config .github/ci-config.json
-
-  #
-  # Job build-1-16
-  # Build on latest Ubuntu using golang version 1.16
-  #
-  build-1-16:
-    runs-on: ubuntu-latest
-    steps:
-    # See: https://github.com/marketplace/actions/checkout
-    # Checkout git repository and submodules
-    - name: Checkout
-      uses: actions/checkout@v2
-      with:
-        submodules: recursive
-
-    # See: https://github.com/marketplace/actions/setup-go-environment
-    - name: Setup Golang
-      uses: actions/setup-go@v3
-      with:
-        go-version: '1.16.7' # The version AlmaLinux 8.5 uses
+        go-version: '1.19'
 
     - name: Build MetricCollector
       run: make

.zenodo.json

@@ -0,0 +1,29 @@
+{
+  "title": "cc-metric-collector",
+  "description": "Monitoring agent for ClusterCockpit.",
+  "creators": [
+    {
+      "affiliation": "Regionales Rechenzentrum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg",
+      "name": "Thomas Gruber",
+      "orcid": "0000-0001-5560-6964"
+    },
+    {
+      "affiliation": "Steinbuch Centre for Computing, Karlsruher Institut für Technologie",
+      "name": "Holger Obermaier",
+      "orcid": "0000-0002-6830-6626"
+    }
+  ],
+  "upload_type": "software",
+  "license": "MIT",
+  "access_right": "open",
+  "keywords": [
+    "performance-monitoring",
+    "cluster-monitoring",
+    "open-source"
+  ],
+  "communities": [
+    {
+      "identifier": "clustercockpit"
+    }
+  ]
+}

Makefile

@@ -22,14 +22,7 @@ GOBIN = $(shell which go)
 .PHONY: all
 all: $(APP)
 
-$(APP): $(GOSRC)
-	if [ "$(shell $(GOBIN) version | cut -d' ' -f 3 | cut -d '.' -f1-2)" = "go1.16" ]; then \
-		echo "1.16"; \
-		cp go.mod.1.16 go.mod; \
-	else \
-		echo "1.17+"; \
-		cp go.mod.1.17+ go.mod; \
-	fi
+$(APP): $(GOSRC) go.mod
 	make -C collectors
 	$(GOBIN) get
 	$(GOBIN) build -o $(APP) $(GOSRC_APP)
@@ -119,7 +112,9 @@ DEB: scripts/cc-metric-collector.deb.control $(APP)
 	#@mkdir --parents --verbose $$DEBIANDIR
 	@CONTROLFILE="$${BASEDIR}/scripts/cc-metric-collector.deb.control"
 	@COMMITISH="HEAD"
+	@git describe --tags --abbrev=0 $${COMMITISH}
 	@VERS=$$(git describe --tags --abbrev=0 $${COMMITISH})
+	@if [ -z "$$VERS" ]; then VERS=${GITHUB_REF_NAME}; fi
 	@VERS=$${VERS#v}
 	@VERS=$$(echo $$VERS | sed -e s+'-'+'_'+g)
 	@ARCH=$$(uname -m)
@@ -128,8 +123,14 @@ DEB: scripts/cc-metric-collector.deb.control $(APP)
 	@SIZE_BYTES=$$(du -bcs --exclude=.dpkgbuild "$$WORKSPACE"/ | awk '{print $$1}' | head -1 | sed -e 's/^0\+//')
 	@SIZE="$$(awk -v size="$$SIZE_BYTES" 'BEGIN {print (size/1024)+1}' | awk '{print int($$0)}')"
 	#@sed -e s+"{VERSION}"+"$$VERS"+g -e s+"{INSTALLED_SIZE}"+"$$SIZE"+g -e s+"{ARCH}"+"$$ARCH"+g $$CONTROLFILE > $${DEBIANDIR}/control
+	@echo "Version: $$VERS"
+	@echo "Size: $$SIZE"
+	@echo "Arch: $$ARCH"
 	@sed -e s+"{VERSION}"+"$$VERS"+g -e s+"{INSTALLED_SIZE}"+"$$SIZE"+g -e s+"{ARCH}"+"$$ARCH"+g $$CONTROLFILE > $${DEBIANBINDIR}/control
 	@make PREFIX=$${WORKSPACE} install
 	@DEB_FILE="cc-metric-collector_$${VERS}_$${ARCH}.deb"
 	@dpkg-deb -b $${WORKSPACE} "$$DEB_FILE"
+	@if [ "$${GITHUB_ACTIONS}" = "true" ]; then
+	@     echo "::set-output name=DEB::$${DEB_FILE}"
+	@fi
 	@rm -r "$${WORKSPACE}"

README.md

@@ -1,5 +1,6 @@
 # cc-metric-collector
-A node agent for measuring, processing and forwarding node level metrics. It is part of the ClusterCockpit ecosystem.
+
+A node agent for measuring, processing and forwarding node level metrics. It is part of the [ClusterCockpit ecosystem](./docs/introduction.md).
 
 The metric collector sends (and receives) metric in the [InfluxDB line protocol](https://docs.influxdata.com/influxdb/cloud/reference/syntax/line-protocol/) as it provides flexibility while providing a separation between tags (like index columns in relational databases) and fields (like data columns).
 
@@ -10,7 +11,7 @@ The receiver runs as a go routine side-by-side with the timer loop and asynchron
 # Configuration
 
 Configuration is implemented using a single json document that is distributed over network and may be persisted as file.
-Supported metrics are documented [here](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).
+Supported metrics are documented [here](https://github.com/ClusterCockpit/cc-specifications/blob/master/interfaces/lineprotocol/README.md).
 
 There is a main configuration file with basic settings that point to the other configuration files for the different components.
 
@@ -20,20 +21,20 @@ There is a main configuration file with basic settings that point to the other c
   "collectors" : "collectors.json",
   "receivers" : "receivers.json",
   "router" : "router.json",
-  "interval": 10,
-  "duration": 1
+  "interval": "10s",
+  "duration": "1s"
 }
 ```
 
-The `interval` defines how often the metrics should be read and send to the sink. The `duration` tells collectors how long one measurement has to take. This is important for some collectors, like the `likwid` collector.
+The `interval` defines how often the metrics should be read and send to the sink. The `duration` tells collectors how long one measurement has to take. This is important for some collectors, like the `likwid` collector. For more information, see [here](./docs/configuration.md).
 
 See the component READMEs for their configuration:
+
 * [`collectors`](./collectors/README.md)
 * [`sinks`](./sinks/README.md)
 * [`receivers`](./receivers/README.md)
 * [`router`](./internal/metricRouter/README.md)
 
-
 # Installation
 
 ```
@@ -43,6 +44,7 @@ $ go get (requires at least golang 1.16)
 $ make
 ```
 
+For more information, see [here](./docs/building.md).
 
 # Running
 
@@ -56,6 +58,7 @@ Usage of metric-collector:
   -once
     	Run all collectors only once
 ```
+
 # Scenarios
 
 The metric collector was designed with flexibility in mind, so it can be used in many scenarios. Here are a few:
@@ -93,11 +96,12 @@ flowchart TD
 ```
 
 # Contributing
+
 The ClusterCockpit ecosystem is designed to be used by different HPC computing centers. Since configurations and setups differ between the centers, the centers likely have to put some work into the cc-metric-collector to gather all desired metrics.
 
 You are free to open an issue to request a collector but we would also be happy about PRs.
 
-# Contact 
+# Contact
 
 * [Matrix.org ClusterCockpit General chat](https://matrix.to/#/#clustercockpit-dev:matrix.org)
 * [Matrix.org ClusterCockpit Development chat](https://matrix.to/#/#clustercockpit:matrix.org)

cc-metric-collector.go

@@ -15,10 +15,10 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	mr "github.com/ClusterCockpit/cc-metric-collector/internal/metricRouter"
-	mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
 
 type CentralConfigFile struct {

collectors.json

@@ -12,6 +12,7 @@
             "proc_total"
         ]
     },
+    "memstat": {},
     "netstat": {
         "include_devices": [
             "enp5s0"
@@ -33,5 +34,8 @@
                 "type-id": "1"
             }
         }
+    },
+    "topprocs": {
+        "num_procs": 5
     }
 }

collectors/README.md

@@ -35,7 +35,7 @@ In contrast to the configuration files for sinks and receivers, the collectors c
 * [`nfs4stat`](./nfs4Metric.md)
 * [`cpufreq`](./cpufreqMetric.md)
 * [`cpufreq_cpuinfo`](./cpufreqCpuinfoMetric.md)
-* [`numastat`](./numastatMetric.md)
+* [`numastats`](./numastatsMetric.md)
 * [`gpfs`](./gpfsMetric.md)
 * [`beegfs_meta`](./beegfsmetaMetric.md)
 * [`beegfs_storage`](./beegfsstorageMetric.md)
@@ -51,7 +51,7 @@ A collector reads data from any source, parses it to metrics and submits these m
 * `Name() string`: Return the name of the collector
 * `Init(config json.RawMessage) error`: Initializes the collector using the given collector-specific config in JSON. Check if needed files/commands exists, ...
 * `Initialized() bool`: Check if a collector is successfully initialized
-* `Read(duration time.Duration, output chan ccMetric.CCMetric)`: Read, parse and submit data to the `output` channel as [`CCMetric`](../internal/ccMetric/README.md). If the collector has to measure anything for some duration, use the provided function argument `duration`. 
+* `Read(duration time.Duration, output chan ccMetric.CCMetric)`: Read, parse and submit data to the `output` channel as [`CCMetric`](../internal/ccMetric/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.

collectors/beegfsmetaMetric.go

@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"os/exec"
 	"os/user"
@@ -14,8 +14,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const DEFAULT_BEEGFS_CMD = "beegfs-ctl"
@@ -115,7 +115,7 @@ func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMetr
 		return
 	}
 	//get mounpoint
-	buffer, _ := ioutil.ReadFile(string("/proc/mounts"))
+	buffer, _ := os.ReadFile(string("/proc/mounts"))
 	mounts := strings.Split(string(buffer), "\n")
 	var mountpoints []string
 	for _, line := range mounts {
@@ -157,9 +157,9 @@ func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMetr
 		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, _ := ioutil.ReadAll(cmdStderr)
+			data, _ := io.ReadAll(cmdStderr)
 			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stderr: \"%s\"\n", string(data))
-			data, _ = ioutil.ReadAll(cmdStdout)
+			data, _ = io.ReadAll(cmdStdout)
 			fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stdout: \"%s\"\n", string(data))
 			return
 		}

collectors/beegfsstorageMetric.go

@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"os/exec"
 	"os/user"
@@ -14,8 +14,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 // Struct for the collector-specific JSON config
@@ -108,7 +108,7 @@ func (m *BeegfsStorageCollector) Read(interval time.Duration, output chan lp.CCM
 		return
 	}
 	//get mounpoint
-	buffer, _ := ioutil.ReadFile(string("/proc/mounts"))
+	buffer, _ := os.ReadFile(string("/proc/mounts"))
 	mounts := strings.Split(string(buffer), "\n")
 	var mountpoints []string
 	for _, line := range mounts {
@@ -149,9 +149,9 @@ func (m *BeegfsStorageCollector) Read(interval time.Duration, output chan lp.CCM
 		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, _ := ioutil.ReadAll(cmdStderr)
+			data, _ := io.ReadAll(cmdStderr)
 			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stderr: \"%s\"\n", string(data))
-			data, _ = ioutil.ReadAll(cmdStdout)
+			data, _ = io.ReadAll(cmdStdout)
 			fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stdout: \"%s\"\n", string(data))
 			return
 		}

collectors/collectorManager.go

@@ -6,9 +6,9 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
-	mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
 
 // Map of all available metric collectors
@@ -36,7 +36,10 @@ var AvailableCollectors = map[string]MetricCollector{
 	"numastats":       new(NUMAStatsCollector),
 	"beegfs_meta":     new(BeegfsMetaCollector),
 	"beegfs_storage":  new(BeegfsStorageCollector),
+	"rapl":            new(RAPLCollector),
 	"rocm_smi":        new(RocmSmiCollector),
+	"self":            new(SelfCollector),
+	"schedstat":       new(SchedstatCollector),
 }
 
 // Metric collector manager data structure

collectors/cpufreqCpuinfoMetric.go

@@ -10,8 +10,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 //
@@ -142,6 +142,11 @@ 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)
+        }
+
 	numPhysicalPackageID_int := maxPhysicalPackageID + 1
 	numPhysicalPackageID := fmt.Sprint(numPhysicalPackageID_int)
 	numNonHT := fmt.Sprint(numNonHT_int)

collectors/cpufreqMetric.go

@@ -3,14 +3,14 @@ package collectors
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"golang.org/x/sys/unix"
 )
 
@@ -23,20 +23,18 @@ type CPUFreqCollectorTopology struct {
 	numPhysicalPackages     string // number of  sockets / packages
 	numPhysicalPackages_int int64
 	isHT                    bool
-	numNonHT                string // number of non hyperthreading processors
+	numNonHT                string // number of non hyper-threading processors
 	numNonHT_int            int64
 	scalingCurFreqFile      string
 	tagSet                  map[string]string
 }
 
-//
 // CPUFreqCollector
 // a metric collector to measure the current frequency of the CPUs
 // as obtained from the hardware (in KHz)
-// Only measure on the first hyper thread
+// Only measure on the first hyper-thread
 //
 // See: https://www.kernel.org/doc/html/latest/admin-guide/pm/cpufreq.html
-//
 type CPUFreqCollector struct {
 	metricCollector
 	topology []CPUFreqCollectorTopology
@@ -63,7 +61,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 	m.meta = map[string]string{
 		"source": m.name,
 		"group":  "CPU",
-		"unit":   "MHz",
+		"unit":   "Hz",
 	}
 
 	// Loop for all CPU directories
@@ -88,7 +86,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 
 		// Read package ID
 		physicalPackageIDFile := filepath.Join(cpuDir, "topology", "physical_package_id")
-		line, err := ioutil.ReadFile(physicalPackageIDFile)
+		line, err := os.ReadFile(physicalPackageIDFile)
 		if err != nil {
 			return fmt.Errorf("unable to read physical package ID from file '%s': %v", physicalPackageIDFile, err)
 		}
@@ -100,7 +98,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 
 		// Read core ID
 		coreIDFile := filepath.Join(cpuDir, "topology", "core_id")
-		line, err = ioutil.ReadFile(coreIDFile)
+		line, err = os.ReadFile(coreIDFile)
 		if err != nil {
 			return fmt.Errorf("unable to read core ID from file '%s': %v", coreIDFile, err)
 		}
@@ -126,7 +124,7 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		t.scalingCurFreqFile = scalingCurFreqFile
 	}
 
-	// is processor a hyperthread?
+	// is processor a hyper-thread?
 	coreSeenBefore := make(map[string]bool)
 	for i := range m.topology {
 		t := &m.topology[i]
@@ -136,23 +134,20 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		coreSeenBefore[globalID] = true
 	}
 
-	// number of non hyper thread cores and packages / sockets
+	// number of non hyper-thread cores and packages / sockets
 	var numNonHT_int int64 = 0
-	var maxPhysicalPackageID int64 = 0
+	PhysicalPackageIDs := make(map[int64]struct{})
 	for i := range m.topology {
 		t := &m.topology[i]
 
-		// Update maxPackageID
-		if t.physicalPackageID_int > maxPhysicalPackageID {
-			maxPhysicalPackageID = t.physicalPackageID_int
-		}
-
 		if !t.isHT {
 			numNonHT_int++
 		}
+
+		PhysicalPackageIDs[t.physicalPackageID_int] = struct{}{}
 	}
 
-	numPhysicalPackageID_int := maxPhysicalPackageID + 1
+	numPhysicalPackageID_int := int64(len(PhysicalPackageIDs))
 	numPhysicalPackageID := fmt.Sprint(numPhysicalPackageID_int)
 	numNonHT := fmt.Sprint(numNonHT_int)
 	for i := range m.topology {
@@ -168,6 +163,13 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		}
 	}
 
+	// Initialized
+	cclog.ComponentDebug(
+		m.name,
+		"initialized",
+		numPhysicalPackageID_int, "physical packages,",
+		len(cpuDirs), "CPUs,",
+		numNonHT, "non-hyper-threading CPUs")
 	m.init = true
 	return nil
 }
@@ -182,13 +184,13 @@ func (m *CPUFreqCollector) Read(interval time.Duration, output chan lp.CCMetric)
 	for i := range m.topology {
 		t := &m.topology[i]
 
-		// skip hyperthreads
+		// skip hyper-threads
 		if t.isHT {
 			continue
 		}
 
 		// Read current frequency
-		line, err := ioutil.ReadFile(t.scalingCurFreqFile)
+		line, err := os.ReadFile(t.scalingCurFreqFile)
 		if err != nil {
 			cclog.ComponentError(
 				m.name,

collectors/cpufreqMetric.md

@@ -1,4 +1,5 @@
 ## `cpufreq_cpuinfo` collector
+
 ```json
   "cpufreq": {
     "exclude_metrics": []
@@ -8,4 +9,5 @@
 The `cpufreq` collector reads the clock frequency from `/sys/devices/system/cpu/cpu*/cpufreq` and outputs a handful **hwthread** metrics.
 
 Metrics:
-* `cpufreq`
+
+* `cpufreq`

collectors/cpustatMetric.go

@@ -9,8 +9,9 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	sysconf "github.com/tklauser/go-sysconf"
 )
 
 const CPUSTATFILE = `/proc/stat`
@@ -21,10 +22,12 @@ type CpustatCollectorConfig struct {
 
 type CpustatCollector struct {
 	metricCollector
-	config   CpustatCollectorConfig
-	matches  map[string]int
-	cputags  map[string]map[string]string
-	nodetags map[string]string
+	config        CpustatCollectorConfig
+	lastTimestamp time.Time // Store time stamp of last tick to derive values
+	matches       map[string]int
+	cputags       map[string]map[string]string
+	nodetags      map[string]string
+	olddata       map[string]map[string]int64
 }
 
 func (m *CpustatCollector) Init(config json.RawMessage) error {
@@ -76,36 +79,48 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 	// 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)
 	for scanner.Scan() {
 		line := scanner.Text()
 		linefields := strings.Fields(line)
-		if strings.HasPrefix(linefields[0], "cpu") && strings.Compare(linefields[0], "cpu") != 0 {
+		if strings.Compare(linefields[0], "cpu") == 0 {
+			m.olddata["cpu"] = make(map[string]int64)
+			for k, v := range m.matches {
+				m.olddata["cpu"][k], _ = strconv.ParseInt(linefields[v], 0, 64)
+			}
+		} 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.olddata[linefields[0]] = make(map[string]int64)
+			for k, v := range m.matches {
+				m.olddata[linefields[0]][k], _ = strconv.ParseInt(linefields[v], 0, 64)
+			}
 			num_cpus++
 		}
 	}
+	m.lastTimestamp = time.Now()
 	m.init = true
 	return nil
 }
 
-func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]string, output chan lp.CCMetric) {
+func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]string, output chan lp.CCMetric, now time.Time, tsdelta time.Duration) {
 	values := make(map[string]float64)
-	total := 0.0
+	clktck, _ := sysconf.Sysconf(sysconf.SC_CLK_TCK)
 	for match, index := range m.matches {
 		if len(match) > 0 {
 			x, err := strconv.ParseInt(linefields[index], 0, 64)
 			if err == nil {
-				values[match] = float64(x)
-				total += values[match]
+				vdiff := x - m.olddata[linefields[0]][match]
+				m.olddata[linefields[0]][match] = x // Store new value for next run
+				values[match] = float64(vdiff) / float64(tsdelta.Seconds()) / float64(clktck)
 			}
 		}
 	}
-	t := time.Now()
+
 	for name, value := range values {
-		y, err := lp.New(name, tags, m.meta, map[string]interface{}{"value": (value * 100.0) / total}, t)
+		y, err := lp.New(name, tags, m.meta, map[string]interface{}{"value": value * 100}, now)
 		if err == nil {
 			output <- y
 		}
@@ -117,6 +132,9 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMetric)
 		return
 	}
 	num_cpus := 0
+	now := time.Now()
+	tsdelta := now.Sub(m.lastTimestamp)
+
 	file, err := os.Open(string(CPUSTATFILE))
 	if err != nil {
 		cclog.ComponentError(m.name, err.Error())
@@ -128,9 +146,9 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMetric)
 		line := scanner.Text()
 		linefields := strings.Fields(line)
 		if strings.Compare(linefields[0], "cpu") == 0 {
-			m.parseStatLine(linefields, m.nodetags, output)
+			m.parseStatLine(linefields, m.nodetags, output, now, tsdelta)
 		} else if strings.HasPrefix(linefields[0], "cpu") {
-			m.parseStatLine(linefields, m.cputags[linefields[0]], output)
+			m.parseStatLine(linefields, m.cputags[linefields[0]], output, now, tsdelta)
 			num_cpus++
 		}
 	}
@@ -139,11 +157,13 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMetric)
 		m.nodetags,
 		m.meta,
 		map[string]interface{}{"value": int(num_cpus)},
-		time.Now(),
+		now,
 	)
 	if err == nil {
 		output <- num_cpus_metric
 	}
+
+	m.lastTimestamp = now
 }
 
 func (m *CpustatCollector) Close() {

collectors/cpustatMetric.md

@@ -1,5 +1,6 @@
 
 ## `cpustat` collector
+
 ```json
   "cpustat": {
     "exclude_metrics": [
@@ -8,9 +9,10 @@
   }
 ```
 
-The `cpustat` collector reads data from `/proc/stats` and outputs a handful **node** and **hwthread** metrics. If a metric is not required, it can be excluded from forwarding it to the sink.
+The `cpustat` collector reads data from `/proc/stat` and outputs a handful **node** and **hwthread** metrics. If a metric is not required, it can be excluded from forwarding it to the sink.
 
 Metrics:
+
 * `cpu_user`
 * `cpu_nice`
 * `cpu_system`

collectors/customCmdMetric.go

@@ -3,13 +3,13 @@ package collectors
 import (
 	"encoding/json"
 	"errors"
-	"io/ioutil"
 	"log"
+	"os"
 	"os/exec"
 	"strings"
 	"time"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influx "github.com/influxdata/line-protocol"
 )
 
@@ -53,7 +53,7 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 		}
 	}
 	for _, f := range m.config.Files {
-		_, err = ioutil.ReadFile(f)
+		_, err = os.ReadFile(f)
 		if err == nil {
 			m.files = append(m.files, f)
 		} else {
@@ -106,7 +106,7 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMetri
 		}
 	}
 	for _, file := range m.files {
-		buffer, err := ioutil.ReadFile(file)
+		buffer, err := os.ReadFile(file)
 		if err != nil {
 			log.Print(err)
 			return

collectors/diskstatMetric.go

@@ -8,8 +8,8 @@ import (
 	"syscall"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 //	"log"

collectors/gpfsMetric.go

@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os/exec"
 	"os/user"
@@ -13,8 +13,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const DEFAULT_GPFS_CMD = "mmpmon"
@@ -118,8 +118,8 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 	cmd.Stderr = cmdStderr
 	err := cmd.Run()
 	if err != nil {
-		dataStdErr, _ := ioutil.ReadAll(cmdStderr)
-		dataStdOut, _ := ioutil.ReadAll(cmdStdout)
+		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),

collectors/infinibandMetric.go

@@ -2,11 +2,10 @@ package collectors
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"golang.org/x/sys/unix"
 
 	"encoding/json"
@@ -19,8 +18,9 @@ import (
 const IB_BASEPATH = "/sys/class/infiniband/"
 
 type InfinibandCollectorMetric struct {
-	path string
-	unit string
+	path  string
+	unit  string
+	scale int64
 }
 
 type InfinibandCollectorInfo struct {
@@ -84,7 +84,7 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 	for _, path := range ibDirs {
 
 		// Skip, when no LID is assigned
-		line, err := ioutil.ReadFile(filepath.Join(path, "lid"))
+		line, err := os.ReadFile(filepath.Join(path, "lid"))
 		if err != nil {
 			continue
 		}
@@ -113,10 +113,10 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 		// Check access to counter files
 		countersDir := filepath.Join(path, "counters")
 		portCounterFiles := map[string]InfinibandCollectorMetric{
-			"ib_recv":      {path: filepath.Join(countersDir, "port_rcv_data"), unit: "bytes"},
-			"ib_xmit":      {path: filepath.Join(countersDir, "port_xmit_data"), unit: "bytes"},
-			"ib_recv_pkts": {path: filepath.Join(countersDir, "port_rcv_packets"), unit: "packets"},
-			"ib_xmit_pkts": {path: filepath.Join(countersDir, "port_xmit_packets"), unit: "packets"},
+			"ib_recv":      {path: filepath.Join(countersDir, "port_rcv_data"), unit: "bytes", scale: 4},
+			"ib_xmit":      {path: filepath.Join(countersDir, "port_xmit_data"), unit: "bytes", scale: 4},
+			"ib_recv_pkts": {path: filepath.Join(countersDir, "port_rcv_packets"), unit: "packets", scale: 1},
+			"ib_xmit_pkts": {path: filepath.Join(countersDir, "port_xmit_packets"), unit: "packets", scale: 1},
 		}
 		for _, counter := range portCounterFiles {
 			err := unix.Access(counter.path, unix.R_OK)
@@ -174,7 +174,7 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 		for counterName, counterDef := range info.portCounterFiles {
 
 			// Read counter file
-			line, err := ioutil.ReadFile(counterDef.path)
+			line, err := os.ReadFile(counterDef.path)
 			if err != nil {
 				cclog.ComponentError(
 					m.name,
@@ -191,6 +191,8 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 					fmt.Sprintf("Read(): Failed to convert Infininiband metrice %s='%s' to int64: %v", counterName, data, err))
 				continue
 			}
+			// Scale raw value
+			v *= counterDef.scale
 
 			// Send absolut values
 			if m.config.SendAbsoluteValues {

collectors/iostatMetric.go

@@ -4,8 +4,8 @@ import (
 	"bufio"
 	"os"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 
 	//	"log"
 	"encoding/json"

collectors/ipmiMetric.go

@@ -1,51 +1,57 @@
 package collectors
 
 import (
+	"bufio"
+	"bytes"
 	"encoding/json"
 	"errors"
+	"fmt"
+	"io"
 	"log"
-	"os"
 	"os/exec"
 	"strconv"
 	"strings"
 	"time"
-
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
-const IPMITOOL_PATH = `ipmitool`
 const IPMISENSORS_PATH = `ipmi-sensors`
 
-type IpmiCollectorConfig struct {
-	ExcludeDevices  []string `json:"exclude_devices"`
-	IpmitoolPath    string   `json:"ipmitool_path"`
-	IpmisensorsPath string   `json:"ipmisensors_path"`
-}
-
 type IpmiCollector struct {
 	metricCollector
-	//tags        map[string]string
-	//matches     map[string]string
-	config      IpmiCollectorConfig
+	config struct {
+		ExcludeDevices  []string `json:"exclude_devices"`
+		IpmitoolPath    string   `json:"ipmitool_path"`
+		IpmisensorsPath string   `json:"ipmisensors_path"`
+	}
 	ipmitool    string
 	ipmisensors string
 }
 
 func (m *IpmiCollector) Init(config json.RawMessage) error {
+	// Check if already initialized
+	if m.init {
+		return nil
+	}
+
 	m.name = "IpmiCollector"
 	m.setup()
 	m.parallel = true
-	m.meta = map[string]string{"source": m.name, "group": "IPMI"}
-	m.config.IpmitoolPath = string(IPMITOOL_PATH)
-	m.config.IpmisensorsPath = string(IPMISENSORS_PATH)
-	m.ipmitool = ""
-	m.ipmisensors = ""
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "IPMI",
+	}
+	// default path to IPMI tools
+	m.config.IpmitoolPath = "ipmitool"
+	m.config.IpmisensorsPath = "ipmi-sensors"
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
 			return err
 		}
 	}
+	// Check if executables ipmitool or ipmisensors are found
 	p, err := exec.LookPath(m.config.IpmitoolPath)
 	if err == nil {
 		m.ipmitool = p
@@ -62,25 +68,33 @@ func (m *IpmiCollector) Init(config json.RawMessage) error {
 }
 
 func (m *IpmiCollector) readIpmiTool(cmd string, output chan lp.CCMetric) {
+
+	// Setup ipmitool command
 	command := exec.Command(cmd, "sensor")
-	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("readIpmiTool(): 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 {
 			continue
 		}
-		v, err := strconv.ParseFloat(strings.Trim(lv[1], " "), 64)
+		v, err := strconv.ParseFloat(strings.TrimSpace(lv[1]), 64)
 		if err == nil {
-			name := strings.ToLower(strings.Replace(strings.Trim(lv[0], " "), " ", "_", -1))
-			unit := strings.Trim(lv[2], " ")
+			name := strings.ToLower(strings.Replace(strings.TrimSpace(lv[0]), " ", "_", -1))
+			unit := strings.TrimSpace(lv[2])
 			if unit == "Volts" {
 				unit = "Volts"
 			} else if unit == "degrees C" {
@@ -98,6 +112,17 @@ func (m *IpmiCollector) readIpmiTool(cmd string, output chan lp.CCMetric) {
 			}
 		}
 	}
+
+	// Wait for command end
+	if err := command.Wait(); err != nil {
+		errMsg, _ := io.ReadAll(errBuf)
+		cclog.ComponentError(
+			m.name,
+			fmt.Sprintf("readIpmiTool(): Failed to wait for the end of command \"%s\": %v\n", command.String(), err),
+			fmt.Sprintf("readIpmiTool(): command stderr: \"%s\"\n", string(errMsg)),
+		)
+		return
+	}
 }
 
 func (m *IpmiCollector) readIpmiSensors(cmd string, output chan lp.CCMetric) {
@@ -131,16 +156,16 @@ func (m *IpmiCollector) readIpmiSensors(cmd string, output chan lp.CCMetric) {
 }
 
 func (m *IpmiCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+
+	// Check if already initialized
+	if !m.init {
+		return
+	}
+
 	if len(m.config.IpmitoolPath) > 0 {
-		_, err := os.Stat(m.config.IpmitoolPath)
-		if err == nil {
-			m.readIpmiTool(m.config.IpmitoolPath, output)
-		}
+		m.readIpmiTool(m.config.IpmitoolPath, output)
 	} else if len(m.config.IpmisensorsPath) > 0 {
-		_, err := os.Stat(m.config.IpmisensorsPath)
-		if err == nil {
-			m.readIpmiSensors(m.config.IpmisensorsPath, output)
-		}
+		m.readIpmiSensors(m.config.IpmisensorsPath, output)
 	}
 }
 

collectors/ipmiMetric.md

@@ -8,9 +8,6 @@
   }
 ```
 
-The `ipmistat` collector reads data from `ipmitool` (`ipmitool sensor`) or `ipmi-sensors` (`ipmi-sensors --sdr-cache-recreate --comma-separated-output`). 
+The `ipmistat` collector reads data from `ipmitool` (`ipmitool sensor`) or `ipmi-sensors` (`ipmi-sensors --sdr-cache-recreate --comma-separated-output`).
 
 The metrics depend on the output of the underlying tools but contain temperature, power and energy metrics.
-
-
-

collectors/likwidMetric.go

@@ -12,7 +12,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"math"
 	"os"
 	"os/signal"
@@ -24,11 +23,12 @@ import (
 	"time"
 	"unsafe"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
-	topo "github.com/ClusterCockpit/cc-metric-collector/internal/ccTopology"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"github.com/NVIDIA/go-nvml/pkg/dl"
+	"golang.design/x/thread"
 )
 
 const (
@@ -72,18 +72,20 @@ type LikwidCollectorConfig struct {
 
 type LikwidCollector struct {
 	metricCollector
-	cpulist      []C.int
-	cpu2tid      map[int]int
-	sock2tid     map[int]int
-	metrics      map[C.int]map[string]int
-	groups       []C.int
-	config       LikwidCollectorConfig
-	gmresults    map[int]map[string]float64
-	basefreq     float64
-	running      bool
-	initialized  bool
-	likwidGroups map[C.int]LikwidEventsetConfig
-	lock         sync.Mutex
+	cpulist       []C.int
+	cpu2tid       map[int]int
+	sock2tid      map[int]int
+	metrics       map[C.int]map[string]int
+	groups        []C.int
+	config        LikwidCollectorConfig
+	gmresults     map[int]map[string]float64
+	basefreq      float64
+	running       bool
+	initialized   bool
+	needs_reinit bool
+	likwidGroups  map[C.int]LikwidEventsetConfig
+	lock          sync.Mutex
+	measureThread thread.Thread
 }
 
 type LikwidMetric struct {
@@ -93,6 +95,18 @@ type LikwidMetric struct {
 	group_idx int
 }
 
+func checkMetricType(t string) bool {
+	valid := map[string]bool{
+		"node":         true,
+		"socket":       true,
+		"hwthread":     true,
+		"core":         true,
+		"memoryDomain": true,
+	}
+	_, ok := valid[t]
+	return ok
+}
+
 func eventsToEventStr(events map[string]string) string {
 	elist := make([]string, 0)
 	for k, v := range events {
@@ -154,12 +168,13 @@ func getBaseFreq() float64 {
 	}
 	var freq float64 = math.NaN()
 	for _, f := range files {
-		buffer, err := ioutil.ReadFile(f)
+		buffer, err := os.ReadFile(f)
 		if err == nil {
 			data := strings.Replace(string(buffer), "\n", "", -1)
 			x, err := strconv.ParseInt(data, 0, 64)
 			if err == nil {
-				freq = float64(x) * 1e6
+				freq = float64(x)
+				break
 			}
 		}
 	}
@@ -168,17 +183,18 @@ func getBaseFreq() float64 {
 		C.power_init(0)
 		info := C.get_powerInfo()
 		if float64(info.baseFrequency) != 0 {
-			freq = float64(info.baseFrequency) * 1e6
+			freq = float64(info.baseFrequency)
 		}
 		C.power_finalize()
 	}
-	return freq
+	return freq * 1e3
 }
 
 func (m *LikwidCollector) Init(config json.RawMessage) error {
 	m.name = "LikwidCollector"
 	m.parallel = false
 	m.initialized = false
+	m.needs_reinit = true
 	m.running = false
 	m.config.AccessMode = LIKWID_DEF_ACCESSMODE
 	m.config.LibraryPath = LIKWID_LIB_NAME
@@ -239,7 +255,7 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 			}
 			for _, metric := range evset.Metrics {
 				// Try to evaluate the metric
-				if testLikwidMetricFormula(metric.Calc, params) {
+				if testLikwidMetricFormula(metric.Calc, params) && checkMetricType(metric.Type) {
 					// Add the computable metric to the parameter list for the global metrics
 					globalParams = append(globalParams, metric.Name)
 					totalMetrics++
@@ -257,6 +273,9 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 		if !testLikwidMetricFormula(metric.Calc, globalParams) {
 			cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed")
 			metric.Calc = ""
+		} else if !checkMetricType(metric.Type) {
+			cclog.ComponentError(m.name, "Metric", metric.Name, "has invalid type")
+			metric.Calc = ""
 		} else {
 			totalMetrics++
 		}
@@ -268,6 +287,7 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 		cclog.ComponentError(m.name, err.Error())
 		return err
 	}
+	m.measureThread = thread.New()
 	m.init = true
 	return nil
 }
@@ -281,6 +301,7 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 		if ret != 0 {
 			var err error = nil
 			var skip bool = false
+			cclog.ComponentDebug(m.name, "Setup returns", ret)
 			if ret == -37 {
 				skip = true
 			} else {
@@ -289,6 +310,7 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 			m.lock.Unlock()
 			return skip, err
 		}
+		m.running = true
 		ret = C.perfmon_startCounters()
 		if ret != 0 {
 			var err error = nil
@@ -301,7 +323,7 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 			m.lock.Unlock()
 			return skip, err
 		}
-		m.running = true
+		ret = C.perfmon_readCounters()
 		time.Sleep(interval)
 		m.running = false
 		ret = C.perfmon_stopCounters()
@@ -316,6 +338,24 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 			m.lock.Unlock()
 			return skip, err
 		}
+		m.running = false
+		runtime := float64(C.perfmon_getLastTimeOfGroup(evset.gid))
+		// Go over events and get the results
+		for eidx, counter := range evset.eorder {
+			gctr := C.GoString(counter)
+			for _, tid := range m.cpu2tid {
+				res := C.perfmon_getLastResult(evset.gid, C.int(eidx), C.int(tid))
+				fres := float64(res)
+				if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
+					cclog.ComponentDebug(m.name, "Sanitize", gctr, "to zero")
+					fres = 0.0
+				}
+				evset.results[tid][gctr] = fres
+			}
+		}
+		for _, tid := range m.cpu2tid {
+			evset.results[tid]["time"] = runtime
+		}
 	}
 	m.lock.Unlock()
 	return false, nil
@@ -325,19 +365,8 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interval time.Duration, output chan lp.CCMetric) error {
 	invClock := float64(1.0 / m.basefreq)
 
-	// Go over events and get the results
-	for eidx, counter := range evset.eorder {
-		gctr := C.GoString(counter)
-		for _, tid := range m.cpu2tid {
-			res := C.perfmon_getLastResult(evset.gid, C.int(eidx), C.int(tid))
-			fres := float64(res)
-			if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
-				fres = 0.0
-			}
-			evset.results[tid][gctr] = fres
-			evset.results[tid]["time"] = interval.Seconds()
-			evset.results[tid]["inverseClock"] = invClock
-		}
+	for _, tid := range m.cpu2tid {
+		evset.results[tid]["inverseClock"] = invClock
 	}
 
 	// Go over the event set metrics, derive the value out of the event:counter values and send it
@@ -431,6 +460,28 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan
 	return nil
 }
 
+func (m *LikwidCollector) ReInit() error {
+	C.perfmon_finalize()
+	ret := C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
+	if ret != 0 {
+		return nil
+	}
+	for i, evset := range m.config.Eventsets {
+		var gid C.int
+		if len(evset.Events) > 0 {
+			//skip := false
+			likwidGroup := genLikwidEventSet(evset)
+			gid = C.perfmon_addEventSet(likwidGroup.estr)
+			if gid >= 0 {
+				likwidGroup.gid = gid
+				likwidGroup.internal = i
+				m.likwidGroups[gid] = likwidGroup
+			}
+		}
+	}
+	return nil
+}
+
 func (m *LikwidCollector) LateInit() error {
 	var ret C.int
 	if m.initialized {
@@ -445,6 +496,9 @@ func (m *LikwidCollector) LateInit() error {
 			os.Setenv("PATH", m.config.DaemonPath+":"+p)
 		}
 		C.HPMmode(1)
+		for _, c := range m.cpulist {
+			C.HPMaddThread(c)
+		}
 	}
 	cclog.ComponentDebug(m.name, "initialize LIKWID topology")
 	ret = C.topology_init()
@@ -468,48 +522,53 @@ func (m *LikwidCollector) LateInit() error {
 	m.basefreq = getBaseFreq()
 	cclog.ComponentDebug(m.name, "BaseFreq", m.basefreq)
 
-	cclog.ComponentDebug(m.name, "initialize LIKWID perfmon module")
-	ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
-	if ret != 0 {
-		var err error = nil
-		C.topology_finalize()
-		if ret != -22 {
-			err = errors.New("failed to initialize LIKWID perfmon")
-			cclog.ComponentError(m.name, err.Error())
-		} else {
-			err = errors.New("access to LIKWID perfmon locked")
-		}
-		return err
+	if m.needs_reinit {
+		m.ReInit()
+		m.needs_reinit = false
 	}
 
-	// While adding the events, we test the metrics whether they can be computed at all
-	for i, evset := range m.config.Eventsets {
-		var gid C.int
-		if len(evset.Events) > 0 {
-			skip := false
-			likwidGroup := genLikwidEventSet(evset)
-			for _, g := range m.likwidGroups {
-				if likwidGroup.go_estr == g.go_estr {
-					skip = true
-					break
-				}
-			}
-			if skip {
-				continue
-			}
-			// Now we add the list of events to likwid
-			gid = C.perfmon_addEventSet(likwidGroup.estr)
-			if gid >= 0 {
-				likwidGroup.gid = gid
-				likwidGroup.internal = i
-				m.likwidGroups[gid] = likwidGroup
-			}
-		} else {
-			cclog.ComponentError(m.name, "Invalid Likwid eventset config, no events given")
-			continue
-		}
+	// cclog.ComponentDebug(m.name, "initialize LIKWID perfmon module")
+	// ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
+	// if ret != 0 {
+	// 	var err error = nil
+	// 	C.topology_finalize()
+	// 	if ret != -22 {
+	// 		err = errors.New("failed to initialize LIKWID perfmon")
+	// 		cclog.ComponentError(m.name, err.Error())
+	// 	} else {
+	// 		err = errors.New("access to LIKWID perfmon locked")
+	// 	}
+	// 	return err
+	// }
 
-	}
+	// // While adding the events, we test the metrics whether they can be computed at all
+	// for i, evset := range m.config.Eventsets {
+	// 	var gid C.int
+	// 	if len(evset.Events) > 0 {
+	// 		//skip := false
+	// 		likwidGroup := genLikwidEventSet(evset)
+	// 		// for _, g := range m.likwidGroups {
+	// 		// 	if likwidGroup.go_estr == g.go_estr {
+	// 		// 		skip = true
+	// 		// 		break
+	// 		// 	}
+	// 		// }
+	// 		// if skip {
+	// 		// 	continue
+	// 		// }
+	// 		// Now we add the list of events to likwid
+	// 		gid = C.perfmon_addEventSet(likwidGroup.estr)
+	// 		if gid >= 0 {
+	// 			likwidGroup.gid = gid
+	// 			likwidGroup.internal = i
+	// 			m.likwidGroups[gid] = likwidGroup
+	// 		}
+	// 	} else {
+	// 		cclog.ComponentError(m.name, "Invalid Likwid eventset config, no events given")
+	// 		continue
+	// 	}
+
+	// }
 
 	// If no event set could be added, shut down LikwidCollector
 	if len(m.likwidGroups) == 0 {
@@ -540,38 +599,48 @@ func (m *LikwidCollector) Read(interval time.Duration, output chan lp.CCMetric)
 		return
 	}
 
-	if !m.initialized {
-		m.lock.Lock()
-		err = m.LateInit()
-		if err != nil {
+	m.measureThread.Call(func() {
+		if !m.initialized {
+			m.lock.Lock()
+			err = m.LateInit()
+			if err != nil {
+				m.lock.Unlock()
+				cclog.ComponentError(m.name, "lateinit failed")
+				return
+			}
+			m.initialized = true
 			m.lock.Unlock()
-			return
+			skip = true
 		}
-		m.initialized = true
-		m.lock.Unlock()
-	}
 
-	if m.initialized && !skip {
-		for _, evset := range m.likwidGroups {
-			if !skip {
-				// measure event set 'i' for 'interval' seconds
-				skip, err = m.takeMeasurement(evset, interval)
-				if err != nil {
-					cclog.ComponentError(m.name, err.Error())
-					return
+		if m.initialized && !skip {
+			time := interval
+			for _, evset := range m.likwidGroups {
+				if !skip {
+					// measure event set 'i' for 'interval' seconds
+					skip, err = m.takeMeasurement(evset, interval)
+					if err != nil {
+						cclog.ComponentError(m.name, err.Error())
+						return
+					}
+				}
+
+				if !skip {
+					// read measurements and derive event set metrics
+					m.calcEventsetMetrics(evset, time, output)
 				}
 			}
 
 			if !skip {
-				// read measurements and derive event set metrics
-				m.calcEventsetMetrics(evset, interval, output)
+				// use the event set metrics to derive the global metrics
+				m.calcGlobalMetrics(time, output)
+			}
+			if skip {
+				m.needs_reinit = true
+				m.initialized = false
 			}
 		}
-		if !skip {
-			// use the event set metrics to derive the global metrics
-			m.calcGlobalMetrics(interval, output)
-		}
-	}
+	})
 }
 
 func (m *LikwidCollector) Close() {

collectors/likwidMetric.md

@@ -7,6 +7,9 @@ The `likwid` collector is probably the most complicated collector. The LIKWID li
   "likwid": {
     "force_overwrite" : false,
     "invalid_to_zero" : false,
+    "liblikwid_path" : "/path/to/liblikwid.so",
+    "accessdaemon_path" : "/folder/that/contains/likwid-accessD",
+    "access_mode" : "direct or accessdaemon or perf_event",
     "eventsets": [
       {
         "events" : {
@@ -38,7 +41,7 @@ The `likwid` collector is probably the most complicated collector. The LIKWID li
 
 The `likwid` configuration consists of two parts, the `eventsets` and `globalmetrics`:
 - An event set list itself has two parts, the `events` and a set of derivable `metrics`. Each of the `events` is a `counter:event` pair in LIKWID's syntax. The `metrics` are a list of formulas to derive the metric value from the measurements of the `events`' values. Each metric has a name, the formula, a type and a publish flag. There is an optional `unit` field. Counter names can be used like variables in the formulas, so `PMC0+PMC1` sums the measurements for the both events configured in the counters `PMC0` and `PMC1`. You can optionally use `time` for the measurement time and `inverseClock` for `1.0/baseCpuFrequency`. The type tells the LikwidCollector whether it is a metric for each hardware thread (`cpu`) or each CPU socket (`socket`). You may specify a unit for the metric with `unit`. The last one is the publishing flag. It tells the LikwidCollector whether a metric should be sent to the router or is only used internally to compute a global metric.
-- The `globalmetrics` are metrics which require data from multiple event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a scope and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. Also `time` and `inverseClock` cannot be used anymore. So, the idea is to derive a metric in the `eventsets` section and reuse it in the `globalmetrics` part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`"publish": false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.
+- The `globalmetrics` are metrics which require data from multiple event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a type and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. Also `time` and `inverseClock` cannot be used anymore. So, the idea is to derive a metric in the `eventsets` section and reuse it in the `globalmetrics` part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`"publish": false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.
 
 Additional options:
 - `force_overwrite`: Same as setting `LIKWID_FORCE=1`. In case counters are already in-use, LIKWID overwrites their configuration to do its measurements
@@ -47,20 +50,20 @@ Additional options:
 - `accessdaemon_path`: Folder of the accessDaemon `likwid-accessD` (like `/usr/local/sbin`)
 - `liblikwid_path`: Location of `liblikwid.so` including file name like `/usr/local/lib/liblikwid.so`
 
-### Available metric scopes
+### Available metric types
 
 Hardware performance counters are scattered all over the system nowadays. A counter coveres a specific part of the system. While there are hardware thread specific counter for CPU cycles, instructions and so on, some others are specific for a whole CPU socket/package. To address that, the LikwidCollector provides the specification of a `type` for each metric.
 
 - `hwthread` : One metric per CPU hardware thread with the tags `"type" : "hwthread"` and `"type-id" : "$hwthread_id"`
 - `socket` : One metric per CPU socket/package with the tags `"type" : "socket"` and `"type-id" : "$socket_id"`
 
-**Note:** You cannot specify `socket` scope for a metric that is measured at `hwthread` scope, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the scope of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.
+**Note:** You cannot specify `socket` type for a metric that is measured at `hwthread` type, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the type of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.
 
 As a guideline:
-- All counters `FIXCx`, `PMCy` and `TMAz` have the scope `hwthread`
-- All counters names containing `BOX` have the scope `socket`
-- All `PWRx` counters have scope `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `hwthread` scope
-- All `DFCx` counters have scope `socket`
+- All counters `FIXCx`, `PMCy` and `TMAz` have the type `hwthread`
+- All counters names containing `BOX` have the type `socket`
+- All `PWRx` counters have type `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `hwthread` type
+- All `DFCx` counters have type `socket`
 
 ### Help with the configuration
 
@@ -90,7 +93,7 @@ $ scripts/likwid_perfgroup_to_cc_config.py ICX MEM_DP
       "name": "Runtime (RDTSC) [s]",
       "publish": true,
       "unit": "seconds"
-      "scope": "hwthread"
+      "type": "hwthread"
     },
     {
       "..." : "..."
@@ -242,7 +245,7 @@ METRICS                          ->   "metrics": [
 IPC   PMC0/PMC1                  ->     {
                                  ->       "name" : "IPC",
                                  ->       "calc" : "PMC0/PMC1",
-                                 ->       "scope": "hwthread",
+                                 ->       "type": "hwthread",
                                  ->       "publish": true
                                  ->     }
                                  ->   ]

collectors/loadavgMetric.go

@@ -3,13 +3,13 @@ package collectors
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 //
@@ -72,7 +72,7 @@ func (m *LoadavgCollector) Read(interval time.Duration, output chan lp.CCMetric)
 	if !m.init {
 		return
 	}
-	buffer, err := ioutil.ReadFile(LOADAVGFILE)
+	buffer, err := os.ReadFile(LOADAVGFILE)
 	if err != nil {
 		if err != nil {
 			cclog.ComponentError(

collectors/lustreMetric.go

@@ -10,8 +10,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const LUSTRE_SYSFS = `/sys/fs/lustre`

collectors/memstatMetric.go

@@ -12,8 +12,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const MEMSTATFILE = "/proc/meminfo"
@@ -68,7 +68,8 @@ func getStats(filename string) map[string]MemstatStats {
 		} else if len(linefields) == 5 {
 			v, err := strconv.ParseFloat(linefields[3], 64)
 			if err == nil {
-				stats[strings.Trim(linefields[0], ":")] = MemstatStats{
+				cclog.ComponentDebug("getStats", strings.Trim(linefields[2], ":"), v, linefields[4])
+				stats[strings.Trim(linefields[2], ":")] = MemstatStats{
 					value: v,
 					unit:  linefields[4],
 				}
@@ -160,7 +161,6 @@ func (m *MemstatCollector) Init(config json.RawMessage) error {
 
 func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 	if !m.init {
-		cclog.ComponentPrint(m.name, "Here")
 		return
 	}
 
@@ -188,16 +188,20 @@ func (m *MemstatCollector) Read(interval time.Duration, output chan lp.CCMetric)
 			unit := ""
 			if totalVal, total := stats["MemTotal"]; total {
 				if freeVal, free := stats["MemFree"]; free {
+					memUsed = totalVal.value - freeVal.value
+					if len(totalVal.unit) > 0 {
+						unit = totalVal.unit
+					} else if len(freeVal.unit) > 0 {
+						unit = freeVal.unit
+					}
 					if bufVal, buffers := stats["Buffers"]; buffers {
+						memUsed -= bufVal.value
+						if len(bufVal.unit) > 0 && len(unit) == 0 {
+							unit = bufVal.unit
+						}
 						if cacheVal, cached := stats["Cached"]; cached {
-							memUsed = totalVal.value - (freeVal.value + bufVal.value + cacheVal.value)
-							if len(totalVal.unit) > 0 {
-								unit = totalVal.unit
-							} else if len(freeVal.unit) > 0 {
-								unit = freeVal.unit
-							} else if len(bufVal.unit) > 0 {
-								unit = bufVal.unit
-							} else if len(cacheVal.unit) > 0 {
+							memUsed -= cacheVal.value
+							if len(cacheVal.unit) > 0 && len(unit) == 0 {
 								unit = cacheVal.unit
 							}
 						}

collectors/metricCollector.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"time"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type MetricCollector interface {

collectors/netstatMetric.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const NETSTATFILE = "/proc/net/dev"

collectors/nfsMetric.go

@@ -11,7 +11,7 @@ import (
 	"strings"
 	"time"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 // First part contains the code for the general NfsCollector.

collectors/nfsiostatMetric.go

@@ -0,0 +1,166 @@
+package collectors
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+)
+
+// These are the fields we read from the JSON configuration
+type NfsIOStatCollectorConfig struct {
+	ExcludeMetrics          []string `json:"exclude_metrics,omitempty"`
+	ExcludeFilesystem       []string `json:"exclude_filesystem,omitempty"`
+	UseServerAddressAsSType bool     `json:"use_server_as_stype,omitempty"`
+}
+
+// This contains all variables we need during execution and the variables
+// defined by metricCollector (name, init, ...)
+type NfsIOStatCollector struct {
+	metricCollector
+	config NfsIOStatCollectorConfig    // the configuration structure
+	meta   map[string]string           // default meta information
+	tags   map[string]string           // default tags
+	data   map[string]map[string]int64 // data storage for difference calculation
+	key    string                      // which device info should be used as subtype ID? 'server' or 'mntpoint', see NfsIOStatCollectorConfig.UseServerAddressAsSType
+}
+
+var deviceRegex = regexp.MustCompile(`device (?P<server>[^ ]+) mounted on (?P<mntpoint>[^ ]+) with fstype nfs(?P<version>\d*) statvers=[\d\.]+`)
+var bytesRegex = regexp.MustCompile(`\s+bytes:\s+(?P<nread>[^ ]+) (?P<nwrite>[^ ]+) (?P<dread>[^ ]+) (?P<dwrite>[^ ]+) (?P<nfsread>[^ ]+) (?P<nfswrite>[^ ]+) (?P<pageread>[^ ]+) (?P<pagewrite>[^ ]+)`)
+
+func resolve_regex_fields(s string, regex *regexp.Regexp) map[string]string {
+	fields := make(map[string]string)
+	groups := regex.SubexpNames()
+	for _, match := range regex.FindAllStringSubmatch(s, -1) {
+		for groupIdx, group := range match {
+			if len(groups[groupIdx]) > 0 {
+				fields[groups[groupIdx]] = group
+			}
+		}
+	}
+	return fields
+}
+
+func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
+	data := make(map[string]map[string]int64)
+	filename := "/proc/self/mountstats"
+	stats, err := os.ReadFile(filename)
+	if err != nil {
+		return data
+	}
+
+	lines := strings.Split(string(stats), "\n")
+	var current map[string]string = nil
+	for _, l := range lines {
+		// 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 {
+				current = dev
+				if len(current["version"]) == 0 {
+					current["version"] = "3"
+				}
+			}
+		}
+
+		if len(current) > 0 {
+			// Byte line parsing (if found the device for it)
+			bytes := resolve_regex_fields(l, bytesRegex)
+			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 {
+						val, err := strconv.ParseInt(sval, 10, 64)
+						if err == nil {
+							data[current[m.key]][name] = val
+						}
+					}
+
+				}
+				current = nil
+			}
+		}
+	}
+	return data
+}
+
+func (m *NfsIOStatCollector) Init(config json.RawMessage) error {
+	var err error = nil
+	m.name = "NfsIOStatCollector"
+	m.setup()
+	m.parallel = true
+	m.meta = map[string]string{"source": m.name, "group": "NFS", "unit": "bytes"}
+	m.tags = map[string]string{"type": "node"}
+	m.config.UseServerAddressAsSType = false
+	if len(config) > 0 {
+		err = json.Unmarshal(config, &m.config)
+		if err != nil {
+			cclog.ComponentError(m.name, "Error reading config:", err.Error())
+			return err
+		}
+	}
+	m.key = "mntpoint"
+	if m.config.UseServerAddressAsSType {
+		m.key = "server"
+	}
+	m.data = m.readNfsiostats()
+	m.init = true
+	return err
+}
+
+func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+	timestamp := time.Now()
+
+	// Get the current values for all mountpoints
+	newdata := m.readNfsiostats()
+
+	for mntpoint, values := range newdata {
+		// Was the mount point already present in the last iteration
+		if old, ok := m.data[mntpoint]; ok {
+			// Calculate the difference of old and new values
+			for i := range values {
+				x := values[i] - old[i]
+				y, err := lp.New(fmt.Sprintf("nfsio_%s", i), m.tags, m.meta, map[string]interface{}{"value": x}, timestamp)
+				if err == nil {
+					if strings.HasPrefix(i, "page") {
+						y.AddMeta("unit", "4K_Pages")
+					}
+					y.AddTag("stype", "filesystem")
+					y.AddTag("stype-id", mntpoint)
+					// Send it to output channel
+					output <- y
+				}
+				// Update old to the new value for the next iteration
+				old[i] = values[i]
+			}
+		} else {
+			// First time we see this mount point, store all values
+			m.data[mntpoint] = values
+		}
+	}
+	// Reset entries that do not exist anymore
+	for mntpoint := range m.data {
+		found := false
+		for new := range newdata {
+			if new == mntpoint {
+				found = true
+				break
+			}
+		}
+		if !found {
+			m.data[mntpoint] = nil
+		}
+	}
+
+}
+
+func (m *NfsIOStatCollector) Close() {
+	// Unset flag
+	m.init = false
+}

collectors/nfsiostatMetric.md

@@ -0,0 +1,27 @@
+## `nfsiostat` collector
+
+```json
+  "nfsiostat": {
+    "exclude_metrics": [
+      "nfsio_oread"
+    ],
+    "exclude_filesystems" : [
+        "/mnt",
+    ],
+    "use_server_as_stype": false
+  }
+```
+
+The `nfsiostat` collector reads data from `/proc/self/mountstats` and outputs a handful **node** metrics for each NFS filesystem. If a metric or filesystem is not required, it can be excluded from forwarding it to the sink.
+
+Metrics:
+* `nfsio_nread`: Bytes transferred by normal `read()` calls
+* `nfsio_nwrite`: Bytes transferred by normal `write()` calls
+* `nfsio_oread`: Bytes transferred by `read()` calls with `O_DIRECT`
+* `nfsio_owrite`: Bytes transferred by `write()` calls with `O_DIRECT`
+* `nfsio_pageread`: Pages transferred by `read()` calls
+* `nfsio_pagewrite`: Pages transferred by `write()` calls
+* `nfsio_nfsread`: Bytes transferred for reading from the server
+* `nfsio_nfswrite`: Pages transferred by writing to the server
+
+The `nfsiostat` collector adds the mountpoint to the tags as `stype=filesystem,stype-id=<mountpoint>`. If the server address should be used instead of the mountpoint, use the `use_server_as_stype` config setting.

collectors/numastatsMetric.go

@@ -10,33 +10,42 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
-//
-// Numa policy hit/miss statistics
+// Non-Uniform Memory Access (NUMA) policy hit/miss statistics
 //
 // numa_hit:
-//   A process wanted to allocate memory from this node, and succeeded.
+//
+//	A process wanted to allocate memory from this node, and succeeded.
+//
 // numa_miss:
-//   A process wanted to allocate memory from another node,
-//   but ended up with memory from this node.
+//
+//	A process wanted to allocate memory from another node,
+//	but ended up with memory from this node.
+//
 // numa_foreign:
-//   A process wanted to allocate on this node,
-//   but ended up with memory from another node.
+//
+//	A process wanted to allocate on this node,
+//	but ended up with memory from another node.
+//
 // local_node:
-//   A process ran on this node's CPU,
-//   and got memory from this node.
+//
+//	A process ran on this node's CPU,
+//	and got memory from this node.
+//
 // other_node:
-//   A process ran on a different node's CPU
-//   and got memory from this node.
+//
+//	A process ran on a different node's CPU
+//	and got memory from this node.
+//
 // interleave_hit:
-//   Interleaving wanted to allocate from this node
-//   and succeeded.
+//
+//	Interleaving wanted to allocate from this node
+//	and succeeded.
 //
 // See: https://www.kernel.org/doc/html/latest/admin-guide/numastat.html
-//
 type NUMAStatsCollectorTopolgy struct {
 	file   string
 	tagSet map[string]string
@@ -82,6 +91,8 @@ func (m *NUMAStatsCollector) Init(config json.RawMessage) error {
 			})
 	}
 
+	// Initialized
+	cclog.ComponentDebug(m.name, "initialized", len(m.topology), "NUMA domains")
 	m.init = true
 	return nil
 }

collectors/numastatsMetric.md

@@ -1,15 +1,17 @@
 
 ## `numastat` collector
+
 ```json
-  "numastat": {}
+  "numastats": {}
 ```
 
-The `numastat` collector reads data from `/sys/devices/system/node/node*/numastat` and outputs a handful **memoryDomain** metrics. See: https://www.kernel.org/doc/html/latest/admin-guide/numastat.html
+The `numastat` collector reads data from `/sys/devices/system/node/node*/numastat` and outputs a handful **memoryDomain** metrics. See: <https://www.kernel.org/doc/html/latest/admin-guide/numastat.html>
 
 Metrics:
+
 * `numastats_numa_hit`: A process wanted to allocate memory from this node, and succeeded.
 * `numastats_numa_miss`: A process wanted to allocate memory from another node, but ended up with memory from this node.
 * `numastats_numa_foreign`: A process wanted to allocate on this node, but ended up with memory from another node.
 * `numastats_local_node`: A process ran on this node's CPU, and got memory from this node.
 * `numastats_other_node`: A process ran on a different node's CPU, and got memory from this node.
-* `numastats_interleave_hit`: Interleaving wanted to allocate from this node and succeeded.
+* `numastats_interleave_hit`: Interleaving wanted to allocate from this node and succeeded.

collectors/nvidiaMetric.go

@@ -8,8 +8,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"github.com/NVIDIA/go-nvml/pkg/nvml"
 )
 
@@ -275,7 +275,7 @@ func readUtilization(device NvidiaCollectorDevice, output chan lp.CCMetric) erro
 		err := errors.New(nvml.ErrorString(ret))
 		return err
 	}
-	if !isMig {
+	if isMig {
 		return nil
 	}
 
@@ -620,7 +620,7 @@ func readEncUtilization(device NvidiaCollectorDevice, output chan lp.CCMetric) e
 		err := errors.New(nvml.ErrorString(ret))
 		return err
 	}
-	if !isMig {
+	if isMig {
 		return nil
 	}
 	if !device.excludeMetrics["nv_encoder_util"] {
@@ -647,7 +647,7 @@ func readDecUtilization(device NvidiaCollectorDevice, output chan lp.CCMetric) e
 		err := errors.New(nvml.ErrorString(ret))
 		return err
 	}
-	if !isMig {
+	if isMig {
 		return nil
 	}
 	if !device.excludeMetrics["nv_decoder_util"] {

collectors/raplMetric.go

@@ -0,0 +1,262 @@
+package collectors
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+)
+
+// running average power limit (RAPL) monitoring attributes for a zone
+type RAPLZoneInfo struct {
+	// tags describing the RAPL zone:
+	// * zone_name, subzone_name: e.g. psys, dram, core, uncore, package-0
+	// * zone_id: e.g. 0:1 (zone 0 sub zone 1)
+	tags            map[string]string
+	energyFilepath  string    // path to a file containing the zones current energy counter in micro joules
+	energy          int64     // current reading of the energy counter in micro joules
+	energyTimestamp time.Time // timestamp when energy counter was read
+	maxEnergyRange  int64     // Range of the above energy counter in micro-joules
+}
+
+type RAPLCollector struct {
+	metricCollector
+	config struct {
+		// Exclude IDs for RAPL zones, e.g.
+		// * 0 for zone 0
+		// * 0:1 for zone 0 subzone 1
+		ExcludeByID []string `json:"exclude_device_by_id,omitempty"`
+		// Exclude names for RAPL zones, e.g. psys, dram, core, uncore, package-0
+		ExcludeByName []string `json:"exclude_device_by_name,omitempty"`
+	}
+	RAPLZoneInfo []RAPLZoneInfo
+	meta         map[string]string // default meta information
+}
+
+// Init initializes the running average power limit (RAPL) collector
+func (m *RAPLCollector) Init(config json.RawMessage) error {
+
+	// Check if already initialized
+	if m.init {
+		return nil
+	}
+
+	var err error = nil
+	m.name = "RAPLCollector"
+	m.setup()
+	m.parallel = true
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "energy",
+		"unit":   "Watt",
+	}
+
+	// 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
+		}
+	}
+
+	// Configure excluded RAPL zones
+	isIDExcluded := make(map[string]bool)
+	if m.config.ExcludeByID != nil {
+		for _, ID := range m.config.ExcludeByID {
+			isIDExcluded[ID] = true
+		}
+	}
+	isNameExcluded := make(map[string]bool)
+	if m.config.ExcludeByName != nil {
+		for _, name := range m.config.ExcludeByName {
+			isNameExcluded[name] = true
+		}
+	}
+
+	// readZoneInfo reads RAPL monitoring attributes for a zone given by zonePath
+	// See: https://www.kernel.org/doc/html/latest/power/powercap/powercap.html#monitoring-attributes
+	readZoneInfo := func(zonePath string) (z struct {
+		name            string    // zones name e.g. psys, dram, core, uncore, package-0
+		energyFilepath  string    // path to a file containing the zones current energy counter in micro joules
+		energy          int64     // current reading of the energy counter in micro joules
+		energyTimestamp time.Time // timestamp when energy counter was read
+		maxEnergyRange  int64     // Range of the above energy counter in micro-joules
+		ok              bool      // Are all information available?
+	}) {
+		// zones name e.g. psys, dram, core, uncore, package-0
+		foundName := false
+		if v, err :=
+			os.ReadFile(
+				filepath.Join(zonePath, "name")); err == nil {
+			foundName = true
+			z.name = strings.TrimSpace(string(v))
+		}
+
+		// path to a file containing the zones current energy counter in micro joules
+		z.energyFilepath = filepath.Join(zonePath, "energy_uj")
+
+		// current reading of the energy counter in micro joules
+		foundEnergy := false
+		if v, err := os.ReadFile(z.energyFilepath); err == nil {
+			// timestamp when energy counter was read
+			z.energyTimestamp = time.Now()
+			if i, err := strconv.ParseInt(strings.TrimSpace(string(v)), 10, 64); err == nil {
+				foundEnergy = true
+				z.energy = i
+			}
+		}
+
+		// Range of the above energy counter in micro-joules
+		foundMaxEnergyRange := false
+		if v, err :=
+			os.ReadFile(
+				filepath.Join(zonePath, "max_energy_range_uj")); err == nil {
+			if i, err := strconv.ParseInt(strings.TrimSpace(string(v)), 10, 64); err == nil {
+				foundMaxEnergyRange = true
+				z.maxEnergyRange = i
+			}
+		}
+
+		// Are all information available?
+		z.ok = foundName && foundEnergy && foundMaxEnergyRange
+
+		return
+	}
+
+	powerCapPrefix := "/sys/devices/virtual/powercap"
+	controlType := "intel-rapl"
+	controlTypePath := filepath.Join(powerCapPrefix, controlType)
+
+	// Find all RAPL zones
+	zonePrefix := filepath.Join(controlTypePath, controlType+":")
+	zonesPath, err := filepath.Glob(zonePrefix + "*")
+	if err != nil || zonesPath == nil {
+		return fmt.Errorf("unable to find any zones under %s", controlTypePath)
+	}
+
+	for _, zonePath := range zonesPath {
+		zoneID := strings.TrimPrefix(zonePath, zonePrefix)
+		z := readZoneInfo(zonePath)
+		if z.ok &&
+			!isIDExcluded[zoneID] &&
+			!isNameExcluded[z.name] {
+
+			// Add RAPL monitoring attributes for a zone
+			m.RAPLZoneInfo =
+				append(
+					m.RAPLZoneInfo,
+					RAPLZoneInfo{
+						tags: map[string]string{
+							"id":        zoneID,
+							"zone_name": z.name,
+						},
+						energyFilepath:  z.energyFilepath,
+						energy:          z.energy,
+						energyTimestamp: z.energyTimestamp,
+						maxEnergyRange:  z.maxEnergyRange,
+					})
+		}
+
+		// find all sub zones for the given zone
+		subZonePrefix := filepath.Join(zonePath, controlType+":"+zoneID+":")
+		subZonesPath, err := filepath.Glob(subZonePrefix + "*")
+		if err != nil || subZonesPath == nil {
+			continue
+		}
+
+		for _, subZonePath := range subZonesPath {
+			subZoneID := strings.TrimPrefix(subZonePath, subZonePrefix)
+			sz := readZoneInfo(subZonePath)
+			if len(zoneID) > 0 && len(z.name) > 0 &&
+				sz.ok &&
+				!isIDExcluded[zoneID+":"+subZoneID] &&
+				!isNameExcluded[sz.name] {
+				m.RAPLZoneInfo =
+					append(
+						m.RAPLZoneInfo,
+						RAPLZoneInfo{
+							tags: map[string]string{
+								"id":            zoneID + ":" + subZoneID,
+								"zone_name":     z.name,
+								"sub_zone_name": sz.name,
+							},
+							energyFilepath:  sz.energyFilepath,
+							energy:          sz.energy,
+							energyTimestamp: sz.energyTimestamp,
+							maxEnergyRange:  sz.maxEnergyRange,
+						})
+			}
+		}
+	}
+
+	if m.RAPLZoneInfo == nil {
+		return fmt.Errorf("no running average power limit (RAPL) device found in %s", controlTypePath)
+
+	}
+
+	// Initialized
+	cclog.ComponentDebug(
+		m.name,
+		"initialized",
+		len(m.RAPLZoneInfo),
+		"zones with running average power limit (RAPL) monitoring attributes")
+	m.init = true
+
+	return err
+}
+
+// Read reads running average power limit (RAPL) monitoring attributes for all initialized zones
+// See: https://www.kernel.org/doc/html/latest/power/powercap/powercap.html#monitoring-attributes
+func (m *RAPLCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+
+	for i := range m.RAPLZoneInfo {
+		p := &m.RAPLZoneInfo[i]
+
+		// Read current value of the energy counter in micro joules
+		if v, err := os.ReadFile(p.energyFilepath); err == nil {
+			energyTimestamp := time.Now()
+			if i, err := strconv.ParseInt(strings.TrimSpace(string(v)), 10, 64); err == nil {
+				energy := i
+
+				// Compute average power (Δ energy / Δ time)
+				energyDiff := energy - p.energy
+				if energyDiff < 0 {
+					// Handle overflow:
+					// ( p.maxEnergyRange - p.energy ) + energy
+					// = p.maxEnergyRange + ( energy - p.energy )
+					// = p.maxEnergyRange + diffEnergy
+					energyDiff += p.maxEnergyRange
+				}
+				timeDiff := energyTimestamp.Sub(p.energyTimestamp)
+				averagePower := float64(energyDiff) / float64(timeDiff.Microseconds())
+
+				y, err := lp.New(
+					"rapl_average_power",
+					p.tags,
+					m.meta,
+					map[string]interface{}{"value": averagePower},
+					energyTimestamp)
+				if err == nil {
+					output <- y
+				}
+
+				// Save current energy counter state
+				p.energy = energy
+				p.energyTimestamp = energyTimestamp
+			}
+		}
+	}
+}
+
+// Close closes running average power limit (RAPL) metric collector
+func (m *RAPLCollector) Close() {
+	// Unset flag
+	m.init = false
+}

collectors/raplMetric.md

@@ -0,0 +1,18 @@
+# Running average power limit (RAPL) metric collector
+
+This collector reads running average power limit (RAPL) monitoring attributes to compute average power consumption metrics. See <https://www.kernel.org/doc/html/latest/power/powercap/powercap.html#monitoring-attributes>.
+
+The Likwid metric collector provides similar functionality.
+
+## Configuration
+
+```json
+  "rapl": {
+    "exclude_device_by_id": ["0:1", "0:2"],
+    "exclude_device_by_name": ["psys"]
+  }
+```
+
+## Metrics
+
+* `rapl_average_power`: average power consumption in Watt. The average is computed over the entire runtime from the last measurement to the current measurement

collectors/rocmsmiMetric.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"github.com/ClusterCockpit/go-rocm-smi/pkg/rocm_smi"
 )
 
@@ -66,14 +66,14 @@ func (m *RocmSmiCollector) Init(config json.RawMessage) error {
 
 	ret := rocm_smi.Init()
 	if ret != rocm_smi.STATUS_SUCCESS {
-		err = errors.New("Failed to initialize ROCm SMI library")
+		err = errors.New("failed to initialize ROCm SMI library")
 		cclog.ComponentError(m.name, err.Error())
 		return err
 	}
 
 	numDevs, ret := rocm_smi.NumMonitorDevices()
 	if ret != rocm_smi.STATUS_SUCCESS {
-		err = errors.New("Failed to get number of GPUs from ROCm SMI library")
+		err = errors.New("failed to get number of GPUs from ROCm SMI library")
 		cclog.ComponentError(m.name, err.Error())
 		return err
 	}
@@ -98,14 +98,14 @@ func (m *RocmSmiCollector) Init(config json.RawMessage) error {
 		}
 		device, ret := rocm_smi.DeviceGetHandleByIndex(i)
 		if ret != rocm_smi.STATUS_SUCCESS {
-			err = fmt.Errorf("Failed to get handle for GPU %d", i)
+			err = fmt.Errorf("failed to get handle for GPU %d", i)
 			cclog.ComponentError(m.name, err.Error())
 			return err
 		}
 
 		pciInfo, ret := rocm_smi.DeviceGetPciInfo(device)
 		if ret != rocm_smi.STATUS_SUCCESS {
-			err = fmt.Errorf("Failed to get PCI information for GPU %d", i)
+			err = fmt.Errorf("failed to get PCI information for GPU %d", i)
 			cclog.ComponentError(m.name, err.Error())
 			return err
 		}

collectors/sampleMetric.go

@@ -4,8 +4,8 @@ import (
 	"encoding/json"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 // These are the fields we read from the JSON configuration
@@ -17,9 +17,9 @@ type SampleCollectorConfig struct {
 // defined by metricCollector (name, init, ...)
 type SampleCollector struct {
 	metricCollector
-	config SampleTimerCollectorConfig // the configuration structure
-	meta   map[string]string          // default meta information
-	tags   map[string]string          // default tags
+	config SampleCollectorConfig // the configuration structure
+	meta   map[string]string     // default meta information
+	tags   map[string]string     // default tags
 }
 
 // Functions to implement MetricCollector interface
@@ -36,14 +36,14 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
 	// This is for later use, also call it early
 	m.setup()
 	// 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": "SAMPLE"}
 	// Define tags sent with each metric
-	// The 'type' tag is always needed, it defines the granulatity of the metric
+	// The 'type' tag is always needed, it defines the granularity of the metric
 	// node -> whole system
 	// socket -> CPU socket (requires socket ID as 'type-id' tag)
 	// die -> CPU die (requires CPU die ID as 'type-id' tag)

collectors/sampleTimerMetric.go

@@ -5,8 +5,8 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 // These are the fields we read from the JSON configuration
@@ -38,7 +38,7 @@ func (m *SampleTimerCollector) Init(name string, config json.RawMessage) error {
 	// (Can also be dynamic or this is the basic set with extension through AddMeta())
 	m.meta = map[string]string{"source": m.name, "group": "SAMPLE"}
 	// Define tags sent with each metric
-	// The 'type' tag is always needed, it defines the granulatity of the metric
+	// The 'type' tag is always needed, it defines the granularity of the metric
 	// node -> whole system
 	// socket -> CPU socket (requires socket ID as 'type-id' tag)
 	// cpu -> single CPU hardware thread (requires cpu ID as 'type-id' tag)
@@ -60,7 +60,7 @@ func (m *SampleTimerCollector) Init(name string, config json.RawMessage) error {
 
 	// Storage for output channel
 	m.output = nil
-	// Mangement channel for the timer function.
+	// Management channel for the timer function.
 	m.done = make(chan bool)
 	// Create the own ticker
 	m.ticker = time.NewTicker(m.interval)
@@ -94,7 +94,7 @@ func (m *SampleTimerCollector) ReadMetrics(timestamp time.Time) {
 
 	value := 1.0
 
-	// If you want to measure something for a specific amout of time, use interval
+	// If you want to measure something for a specific amount of time, use interval
 	// start := readState()
 	// time.Sleep(interval)
 	// stop := readState()

collectors/schedstatMetric.go

@@ -0,0 +1,154 @@
+package collectors
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"math"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+)
+
+const SCHEDSTATFILE = `/proc/schedstat`
+
+// These are the fields we read from the JSON configuration
+type SchedstatCollectorConfig struct {
+	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
+}
+
+// This contains all variables we need during execution and the variables
+// defined by metricCollector (name, init, ...)
+type SchedstatCollector struct {
+	metricCollector
+	config        SchedstatCollectorConfig     // the configuration structure
+	lastTimestamp time.Time                    // Store time stamp of last tick to derive values
+	meta          map[string]string            // default meta information
+	cputags       map[string]map[string]string // default tags
+	olddata       map[string]map[string]int64  // default tags
+}
+
+// Functions to implement MetricCollector interface
+// Init(...), Read(...), Close()
+// See: metricCollector.go
+
+// Init initializes the sample collector
+// 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()
+	// 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
+	// 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"}
+
+	// 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
+		}
+	}
+
+	// Check input file
+	file, err := os.Open(string(SCHEDSTATFILE))
+	if err != nil {
+		cclog.ComponentError(m.name, err.Error())
+	}
+	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)
+	for scanner.Scan() {
+		line := scanner.Text()
+		linefields := strings.Fields(line)
+		if strings.HasPrefix(linefields[0], "cpu") && strings.Compare(linefields[0], "cpu") != 0 {
+			cpustr := strings.TrimLeft(linefields[0], "cpu")
+			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++
+		}
+	}
+
+	// Save current timestamp
+	m.lastTimestamp = time.Now()
+
+	// Set this flag only if everything is initialized properly, all required files exist, ...
+	m.init = true
+	return err
+}
+
+func (m *SchedstatCollector) ParseProcLine(linefields []string, tags map[string]string, output chan lp.CCMetric, now time.Time, tsdelta time.Duration) {
+	running, _ := strconv.ParseInt(linefields[7], 10, 64)
+	waiting, _ := strconv.ParseInt(linefields[8], 10, 64)
+	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))
+
+	m.olddata[linefields[0]]["running"] = running
+	m.olddata[linefields[0]]["waiting"] = waiting
+	value := l_running + l_waiting
+
+	y, err := lp.New("cpu_load_core", tags, m.meta, map[string]interface{}{"value": value}, now)
+	if err == nil {
+		// Send it to output channel
+		output <- y
+	}
+}
+
+// Read collects all metrics belonging to the sample collector
+// and sends them through the output channel to the collector manager
+func (m *SchedstatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+	if !m.init {
+		return
+	}
+
+	//timestamps
+	now := time.Now()
+	tsdelta := now.Sub(m.lastTimestamp)
+
+	file, err := os.Open(string(SCHEDSTATFILE))
+	if err != nil {
+		cclog.ComponentError(m.name, err.Error())
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		linefields := strings.Fields(line)
+		if strings.HasPrefix(linefields[0], "cpu") {
+			m.ParseProcLine(linefields, m.cputags[linefields[0]], output, now, tsdelta)
+		}
+	}
+
+	m.lastTimestamp = now
+
+}
+
+// Close metric collector: close network connection, close files, close libraries, ...
+// Called once by the collector manager
+func (m *SchedstatCollector) Close() {
+	// Unset flag
+	m.init = false
+}

collectors/schedstatMetric.md

@@ -0,0 +1,11 @@
+
+## `schedstat` collector
+```json
+  "schedstat": {
+  }
+```
+
+The `schedstat` collector reads data from /proc/schedstat and calculates a load value, separated by hwthread. This might be useful to detect bad cpu pinning on shared nodes etc. 
+
+Metric:
+* `cpu_load_core`

collectors/selfMetric.go

@@ -0,0 +1,144 @@
+package collectors
+
+import (
+	"encoding/json"
+	"runtime"
+	"syscall"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+)
+
+type SelfCollectorConfig struct {
+	MemStats   bool `json:"read_mem_stats"`
+	GoRoutines bool `json:"read_goroutines"`
+	CgoCalls   bool `json:"read_cgo_calls"`
+	Rusage     bool `json:"read_rusage"`
+}
+
+type SelfCollector struct {
+	metricCollector
+	config SelfCollectorConfig // the configuration structure
+	meta   map[string]string   // default meta information
+	tags   map[string]string   // default tags
+}
+
+func (m *SelfCollector) Init(config json.RawMessage) error {
+	var err error = nil
+	m.name = "SelfCollector"
+	m.setup()
+	m.parallel = true
+	m.meta = map[string]string{"source": m.name, "group": "Self"}
+	m.tags = map[string]string{"type": "node"}
+	if len(config) > 0 {
+		err = json.Unmarshal(config, &m.config)
+		if err != nil {
+			cclog.ComponentError(m.name, "Error reading config:", err.Error())
+			return err
+		}
+	}
+	m.init = true
+	return err
+}
+
+func (m *SelfCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+	timestamp := time.Now()
+
+	if m.config.MemStats {
+		var memstats runtime.MemStats
+		runtime.ReadMemStats(&memstats)
+
+		y, err := lp.New("total_alloc", m.tags, m.meta, map[string]interface{}{"value": memstats.TotalAlloc}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_alloc", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapAlloc}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_sys", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapSys}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_idle", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapIdle}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_inuse", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapInuse}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_released", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapReleased}, timestamp)
+		if err == nil {
+			y.AddMeta("unit", "Bytes")
+			output <- y
+		}
+		y, err = lp.New("heap_objects", m.tags, m.meta, map[string]interface{}{"value": memstats.HeapObjects}, timestamp)
+		if err == nil {
+			output <- y
+		}
+	}
+	if m.config.GoRoutines {
+		y, err := lp.New("num_goroutines", m.tags, m.meta, map[string]interface{}{"value": runtime.NumGoroutine()}, timestamp)
+		if err == nil {
+			output <- y
+		}
+	}
+	if m.config.CgoCalls {
+		y, err := lp.New("num_cgo_calls", m.tags, m.meta, map[string]interface{}{"value": runtime.NumCgoCall()}, timestamp)
+		if err == nil {
+			output <- y
+		}
+	}
+	if m.config.Rusage {
+		var rusage syscall.Rusage
+		err := syscall.Getrusage(syscall.RUSAGE_SELF, &rusage)
+		if err == nil {
+			sec, nsec := rusage.Utime.Unix()
+			t := float64(sec) + (float64(nsec) * 1e-9)
+			y, err := lp.New("rusage_user_time", m.tags, m.meta, map[string]interface{}{"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.New("rusage_system_time", m.tags, m.meta, map[string]interface{}{"value": t}, timestamp)
+			if err == nil {
+				y.AddMeta("unit", "seconds")
+				output <- y
+			}
+			y, err = lp.New("rusage_vol_ctx_switch", m.tags, m.meta, map[string]interface{}{"value": rusage.Nvcsw}, timestamp)
+			if err == nil {
+				output <- y
+			}
+			y, err = lp.New("rusage_invol_ctx_switch", m.tags, m.meta, map[string]interface{}{"value": rusage.Nivcsw}, timestamp)
+			if err == nil {
+				output <- y
+			}
+			y, err = lp.New("rusage_signals", m.tags, m.meta, map[string]interface{}{"value": rusage.Nsignals}, timestamp)
+			if err == nil {
+				output <- y
+			}
+			y, err = lp.New("rusage_major_pgfaults", m.tags, m.meta, map[string]interface{}{"value": rusage.Majflt}, timestamp)
+			if err == nil {
+				output <- y
+			}
+			y, err = lp.New("rusage_minor_pgfaults", m.tags, m.meta, map[string]interface{}{"value": rusage.Minflt}, timestamp)
+			if err == nil {
+				output <- y
+			}
+		}
+
+	}
+}
+
+func (m *SelfCollector) Close() {
+	m.init = false
+}

collectors/selfMetric.md

@@ -0,0 +1,34 @@
+## `self` collector
+
+```json
+  "self": {
+    "read_mem_stats" : true,
+    "read_goroutines" : true,
+    "read_cgo_calls" : true,
+    "read_rusage" : true
+  }
+```
+
+The `self` collector reads the data from the `runtime` and `syscall` packages, so monitors the execution of the cc-metric-collector itself.
+
+Metrics:
+* If `read_mem_stats == true`:
+  * `total_alloc`: The metric reports cumulative bytes allocated for heap objects.
+  * `heap_alloc`: The metric reports bytes of allocated heap objects.
+  * `heap_sys`: The metric reports bytes of heap memory obtained from the OS.
+  * `heap_idle`: The metric reports bytes in idle (unused) spans.
+  * `heap_inuse`: The metric reports bytes in in-use spans.
+  * `heap_released`: The metric reports bytes of physical memory returned to the OS.
+  * `heap_objects`: The metric reports the number of allocated heap objects.
+* If `read_goroutines == true`:
+  * `num_goroutines`: The metric reports the number of goroutines that currently exist.
+* If `read_cgo_calls == true`:
+  * `num_cgo_calls`: The metric reports the number of cgo calls made by the current process.
+* If `read_rusage == true`:
+  * `rusage_user_time`: The metric reports the amount of time that this process has been scheduled in user mode.
+  * `rusage_system_time`: The metric reports the amount of time that this process has been scheduled in kernel mode.
+  * `rusage_vol_ctx_switch`: The metric reports the amount of voluntary context switches.
+  * `rusage_invol_ctx_switch`: The metric reports the amount of involuntary context switches.
+  * `rusage_signals`: The metric reports the number of signals received.
+  * `rusage_major_pgfaults`: The metric reports the number of major faults the process has made which have required loading a memory page from disk.
+  * `rusage_minor_pgfaults`: The metric reports the number of minor faults the process has made which have not required loading a memory page from disk.

collectors/tempMetric.go

@@ -3,14 +3,14 @@ package collectors
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 // See: https://www.kernel.org/doc/html/latest/hwmon/sysfs-interface.html
@@ -83,14 +83,14 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 
 		// sensor name
 		nameFile := filepath.Join(filepath.Dir(file), "name")
-		name, err := ioutil.ReadFile(nameFile)
+		name, err := os.ReadFile(nameFile)
 		if err == nil {
 			sensor.name = strings.TrimSpace(string(name))
 		}
 
 		// sensor label
 		labelFile := strings.TrimSuffix(file, "_input") + "_label"
-		label, err := ioutil.ReadFile(labelFile)
+		label, err := os.ReadFile(labelFile)
 		if err == nil {
 			sensor.label = strings.TrimSpace(string(label))
 		}
@@ -117,7 +117,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 		}
 
 		// Sensor file
-		_, err = ioutil.ReadFile(file)
+		_, err = os.ReadFile(file)
 		if err != nil {
 			continue
 		}
@@ -139,7 +139,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 		// max temperature
 		if m.config.ReportMaxTemp {
 			maxTempFile := strings.TrimSuffix(file, "_input") + "_max"
-			if buffer, err := ioutil.ReadFile(maxTempFile); err == nil {
+			if buffer, err := os.ReadFile(maxTempFile); err == nil {
 				if x, err := strconv.ParseInt(strings.TrimSpace(string(buffer)), 10, 64); err == nil {
 					sensor.maxTempName = strings.Replace(sensor.metricName, "temp", "max_temp", 1)
 					sensor.maxTemp = x / 1000
@@ -150,7 +150,7 @@ func (m *TempCollector) Init(config json.RawMessage) error {
 		// critical temperature
 		if m.config.ReportCriticalTemp {
 			criticalTempFile := strings.TrimSuffix(file, "_input") + "_crit"
-			if buffer, err := ioutil.ReadFile(criticalTempFile); err == nil {
+			if buffer, err := os.ReadFile(criticalTempFile); err == nil {
 				if x, err := strconv.ParseInt(strings.TrimSpace(string(buffer)), 10, 64); err == nil {
 					sensor.critTempName = strings.Replace(sensor.metricName, "temp", "crit_temp", 1)
 					sensor.critTemp = x / 1000
@@ -175,7 +175,7 @@ func (m *TempCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 
 	for _, sensor := range m.sensors {
 		// Read sensor file
-		buffer, err := ioutil.ReadFile(sensor.file)
+		buffer, err := os.ReadFile(sensor.file)
 		if err != nil {
 			cclog.ComponentError(
 				m.name,

collectors/topprocsMetric.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 	"time"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const MAX_NUM_PROCS = 10

docs/building.md

@@ -0,0 +1,74 @@
+# Building the cc-metric-collector
+
+In most cases, a simple `make` in the main folder is enough to get a `cc-metric-collector` binary. It is basically a `go build` but some collectors require additional tasks. There is currently no Golang interface to LIKWID, so it uses `cgo` to create bindings but `cgo` requires the LIKWID header files. Therefore, it checks whether LIKWID is installed and if not it downloads LIKWID and copies the headers.
+
+## System integration
+
+The main configuration settings for system integration are pre-defined in `scripts/cc-metric-collector.config`. The file contains the UNIX user and group used for execution, the PID file location and other settings. Adjust it accordingly and copy it to `/etc/default/cc-metric-collector`
+
+```bash
+$ install --mode 644 \
+          --owner $CC_USER \
+          --group $CC_GROUP \
+          scripts/cc-metric-collector.config /etc/default/cc-metric-collector
+$ edit /etc/default/cc-metric-collector
+```
+
+### SysVinit and similar
+
+If you are using a init system based in `/etc/init.d` daemons, you can use the sample `scripts/cc-metric-collector.init`. It reads the basic configuration from `/etc/default/cc-metric-collector`
+
+```bash
+$ install --mode 755 \
+          --owner $CC_USER \
+          --group $CC_GROUP \
+          scripts/cc-metric-collector.init /etc/init.d/cc-metric-collector
+```
+
+### Systemd
+
+If you are using `systemd` as init system, you can use the sample systemd service file `scripts/cc-metric-collector.service`, the configuration file `scripts/cc-metric-collector.config`.
+
+```bash
+$ install --mode 644  \
+          --owner $CC_USER \
+          --group $CC_GROUP \
+           scripts/cc-metric-collector.service /etc/systemd/system/cc-metric-collector.service
+$ systemctl enable cc-metric-collector
+```
+
+## Packaging
+
+### RPM
+
+In order to get a RPM packages for cc-metric-collector, just use:
+
+```bash
+$ make RPM
+```
+
+It uses the RPM SPEC file `scripts/cc-metric-collector.spec` and requires the RPM tools (`rpm` and `rpmspec`) and `git`.
+
+### DEB
+
+In order to get very simple Debian packages for cc-metric-collector, just use:
+
+```bash
+$ make DEB
+```
+
+It uses the DEB control file `scripts/cc-metric-collector.control` and requires `dpkg-deb`, `awk`, `sed` and `git`. It creates only a binary deb package.
+
+_This option is not well tested and therefore experimental_
+
+### Customizing RPMs or DEB packages
+
+If you want to customize the RPMs or DEB packages for your local system, use the following workflow.
+
+- (if there is already a fork in the private account, delete it and wait until Github realizes the deletion)
+- Fork the cc-metric-collector repository (if Github hasn't realized it, it creates a fork named cc-metric-collector2)
+- Go to private cc-metric-collector repository and enable Github Actions
+- Do changes to the scripts, code, ... Commit and push your changes.
+- Tag the new commit with `v0.x.y-<myversion>` (`git tag v0.x.y-<myversion>`)
+- Push tags to repository (`git push --tags`)
+- Wait until the Release action finishes. It creates fresh RPMs and DEBs in your private repository on the Releases page.

docs/introduction.md

@@ -0,0 +1,23 @@
+# The ClusterCockpit Project
+
+The ClusterCockpit project is a joined project of computing centers in Europe to set up a cluster monitoring stack for small to mid-sized computing centers under the lead of NHR@FAU.
+
+# The ClusterCockpit Stack
+
+In cluster environment, there are commonly a lot of systems dedicated for computation, backend servers for file systems and frontend servers for the user interaction and cluster control. The ClusterCockpit Stack is mainly used for monitoring the compute systems with some interaction to the frontend servers. It consists of multiple components:
+
+- cc-metric-collector: Monitor resource usage on the compute systems
+- cc-metric-store: In-memory database
+- cc-backend & cc-frontend: The web-based visualizer
+
+# CC Metric Collector
+
+The CC Metric Collector project was started to provide a useful set of metrics for HPC and data science related compute systems. It runs as a system daemon and gathers system data periodically to forward the metrics to one or more databases. One of the provided backends can be used for the cc-metric-store but many others exist like InfluxDB time-series databases, the Ganglia Monitoring System or the Prometheus Monitoring System.
+
+The data is gathered by so-called "Collectors", forwarded to an internal router for on-the-fly manipulation (tagging, aggregation, ...) which pushes the metrics to the different metric writers called "Sinks". There is a forth component, the "Receivers", which receive data through some networking system like a HTTP server at any time.
+
+# CC Metric Store
+The CC Metric Store is a data management system with short-term in-memory and long-term file-base metric storage.
+
+# CC Backend and CC Frontend
+The CC Backend and Frontend form together the web interface for ClusterCockpit.

go.mod

@@ -1,35 +1,41 @@
 module github.com/ClusterCockpit/cc-metric-collector
 
-go 1.17
+go 1.18
 
 require (
-	github.com/ClusterCockpit/cc-units v0.0.0-20220318130935-92a0c6442220
+	github.com/ClusterCockpit/cc-units v0.3.0
+	github.com/ClusterCockpit/go-rocm-smi v0.3.0
 	github.com/NVIDIA/go-nvml v0.11.6-0
-	github.com/PaesslerAG/gval v1.1.2
+	github.com/PaesslerAG/gval v1.2.1
 	github.com/gorilla/mux v1.8.0
-	github.com/influxdata/influxdb-client-go/v2 v2.8.1
+	github.com/influxdata/influxdb-client-go/v2 v2.12.1
 	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/nats-io/nats.go v1.14.0
-	github.com/prometheus/client_golang v1.12.1
+	github.com/nats-io/nats.go v1.21.0
+	github.com/prometheus/client_golang v1.14.0
 	github.com/stmcginnis/gofish v0.13.0
-	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
+	github.com/tklauser/go-sysconf v0.3.11
+	golang.org/x/sys v0.3.0
 )
 
+
 require (
+	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/deepmap/oapi-codegen v1.8.2 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/deepmap/oapi-codegen v1.12.4 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
-	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/nats-io/nats-server/v2 v2.8.4 // indirect
 	github.com/nats-io/nkeys v0.3.0 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.32.1 // indirect
-	github.com/prometheus/procfs v0.7.3 // indirect
-	golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce // indirect
-	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
-	google.golang.org/protobuf v1.26.0 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/shopspring/decimal v1.3.1 // indirect
+	github.com/tklauser/numcpus v0.6.0 // indirect
+	golang.org/x/crypto v0.3.0 // indirect
+	golang.org/x/net v0.3.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 )

go.mod.1.16

@@ -1,16 +0,0 @@
-module github.com/ClusterCockpit/cc-metric-collector
-
-go 1.16
-
-require (
-	github.com/NVIDIA/go-nvml v0.11.6-0
-	github.com/PaesslerAG/gval v1.1.2
-	github.com/gorilla/mux v1.8.0
-	github.com/influxdata/influxdb-client-go/v2 v2.7.0
-	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
-	github.com/nats-io/nats.go v1.14.0
-	github.com/prometheus/client_golang v1.12.1
-	github.com/stmcginnis/gofish v0.13.0
-	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
-)

go.mod.1.17+

@@ -1,16 +0,0 @@
-module github.com/ClusterCockpit/cc-metric-collector
-
-go 1.17
-
-require (
-	github.com/NVIDIA/go-nvml v0.11.6-0
-	github.com/PaesslerAG/gval v1.1.2
-	github.com/gorilla/mux v1.8.0
-	github.com/influxdata/influxdb-client-go/v2 v2.8.1
-	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/nats-io/nats-server/v2 v2.8.0 // indirect
-	github.com/nats-io/nats.go v1.14.0
-	github.com/prometheus/client_golang v1.12.1
-	github.com/stmcginnis/gofish v0.13.0
-	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
-)

go.sum

@@ -1,145 +1,624 @@
-github.com/NVIDIA/go-nvml v0.11.1-0 h1:XHSz3zZKC4NCP2ja1rI7++DXFhA+uDhdYa3MykCTGHY=
-github.com/NVIDIA/go-nvml v0.11.1-0/go.mod h1:hy7HYeQy335x6nEss0Ne3PYqleRa6Ct+VKD9RQ4nyFs=
-github.com/PaesslerAG/gval v1.1.2 h1:EROKxV4/fAKWb0Qoj7NOxmHZA7gcpjOV9XgiRZMRCUU=
-github.com/PaesslerAG/gval v1.1.2/go.mod h1:Fa8gfkCmUsELXgayr8sfL/sw+VzCVoa03dcOcR/if2w=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
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+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
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+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
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+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
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+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

internal/ccMetric/README.md

@@ -1,32 +0,0 @@
-# ClusterCockpit metrics
-
-As described in the [ClusterCockpit specifications](https://github.com/ClusterCockpit/cc-specifications), the whole ClusterCockpit stack uses metrics in the InfluxDB line protocol format. This is also the input and output format for the ClusterCockpit Metric Collector but internally it uses an extended format while processing, named CCMetric.
-
-It is basically a copy of the [InfluxDB line protocol](https://github.com/influxdata/line-protocol) `MutableMetric` interface with one extension. Besides the tags and fields, it contains a list of meta information (re-using the `Tag` structure of the original protocol):
-
-```golang
-type ccMetric struct {
-    name   string            // same as
-    tags   []*influx.Tag     // original
-    fields []*influx.Field   // Influx
-    tm     time.Time         // line-protocol
-    meta   []*influx.Tag
-}
-
-type CCMetric interface {
-    influx.MutableMetric        // the same functions as defined by influx.MutableMetric
-    RemoveTag(key string)       // this is not published by the original influx.MutableMetric
-    Meta() map[string]string
-    MetaList() []*inlux.Tag
-    AddMeta(key, value string)
-    HasMeta(key string) bool
-    GetMeta(key string) (string, bool)
-    RemoveMeta(key string)
-}
-```
-
-The `CCMetric` interface provides the same functions as the `MutableMetric` like `{Add, Remove, Has}{Tag, Field}` and additionally provides `{Add, Remove, Has}Meta`.
-
-The InfluxDB protocol creates a new metric with `influx.New(name, tags, fields, time)` while CCMetric uses `ccMetric.New(name, tags, meta, fields, time)` where `tags` and `meta` are both of type `map[string]string`.
-
-You can copy a CCMetric with `FromMetric(other CCMetric) CCMetric`. If you get an `influx.Metric` from a function, like the line protocol parser, you can use `FromInfluxMetric(other influx.Metric) CCMetric` to get a CCMetric out of it (see `NatsReceiver` for an example).

internal/metricAggregator/metricAggregator.go

@@ -9,10 +9,10 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
-	topo "github.com/ClusterCockpit/cc-metric-collector/internal/ccTopology"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 
 	"github.com/PaesslerAG/gval"
 )

internal/metricAggregator/metricAggregatorFunctions.go

@@ -8,8 +8,8 @@ import (
 	"sort"
 	"strings"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	topo "github.com/ClusterCockpit/cc-metric-collector/internal/ccTopology"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 )
 
 /*

internal/metricRouter/metricCache.go

@@ -4,11 +4,11 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
-	mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 )
 
 type metricCachePeriod struct {

internal/metricRouter/metricRouter.go

@@ -7,11 +7,11 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 	agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
-	mct "github.com/ClusterCockpit/cc-metric-collector/internal/multiChanTicker"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	mct "github.com/ClusterCockpit/cc-metric-collector/pkg/multiChanTicker"
 	units "github.com/ClusterCockpit/cc-units"
 )
 

pkg/ccMetric/README.md

@@ -0,0 +1,57 @@
+# ClusterCockpit metrics
+
+As described in the [ClusterCockpit specifications](https://github.com/ClusterCockpit/cc-specifications), the whole ClusterCockpit stack uses metrics in the InfluxDB line protocol format. This is also the input and output format for the ClusterCockpit Metric Collector but internally it uses an extended format while processing, named CCMetric.
+
+It is basically a copy of the [InfluxDB line protocol](https://github.com/influxdata/line-protocol) `MutableMetric` interface with one extension. Besides the tags and fields, it contains a list of meta information (re-using the `Tag` structure of the original protocol):
+
+```golang
+type ccMetric struct {
+    name   string                 // Measurement name
+    meta   map[string]string      // map of meta data tags
+    tags   map[string]string      // map of of tags
+    fields map[string]interface{} // map of of fields
+    tm     time.Time              // timestamp
+}
+
+type CCMetric interface {
+    ToPoint(metaAsTags map[string]bool) *write.Point  // Generate influxDB point for data type ccMetric
+    ToLineProtocol(metaAsTags map[string]bool) string // Generate influxDB line protocol for data type ccMetric
+    String() string                                   // Return line-protocol like string
+
+    Name() string        // Get metric name
+    SetName(name string) // Set metric name
+
+    Time() time.Time     // Get timestamp
+    SetTime(t time.Time) // Set timestamp
+
+    Tags() map[string]string                   // Map of tags
+    AddTag(key, value string)                  // Add a tag
+    GetTag(key string) (value string, ok bool) // Get a tag by its key
+    HasTag(key string) (ok bool)               // Check if a tag key is present
+    RemoveTag(key string)                      // Remove a tag by its key
+
+    Meta() map[string]string                    // Map of meta data tags
+    AddMeta(key, value string)                  // Add a meta data tag
+    GetMeta(key string) (value string, ok bool) // Get a meta data tab addressed by its key
+    HasMeta(key string) (ok bool)               // Check if a meta data key is present
+    RemoveMeta(key string)                      // Remove a meta data tag by its key
+
+    Fields() map[string]interface{}                   // Map of fields
+    AddField(key string, value interface{})           // Add a field
+    GetField(key string) (value interface{}, ok bool) // Get a field addressed by its key
+    HasField(key string) (ok bool)                    // Check if a field key is present
+    RemoveField(key string)                           // Remove a field addressed by its key
+}
+
+func New(name string, tags map[string]string, meta map[string]string, fields map[string]interface{}, tm time.Time) (CCMetric, error)
+func FromMetric(other CCMetric) CCMetric
+func FromInfluxMetric(other lp.Metric) CCMetric
+```
+
+The `CCMetric` interface provides the same functions as the `MutableMetric` like `{Add, Get, Remove, Has}{Tag, Field}` and additionally provides `{Add, Get, Remove, Has}Meta`.
+
+The InfluxDB protocol creates a new metric with `influx.New(name, tags, fields, time)` while CCMetric uses `ccMetric.New(name, tags, meta, fields, time)` where `tags` and `meta` are both of type `map[string]string`.
+
+You can copy a CCMetric with `FromMetric(other CCMetric) CCMetric`. If you get an `influx.Metric` from a function, like the line protocol parser, you can use `FromInfluxMetric(other influx.Metric) CCMetric` to get a CCMetric out of it (see `NatsReceiver` for an example).
+
+Although the [cc-specifications](https://github.com/ClusterCockpit/cc-specifications/blob/master/interfaces/lineprotocol/README.md) defines that there is only a `value` field for the metric value, the CCMetric still can have multiple values similar to the InfluxDB line protocol.

pkg/ccMetric/ccMetric.go

@@ -50,6 +50,7 @@ type CCMetric interface {
 	GetField(key string) (value interface{}, ok bool) // Get a field addressed by its key
 	HasField(key string) (ok bool)                    // Check if a field key is present
 	RemoveField(key string)                           // Remove a field addressed by its key
+	String() string                                   // Return line-protocol like string
 }
 
 // String implements the stringer interface for data type ccMetric
@@ -217,23 +218,26 @@ func New(
 }
 
 // FromMetric copies the metric <other>
-func FromMetric(other ccMetric) CCMetric {
+func FromMetric(other CCMetric) CCMetric {
+	otags := other.Tags()
+	ometa := other.Meta()
+	ofields := other.Fields()
 	m := &ccMetric{
 		name:   other.Name(),
-		tags:   make(map[string]string, len(other.tags)),
-		meta:   make(map[string]string, len(other.meta)),
-		fields: make(map[string]interface{}, len(other.fields)),
+		tags:   make(map[string]string, len(otags)),
+		meta:   make(map[string]string, len(ometa)),
+		fields: make(map[string]interface{}, len(ofields)),
 		tm:     other.Time(),
 	}
 
 	// deep copy tags, meta data tags and fields
-	for key, value := range other.tags {
+	for key, value := range otags {
 		m.tags[key] = value
 	}
-	for key, value := range other.meta {
+	for key, value := range ometa {
 		m.meta[key] = value
 	}
-	for key, value := range other.fields {
+	for key, value := range ofields {
 		m.fields[key] = value
 	}
 	return m

pkg/ccTopology/ccTopology.go

@@ -10,7 +10,7 @@ import (
 	"strconv"
 	"strings"
 
-	cclogger "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclogger "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 )
 
 const SYSFS_NUMABASE = `/sys/devices/system/node`

pkg/hostlist/hostlist.go

@@ -0,0 +1,125 @@
+package hostlist
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func Expand(in string) (result []string, err error) {
+
+	// Create ranges regular expression
+	reStNumber := "[[:digit:]]+"
+	reStRange := reStNumber + "-" + reStNumber
+	reStOptionalNumberOrRange := "(" + reStNumber + ",|" + reStRange + ",)*"
+	reStNumberOrRange := "(" + reStNumber + "|" + reStRange + ")"
+	reStBraceLeft := "[[]"
+	reStBraceRight := "[]]"
+	reStRanges := reStBraceLeft +
+		reStOptionalNumberOrRange +
+		reStNumberOrRange +
+		reStBraceRight
+	reRanges := regexp.MustCompile(reStRanges)
+
+	// Create host list regular expression
+	reStDNSChars := "[a-zA-Z0-9-]+"
+	reStPrefix := "^(" + reStDNSChars + ")"
+	reStOptionalSuffix := "(" + reStDNSChars + ")?"
+	re := regexp.MustCompile(reStPrefix + "([[][0-9,-]+[]])?" + reStOptionalSuffix)
+
+	// Remove all delimiters from the input
+	in = strings.TrimLeft(in, ", ")
+
+	for len(in) > 0 {
+		if v := re.FindStringSubmatch(in); v != nil {
+
+			// Remove matched part from the input
+			lenPrefix := len(v[0])
+			in = in[lenPrefix:]
+
+			// Remove all delimiters from the input
+			in = strings.TrimLeft(in, ", ")
+
+			// matched prefix, range and suffix
+			hlPrefix := v[1]
+			hlRanges := v[2]
+			hlSuffix := v[3]
+
+			// Single node without ranges
+			if hlRanges == "" {
+				result = append(result, hlPrefix)
+				continue
+			}
+
+			// Node with ranges
+			if v := reRanges.FindStringSubmatch(hlRanges); v != nil {
+
+				// Remove braces
+				hlRanges = hlRanges[1 : len(hlRanges)-1]
+
+				// Split host ranges at ,
+				for _, hlRange := range strings.Split(hlRanges, ",") {
+
+					// Split host range at -
+					RangeStartEnd := strings.Split(hlRange, "-")
+
+					// Range is only a single number
+					if len(RangeStartEnd) == 1 {
+						result = append(result, hlPrefix+RangeStartEnd[0]+hlSuffix)
+						continue
+					}
+
+					// Range has a start and an end
+					widthRangeStart := len(RangeStartEnd[0])
+					widthRangeEnd := len(RangeStartEnd[1])
+					iStart, _ := strconv.ParseUint(RangeStartEnd[0], 10, 64)
+					iEnd, _ := strconv.ParseUint(RangeStartEnd[1], 10, 64)
+					if iStart > iEnd {
+						return nil, fmt.Errorf("single range start is greater than end: %s", hlRange)
+					}
+
+					// Create print format string for range numbers
+					doPadding := widthRangeStart == widthRangeEnd
+					widthPadding := widthRangeStart
+					var formatString string
+					if doPadding {
+						formatString = "%0" + fmt.Sprint(widthPadding) + "d"
+					} else {
+						formatString = "%d"
+					}
+					formatString = hlPrefix + formatString + hlSuffix
+
+					// Add nodes from this range
+					for i := iStart; i <= iEnd; i++ {
+						result = append(result, fmt.Sprintf(formatString, i))
+					}
+				}
+			} else {
+				return nil, fmt.Errorf("not at hostlist range: %s", hlRanges)
+			}
+		} else {
+			return nil, fmt.Errorf("not a hostlist: %s", in)
+		}
+	}
+
+	if result != nil {
+		// sort
+		sort.Strings(result)
+
+		// uniq
+		previous := 1
+		for current := 1; current < len(result); current++ {
+			if result[current-1] != result[current] {
+				if previous != current {
+					result[previous] = result[current]
+				}
+				previous++
+			}
+		}
+		result = result[:previous]
+	}
+
+	return
+}

pkg/hostlist/hostlist_test.go

@@ -0,0 +1,126 @@
+package hostlist
+
+import (
+	"testing"
+)
+
+func TestExpand(t *testing.T) {
+
+	// Compare two slices of strings
+	equal := func(a, b []string) bool {
+		if len(a) != len(b) {
+			return false
+		}
+		for i, v := range a {
+			if v != b[i] {
+				return false
+			}
+		}
+		return true
+	}
+
+	type testDefinition struct {
+		input          string
+		resultExpected []string
+		errorExpected  bool
+	}
+
+	expandTests := []testDefinition{
+		{
+			// Single node
+			input:          "n1",
+			resultExpected: []string{"n1"},
+			errorExpected:  false,
+		},
+		{
+			// Single node, duplicated
+			input:          "n1,n1",
+			resultExpected: []string{"n1"},
+			errorExpected:  false,
+		},
+		{
+			// Single node with padding
+			input:          "n[01]",
+			resultExpected: []string{"n01"},
+			errorExpected:  false,
+		},
+		{
+			// Single node with suffix
+			input:          "n[01]-p",
+			resultExpected: []string{"n01-p"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with a single range
+			input:          "n[1-2]",
+			resultExpected: []string{"n1", "n2"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with a single range and a single index
+			input:          "n[1-2,3]",
+			resultExpected: []string{"n1", "n2", "n3"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with different prefixes
+			input:          "n[1-2],m[1,2]",
+			resultExpected: []string{"m1", "m2", "n1", "n2"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with different suffixes
+			input:          "n[1-2]-p,n[1,2]-q",
+			resultExpected: []string{"n1-p", "n1-q", "n2-p", "n2-q"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with and without node ranges
+			input:          " n09, n[01-04,06-07,09] , , n10,n04",
+			resultExpected: []string{"n01", "n02", "n03", "n04", "n06", "n07", "n09", "n10"},
+			errorExpected:  false,
+		},
+		{
+			// Forbidden DNS character
+			input:          "n@",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+		{
+			// Forbidden range
+			input:          "n[1-2-2,3]",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+		{
+			// Forbidden range limits
+			input:          "n[2-1]",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+	}
+
+	for _, expandTest := range expandTests {
+		result, err := Expand(expandTest.input)
+
+		hasError := err != nil
+		if hasError != expandTest.errorExpected && hasError {
+			t.Errorf("Expand('%s') failed: unexpected error '%v'",
+				expandTest.input, err)
+			continue
+		}
+		if hasError != expandTest.errorExpected && !hasError {
+			t.Errorf("Expand('%s') did not fail as expected: got result '%+v'",
+				expandTest.input, result)
+			continue
+		}
+		if !hasError && !equal(result, expandTest.resultExpected) {
+			t.Errorf("Expand('%s') failed: got result '%+v', expected result '%v'",
+				expandTest.input, result, expandTest.resultExpected)
+			continue
+		}
+
+		t.Logf("Checked hostlist.Expand('%s'): result = '%+v', err = '%v'",
+			expandTest.input, result, err)
+	}
+}

pkg/multiChanTicker/multiChanTicker.go

@@ -3,7 +3,7 @@ package multiChanTicker
 import (
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 )
 
 type multiChanTicker struct {

receivers.json

@@ -1,25 +1,44 @@
 {
-    "natsrecv" : {
+    "natsrecv": {
         "type": "nats",
         "address": "nats://my-url",
-        "port" : "4222",
+        "port": "4222",
         "database": "testcluster"
     },
     "redfish_recv": {
         "type": "redfish",
+        "endpoint": "https://%h-bmc",
         "client_config": [
             {
-                "hostname": "my-host-1",
+                "host_list": "my-host-1-[1-2]",
                 "username": "username-1",
-                "password": "password-1",
-                "endpoint": "https://my-endpoint-1"
+                "password": "password-1"
+            },
+            {
+                "host_list": "my-host-2-[1,2]",
+                "username": "username-2",
+                "password": "password-2"
+            }
+        ]
+    },
+    "ipmi_recv": {
+        "type": "ipmi",
+        "endpoint": "ipmi-sensors://%h-ipmi",
+        "exclude_metrics": [
+            "fan_speed",
+            "voltage"
+        ],
+        "client_config": [
+            {
+                "username": "username-1",
+                "password": "password-1",
+                "host_list": "my-host-1-[1-2]"
             },
             {
-                "hostname": "my-host-2",
                 "username": "username-2",
                 "password": "password-2",
-                "endpoint": "https://my-endpoint-2"
+                "host_list": "my-host-2-[1,2]"
             }
         ]
     }
-}
+}

receivers/httpReceiver.go

@@ -5,13 +5,13 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"sync"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"github.com/gorilla/mux"
 	influx "github.com/influxdata/line-protocol"
 )
@@ -84,7 +84,7 @@ func (r *HttpReceiver) ServerHttp(w http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	body, err := ioutil.ReadAll(req.Body)
+	body, err := io.ReadAll(req.Body)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return

receivers/ipmiReceiver.go

@@ -0,0 +1,534 @@
+package receivers
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os/exec"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/ClusterCockpit/cc-metric-collector/pkg/hostlist"
+)
+
+type IPMIReceiverClientConfig struct {
+
+	// Hostname the IPMI service belongs to
+	Protocol         string            // Protocol / tool to use for IPMI sensor reading
+	DriverType       string            // Out of band IPMI driver
+	Fanout           int               // Maximum number of simultaneous IPMI connections
+	NumHosts         int               // Number of remote IPMI devices with the same configuration
+	IPMIHosts        string            // List of remote IPMI devices to communicate with
+	IPMI2HostMapping map[string]string // Mapping between IPMI device name and host name
+	Username         string            // User name to authenticate with
+	Password         string            // Password to use for authentication
+	CLIOptions       []string          // Additional command line options for ipmi-sensors
+	isExcluded       map[string]bool   // is metric excluded
+}
+
+type IPMIReceiver struct {
+	receiver
+	config struct {
+		Interval time.Duration
+
+		// Client config for each IPMI hosts
+		ClientConfigs []IPMIReceiverClientConfig
+	}
+
+	// Storage for static information
+	meta map[string]string
+
+	done chan bool      // channel to finish / stop IPMI receiver
+	wg   sync.WaitGroup // wait group for IPMI receiver
+}
+
+// doReadMetrics reads metrics from all configure IPMI hosts.
+func (r *IPMIReceiver) doReadMetric() {
+	for i := range r.config.ClientConfigs {
+		clientConfig := &r.config.ClientConfigs[i]
+		var cmd_options []string
+		if clientConfig.Protocol == "ipmi-sensors" {
+			cmd_options = append(cmd_options,
+				"--always-prefix",
+				"--sdr-cache-recreate",
+				// Attempt to interpret OEM data, such as event data, sensor readings, or general extra info
+				"--interpret-oem-data",
+				// Ignore not-available (i.e. N/A) sensors in output
+				"--ignore-not-available-sensors",
+				// Ignore unrecognized sensor events
+				"--ignore-unrecognized-events",
+				// Output fields in comma separated format
+				"--comma-separated-output",
+				// Do not output column headers
+				"--no-header-output",
+				// Output non-abbreviated units (e.g. 'Amps' instead of 'A').
+				// May aid in disambiguation of units (e.g. 'C' for Celsius or Coulombs).
+				"--non-abbreviated-units",
+				"--fanout", fmt.Sprint(clientConfig.Fanout),
+				"--driver-type", clientConfig.DriverType,
+				"--hostname", clientConfig.IPMIHosts,
+				"--username", clientConfig.Username,
+				"--password", clientConfig.Password,
+			)
+			cmd_options := append(cmd_options, clientConfig.CLIOptions...)
+
+			command := exec.Command("ipmi-sensors", cmd_options...)
+			stdout, _ := command.StdoutPipe()
+			errBuf := new(bytes.Buffer)
+			command.Stderr = errBuf
+
+			// start command
+			if err := command.Start(); err != nil {
+				cclog.ComponentError(
+					r.name,
+					fmt.Sprintf("doReadMetric(): Failed to start command \"%s\": %v", command.String(), err),
+				)
+				continue
+			}
+
+			// Read command output
+			const (
+				idxID = iota
+				idxName
+				idxType
+				idxReading
+				idxUnits
+				idxEvent
+			)
+			numPrefixRegex := regexp.MustCompile("^[[:digit:]][[:digit:]]-(.*)$")
+			scanner := bufio.NewScanner(stdout)
+			for scanner.Scan() {
+				// Read host
+				v1 := strings.Split(scanner.Text(), ": ")
+				if len(v1) != 2 {
+					continue
+				}
+				host, ok := clientConfig.IPMI2HostMapping[v1[0]]
+				if !ok {
+					continue
+				}
+
+				// Read sensors
+				v2 := strings.Split(v1[1], ",")
+				if len(v2) != 6 {
+					continue
+				}
+				// Skip sensors with non available sensor readings
+				if v2[idxReading] == "N/A" {
+					continue
+				}
+
+				metric := strings.ToLower(v2[idxType])
+				name := strings.ToLower(
+					strings.Replace(
+						strings.TrimSpace(
+							v2[idxName]), " ", "_", -1))
+				// remove prefix enumeration like 01-...
+				if v := numPrefixRegex.FindStringSubmatch(name); v != nil {
+					name = v[1]
+				}
+				unit := v2[idxUnits]
+				if unit == "Watts" {
+
+					// Power
+					metric = "power"
+					name = strings.TrimSuffix(name, "_power")
+					name = strings.TrimSuffix(name, "_pwr")
+					name = strings.TrimPrefix(name, "pwr_")
+				} else if metric == "voltage" &&
+					unit == "Volts" {
+
+					// Voltage
+					name = strings.TrimPrefix(name, "volt_")
+				} else if metric == "current" &&
+					unit == "Amps" {
+
+					// Current
+					unit = "Ampere"
+				} else if metric == "temperature" &&
+					unit == "degrees C" {
+
+					// Temperature
+					name = strings.TrimSuffix(name, "_temp")
+					unit = "degC"
+				} else if metric == "temperature" &&
+					unit == "degrees F" {
+
+					// Temperature
+					name = strings.TrimSuffix(name, "_temp")
+					unit = "degF"
+				} else if metric == "fan" && unit == "RPM" {
+
+					// Fan speed
+					metric = "fan_speed"
+					name = strings.TrimSuffix(name, "_tach")
+					name = strings.TrimPrefix(name, "spd_")
+				} else if (metric == "cooling device" ||
+					metric == "other units based sensor") &&
+					name == "system_air_flow" &&
+					unit == "CFM" {
+
+					// Air flow
+					metric = "air_flow"
+					name = strings.TrimSuffix(name, "_air_flow")
+					unit = "CubicFeetPerMinute"
+				} else if (metric == "processor" ||
+					metric == "other units based sensor") &&
+					(name == "cpu_utilization" ||
+						name == "io_utilization" ||
+						name == "mem_utilization" ||
+						name == "sys_utilization") &&
+					(unit == "unspecified" ||
+						unit == "%") {
+
+					// Utilization
+					metric = "utilization"
+					name = strings.TrimSuffix(name, "_utilization")
+					unit = "percent"
+				} else {
+					if false {
+						// Debug output for unprocessed metrics
+						fmt.Printf(
+							"host: '%s', metric: '%s', name: '%s', unit: '%s'\n",
+							host, metric, name, unit)
+					}
+					continue
+				}
+
+				// Skip excluded metrics
+				if clientConfig.isExcluded[metric] {
+					continue
+				}
+
+				// Parse sensor value
+				value, err := strconv.ParseFloat(v2[idxReading], 64)
+				if err != nil {
+					continue
+				}
+
+				y, err := lp.New(
+					metric,
+					map[string]string{
+						"hostname": host,
+						"type":     "node",
+						"name":     name,
+					},
+					map[string]string{
+						"source": r.name,
+						"group":  "IPMI",
+						"unit":   unit,
+					},
+					map[string]interface{}{
+						"value": value,
+					},
+					time.Now())
+				if err == nil {
+					r.sink <- y
+				}
+			}
+
+			// Wait for command end
+			if err := command.Wait(); err != nil {
+				errMsg, _ := io.ReadAll(errBuf)
+				cclog.ComponentError(
+					r.name,
+					fmt.Sprintf("doReadMetric(): Failed to wait for the end of command \"%s\": %v\n",
+						strings.Replace(command.String(), clientConfig.Password, "<PW>", -1), err),
+					fmt.Sprintf("doReadMetric(): command stderr: \"%s\"\n", string(errMsg)),
+				)
+			}
+		}
+	}
+}
+
+func (r *IPMIReceiver) Start() {
+	cclog.ComponentDebug(r.name, "START")
+
+	// Start IPMI receiver
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+
+		// Create ticker
+		ticker := time.NewTicker(r.config.Interval)
+		defer ticker.Stop()
+
+		for {
+			r.doReadMetric()
+
+			select {
+			case tickerTime := <-ticker.C:
+				// Check if we missed the ticker event
+				if since := time.Since(tickerTime); since > 5*time.Second {
+					cclog.ComponentInfo(r.name, "Missed ticker event for more then", since)
+				}
+
+				// process ticker event -> continue
+				continue
+			case <-r.done:
+				// process done event
+				return
+			}
+		}
+	}()
+
+	cclog.ComponentDebug(r.name, "STARTED")
+}
+
+// Close receiver: close network connection, close files, close libraries, ...
+func (r *IPMIReceiver) Close() {
+	cclog.ComponentDebug(r.name, "CLOSE")
+
+	// Send the signal and wait
+	close(r.done)
+	r.wg.Wait()
+
+	cclog.ComponentDebug(r.name, "DONE")
+}
+
+// NewIPMIReceiver creates a new instance of the redfish receiver
+// Initialize the receiver by giving it a name and reading in the config JSON
+func NewIPMIReceiver(name string, config json.RawMessage) (Receiver, error) {
+	r := new(IPMIReceiver)
+
+	// Config options from config file
+	configJSON := struct {
+		Type string `json:"type"`
+
+		// How often the IPMI sensor metrics should be read and send to the sink (default: 30 s)
+		IntervalString string `json:"interval,omitempty"`
+
+		// Maximum number of simultaneous IPMI connections (default: 64)
+		Fanout int `json:"fanout,omitempty"`
+
+		// Out of band IPMI driver (default: LAN_2_0)
+		DriverType string `json:"driver_type,omitempty"`
+
+		// Default client username, password and endpoint
+		Username *string `json:"username"` // User name to authenticate with
+		Password *string `json:"password"` // Password to use for authentication
+		Endpoint *string `json:"endpoint"` // URL of the IPMI device
+
+		// Globally excluded metrics
+		ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
+
+		ClientConfigs []struct {
+			Fanout     int     `json:"fanout,omitempty"`      // Maximum number of simultaneous IPMI connections (default: 64)
+			DriverType string  `json:"driver_type,omitempty"` // Out of band IPMI driver (default: LAN_2_0)
+			HostList   string  `json:"host_list"`             // List of hosts with the same client configuration
+			Username   *string `json:"username"`              // User name to authenticate with
+			Password   *string `json:"password"`              // Password to use for authentication
+			Endpoint   *string `json:"endpoint"`              // URL of the IPMI service
+
+			// Per client excluded metrics
+			ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
+
+			// Additional command line options for ipmi-sensors
+			CLIOptions []string `json:"cli_options,omitempty"`
+		} `json:"client_config"`
+	}{
+		// Set defaults values
+		// Allow overwriting these defaults by reading config JSON
+		Fanout:         64,
+		DriverType:     "LAN_2_0",
+		IntervalString: "30s",
+	}
+
+	// Set name of IPMIReceiver
+	r.name = fmt.Sprintf("IPMIReceiver(%s)", name)
+
+	// Create done channel
+	r.done = make(chan bool)
+
+	// Set static information
+	r.meta = map[string]string{"source": r.name}
+
+	// Read the IPMI receiver specific JSON config
+	if len(config) > 0 {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&configJSON); err != nil {
+			cclog.ComponentError(r.name, "Error reading config:", err.Error())
+			return nil, err
+		}
+	}
+
+	// Convert interval string representation to duration
+	var err error
+	r.config.Interval, err = time.ParseDuration(configJSON.IntervalString)
+	if err != nil {
+		err := fmt.Errorf(
+			"Failed to parse duration string interval='%s': %w",
+			configJSON.IntervalString,
+			err,
+		)
+		cclog.Error(r.name, err)
+		return nil, err
+	}
+
+	// Create client config from JSON config
+	totalNumHosts := 0
+	for i := range configJSON.ClientConfigs {
+		clientConfigJSON := &configJSON.ClientConfigs[i]
+
+		var endpoint string
+		if clientConfigJSON.Endpoint != nil {
+			endpoint = *clientConfigJSON.Endpoint
+		} else if configJSON.Endpoint != nil {
+			endpoint = *configJSON.Endpoint
+		} else {
+			err := fmt.Errorf("client config number %v requires endpoint", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		fanout := configJSON.Fanout
+		if clientConfigJSON.Fanout != 0 {
+			fanout = clientConfigJSON.Fanout
+		}
+
+		driverType := configJSON.DriverType
+		if clientConfigJSON.DriverType != "" {
+			driverType = clientConfigJSON.DriverType
+		}
+		if driverType != "LAN" && driverType != "LAN_2_0" {
+			err := fmt.Errorf("client config number %v has invalid driver type %s", i, driverType)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		var protocol string
+		var host_pattern string
+		if e := strings.Split(endpoint, "://"); len(e) == 2 {
+			protocol = e[0]
+			host_pattern = e[1]
+		} else {
+			err := fmt.Errorf("client config number %v has invalid endpoint %s", i, endpoint)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		var username string
+		if clientConfigJSON.Username != nil {
+			username = *clientConfigJSON.Username
+		} else if configJSON.Username != nil {
+			username = *configJSON.Username
+		} else {
+			err := fmt.Errorf("client config number %v requires username", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		var password string
+		if clientConfigJSON.Password != nil {
+			password = *clientConfigJSON.Password
+		} else if configJSON.Password != nil {
+			password = *configJSON.Password
+		} else {
+			err := fmt.Errorf("client config number %v requires password", i)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+
+		// Create mapping between IPMI host name and node host name
+		// This also guaranties that all IPMI host names are unique
+		ipmi2HostMapping := make(map[string]string)
+		hostList, err := hostlist.Expand(clientConfigJSON.HostList)
+		if err != nil {
+			err := fmt.Errorf("client config number %d failed to parse host list %s: %v",
+				i, clientConfigJSON.HostList, err)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		for _, host := range hostList {
+			ipmiHost := strings.Replace(host_pattern, "%h", host, -1)
+			ipmi2HostMapping[ipmiHost] = host
+		}
+
+		numHosts := len(ipmi2HostMapping)
+		totalNumHosts += numHosts
+		ipmiHostList := make([]string, 0, numHosts)
+		for ipmiHost := range ipmi2HostMapping {
+			ipmiHostList = append(ipmiHostList, ipmiHost)
+		}
+
+		// Additional command line options
+		for _, v := range clientConfigJSON.CLIOptions {
+			switch {
+			case v == "-u" || strings.HasPrefix(v, "--username"):
+				err := fmt.Errorf("client config number %v: do not set username in cli_options. Use json config username instead", i)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			case v == "-p" || strings.HasPrefix(v, "--password"):
+				err := fmt.Errorf("client config number %v: do not set password in cli_options. Use json config password instead", i)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			case v == "-h" || strings.HasPrefix(v, "--hostname"):
+				err := fmt.Errorf("client config number %v: do not set hostname in cli_options. Use json config host_list instead", i)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			case v == "-D" || strings.HasPrefix(v, "--driver-type"):
+				err := fmt.Errorf("client config number %v: do not set driver type in cli_options. Use json config driver_type instead", i)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			case v == "-F" || strings.HasPrefix(v, " --fanout"):
+				err := fmt.Errorf("client config number %v: do not set fanout in cli_options. Use json config fanout instead", i)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			case v == "--always-prefix" ||
+				v == "--sdr-cache-recreate" ||
+				v == "--interpret-oem-data" ||
+				v == "--ignore-not-available-sensors" ||
+				v == "--ignore-unrecognized-events" ||
+				v == "--comma-separated-output" ||
+				v == "--no-header-output" ||
+				v == "--non-abbreviated-units":
+				err := fmt.Errorf("client config number %v: Do not use option %s in cli_options, it is used internally", i, v)
+				cclog.ComponentError(r.name, err)
+				return nil, err
+			}
+		}
+		cliOptions := make([]string, 0)
+		cliOptions = append(cliOptions, clientConfigJSON.CLIOptions...)
+
+		// Is metrics excluded globally or per client
+		isExcluded := make(map[string]bool)
+		for _, key := range clientConfigJSON.ExcludeMetrics {
+			isExcluded[key] = true
+		}
+		for _, key := range configJSON.ExcludeMetrics {
+			isExcluded[key] = true
+		}
+
+		r.config.ClientConfigs = append(
+			r.config.ClientConfigs,
+			IPMIReceiverClientConfig{
+				Protocol:         protocol,
+				Fanout:           fanout,
+				DriverType:       driverType,
+				NumHosts:         numHosts,
+				IPMIHosts:        strings.Join(ipmiHostList, ","),
+				IPMI2HostMapping: ipmi2HostMapping,
+				Username:         username,
+				Password:         password,
+				CLIOptions:       cliOptions,
+				isExcluded:       isExcluded,
+			})
+	}
+
+	if totalNumHosts == 0 {
+		err := fmt.Errorf("at least one IPMI host config is required")
+		cclog.ComponentError(r.name, err)
+		return nil, err
+	}
+
+	cclog.ComponentInfo(r.name, "monitoring", totalNumHosts, "IPMI hosts")
+	return r, nil
+}

receivers/ipmiReceiver.md

@@ -0,0 +1,48 @@
+## IPMI Receiver
+
+The IPMI Receiver uses `ipmi-sensors` from the [FreeIPMI](https://www.gnu.org/software/freeipmi/) project to read IPMI sensor readings and sensor data repository (SDR) information. The available metrics depend on the sensors provided by the hardware vendor but typically contain temperature, fan speed, voltage and power metrics.
+
+### Configuration structure
+
+```json
+{
+    "<IPMI receiver name>": {
+        "type": "ipmi",
+        "interval": "30s",
+        "fanout": 256,
+        "username": "<Username>",
+        "password": "<Password>",
+        "endpoint": "ipmi-sensors://%h-bmc",
+        "exclude_metrics": [ "fan_speed", "voltage" ],
+        "client_config": [
+            {
+                "host_list": "n[1,2-4]"
+            },
+            {
+                "host_list": "n[5-6]",
+                "driver_type": "LAN",
+                "cli_options": [ "--workaround-flags=..." ],
+                "password": "<Password 2>"
+            }
+        ]
+    }
+}
+```
+
+Global settings:
+
+- `interval`: How often the IPMI sensor metrics should be read and send to the sink (default: 30 s)
+
+Global and per IPMI device settings (per IPMI device settings overwrite the global settings):
+
+- `exclude_metrics`: list of excluded metrics e.g. fan_speed, power, temperature, utilization, voltage
+- `fanout`: Maximum number of simultaneous IPMI connections (default: 64)
+- `driver_type`: Out of band IPMI driver (default: LAN_2_0)
+- `username`: User name to authenticate with
+- `password`: Password to use for authentication
+- `endpoint`: URL of the IPMI device (placeholder `%h` gets replaced by the hostname)
+
+Per IPMI device settings:
+
+- `host_list`: List of hosts with the same client configuration
+- `cli_options`: Additional command line options for ipmi-sensors

receivers/metricReceiver.go

@@ -1,7 +1,7 @@
 package receivers
 
 import (
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type defaultReceiverConfig struct {

receivers/natsReceiver.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influx "github.com/influxdata/line-protocol"
 	nats "github.com/nats-io/nats.go"
 )

receivers/prometheusReceiver.go

@@ -12,8 +12,8 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type PrometheusReceiverConfig struct {

receivers/receiveManager.go

@@ -2,14 +2,16 @@ package receivers
 
 import (
 	"encoding/json"
+	"fmt"
 	"os"
 	"sync"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 var AvailableReceivers = map[string]func(name string, config json.RawMessage) (Receiver, error){
+	"ipmi":    NewIPMIReceiver,
 	"nats":    NewNatsReceiver,
 	"redfish": NewRedfishReceiver,
 }
@@ -71,9 +73,13 @@ func (rm *receiveManager) AddInput(name string, rawConfig json.RawMessage) error
 		cclog.ComponentError("ReceiveManager", "SKIP", config.Type, "JSON config error:", err.Error())
 		return err
 	}
+	if config.Type == "" {
+		cclog.ComponentError("ReceiveManager", "SKIP", "JSON config for receiver", name, "does not contain a receiver type")
+		return fmt.Errorf("JSON config for receiver %s does not contain a receiver type", name)
+	}
 	if _, found := AvailableReceivers[config.Type]; !found {
-		cclog.ComponentError("ReceiveManager", "SKIP", config.Type, "unknown receiver:", err.Error())
-		return err
+		cclog.ComponentError("ReceiveManager", "SKIP", "unknown receiver type:", config.Type)
+		return fmt.Errorf("unknown receiver type: %s", config.Type)
 	}
 	r, err := AvailableReceivers[config.Type](name, rawConfig)
 	if err != nil {

receivers/redfishReceiver.md

@@ -0,0 +1,54 @@
+## Redfish receiver
+
+The Redfish receiver uses the [Redfish (specification)](https://www.dmtf.org/standards/redfish) to query thermal and power metrics. Thermal metrics may include various fan speeds and temperatures. Power metrics may include the current power consumption of various hardware components. It may also include the minimum, maximum and average power consumption of these components in a given time interval. The receiver will poll each configured redfish device once in a given interval. Multiple devices can be accessed in parallel to increase throughput.
+
+### Configuration structure
+
+```json
+{
+    "<redfish receiver name>": {
+        "type": "redfish",
+        "username": "<Username>",
+        "password": "<Password>",
+        "endpoint": "https://%h-bmc",
+        "exclude_metrics": [ "min_consumed_watts" ],
+        "client_config": [
+            {
+                "host_list": "n[1,2-4]"
+            },
+            {
+                "host_list": "n5"
+                "disable_power_metrics": true
+            },
+            {
+                "host_list": "n6" ],
+                "username": "<Username 2>",
+                "password": "<Password 2>",
+                "endpoint": "https://%h-BMC",
+                "disable_thermal_metrics": true
+            }
+        ]
+    }
+}
+```
+
+Global settings:
+
+- `fanout`: Maximum number of simultaneous redfish connections (default: 64)
+- `interval`: How often the redfish power metrics should be read and send to the sink (default: 30 s)
+- `http_insecure`: Control whether a client verifies the server's certificate (default: true == do not verify server's certificate)
+- `http_timeout`: Time limit for requests made by this HTTP client (default: 10 s)
+
+Global and per redfish device settings (per redfish device settings overwrite the global settings):
+
+- `disable_power_metrics`: disable collection of power metrics
+- `disable_processor_metrics`: disable collection of processor metrics
+- `disable_thermal_metrics`: disable collection of thermal metrics
+- `exclude_metrics`: list of excluded metrics
+- `username`: User name to authenticate with
+- `password`: Password to use for authentication
+- `endpoint`: URL of the redfish service (placeholder `%h` gets replaced by the hostname)
+
+Per redfish device settings:
+
+- `host_list`: List of hosts with the same client configuration

receivers/sampleReceiver.go

@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 )
 
 // SampleReceiver configuration: receiver type, listen address, port

scripts/cc-metric-collector.config

@@ -6,7 +6,7 @@ CC_HOME=/tmp
 
 LOG_DIR=/var/log
 
-DATA_DIR=/var/lib/grafana
+DATA_DIR=/var/lib/cc-metric-collector
 
 MAX_OPEN_FILES=10000
 

scripts/cc-metric-collector.deb.rules

@@ -0,0 +1,16 @@
+
+#!/usr/bin/make -f
+# You must remove unused comment lines for the released package.
+#export DH_VERBOSE = 1
+#export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+#export DEB_CFLAGS_MAINT_APPEND  = -Wall -pedantic
+#export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
+
+%:
+        dh $@
+
+override_dh_auto_build:
+        make
+
+override_dh_auto_install:
+        make PREFIX=/usr install

scripts/cc-metric-collector.init

@@ -19,7 +19,7 @@
 PATH=/bin:/usr/bin:/sbin:/usr/sbin
 NAME=cc-metric-collector
 DESC="ClusterCockpit metric collector"
-DEFAULT=/etc/default/${NAME}.json
+DEFAULT=/etc/default/${NAME}
 
 CC_USER=clustercockpit
 CC_GROUP=clustercockpit

sinks/README.md

@@ -20,7 +20,9 @@ The configuration file for the sinks is a list of configurations. The `type` fie
 [
   "mystdout" : {
     "type" : "stdout",
-    "meta_as_tags" : false
+    "meta_as_tags" : [
+    	"unit"
+    ]
   },
   "metricstore" : {
     "type" : "http",
@@ -103,4 +105,4 @@ func NewSampleSink(name string, config json.RawMessage) (Sink, error) {
 	return s, err
 }
 
-```
+```

sinks/gangliaCommon.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strings"
 
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 func GangliaMetricName(point lp.CCMetric) string {

sinks/gangliaSink.go

@@ -9,8 +9,8 @@ import (
 	//	"time"
 	"os/exec"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const GMETRIC_EXEC = `gmetric`

sinks/httpSink.go

@@ -9,8 +9,8 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influx "github.com/influxdata/line-protocol"
 )
 

sinks/httpSink.md

@@ -8,7 +8,9 @@ The `http` sink uses POST requests to a HTTP server to submit the metrics in the
 {
   "<name>": {
     "type": "http",
-    "meta_as_tags" : true,
+    "meta_as_tags" : [
+      "meta-key"
+    ],
     "url" : "https://my-monitoring.example.com:1234/api/write",
     "jwt" : "blabla.blabla.blabla",
     "timeout": "5s",
@@ -20,7 +22,7 @@ The `http` sink uses POST requests to a HTTP server to submit the metrics in the
 ```
 
 - `type`: makes the sink an `http` sink
-- `meta_as_tags`: print all meta information as tags in the output (optional)
+- `meta_as_tags`: Move specific meta information to the tags in the output (optional)
 - `url`: The full URL of the endpoint
 - `jwt`: JSON web tokens for authentification (Using the *Bearer* scheme)
 - `timeout`: General timeout for the HTTP client (default '5s')

sinks/influxAsyncSink.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
 	influxdb2ApiHttp "github.com/influxdata/influxdb-client-go/v2/api/http"

sinks/influxSink.go

@@ -9,8 +9,8 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
 	"github.com/influxdata/influxdb-client-go/v2/api/write"
@@ -29,15 +29,23 @@ type InfluxSink struct {
 		Password     string `json:"password,omitempty"`
 		Organization string `json:"organization,omitempty"`
 		SSL          bool   `json:"ssl,omitempty"`
-		// Maximum number of points sent to server in single request. Default 100
+		// Maximum number of points sent to server in single request.
+		// Default: 1000
 		BatchSize int `json:"batch_size,omitempty"`
-		// Interval, in which is buffer flushed if it has not been already written (by reaching batch size). Default 1s
+		// Time interval for delayed sending of metrics.
+		// If the buffers are already filled before the end of this interval,
+		// the metrics are sent without further delay.
+		// Default: 1s
 		FlushInterval string `json:"flush_delay,omitempty"`
+		// Number of metrics that are dropped when buffer is full
+		// Default: 100
+		DropRate int `json:"drop_rate,omitempty"`
 	}
-	batch      []*write.Point
-	flushTimer *time.Timer
-	flushDelay time.Duration
-	lock       sync.Mutex // Flush() runs in another goroutine, so this lock has to protect the buffer
+	batch           []*write.Point
+	flushTimer      *time.Timer
+	flushDelay      time.Duration
+	batchMutex      sync.Mutex // Flush() runs in another goroutine, so this lock has to protect the buffer
+	flushTimerMutex sync.Mutex // Ensure only one flush timer is running
 }
 
 // connect connects to the InfluxDB server
@@ -62,7 +70,10 @@ func (s *InfluxSink) connect() error {
 	} else {
 		auth = fmt.Sprintf("%s:%s", s.config.User, s.config.Password)
 	}
-	cclog.ComponentDebug(s.name, "Using URI", uri, "Org", s.config.Organization, "Bucket", s.config.Database)
+	cclog.ComponentDebug(s.name,
+		"Using URI='"+uri+"'",
+		"Org='"+s.config.Organization+"'",
+		"Bucket='"+s.config.Database+"'")
 
 	// Set influxDB client options
 	clientOptions := influxdb2.DefaultOptions()
@@ -93,47 +104,64 @@ func (s *InfluxSink) connect() error {
 
 func (s *InfluxSink) Write(m lp.CCMetric) error {
 
-	if len(s.batch) == 0 && s.flushDelay != 0 {
-		// This is the first write since the last flush, start the flushTimer!
-		if s.flushTimer != nil && s.flushTimer.Stop() {
-			cclog.ComponentDebug(s.name, "unexpected: the flushTimer was already running?")
-		}
-
-		// Run a batched flush for all lines that have arrived in the last flush delay interval
+	if s.flushDelay != 0 && s.flushTimerMutex.TryLock() {
+		// Run a batched flush for all metrics that arrived in the last flush delay interval
+		cclog.ComponentDebug(s.name, "Starting new flush timer")
 		s.flushTimer = time.AfterFunc(
 			s.flushDelay,
 			func() {
+				defer s.flushTimerMutex.Unlock()
+				cclog.ComponentDebug(s.name, "Starting flush in flush timer")
 				if err := s.Flush(); err != nil {
-					cclog.ComponentError(s.name, "flush failed:", err.Error())
+					cclog.ComponentError(s.name, "Flush timer: flush failed:", err)
 				}
 			})
 	}
 
+	// Lock access to batch slice
+	s.batchMutex.Lock()
+
+	// batch slice full, dropping oldest metric(s)
+	// e.g. when previous flushes failed and batch slice was not cleared
+	if len(s.batch) == s.config.BatchSize {
+		newSize := s.config.BatchSize - s.config.DropRate
+
+		for i := 0; i < newSize; i++ {
+			s.batch[i] = s.batch[i+s.config.DropRate]
+		}
+		for i := newSize; i < s.config.BatchSize; i++ {
+			s.batch[i] = nil
+		}
+		s.batch = s.batch[:newSize]
+		cclog.ComponentError(s.name, "Batch slice full, dropping", s.config.DropRate, "oldest metric(s)")
+	}
+
 	// Append metric to batch slice
 	p := m.ToPoint(s.meta_as_tags)
-	s.lock.Lock()
 	s.batch = append(s.batch, p)
-	s.lock.Unlock()
 
 	// Flush synchronously if "flush_delay" is zero
-	if s.flushDelay == 0 {
-		return s.Flush()
-	}
-
+	// or
 	// Flush if batch size is reached
-	if len(s.batch) == s.config.BatchSize {
+	if s.flushDelay == 0 ||
+		len(s.batch) == s.config.BatchSize {
+		// Unlock access to batch slice
+		s.batchMutex.Unlock()
 		return s.Flush()
 	}
 
+	// Unlock access to batch slice
+	s.batchMutex.Unlock()
 	return nil
 }
 
 // Flush sends all metrics buffered in batch slice to InfluxDB server
 func (s *InfluxSink) Flush() error {
+	cclog.ComponentDebug(s.name, "Flushing")
 
 	// Lock access to batch slice
-	s.lock.Lock()
-	defer s.lock.Unlock()
+	s.batchMutex.Lock()
+	defer s.batchMutex.Unlock()
 
 	// Nothing to do, batch slice is empty
 	if len(s.batch) == 0 {
@@ -143,7 +171,7 @@ func (s *InfluxSink) Flush() error {
 	// Send metrics from batch slice
 	err := s.writeApi.WritePoint(context.Background(), s.batch...)
 	if err != nil {
-		cclog.ComponentError(s.name, "flush failed:", err.Error())
+		cclog.ComponentError(s.name, "Flush(): Flush of", len(s.batch), "metrics failed:", err)
 		return err
 	}
 
@@ -160,6 +188,9 @@ func (s *InfluxSink) Close() {
 	cclog.ComponentDebug(s.name, "Closing InfluxDB connection")
 	s.flushTimer.Stop()
 	s.Flush()
+	if err := s.Flush(); err != nil {
+		cclog.ComponentError(s.name, "Close(): Flush failed:", err)
+	}
 	s.client.Close()
 }
 
@@ -169,31 +200,32 @@ func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
 	s.name = fmt.Sprintf("InfluxSink(%s)", name)
 
 	// Set config default values
-	s.config.BatchSize = 100
+	s.config.BatchSize = 1000
 	s.config.FlushInterval = "1s"
+	s.config.DropRate = 100
 
 	// Read config
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
-			return nil, err
+			return s, err
 		}
 	}
 
 	if len(s.config.Host) == 0 {
-		return nil, errors.New("Missing host configuration required by InfluxSink")
+		return s, errors.New("Missing host configuration required by InfluxSink")
 	}
 	if len(s.config.Port) == 0 {
-		return nil, errors.New("Missing port configuration required by InfluxSink")
+		return s, errors.New("Missing port configuration required by InfluxSink")
 	}
 	if len(s.config.Database) == 0 {
-		return nil, errors.New("Missing database configuration required by InfluxSink")
+		return s, errors.New("Missing database configuration required by InfluxSink")
 	}
 	if len(s.config.Organization) == 0 {
-		return nil, errors.New("Missing organization configuration required by InfluxSink")
+		return s, errors.New("Missing organization configuration required by InfluxSink")
 	}
 	if len(s.config.Password) == 0 {
-		return nil, errors.New("Missing password configuration required by InfluxSink")
+		return s, errors.New("Missing password configuration required by InfluxSink")
 	}
 
 	// Create lookup map to use meta infos as tags in the output metric
@@ -210,12 +242,24 @@ func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
 		}
 	}
 
+	if !(s.config.BatchSize > 0) {
+		return s, fmt.Errorf("batch_size=%d in InfluxDB config must be > 0", s.config.BatchSize)
+	}
+	if !(s.config.DropRate > 0) {
+		return s, fmt.Errorf("drop_rate=%d in InfluxDB config must be > 0", s.config.DropRate)
+	}
+	if !(s.config.BatchSize > s.config.DropRate) {
+		return s, fmt.Errorf(
+			"batch_size=%d must be greater then drop_rate=%d in InfluxDB config",
+			s.config.BatchSize, s.config.DropRate)
+	}
+
 	// allocate batch slice
 	s.batch = make([]*write.Point, 0, s.config.BatchSize)
 
 	// Connect to InfluxDB server
 	if err := s.connect(); err != nil {
-		return nil, fmt.Errorf("unable to connect: %v", err)
+		return s, fmt.Errorf("unable to connect: %v", err)
 	}
 	return s, nil
 }

sinks/libgangliaSink.go

@@ -71,8 +71,8 @@ import (
 	"fmt"
 	"unsafe"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"github.com/NVIDIA/go-nvml/pkg/dl"
 )
 

sinks/metricSink.go

@@ -1,7 +1,7 @@
 package sinks
 
 import (
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type defaultSinkConfig struct {

sinks/natsSink.go

@@ -8,8 +8,8 @@ import (
 	"sync"
 	"time"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influx "github.com/influxdata/line-protocol"
 	nats "github.com/nats-io/nats.go"
 )

sinks/prometheusSink.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 	"sync"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	"github.com/gorilla/mux"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"

sinks/sampleSink.go

@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"log"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type SampleSinkConfig struct {

sinks/sinkManager.go

@@ -6,8 +6,8 @@ import (
 	"os"
 	"sync"
 
-	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 const SINK_MAX_FORWARD = 50
@@ -76,11 +76,17 @@ func (sm *sinkManager) Init(wg *sync.WaitGroup, sinkConfigFile string) error {
 	for name, raw := range rawConfigs {
 		err = sm.AddOutput(name, raw)
 		if err != nil {
-			cclog.ComponentError("SinkManager", err.Error())
+			cclog.ComponentError("SinkManager", err)
 			continue
 		}
 	}
 
+	// Check that at least one sink is running
+	if !(len(sm.sinks) > 0) {
+		cclog.ComponentError("SinkManager", "Found no usable sinks")
+		return fmt.Errorf("Found no usable sinks")
+	}
+
 	return nil
 }
 

sinks/stdoutSink.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 
 	//	"time"
-	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
 
 type StdoutSink struct {