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Metricbeat Helm Chart

This functionality is in beta and is subject to change. The design and code is less mature than official GA features and is being provided as-is with no warranties. Beta features are not subject to the support SLA of official GA features.

This helm chart is a lightweight way to configure and run our official Metricbeat docker image.

Requirements

  • Kubernetes >= 1.8
  • Helm >= 2.8.0

Installing

  • Add the elastic helm charts repo 
    helm repo add elastic https://helm.elastic.co
  • Install it 
    helm install --name metricbeat elastic/metricbeat

Compatibility

This chart is tested with the latest supported versions. The currently tested versions are:

6.x 7.x
6.8.1 7.3.0

Examples of installing older major versions can be found in the examples directory.

While only the latest releases are tested, it is possible to easily install old or new releases by overriding the imageTag. To install version 7.3.0 of metricbeat it would look like this:

helm install --name metricbeat elastic/metricbeat --set imageTag=7.3.0

Configuration

Parameter Description Default
metricbeatConfig Allows you to add any config files in /usr/share/metricbeat such as metricbeat.yml. See values.yaml for an example of the formatting with the default configuration. see values.yaml
extraEnvs Extra environment variables which will be appended to the env: definition for the container []
extraVolumeMounts Templatable string of additional volumeMounts to be passed to the tpl function ""
extraVolumes Templatable string of additional volumes to be passed to the tpl function ""
hostPathRoot Fully-qualified hostPath that will be used to persist Metricbeat registry data /var/lib
image The Metricbeat docker image docker.elastic.co/beats/metricbeat
imageTag The Metricbeat docker image tag 7.3.0
imagePullPolicy The Kubernetes imagePullPolicy value IfNotPresent
imagePullSecrets Configuration for imagePullSecrets so that you can use a private registry for your image []
managedServiceAccount Whether the serviceAccount should be managed by this helm chart. Set this to false in order to manage your own service account and related roles. true
podAnnotations Configurable annotations applied to all Metricbeat pods {}
podSecurityContext Configurable podSecurityContext for Metricbeat pod execution environment runAsUser: 0
privileged: false
livenessProbe Parameters to pass to liveness probe checks for values such as timeouts and thresholds. failureThreshold: 3
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 3
timeoutSeconds: 5
readinessProbe Parameters to pass to readiness probe checks for values such as timeouts and thresholds. failureThreshold: 3
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 3
timeoutSeconds: 5
resources Allows you to set the resources for the DaemonSet requests.cpu: 100m
requests.memory: 100Mi
limits.cpu: 1000m
limits.memory: 200Mi
serviceAccount Custom serviceAccount that Metricbeat will use during execution. By default will use the service account created by this chart. ""
secretMounts Allows you easily mount a secret as a file inside the DaemonSet. Useful for mounting certificates and other secrets. See values.yaml for an example []
terminationGracePeriod Termination period (in seconds) to wait before killing Metricbeat pod process on pod shutdown 30
tolerations Configurable tolerations []
nodeSelector Configurable nodeSelector {}
affinity Configurable affinity {}
updateStrategy The updateStrategy for the DaemonSet. By default Kubernetes will kill and recreate pods on updates. Setting this to OnDelete will require that pods be deleted manually. RollingUpdate
replicas The replica count for the metricbeat deployment talking to kube-state-metrics 1

Examples

In examples/ you will find some example configurations. These examples are used for the automated testing of this helm chart.

Default

  • Deploy the default Elasticsearch helm chart
  • Deploy Metricbeat with the default values 
    cd examples/default
make
  • You can now setup a port forward for Elasticsearch to observe Metricbeat indices 
    kubectl port-forward svc/elasticsearch-master 9200
curl localhost:9200/_cat/indices

Testing

This chart uses pytest to test the templating logic. The dependencies for testing can be installed from the requirements.txt in the parent directory.

pip install -r ../requirements.txt
make pytest

You can also use helm template to look at the YAML being generated

make template

It is possible to run all of the tests and linting inside of a docker container

make test

Integration Testing

Integration tests are run using goss which is a serverspec like tool written in golang. See goss.yaml for an example of what the tests look like.

To run the goss tests against the default example:

cd examples/default
make goss