Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop

This commit is contained in:
Thomas Roehl 2022-03-07 16:13:08 +01:00
commit c5082bbffe
34 changed files with 1311 additions and 474 deletions

64
.github/workflows/AlmaLinux.yml vendored Normal file
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@ -0,0 +1,64 @@
# See: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
# Workflow name
name: AlmaLinux 8.5 RPM build
# Run on tag push
on:
push:
tags:
- '**'
jobs:
#
# Build on AlmaLinux 8.5 using go-toolset
#
AlmaLinux-RPM-build:
runs-on: ubuntu-latest
# See: https://hub.docker.com/_/almalinux
container: almalinux:8.5
steps:
# Use dnf to install development packages
- name: Install development packages
run: dnf --assumeyes group install "Development Tools" "RPM Development Tools"
# 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 dnf to install build dependencies
- name: Install build dependencies
run: dnf --assumeyes builddep scripts/cc-metric-collector.spec
- name: RPM build MetricCollector
id: rpmbuild
run: make RPM
# See: https://github.com/actions/upload-artifact
- name: Save RPM as artifact
uses: actions/upload-artifact@v2
with:
name: cc-metric-collector RPM for AlmaLinux 8.5
path: ${{ steps.rpmbuild.outputs.RPM }}
- name: Save SRPM as artifact
uses: actions/upload-artifact@v2
with:
name: cc-metric-collector SRPM for AlmaLinux 8.5
path: ${{ steps.rpmbuild.outputs.SRPM }}
# See: https://github.com/softprops/action-gh-release
- name: Release
uses: softprops/action-gh-release@v1
if: startsWith(github.ref, 'refs/tags/')
with:
name: cc-metric-collector-${{github.ref_name}}
files: |
${{ steps.rpmbuild.outputs.RPM }}
${{ steps.rpmbuild.outputs.SRPM }}

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@ -0,0 +1,64 @@
# See: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
# Workflow name
name: Red Hat Universal Base Image 8 RPM build
# Run on tag push
on:
push:
tags:
- '**'
jobs:
#
# Build on UBI 8 using go-toolset
#
UBI-8-RPM-build:
runs-on: ubuntu-latest
# See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
container: registry.access.redhat.com/ubi8/ubi:8.5-226.1645809065
steps:
# 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
# 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 dnf to install build dependencies
- name: Install build dependencies
run: dnf --assumeyes --disableplugin=subscription-manager builddep scripts/cc-metric-collector.spec
- name: RPM build MetricCollector
id: rpmbuild
run: make RPM
# See: https://github.com/actions/upload-artifact
- name: Save RPM as artifact
uses: actions/upload-artifact@v2
with:
name: cc-metric-collector RPM for UBI 8
path: ${{ steps.rpmbuild.outputs.RPM }}
- name: Save SRPM as artifact
uses: actions/upload-artifact@v2
with:
name: cc-metric-collector SRPM for UBI 8
path: ${{ steps.rpmbuild.outputs.SRPM }}
# See: https://github.com/softprops/action-gh-release
- name: Release
uses: softprops/action-gh-release@v1
if: startsWith(github.ref, 'refs/tags/')
with:
name: cc-metric-collector-${{github.ref_name}}
files: |
${{ steps.rpmbuild.outputs.RPM }}
${{ steps.rpmbuild.outputs.SRPM }}

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@ -1,58 +0,0 @@
name: Run RPM Build
on:
push:
tags:
- '**'
jobs:
build-alma-8_5:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: TomTheBear/rpmbuild@alma8.5
id: rpm
name: Build RPM package on AlmaLinux 8.5
with:
spec_file: "./scripts/cc-metric-collector.spec"
- name: Save RPM as artifact
uses: actions/upload-artifact@v1.0.0
with:
name: cc-metric-collector RPM AlmaLinux 8.5
path: ${{ steps.rpm.outputs.rpm_path }}
- name: Save SRPM as artifact
uses: actions/upload-artifact@v1.0.0
with:
name: cc-metric-collector SRPM AlmaLinux 8.5
path: ${{ steps.rpm.outputs.source_rpm_path }}
- name: Release
uses: softprops/action-gh-release@v1
with:
name: cc-metric-collector-${{github.ref_name}}
files: |
${{ steps.rpm.outputs.source_rpm_path }}
${{ steps.rpm.outputs.rpm_path }}
build-rhel-ubi8:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: TomTheBear/rpmbuild@rh-ubi8
id: rpm
name: Build RPM package on Red Hat Universal Base Image 8
with:
spec_file: "./scripts/cc-metric-collector.spec"
- name: Save RPM as artifact
uses: actions/upload-artifact@v1.0.0
with:
name: cc-metric-collector RPM Red Hat Universal Base Image 8
path: ${{ steps.rpm.outputs.rpm_path }}
- name: Save SRPM as artifact
uses: actions/upload-artifact@v1.0.0
with:
name: cc-metric-collector SRPM Red Hat Universal Base Image 8
path: ${{ steps.rpm.outputs.source_rpm_path }}
- name: Release
uses: softprops/action-gh-release@v1
with:
files: |
${{ steps.rpm.outputs.source_rpm_path }}
${{ steps.rpm.outputs.rpm_path }}

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@ -1,46 +1,68 @@
# See: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
# Workflow name
name: Run Test
# Run on event push
on: push
jobs:
#
# Job build-1-17
# Build on latest Ubuntu using golang version 1.17
#
build-1-17:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
# 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@v2.1.5
uses: actions/setup-go@v2
with:
go-version: '^1.17.6'
go-version: '^1.17.7'
# Install libganglia
- name: Setup Ganglia
run: sudo apt install ganglia-monitor libganglia1
- name: Build MetricCollector
run: make
- name: Run MetricCollector
- 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:
- uses: actions/checkout@v2
# 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@v2.1.5
uses: actions/setup-go@v2
with:
go-version: '^1.16.7' # The version AlmaLinux 8.5 uses
# Install libganglia
- name: Setup Ganglia
run: sudo apt install ganglia-monitor libganglia1
- name: Build MetricCollector
run: make
- name: Run MetricCollectorlibganglia1
- name: Run MetricCollector once
run: ./cc-metric-collector --once --config .github/ci-config.json

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@ -1,5 +1,5 @@
APP = cc-metric-collector
GOSRC_APP := metric-collector.go
GOSRC_APP := cc-metric-collector.go
GOSRC_COLLECTORS := $(wildcard collectors/*.go)
GOSRC_SINKS := $(wildcard sinks/*.go)
GOSRC_RECEIVERS := $(wildcard receivers/*.go)
@ -56,3 +56,33 @@ vet:
staticcheck:
go install honnef.co/go/tools/cmd/staticcheck@latest
$$(go env GOPATH)/bin/staticcheck ./...
.ONESHELL:
.PHONY: RPM
RPM: scripts/cc-metric-collector.spec
@WORKSPACE="$${PWD}"
@SPECFILE="$${WORKSPACE}/scripts/cc-metric-collector.spec"
# Setup RPM build tree
@eval $$(rpm --eval "ARCH='%{_arch}' RPMDIR='%{_rpmdir}' SOURCEDIR='%{_sourcedir}' SPECDIR='%{_specdir}' SRPMDIR='%{_srcrpmdir}' BUILDDIR='%{_builddir}'")
@mkdir --parents --verbose "$${RPMDIR}" "$${SOURCEDIR}" "$${SPECDIR}" "$${SRPMDIR}" "$${BUILDDIR}"
# Create source tarball
@COMMITISH="HEAD"
@VERS=$$(git describe --tags $${COMMITISH})
@VERS=$${VERS#v}
@VERS=$${VERS//-/_}
@eval $$(rpmspec --query --queryformat "NAME='%{name}' VERSION='%{version}' RELEASE='%{release}' NVR='%{NVR}' NVRA='%{NVRA}'" --define="VERS $${VERS}" "$${SPECFILE}")
@PREFIX="$${NAME}-$${VERSION}"
@FORMAT="tar.gz"
@SRCFILE="$${SOURCEDIR}/$${PREFIX}.$${FORMAT}"
@git archive --verbose --format "$${FORMAT}" --prefix="$${PREFIX}/" --output="$${SRCFILE}" $${COMMITISH}
# Build RPM and SRPM
@rpmbuild -ba --define="VERS $${VERS}" --rmsource --clean "$${SPECFILE}"
# Report RPMs and SRPMs when in GitHub Workflow
@if [[ "$${GITHUB_ACTIONS}" == true ]]; then
@ RPMFILE="$${RPMDIR}/$${ARCH}/$${NVRA}.rpm"
@ SRPMFILE="$${SRPMDIR}/$${NVR}.src.rpm"
@ echo "RPM: $${RPMFILE}"
@ echo "SRPM: $${SRPMFILE}"
@ echo "::set-output name=SRPM::$${SRPMFILE}"
@ echo "::set-output name=RPM::$${RPMFILE}"
@fi

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@ -1,82 +1,25 @@
# Use central installation
CENTRAL_INSTALL = false
# How to access hardware performance counters through LIKWID.
# Recommended is 'direct' mode
ACCESSMODE = direct
#######################################################################
# if CENTRAL_INSTALL == true
#######################################################################
# Path to central installation (if CENTRAL_INSTALL=true)
LIKWID_BASE=/apps/likwid/5.2.1
# LIKWID version (should be same major version as central installation, 5.2.x)
all: likwid
# LIKWID version
LIKWID_VERSION = 5.2.1
#######################################################################
# if CENTRAL_INSTALL == false and ACCESSMODE == accessdaemon
#######################################################################
# Where to install the accessdaemon
DAEMON_INSTALLDIR = /usr/local
# Which user to use for the accessdaemon
DAEMON_USER = root
# Which group to use for the accessdaemon
DAEMON_GROUP = root
.ONESHELL:
.PHONY: likwid
likwid:
INSTALL_FOLDER="$${PWD}/likwid"
BUILD_FOLDER="$${PWD}/likwidbuild"
if [ -d $${INSTALL_FOLDER} ]; then rm -r $${INSTALL_FOLDER}; fi
mkdir --parents --verbose $${INSTALL_FOLDER} $${BUILD_FOLDER}
wget -P "$${BUILD_FOLDER}" ftp://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz
tar -C $${BUILD_FOLDER} -xf $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION).tar.gz
install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/likwid*.h $${INSTALL_FOLDER}/
install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/bstrlib.h $${INSTALL_FOLDER}/
rm -r $${BUILD_FOLDER}
#################################################
# No need to change anything below this line
#################################################
INSTALL_FOLDER = ./likwid
BUILD_FOLDER = ./likwid/build
ifneq ($(strip $(CENTRAL_INSTALL)),true)
LIKWID_BASE := $(shell pwd)/$(INSTALL_FOLDER)
DAEMON_BASE := $(LIKWID_BASE)
GROUPS_BASE := $(LIKWID_BASE)/groups
all: $(INSTALL_FOLDER)/liblikwid.a cleanup
else
DAEMON_BASE= $(LIKWID_BASE)/sbin
all: $(INSTALL_FOLDER)/liblikwid.a cleanup
endif
$(BUILD_FOLDER)/likwid-$(LIKWID_VERSION).tar.gz: $(BUILD_FOLDER)
wget -P $(BUILD_FOLDER) ftp://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz
$(BUILD_FOLDER):
mkdir -p $(BUILD_FOLDER)
$(INSTALL_FOLDER):
mkdir -p $(INSTALL_FOLDER)
$(BUILD_FOLDER)/likwid-$(LIKWID_VERSION): $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION).tar.gz
tar -C $(BUILD_FOLDER) -xf $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION).tar.gz
$(INSTALL_FOLDER)/liblikwid.a: $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION) $(INSTALL_FOLDER)
sed -i -e s+"PREFIX ?= .*"+"PREFIX = $(LIKWID_BASE)"+g \
-e s+"SHARED_LIBRARY = .*"+"SHARED_LIBRARY = false"+g \
-e s+"ACCESSMODE = .*"+"ACCESSMODE = $(ACCESSMODE)"+g \
-e s+"INSTALLED_ACCESSDAEMON = .*"+"INSTALLED_ACCESSDAEMON = $(DAEMON_INSTALLDIR)/likwid-accessD"+g \
$(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/config.mk
cd $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION) && make
cp $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/liblikwid.a $(INSTALL_FOLDER)
cp $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/ext/hwloc/liblikwid-hwloc.a $(INSTALL_FOLDER)
cp $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/src/includes/likwid*.h $(INSTALL_FOLDER)
cp $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/src/includes/bstrlib.h $(INSTALL_FOLDER)
$(DAEMON_INSTALLDIR)/likwid-accessD: $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/likwid-accessD
sudo -u $(DAEMON_USER) -g $(DAEMON_GROUP) install -m 4775 $(BUILD_FOLDER)/likwid-$(LIKWID_VERSION)/likwid-accessD $(DAEMON_INSTALLDIR)/likwid-accessD
prepare_collector: likwidMetric.go
cp likwidMetric.go likwidMetric.go.orig
sed -i -e s+"const GROUPPATH =.*"+"const GROUPPATH = \`$(GROUPS_BASE)\`"+g likwidMetric.go
cleanup:
rm -rf $(BUILD_FOLDER)
clean: cleanup
clean:
rm -rf likwid
.PHONY: clean

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@ -37,6 +37,8 @@ In contrast to the configuration files for sinks and receivers, the collectors c
* [`cpufreq_cpuinfo`](./cpufreqCpuinfoMetric.md)
* [`numastat`](./numastatMetric.md)
* [`gpfs`](./gpfsMetric.md)
* [`beegfs_meta`](./beegfsmetaMetric.md)
* [`beegfs_storage`](./beegfsstorageMetric.md)
## Todos

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@ -0,0 +1,229 @@
package collectors
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"os/user"
"regexp"
"strconv"
"strings"
"time"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
const DEFAULT_BEEGFS_CMD = "beegfs-ctl"
// Struct for the collector-specific JSON config
type BeegfsMetaCollectorConfig struct {
Beegfs string `json:"beegfs_path"`
ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
ExcludeFilesystem []string `json:"exclude_filesystem"`
}
type BeegfsMetaCollector struct {
metricCollector
tags map[string]string
matches map[string]string
config BeegfsMetaCollectorConfig
skipFS map[string]struct{}
}
func (m *BeegfsMetaCollector) Init(config json.RawMessage) error {
// Check if already initialized
if m.init {
return nil
}
// Metrics
var nodeMdstat_array = [39]string{
"sum", "ack", "close", "entInf",
"fndOwn", "mkdir", "create", "rddir",
"refrEn", "mdsInf", "rmdir", "rmLnk",
"mvDirIns", "mvFiIns", "open", "ren",
"sChDrct", "sAttr", "sDirPat", "stat",
"statfs", "trunc", "symlnk", "unlnk",
"lookLI", "statLI", "revalLI", "openLI",
"createLI", "hardlnk", "flckAp", "flckEn",
"flckRg", "dirparent", "listXA", "getXA",
"rmXA", "setXA", "mirror"}
m.name = "BeegfsMetaCollector"
m.setup()
// Set default beegfs-ctl binary
m.config.Beegfs = DEFAULT_BEEGFS_CMD
// Read JSON configuration
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
//create map with possible variables
m.matches = make(map[string]string)
for _, value := range nodeMdstat_array {
_, skip := stringArrayContains(m.config.ExcludeMetrics, value)
if skip {
m.matches["other"] = "0"
} else {
m.matches["beegfs_cmeta_"+value] = "0"
}
}
m.meta = map[string]string{
"source": m.name,
"group": "BeegfsMeta",
}
m.tags = map[string]string{
"type": "node",
"filesystem": "",
}
m.skipFS = make(map[string]struct{})
for _, fs := range m.config.ExcludeFilesystem {
m.skipFS[fs] = struct{}{}
}
// Beegfs file system statistics can only be queried by user root
user, err := user.Current()
if err != nil {
return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to get current user: %v", err)
}
if user.Uid != "0" {
return fmt.Errorf("BeegfsMetaCollector.Init(): BeeGFS file system statistics can only be queried by user root")
}
// Check if beegfs-ctl is in executable search path
_, err = exec.LookPath(m.config.Beegfs)
if err != nil {
return fmt.Errorf("BeegfsMetaCollector.Init(): Failed to find beegfs-ctl binary '%s': %v", m.config.Beegfs, err)
}
m.init = true
return nil
}
func (m *BeegfsMetaCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
//get mounpoint
buffer, _ := ioutil.ReadFile(string("/proc/mounts"))
mounts := strings.Split(string(buffer), "\n")
var mountpoints []string
for _, line := range mounts {
if len(line) == 0 {
continue
}
f := strings.Fields(line)
if strings.Contains(f[0], "beegfs_ondemand") {
// Skip excluded filesystems
if _, skip := m.skipFS[f[1]]; skip {
continue
}
mountpoints = append(mountpoints, f[1])
}
}
if len(mountpoints) == 0 {
return
}
for _, mountpoint := range mountpoints {
m.tags["filesystem"] = mountpoint
// bwwgfs-ctl:
// --clientstats: Show client IO statistics.
// --nodetype=meta: The node type to query (meta, storage).
// --interval:
// --mount=/mnt/beeond/: Which mount point
//cmd := exec.Command(m.config.Beegfs, "/root/mc/test.txt")
mountoption := "--mount=" + mountpoint
cmd := exec.Command(m.config.Beegfs, "--clientstats",
"--nodetype=meta", mountoption, "--allstats")
cmd.Stdin = strings.NewReader("\n")
cmdStdout := new(bytes.Buffer)
cmdStderr := new(bytes.Buffer)
cmd.Stdout = cmdStdout
cmd.Stderr = cmdStderr
err := cmd.Run()
if err != nil {
fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): Failed to execute command \"%s\": %s\n", cmd.String(), err.Error())
fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode())
data, _ := ioutil.ReadAll(cmdStderr)
fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stderr: \"%s\"\n", string(data))
data, _ = ioutil.ReadAll(cmdStdout)
fmt.Fprintf(os.Stderr, "BeegfsMetaCollector.Read(): command stdout: \"%s\"\n", string(data))
return
}
// Read I/O statistics
scanner := bufio.NewScanner(cmdStdout)
sumLine := regexp.MustCompile(`^Sum:\s+\d+\s+\[[a-zA-Z]+\]+`)
//Line := regexp.MustCompile(`^(.*)\s+(\d)+\s+\[([a-zA-Z]+)\]+`)
statsLine := regexp.MustCompile(`^(.*?)\s+?(\d.*?)$`)
singleSpacePattern := regexp.MustCompile(`\s+`)
removePattern := regexp.MustCompile(`[\[|\]]`)
for scanner.Scan() {
readLine := scanner.Text()
//fmt.Println(readLine)
// Jump few lines, we only want the I/O stats from nodes
if !sumLine.MatchString(readLine) {
continue
}
match := statsLine.FindStringSubmatch(readLine)
// nodeName = "Sum:" or would be nodes
// nodeName := match[1]
//Remove multiple whitespaces
dummy := removePattern.ReplaceAllString(match[2], " ")
metaStats := strings.TrimSpace(singleSpacePattern.ReplaceAllString(dummy, " "))
split := strings.Split(metaStats, " ")
// fill map with values
// split[i+1] = mdname
// split[i] = amount of md operations
for i := 0; i <= len(split)-1; i += 2 {
if _, ok := m.matches[split[i+1]]; ok {
m.matches["beegfs_cmeta_"+split[i+1]] = split[i]
} else {
f1, err := strconv.ParseFloat(m.matches["other"], 32)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Metric (other): Failed to convert str written '%s' to float: %v", m.matches["other"], err))
continue
}
f2, err := strconv.ParseFloat(split[i], 32)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Metric (other): Failed to convert str written '%s' to float: %v", m.matches["other"], err))
continue
}
//mdStat["other"] = fmt.Sprintf("%f", f1+f2)
m.matches["beegfs_cstorage_other"] = fmt.Sprintf("%f", f1+f2)
}
}
for key, data := range m.matches {
value, _ := strconv.ParseFloat(data, 32)
y, err := lp.New(key, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
if err == nil {
output <- y
}
}
}
}
}
func (m *BeegfsMetaCollector) Close() {
m.init = false
}

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@ -0,0 +1,75 @@
## `BeeGFS on Demand` collector
This Collector is to collect BeeGFS on Demand (BeeOND) metadata clientstats.
```json
"beegfs_meta": {
"beegfs_path": "/usr/bin/beegfs-ctl",
"exclude_filesystem": [
"/mnt/ignore_me"
],
"exclude_metrics": [
"ack",
"entInf",
"fndOwn"
]
}
```
The `BeeGFS On Demand (BeeOND)` collector uses the `beegfs-ctl` command to read performance metrics for
BeeGFS filesystems.
The reported filesystems can be filtered with the `exclude_filesystem` option
in the configuration.
The path to the `beegfs-ctl` command can be configured with the `beegfs_path` option
in the configuration.
When using the `exclude_metrics` option, the excluded metrics are summed as `other`.
Important: The metrics listed below, are similar to the naming of BeeGFS. The Collector prefixes these with `beegfs_cstorage`(beegfs client storage).
For example beegfs metric `open`-> `beegfs_cstorage_open`
Available Metrics:
* sum
* ack
* close
* entInf
* fndOwn
* mkdir
* create
* rddir
* refrEnt
* mdsInf
* rmdir
* rmLnk
* mvDirIns
* mvFiIns
* open
* ren
* sChDrct
* sAttr
* sDirPat
* stat
* statfs
* trunc
* symlnk
* unlnk
* lookLI
* statLI
* revalLI
* openLI
* createLI
* hardlnk
* flckAp
* flckEn
* flckRg
* dirparent
* listXA
* getXA
* rmXA
* setXA
* mirror
The collector adds a `filesystem` tag to all metrics

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@ -0,0 +1,221 @@
package collectors
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"os/user"
"regexp"
"strconv"
"strings"
"time"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
// Struct for the collector-specific JSON config
type BeegfsStorageCollectorConfig struct {
Beegfs string `json:"beegfs_path"`
ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
ExcludeFilesystem []string `json:"exclude_filesystem"`
}
type BeegfsStorageCollector struct {
metricCollector
tags map[string]string
matches map[string]string
config BeegfsStorageCollectorConfig
skipFS map[string]struct{}
}
func (m *BeegfsStorageCollector) Init(config json.RawMessage) error {
// Check if already initialized
if m.init {
return nil
}
// Metrics
var storageStat_array = [18]string{
"sum", "ack", "sChDrct", "getFSize",
"sAttr", "statfs", "trunc", "close",
"fsync", "ops-rd", "MiB-rd/s", "ops-wr",
"MiB-wr/s", "gendbg", "hrtbeat", "remNode",
"storInf", "unlnk"}
m.name = "BeegfsStorageCollector"
m.setup()
// Set default beegfs-ctl binary
m.config.Beegfs = DEFAULT_BEEGFS_CMD
// Read JSON configuration
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
println(m.config.Beegfs)
//create map with possible variables
m.matches = make(map[string]string)
for _, value := range storageStat_array {
_, skip := stringArrayContains(m.config.ExcludeMetrics, value)
if skip {
m.matches["other"] = "0"
} else {
m.matches["beegfs_cstorage_"+value] = "0"
}
}
m.meta = map[string]string{
"source": m.name,
"group": "BeegfsStorage",
}
m.tags = map[string]string{
"type": "node",
"filesystem": "",
}
m.skipFS = make(map[string]struct{})
for _, fs := range m.config.ExcludeFilesystem {
m.skipFS[fs] = struct{}{}
}
// Beegfs file system statistics can only be queried by user root
user, err := user.Current()
if err != nil {
return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to get current user: %v", err)
}
if user.Uid != "0" {
return fmt.Errorf("BeegfsStorageCollector.Init(): BeeGFS file system statistics can only be queried by user root")
}
// Check if beegfs-ctl is in executable search path
_, err = exec.LookPath(m.config.Beegfs)
if err != nil {
return fmt.Errorf("BeegfsStorageCollector.Init(): Failed to find beegfs-ctl binary '%s': %v", m.config.Beegfs, err)
}
m.init = true
return nil
}
func (m *BeegfsStorageCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
//get mounpoint
buffer, _ := ioutil.ReadFile(string("/proc/mounts"))
mounts := strings.Split(string(buffer), "\n")
var mountpoints []string
for _, line := range mounts {
if len(line) == 0 {
continue
}
f := strings.Fields(line)
if strings.Contains(f[0], "beegfs_ondemand") {
// Skip excluded filesystems
if _, skip := m.skipFS[f[1]]; skip {
continue
}
mountpoints = append(mountpoints, f[1])
}
}
if len(mountpoints) == 0 {
return
}
// collects stats for each BeeGFS on Demand FS
for _, mountpoint := range mountpoints {
m.tags["filesystem"] = mountpoint
// bwwgfs-ctl:
// --clientstats: Show client IO statistics.
// --nodetype=meta: The node type to query (meta, storage).
// --interval:
// --mount=/mnt/beeond/: Which mount point
//cmd := exec.Command(m.config.Beegfs, "/root/mc/test.txt")
mountoption := "--mount=" + mountpoint
cmd := exec.Command(m.config.Beegfs, "--clientstats",
"--nodetype=storage", mountoption, "--allstats")
cmd.Stdin = strings.NewReader("\n")
cmdStdout := new(bytes.Buffer)
cmdStderr := new(bytes.Buffer)
cmd.Stdout = cmdStdout
cmd.Stderr = cmdStderr
err := cmd.Run()
if err != nil {
fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): Failed to execute command \"%s\": %s\n", cmd.String(), err.Error())
fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode())
data, _ := ioutil.ReadAll(cmdStderr)
fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stderr: \"%s\"\n", string(data))
data, _ = ioutil.ReadAll(cmdStdout)
fmt.Fprintf(os.Stderr, "BeegfsStorageCollector.Read(): command stdout: \"%s\"\n", string(data))
return
}
// Read I/O statistics
scanner := bufio.NewScanner(cmdStdout)
sumLine := regexp.MustCompile(`^Sum:\s+\d+\s+\[[a-zA-Z]+\]+`)
//Line := regexp.MustCompile(`^(.*)\s+(\d)+\s+\[([a-zA-Z]+)\]+`)
statsLine := regexp.MustCompile(`^(.*?)\s+?(\d.*?)$`)
singleSpacePattern := regexp.MustCompile(`\s+`)
removePattern := regexp.MustCompile(`[\[|\]]`)
for scanner.Scan() {
readLine := scanner.Text()
//fmt.Println(readLine)
// Jump few lines, we only want the I/O stats from nodes
if !sumLine.MatchString(readLine) {
continue
}
match := statsLine.FindStringSubmatch(readLine)
// nodeName = "Sum:" or would be nodes
// nodeName := match[1]
//Remove multiple whitespaces
dummy := removePattern.ReplaceAllString(match[2], " ")
metaStats := strings.TrimSpace(singleSpacePattern.ReplaceAllString(dummy, " "))
split := strings.Split(metaStats, " ")
// fill map with values
// split[i+1] = mdname
// split[i] = amount of operations
for i := 0; i <= len(split)-1; i += 2 {
if _, ok := m.matches[split[i+1]]; ok {
m.matches["beegfs_cstorage_"+split[i+1]] = split[i]
//m.matches[split[i+1]] = split[i]
} else {
f1, err := strconv.ParseFloat(m.matches["other"], 32)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Metric (other): Failed to convert str written '%s' to float: %v", m.matches["other"], err))
continue
}
f2, err := strconv.ParseFloat(split[i], 32)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Metric (other): Failed to convert str written '%s' to float: %v", m.matches["other"], err))
continue
}
m.matches["beegfs_cstorage_other"] = fmt.Sprintf("%f", f1+f2)
}
}
for key, data := range m.matches {
value, _ := strconv.ParseFloat(data, 32)
y, err := lp.New(key, m.tags, m.meta, map[string]interface{}{"value": value}, time.Now())
if err == nil {
output <- y
}
}
}
}
}
func (m *BeegfsStorageCollector) Close() {
m.init = false
}

View File

@ -0,0 +1,55 @@
## `BeeGFS on Demand` collector
This Collector is to collect BeeGFS on Demand (BeeOND) storage stats.
```json
"beegfs_storage": {
"beegfs_path": "/usr/bin/beegfs-ctl",
"exclude_filesystem": [
"/mnt/ignore_me"
],
"exclude_metrics": [
"ack",
"storInf",
"unlnk"
]
}
```
The `BeeGFS On Demand (BeeOND)` collector uses the `beegfs-ctl` command to read performance metrics for BeeGFS filesystems.
The reported filesystems can be filtered with the `exclude_filesystem` option
in the configuration.
The path to the `beegfs-ctl` command can be configured with the `beegfs_path` option
in the configuration.
When using the `exclude_metrics` option, the excluded metrics are summed as `other`.
Important: The metrics listed below, are similar to the naming of BeeGFS. The Collector prefixes these with `beegfs_cstorage_`(beegfs client meta).
For example beegfs metric `open`-> `beegfs_cstorage_`
Note: BeeGFS FS offers many Metadata Information. Probably it makes sense to exlcude most of them. Nevertheless, these excluded metrics will be summed as `beegfs_cstorage_other`.
Available Metrics:
* "sum"
* "ack"
* "sChDrct"
* "getFSize"
* "sAttr"
* "statfs"
* "trunc"
* "close"
* "fsync"
* "ops-rd"
* "MiB-rd/s"
* "ops-wr"
* "MiB-wr/s"
* "endbg"
* "hrtbeat"
* "remNode"
* "storInf"
* "unlnk"
The collector adds a `filesystem` tag to all metrics

View File

@ -19,7 +19,6 @@ var AvailableCollectors = map[string]MetricCollector{
"memstat": new(MemstatCollector),
"netstat": new(NetstatCollector),
"ibstat": new(InfinibandCollector),
"ibstat_perfquery": new(InfinibandPerfQueryCollector),
"lustrestat": new(LustreCollector),
"cpustat": new(CpustatCollector),
"topprocs": new(TopProcsCollector),
@ -35,6 +34,8 @@ var AvailableCollectors = map[string]MetricCollector{
"nfs3stat": new(Nfs3Collector),
"nfs4stat": new(Nfs4Collector),
"numastats": new(NUMAStatsCollector),
"beegfs_meta": new(BeegfsMetaCollector),
"beegfs_storage": new(BeegfsStorageCollector),
}
// Metric collector manager data structure

View File

@ -17,6 +17,8 @@ import (
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
const DEFAULT_GPFS_CMD = `mmpmon`
type GpfsCollector struct {
metricCollector
tags map[string]string
@ -38,7 +40,7 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
m.setup()
// Set default mmpmon binary
m.config.Mmpmon = "/usr/lpp/mmfs/bin/mmpmon"
m.config.Mmpmon = string(DEFAULT_GPFS_CMD)
// Read JSON configuration
if len(config) > 0 {
@ -64,17 +66,18 @@ func (m *GpfsCollector) Init(config json.RawMessage) error {
// GPFS / IBM Spectrum Scale file system statistics can only be queried by user root
user, err := user.Current()
if err != nil {
return fmt.Errorf("Failed to get current user: %v", err)
return fmt.Errorf("failed to get current user: %v", err)
}
if user.Uid != "0" {
return fmt.Errorf("GPFS file system statistics can only be queried by user root")
}
// Check if mmpmon is in executable search path
_, err = exec.LookPath(m.config.Mmpmon)
p, err := exec.LookPath(m.config.Mmpmon)
if err != nil {
return fmt.Errorf("Failed to find mmpmon binary '%s': %v", m.config.Mmpmon, err)
return fmt.Errorf("failed to find mmpmon binary '%s': %v", m.config.Mmpmon, err)
}
m.config.Mmpmon = p
m.init = true
return nil

View File

@ -16,7 +16,7 @@ The reported filesystems can be filtered with the `exclude_filesystem` option
in the configuration.
The path to the `mmpmon` command can be configured with the `mmpmon_path` option
in the configuration.
in the configuration. If nothing is set, the collector searches in `$PATH` for `mmpmon`.
Metrics:
* `bytes_read`

View File

@ -1,232 +0,0 @@
package collectors
import (
"fmt"
"io/ioutil"
"log"
"os/exec"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
// "os"
"encoding/json"
"errors"
"path/filepath"
"strconv"
"strings"
"time"
)
const PERFQUERY = `/usr/sbin/perfquery`
type InfinibandPerfQueryCollector struct {
metricCollector
tags map[string]string
lids map[string]map[string]string
config struct {
ExcludeDevices []string `json:"exclude_devices,omitempty"`
PerfQueryPath string `json:"perfquery_path"`
}
}
func (m *InfinibandPerfQueryCollector) Init(config json.RawMessage) error {
var err error
m.name = "InfinibandCollectorPerfQuery"
m.setup()
m.meta = map[string]string{"source": m.name, "group": "Network"}
m.tags = map[string]string{"type": "node"}
if len(config) > 0 {
err = json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
if len(m.config.PerfQueryPath) == 0 {
path, err := exec.LookPath("perfquery")
if err == nil {
m.config.PerfQueryPath = path
}
}
m.lids = make(map[string]map[string]string)
p := fmt.Sprintf("%s/*/ports/*/lid", string(IB_BASEPATH))
files, err := filepath.Glob(p)
if err != nil {
return err
}
for _, f := range files {
lid, err := ioutil.ReadFile(f)
if err == nil {
plist := strings.Split(strings.Replace(f, string(IB_BASEPATH), "", -1), "/")
skip := false
for _, d := range m.config.ExcludeDevices {
if d == plist[0] {
skip = true
}
}
if !skip {
m.lids[plist[0]] = make(map[string]string)
m.lids[plist[0]][plist[2]] = string(lid)
}
}
}
for _, ports := range m.lids {
for port, lid := range ports {
args := fmt.Sprintf("-r %s %s 0xf000", lid, port)
command := exec.Command(m.config.PerfQueryPath, args)
command.Wait()
_, err := command.Output()
if err != nil {
return fmt.Errorf("Failed to execute %s: %v", m.config.PerfQueryPath, err)
}
}
}
if len(m.lids) == 0 {
return errors.New("No usable IB devices")
}
m.init = true
return nil
}
func (m *InfinibandPerfQueryCollector) doPerfQuery(cmd string, dev string, lid string, port string, tags map[string]string, output chan lp.CCMetric) error {
args := fmt.Sprintf("-r %s %s 0xf000", lid, port)
command := exec.Command(cmd, args)
command.Wait()
stdout, err := command.Output()
if err != nil {
log.Print(err)
return err
}
ll := strings.Split(string(stdout), "\n")
for _, line := range ll {
if strings.HasPrefix(line, "PortRcvData") || strings.HasPrefix(line, "RcvData") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_recv", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
if strings.HasPrefix(line, "PortXmitData") || strings.HasPrefix(line, "XmtData") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_xmit", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
if strings.HasPrefix(line, "PortRcvPkts") || strings.HasPrefix(line, "RcvPkts") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_recv_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
if strings.HasPrefix(line, "PortXmitPkts") || strings.HasPrefix(line, "XmtPkts") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_xmit_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
if strings.HasPrefix(line, "PortRcvPkts") || strings.HasPrefix(line, "RcvPkts") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_recv_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
if strings.HasPrefix(line, "PortXmitPkts") || strings.HasPrefix(line, "XmtPkts") {
lv := strings.Fields(line)
v, err := strconv.ParseFloat(lv[1], 64)
if err == nil {
y, err := lp.New("ib_xmit_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
}
return nil
}
func (m *InfinibandPerfQueryCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if m.init {
for dev, ports := range m.lids {
for port, lid := range ports {
tags := map[string]string{
"type": "node",
"device": dev,
"port": port,
"lid": lid}
path := fmt.Sprintf("%s/%s/ports/%s/counters/", string(IB_BASEPATH), dev, port)
buffer, err := ioutil.ReadFile(fmt.Sprintf("%s/port_rcv_data", path))
if err == nil {
data := strings.Replace(string(buffer), "\n", "", -1)
v, err := strconv.ParseFloat(data, 64)
if err == nil {
y, err := lp.New("ib_recv", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
buffer, err = ioutil.ReadFile(fmt.Sprintf("%s/port_xmit_data", path))
if err == nil {
data := strings.Replace(string(buffer), "\n", "", -1)
v, err := strconv.ParseFloat(data, 64)
if err == nil {
y, err := lp.New("ib_xmit", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
buffer, err = ioutil.ReadFile(fmt.Sprintf("%s/port_rcv_packets", path))
if err == nil {
data := strings.Replace(string(buffer), "\n", "", -1)
v, err := strconv.ParseFloat(data, 64)
if err == nil {
y, err := lp.New("ib_recv_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
buffer, err = ioutil.ReadFile(fmt.Sprintf("%s/port_xmit_packets", path))
if err == nil {
data := strings.Replace(string(buffer), "\n", "", -1)
v, err := strconv.ParseFloat(data, 64)
if err == nil {
y, err := lp.New("ib_xmit_pkts", tags, m.meta, map[string]interface{}{"value": float64(v)}, time.Now())
if err == nil {
output <- y
}
}
}
}
}
}
}
func (m *InfinibandPerfQueryCollector) Close() {
m.init = false
}

View File

@ -1,28 +0,0 @@
## `ibstat_perfquery` collector
```json
"ibstat_perfquery": {
"perfquery_path": "/path/to/perfquery",
"exclude_devices": [
"mlx4"
]
}
```
The `ibstat_perfquery` collector includes all Infiniband devices that can be
found below `/sys/class/infiniband/` and where any of the ports provides a
LID file (`/sys/class/infiniband/<dev>/ports/<port>/lid`)
The devices can be filtered with the `exclude_devices` option in the configuration.
For each found LID the collector calls the `perfquery` command. The path to the
`perfquery` command can be configured with the `perfquery_path` option in the configuration
Metrics:
* `ib_recv`
* `ib_xmit`
* `ib_recv_pkts`
* `ib_xmit_pkts`
The collector adds a `device` tag to all metrics

View File

@ -2,7 +2,7 @@ package collectors
/*
#cgo CFLAGS: -I./likwid
#cgo LDFLAGS: -L./likwid -llikwid -llikwid-hwloc -lm -Wl,--unresolved-symbols=ignore-in-object-files
#cgo LDFLAGS: -Wl,--unresolved-symbols=ignore-in-object-files
#include <stdlib.h>
#include <likwid.h>
*/
@ -73,6 +73,7 @@ func GetAllMetricScopes() []MetricScope {
const (
LIKWID_LIB_NAME = "liblikwid.so"
LIKWID_LIB_DL_FLAGS = dl.RTLD_LAZY | dl.RTLD_GLOBAL
LIKWID_DEF_ACCESSMODE = "direct"
)
type LikwidCollectorMetricConfig struct {
@ -95,6 +96,8 @@ type LikwidCollectorConfig struct {
Metrics []LikwidCollectorMetricConfig `json:"globalmetrics,omitempty"`
ForceOverwrite bool `json:"force_overwrite,omitempty"`
InvalidToZero bool `json:"invalid_to_zero,omitempty"`
AccessMode string `json:"access_mode,omitempty"`
DaemonPath string `json:"accessdaemon_path,omitempty"`
}
type LikwidCollector struct {
@ -260,6 +263,7 @@ func (m *LikwidCollector) getResponsiblities() map[MetricScope]map[int]int {
func (m *LikwidCollector) Init(config json.RawMessage) error {
var ret C.int
m.name = "LikwidCollector"
m.config.AccessMode = LIKWID_DEF_ACCESSMODE
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
@ -270,6 +274,11 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
if lib == nil {
return fmt.Errorf("error instantiating DynamicLibrary for %s", LIKWID_LIB_NAME)
}
err := lib.Open()
if err != nil {
return fmt.Errorf("error opening %s: %v", LIKWID_LIB_NAME, err)
}
if m.config.ForceOverwrite {
cclog.ComponentDebug(m.name, "Set LIKWID_FORCE=1")
os.Setenv("LIKWID_FORCE", "1")
@ -301,6 +310,16 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
m.initGranularity()
// Generate map for MetricScope -> scope_id (like socket id) -> responsible id (offset in cpulist)
m.scopeRespTids = m.getResponsiblities()
switch m.config.AccessMode {
case "direct":
C.HPMmode(0)
case "accessdaemon":
if len(m.config.DaemonPath) > 0 {
p := os.Getenv("PATH")
os.Setenv("PATH", m.config.DaemonPath+":"+p)
}
C.HPMmode(1)
}
cclog.ComponentDebug(m.name, "initialize LIKWID perfmon module")
ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])

View File

@ -8,6 +8,8 @@ The `likwid` configuration consists of two parts, the "eventsets" and "globalmet
- The global metrics are metrics which require data from all 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. 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. **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.
Additional options:
- `access_mode` : Method to use for hardware performance monitoring (`direct` access as root user, `accessdaemon` for the daemon mode)
- `accessdaemon_path`: Folder with the access daemon `likwid-accessD`, commonly `$LIKWID_INSTALL_LOC/sbin`
- `force_overwrite`: Same as setting `LIKWID_FORCE=1`. In case counters are already in-use, LIKWID overwrites their configuration to do its measurements
- `invalid_to_zero`: In some cases, the calculations result in `NaN` or `Inf`. With this option, all `NaN` and `Inf` values are replaces with `0.0`.
@ -63,6 +65,20 @@ $ scripts/likwid_perfgroup_to_cc_config.py ICX MEM_DP
You can copy this JSON and add it to the `eventsets` list. If you specify multiple event sets, you can add globally derived metrics in the extra `global_metrics` section with the metric names as variables.
### Mixed usage between daemon and users
LIKWID checks the file `/var/run/likwid.lock` before performing any interfering operations. Who is allowed to access the counters is determined by the owner of the file. If it does not exist, it is created for the current user. So, if you want to temporarly allow counter access to a user (e.g. in a job):
Before (SLURM prolog, ...)
```
$ chwon $JOBUSER /var/run/likwid.lock
```
After (SLURM epilog, ...)
```
$ chwon $CCUSER /var/run/likwid.lock
```
### Example configuration

View File

@ -22,6 +22,7 @@ type LustreCollectorConfig struct {
LCtlCommand string `json:"lctl_command"`
ExcludeMetrics []string `json:"exclude_metrics"`
SendAllMetrics bool `json:"send_all_metrics"`
Sudo bool `json:"use_sudo"`
}
type LustreCollector struct {
@ -31,11 +32,17 @@ type LustreCollector struct {
stats map[string]map[string]int64
config LustreCollectorConfig
lctl string
sudoCmd string
}
func (m *LustreCollector) getDeviceDataCommand(device string) []string {
var command *exec.Cmd
statsfile := fmt.Sprintf("llite.%s.stats", device)
command := exec.Command(m.lctl, LCTL_OPTION, statsfile)
if m.config.Sudo {
command = exec.Command(m.sudoCmd, m.lctl, LCTL_OPTION, statsfile)
} else {
command = exec.Command(m.lctl, LCTL_OPTION, statsfile)
}
command.Wait()
stdout, _ := command.Output()
return strings.Split(string(stdout), "\n")
@ -103,15 +110,17 @@ func (m *LustreCollector) Init(config json.RawMessage) error {
"inode_permission": {"lustre_inode_permission": 1}}
// Lustre file system statistics can only be queried by user root
if !m.config.Sudo {
user, err := user.Current()
if err != nil {
cclog.ComponentError(m.name, "Failed to get current user:", err.Error())
return err
}
if user.Uid != "0" {
cclog.ComponentError(m.name, "Lustre file system statistics can only be queried by user root:", err.Error())
cclog.ComponentError(m.name, "Lustre file system statistics can only be queried by user root")
return err
}
}
m.matches = make(map[string]map[string]int)
for lineprefix, names := range defmatches {
@ -136,6 +145,12 @@ func (m *LustreCollector) Init(config json.RawMessage) error {
}
}
m.lctl = p
if m.config.Sudo {
p, err := exec.LookPath("sudo")
if err != nil {
m.sudoCmd = p
}
}
devices := m.getDevices()
if len(devices) == 0 {

View File

@ -13,29 +13,30 @@ import (
)
type MetricCollector interface {
Name() string
Init(config json.RawMessage) error
Initialized() bool
Read(duration time.Duration, output chan lp.CCMetric)
Close()
Name() string // Name of the metric collector
Init(config json.RawMessage) error // Initialize metric collector
Initialized() bool // Is metric collector initialized?
Read(duration time.Duration, output chan lp.CCMetric) // Read metrics from metric collector
Close() // Close / finish metric collector
}
type metricCollector struct {
name string
init bool
meta map[string]string
name string // name of the metric
init bool // is metric collector initialized?
meta map[string]string // static meta data tags
}
// Name() returns the name of the metric collector
// Name returns the name of the metric collector
func (c *metricCollector) Name() string {
return c.name
}
// Setup is for future use
func (c *metricCollector) setup() error {
return nil
}
// Initialized() indicates whether the metric collector has been initialized.
// Initialized indicates whether the metric collector has been initialized
func (c *metricCollector) Initialized() bool {
return c.init
}
@ -64,6 +65,7 @@ func stringArrayContains(array []string, str string) (int, bool) {
return -1, false
}
// SocketList returns the list of physical sockets as read from /proc/cpuinfo
func SocketList() []int {
buffer, err := ioutil.ReadFile("/proc/cpuinfo")
if err != nil {
@ -89,6 +91,7 @@ func SocketList() []int {
return packs
}
// CpuList returns the list of physical CPUs (in contrast to logical CPUs) as read from /proc/cpuinfo
func CpuList() []int {
buffer, err := ioutil.ReadFile("/proc/cpuinfo")
if err != nil {
@ -117,8 +120,8 @@ func CpuList() []int {
// RemoveFromStringList removes the string r from the array of strings s
// If r is not contained in the array an error is returned
func RemoveFromStringList(s []string, r string) ([]string, error) {
for i, item := range s {
if r == item {
for i := range s {
if r == s[i] {
return append(s[:i], s[i+1:]...), nil
}
}

View File

@ -22,6 +22,13 @@ type SampleCollector struct {
tags map[string]string // 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 *SampleCollector) Init(config json.RawMessage) error {
var err error = nil
// Always set the name early in Init() to use it in cclog.Component* functions
@ -56,12 +63,14 @@ func (m *SampleCollector) Init(config json.RawMessage) error {
return err
}
// Read collects all metrics belonging to the sample collector
// and sends them through the output channel to the collector manager
func (m *SampleCollector) Read(interval time.Duration, output chan lp.CCMetric) {
// Create a sample metric
timestamp := time.Now()
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()
@ -75,6 +84,8 @@ func (m *SampleCollector) Read(interval time.Duration, output chan lp.CCMetric)
}
// Close metric collector: close network connection, close files, close libraries, ...
// Called once by the collector manager
func (m *SampleCollector) Close() {
// Unset flag
m.init = false

189
docs/configuration.md Normal file
View File

@ -0,0 +1,189 @@
# Configuring the CC metric collector
The configuration of the CC metric collector consists of five configuration files: one global file and four component related files.
## Global configuration
The global file contains the paths to the other four files and some global options.
```json
{
"sinks": "sinks.json",
"collectors" : "collectors.json",
"receivers" : "receivers.json",
"router" : "router.json",
"interval": 10,
"duration": 1
}
```
Be aware that the paths are relative to the execution folder of the cc-metric-collector binary, so it is recommended to use absolute paths.
## Component configuration
The others are mainly list of of subcomponents: the collectors, the receivers, the router and the sinks. Their role is best shown in a picture:
```mermaid
flowchart LR
subgraph col ["Collectors"]
direction TB
cpustat["cpustat"]
memstat["memstat"]
tempstat["tempstat"]
misc["..."]
end
subgraph Receivers ["Receivers"]
direction TB
nats["NATS"]
httprecv["HTTP"]
miscrecv[...]
end
subgraph calc["Aggregator"]
direction LR
cache["Cache"]
agg["Calculator"]
end
subgraph sinks ["Sinks"]
direction RL
influx["InfluxDB"]
ganglia["Ganglia"]
logger["Logfile"]
miscsink["..."]
end
cpustat --> CollectorManager["CollectorManager"]
memstat --> CollectorManager
tempstat --> CollectorManager
misc --> CollectorManager
nats --> ReceiverManager["ReceiverManager"]
httprecv --> ReceiverManager
miscrecv --> ReceiverManager
CollectorManager --> newrouter["Router"]
ReceiverManager -.-> newrouter
calc -.-> newrouter
newrouter --> SinkManager["SinkManager"]
newrouter -.-> calc
SinkManager --> influx
SinkManager --> ganglia
SinkManager --> logger
SinkManager --> miscsink
```
There are four parts:
- The collectors read data from files, execute commands and call dynamically loaded library function and send it to the router
- The router can process metrics by cacheing and evaluating functions and conditions on them
- The sinks send the metrics to storage backends
- The receivers can be used to receive metrics from other collectors and forward them to the router. They can be used to create a tree-like structure of collectors.
(A maybe better differentiation between collectors and receivers is that the collectors are called periodically while the receivers have their own logic and submit metrics at any time)
### Collectors configuration file
The collectors configuration file tells which metrics should be queried from the system. The metric gathering is logically grouped in so called 'Collectors'. So there are Collectors to read CPU, memory or filesystem statistics. The collectors configuration file is a list of these collectors with collector-specific configurations:
```json
{
"cpustat" : {},
"diskstat": {
"exclude_metrics": [
"disk_total"
]
}
}
```
The first one is the CPU statistics collector without any collector-specific setting. The second one enables disk mount statistics but excludes the metric `disk_total`.
All names and possible collector-specific configuration options can be found [here](../collectors/README.md).
Some collectors might dynamically load shared libraries. In order to enable these collectors, make sure that the shared library path is part of the `LD_LIBRARY_PATH` environment variable.
### Sinks configuration file
The sinks define the output/sending of metrics. The metrics can be forwarded to multiple sinks, even to sinks of the same type. The sinks configuration file is a list of these sinks, each with an individual name.
```json
{
"myinflux" : {
"type" : "influxasync",
"host": "localhost",
"port": "8086",
"organization" : "testorga",
"database" : "testbucket",
"password" : "<my secret JWT>"
},
"companyinflux" : {
"type" : "influxasync",
"host": "companyhost",
"port": "8086",
"organization" : "company",
"database" : "main",
"password" : "<company's secret JWT>"
}
}
```
The above example configuration file defines two sink, both ot type `influxasync`. They are differentiated internally by the names: `myinflux` and `companyinflux`.
All types and possible sink-specific configuration options can be found [here](../sinks/README.md).
Some sinks might dynamically load shared libraries. In order to enable these sinks, make sure that the shared library path is part of the `LD_LIBRARY_PATH` environment variable.
### Router configuration file
The collectors and the sinks are connected through the router. The router forwards the metrics to the sinks but enables some data processing. A common example is to tag all passing metrics like adding `cluster=mycluster`. But also aggregations like "take the average of all 'ipc' metrics" (ipc -> Instructions Per Cycle). Since the configurations of these aggregations can be quite complicated, we refer to the router's [README](../internal/metricRouter/README.md).
A simple router configuration file to start with looks like this:
```json
{
"add_tags" : [
{
"key" : "cluster",
"value" : "mycluster",
"if" : "*"
}
],
"interval_timestamp" : false,
"num_cache_intervals" : 0
}
```
With the `add_tags` section, we tell to attach the `cluster=mycluster` tag to each (`*` metric). The `interval_timestamp` tell the router to not touch the timestamp of metrics. It is possible to send all metrics within an interval with a common time stamp to avoid later alignment issues. The `num_cache_intervals` diables the cache completely. The cache is only required if you want to do complex metric aggregations.
All configuration options can be found [here](../internal/metricRouter/README.md).
### Receivers configuration file
The receivers are a special feature of the CC Metric Collector to enable simpler integration into exising setups. While collectors query data from the local system, the receivers commonly get data from other systems through some network technology like HTTP or NATS. The idea is keep the current setup but send it to a CC Metric Collector which forwards it to the the destination system (if a sink exists for it). For most setups, the receivers are not required and an the receiver config file should contain only an empty JSON map (`{}`).
```json
{
"nats_rack0": {
"type": "nats",
"address" : "nats-server.example.org",
"port" : "4222",
"subject" : "rack0",
},
"nats_rack1": {
"type": "nats",
"address" : "nats-server.example.org",
"port" : "4222",
"subject" : "rack1",
}
}
```
This example configuration creates two receivers with the names `nats_rack0` and `nats_rack1`. While one subscribes to metrics published with the `rack0` subject, the other one subscribes to the `rack0` subject. The NATS server is the same as it manages all subjects in a subnet. (As example, the router could add tags `rack=0` and `rack=1` respectively to the received metrics.)
All types and possible receiver-specific configuration options can be found [here](../receivers/README.md).

View File

@ -9,32 +9,21 @@ The configuration file for the receivers is a list of configurations. The `type`
```json
{
"myreceivername" : {
"type": "receiver-type",
<receiver-specific configuration>
}
}
```
## Type `nats`
This allows to specify
```json
{
"type": "nats",
"address": "<nats-URI or hostname>",
"port" : "<portnumber>",
"subject": "<subscribe topic>"
}
```
## Available receivers
The `nats` receiver subscribes to the topic `database` and listens on `address` and `port` for metrics in the InfluxDB line protocol.
- [`nats`](./natsReceiver.md): Receive metrics from the NATS network
- [`prometheus`](./prometheusReceiver.md): Scrape data from a Prometheus client
- [`http`](./httpReceiver.md): Listen for HTTP Post requests transporting metrics in InfluxDB line protocol
# Contributing own receivers
A receiver contains a few functions and is derived from the type `Receiver` (in `metricReceiver.go`):
* `Start() error`
* `Close()`
* `Name() string`
* `SetSink(sink chan lp.CCMetric)`
* `New<Typename>(name string, config json.RawMessage)`
The data structures should be set up in `Init()` like opening a file or server connection. The `Start()` function should either start a go routine or issue some other asynchronous mechanism for receiving metrics. The `Close()` function should tear down anything created in `Init()`.
Finally, the receiver needs to be registered in the `receiveManager.go`. There is a list of receivers called `AvailableReceivers` which is a map (`receiver_type_string` -> `pointer to NewReceiver function`). Add a new entry with a descriptive name and the new receiver.
For an example, check the [sample receiver](./sampleReceiver.go)

118
receivers/httpReceiver.go Normal file
View File

@ -0,0 +1,118 @@
package receivers
import (
"context"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"strings"
"sync"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
"github.com/gorilla/mux"
influx "github.com/influxdata/line-protocol"
)
const HTTP_RECEIVER_PORT = "8080"
type HttpReceiverConfig struct {
Type string `json:"type"`
Addr string `json:"address"`
Port string `json:"port"`
Path string `json:"path"`
}
type HttpReceiver struct {
receiver
handler *influx.MetricHandler
parser *influx.Parser
meta map[string]string
config HttpReceiverConfig
router *mux.Router
server *http.Server
wg sync.WaitGroup
}
func (r *HttpReceiver) Init(name string, config json.RawMessage) error {
r.name = fmt.Sprintf("HttpReceiver(%s)", name)
r.config.Port = HTTP_RECEIVER_PORT
if len(config) > 0 {
err := json.Unmarshal(config, &r.config)
if err != nil {
cclog.ComponentError(r.name, "Error reading config:", err.Error())
return err
}
}
if len(r.config.Port) == 0 {
return errors.New("not all configuration variables set required by HttpReceiver")
}
r.meta = map[string]string{"source": r.name}
p := r.config.Path
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
uri := fmt.Sprintf("%s:%s%s", r.config.Addr, r.config.Port, p)
cclog.ComponentDebug(r.name, "INIT", uri)
r.handler = influx.NewMetricHandler()
r.parser = influx.NewParser(r.handler)
r.parser.SetTimeFunc(DefaultTime)
r.router = mux.NewRouter()
r.router.Path(p).HandlerFunc(r.ServerHttp)
r.server = &http.Server{Addr: uri, Handler: r.router}
return nil
}
func (r *HttpReceiver) Start() {
cclog.ComponentDebug(r.name, "START")
r.wg.Add(1)
go func() {
err := r.server.ListenAndServe()
if err != nil && err.Error() != "http: Server closed" {
cclog.ComponentError(r.name, err.Error())
}
r.wg.Done()
}()
}
func (r *HttpReceiver) ServerHttp(w http.ResponseWriter, req *http.Request) {
if req.Method != http.MethodPost {
http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
return
}
body, err := ioutil.ReadAll(req.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
metrics, err := r.parser.Parse(body)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
}
for _, m := range metrics {
y := lp.FromInfluxMetric(m)
for k, v := range r.meta {
y.AddMeta(k, v)
}
if r.sink != nil {
r.sink <- y
}
}
w.WriteHeader(http.StatusOK)
}
func (r *HttpReceiver) Close() {
r.server.Shutdown(context.Background())
}
func NewHttpReceiver(name string, config json.RawMessage) (Receiver, error) {
r := new(HttpReceiver)
err := r.Init(name, config)
return r, err
}

23
receivers/httpReceiver.md Normal file
View File

@ -0,0 +1,23 @@
## `http` receiver
The `http` receiver can be used receive metrics through HTTP POST requests.
### Configuration structure
```json
{
"<name>": {
"type": "http",
"address" : "",
"port" : "8080",
"path" : "/write"
}
}
```
- `type`: makes the receiver a `http` receiver
- `address`: Listen address
- `port`: Listen port
- `path`: URL path for the write endpoint
The HTTP endpoint listens to `http://<address>:<port>/<path>`

View File

@ -8,6 +8,7 @@ type defaultReceiverConfig struct {
Type string `json:"type"`
}
// Receiver configuration: Listen address, port
type ReceiverConfig struct {
Addr string `json:"address"`
Port string `json:"port"`
@ -23,15 +24,17 @@ type receiver struct {
type Receiver interface {
Start()
Close()
Name() string
SetSink(sink chan lp.CCMetric)
Close() // Close / finish metric receiver
Name() string // Name of the metric receiver
SetSink(sink chan lp.CCMetric) // Set sink channel
}
// Name returns the name of the metric receiver
func (r *receiver) Name() string {
return r.name
}
// SetSink set the sink channel
func (r *receiver) SetSink(sink chan lp.CCMetric) {
r.sink = sink
}

21
receivers/natsReceiver.md Normal file
View File

@ -0,0 +1,21 @@
## `nats` receiver
The `nats` receiver can be used receive metrics from the NATS network. The `nats` receiver subscribes to the topic `database` and listens on `address` and `port` for metrics in the InfluxDB line protocol.
### Configuration structure
```json
{
"<name>": {
"type": "nats",
"address" : "nats-server.example.org",
"port" : "4222",
"subject" : "subject"
}
}
```
- `type`: makes the receiver a `nats` receiver
- `address`: Address of the NATS control server
- `port`: Port of the NATS control server
- `subject`: Subscribes to this subject and receive metrics

View File

@ -10,7 +10,7 @@ The `prometheus` receiver can be used to scrape the metrics of a single `prometh
"type": "prometheus",
"address" : "testpromhost",
"port" : "12345",
"port" : "/prometheus",
"path" : "/prometheus",
"interval": "5s",
"ssl" : true,
}

View File

@ -7,6 +7,7 @@ import (
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
)
// SampleReceiver configuration: receiver type, listen address, port
type SampleReceiverConfig struct {
Type string `json:"type"`
Addr string `json:"address"`
@ -24,6 +25,10 @@ type SampleReceiver struct {
// wg sync.WaitGroup
}
// Implement functions required for Receiver interface
// Start(), Close()
// See: metricReceiver.go
func (r *SampleReceiver) Start() {
cclog.ComponentDebug(r.name, "START")
@ -44,6 +49,7 @@ func (r *SampleReceiver) Start() {
// }()
}
// Close receiver: close network connection, close files, close libraries, ...
func (r *SampleReceiver) Close() {
cclog.ComponentDebug(r.name, "CLOSE")
@ -54,13 +60,21 @@ func (r *SampleReceiver) Close() {
// r.wg.Wait()
}
// New function to create a new instance of the receiver
// Initialize the receiver by giving it a name and reading in the config JSON
func NewSampleReceiver(name string, config json.RawMessage) (Receiver, error) {
r := new(SampleReceiver)
r.name = fmt.Sprintf("HttpReceiver(%s)", name)
// Set name of SampleReceiver
// The name should be chosen in such a way that different instances of SampleReceiver can be distinguished
r.name = fmt.Sprintf("SampleReceiver(%s)", name)
// Set static information
r.meta = map[string]string{"source": r.name}
// Set defaults in r.config
// Allow overwriting these defaults by reading config JSON
// Read the sample receiver specific JSON config
if len(config) > 0 {
err := json.Unmarshal(config, &r.config)

View File

@ -1,5 +1,5 @@
Name: cc-metric-collector
Version: 0.2
Version: %{VERS}
Release: 1%{?dist}
Summary: Metric collection daemon from the ClusterCockpit suite
@ -7,8 +7,9 @@ License: MIT
Source0: %{name}-%{version}.tar.gz
BuildRequires: go-toolset
# for internal LIKWID installation
BuildRequires: wget perl-Data-Dumper
BuildRequires: systemd-rpm-macros
# for header downloads
BuildRequires: wget
Provides: %{name} = %{version}
@ -34,11 +35,15 @@ install -Dpm 0600 receivers.json %{buildroot}%{_sysconfdir}/%{name}/receivers.js
install -Dpm 0600 router.json %{buildroot}%{_sysconfdir}/%{name}/router.json
install -Dpm 0644 scripts/%{name}.service %{buildroot}%{_unitdir}/%{name}.service
install -Dpm 0600 scripts/%{name}.config %{buildroot}%{_sysconfdir}/default/%{name}
install -Dpm 0644 scripts/%{name}.sysusers %{buildroot}%{_sysusersdir}/%{name}.conf
%check
# go test should be here... :)
%pre
%sysusers_create_package scripts/%{name}.sysusers
%post
%systemd_post %{name}.service
@ -46,17 +51,23 @@ install -Dpm 0600 scripts/%{name}.config %{buildroot}%{_sysconfdir}/default/%{na
%systemd_preun %{name}.service
%files
# Binary
%attr(-,clustercockpit,clustercockpit) %{_sbindir}/%{name}
# Config
%dir %{_sysconfdir}/%{name}
%{_sbindir}/%{name}
%attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/%{name}.json
%attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/collectors.json
%attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/sinks.json
%attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/receivers.json
%attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/router.json
# Systemd
%{_unitdir}/%{name}.service
%{_sysconfdir}/default/%{name}
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/%{name}/%{name}.json
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/%{name}/collectors.json
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/%{name}/sinks.json
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/%{name}/receivers.json
%attr(0600,root,root) %config(noreplace) %{_sysconfdir}/%{name}/router.json
%{_sysusersdir}/%{name}.conf
%changelog
* Thu Mar 03 2022 Thomas Gruber - 0.3
- Add clustercockpit user installation
* Mon Feb 14 2022 Thomas Gruber - 0.2
- Add component specific configuration files
- Add %attr to config files

View File

@ -0,0 +1,2 @@
#Type Name ID GECOS Home directory Shell
u clustercockpit - "User for ClusterCockpit" /run/cc-metric-collector /sbin/nologin

View File

@ -10,17 +10,18 @@ type defaultSinkConfig struct {
}
type sink struct {
meta_as_tags bool
name string
meta_as_tags bool // Use meta data tags as tags
name string // Name of the sink
}
type Sink interface {
Write(point lp.CCMetric) error
Flush() error
Close()
Name() string
Write(point lp.CCMetric) error // Write metric to the sink
Flush() error // Flush buffered metrics
Close() // Close / finish metric sink
Name() string // Name of the metric sink
}
// Name returns the name of the metric sink
func (s *sink) Name() string {
return s.name
}

View File

@ -10,15 +10,22 @@ import (
)
type SampleSinkConfig struct {
defaultSinkConfig // defines JSON tags for 'type' and 'meta_as_tags'
// Add additional options
// defines JSON tags for 'type' and 'meta_as_tags'
// See: metricSink.go
defaultSinkConfig
// Additional config options, for SampleSink
}
type SampleSink struct {
sink // declarate 'name' and 'meta_as_tags'
// declares elements 'name' and 'meta_as_tags'
sink
config SampleSinkConfig // entry point to the SampleSinkConfig
}
// Implement functions required for Sink interface
// Write(...), Flush(), Close()
// See: metricSink.go
// Code to submit a single CCMetric to the sink
func (s *SampleSink) Write(point lp.CCMetric) error {
log.Print(point)
@ -39,9 +46,13 @@ func (s *SampleSink) Close() {
// Initialize the sink by giving it a name and reading in the config JSON
func NewSampleSink(name string, config json.RawMessage) (Sink, error) {
s := new(SampleSink)
// Set name of sampleSink
// The name should be chosen in such a way that different instances of SampleSink can be distinguished
s.name = fmt.Sprintf("SampleSink(%s)", name) // Always specify a name here
// Set defaults in s.config
// Allow overwriting these defaults by reading config JSON
// Read in the config JSON
if len(config) > 0 {
@ -52,7 +63,7 @@ func NewSampleSink(name string, config json.RawMessage) (Sink, error) {
}
// Check if all required fields in the config are set
// Use 'len(s.config.Option) > 0' for string settings
// E.g. use 'len(s.config.Option) > 0' for string settings
// Establish connection to the server, library, ...
// Check required files exist and lookup path(s) of executable(s)