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Metricbeat Helm Chart

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This Helm chart is a lightweight way to configure and run our official Metricbeat Docker image.

Warning When it comes to running the Elastic on Kubernetes infrastructure, we recommend Elastic Cloud on Kubernetes (ECK) as the best way to run and manage the Elastic Stack.

ECK offers many operational benefits for both our basic-tier and our enterprise-tier customers, such as spinning up cluster nodes that were lost on failed infrastructure, seamless upgrades, rolling cluster changes, and much much more.

With the release of the Elastic Stack Helm charts for Elastic version 8.5.1, we are handing over the ongoing maintenance of our Elastic Stack Helm charts to the community and contributors. This repository will finally be archived after 6 months time. Elastic Stacks deployed on Kubernetes through Helm charts will still be fully supported under EOL limitations.

Since we want to provide an even better experience for our customers by running the Elastic Stack on Kubernetes, we will continue maintaining the Helm charts applicable to ECK Custom Resources. These charts can be found in the ECK repository.

Helm charts will currently be maintained for ECK Enterprise-tier customers, however, we encourage the community to engage with the existing Helm charts for the Elastic Stack and continue supporting their ongoing maintenance.

See elastic#1731 for more details.

Requirements

See supported configurations for more details.

Installing

Install a released version using the Helm repository

  • Add the Elastic Helm charts repo: helm repo add elastic https://helm.elastic.co

  • Add the Prometheus community Helm charts repo (required for kube-state-metrics chart dependency): helm repo add prometheus-community https://prometheus-community.github.io/helm-charts

  • Install it: helm install metricbeat elastic/metricbeat

Install development version using main branch

  • Clone the git repo: git clone git@github.com:elastic/helm-charts.git

  • Add the Prometheus community Helm charts repo (required for kube-state-metrics chart dependency): helm repo add prometheus-community https://prometheus-community.github.io/helm-charts

  • Install it: helm install metricbeat ./helm-charts/metricbeat --set imageTag=8.5.1

Upgrading

Please always check CHANGELOG.md and BREAKING_CHANGES.md before upgrading to a new chart version.

Usage notes

  • The default Metricbeat configuration file for this chart is configured to use an Elasticsearch endpoint. Without any additional changes, Metricbeat will send documents to the service URL that the Elasticsearch Helm chart sets up by default. The Elasticsearch credentials are also retrieved from elasticsearch-master-credentials Secret from Elasticsearch chart by default. You may either set the ELASTICSEARCH_HOSTS, ELASTICSEARCH_USER and ELASTICSEARCH_PASSWORD environment variables in extraEnvs to override this or modify the default metricbeatConfig to change this behavior.
  • This chart disables the HostNetwork setting by default for compatibility reasons with the majority of kubernetes providers and scenarios. Some kubernetes providers may not allow enabling hostNetwork and deploying multiple Metricbeat pods on the same node isn't possible with hostNetwork However Metricbeat does recommend activating it. If your kubernetes provider is compatible with hostNetwork and you don't need to run multiple Metricbeat DaemonSets, you can activate it by setting hostNetworking: true in values.yaml.
  • This repo includes several examples of configurations that can be used as a reference. They are also used in the automated testing of this chart.

Configuration

Parameter Description Default
clusterRoleRules Configurable cluster role rules that Metricbeat uses to access Kubernetes resources see values.yaml
daemonset.annotations Configurable annotations for Metricbeat daemonset {}
daemonset.labels Configurable labels applied to all Metricbeat DaemonSet pods {}
daemonset.affinity Configurable affinity for Metricbeat daemonset {}
daemonset.enabled If true, enable daemonset true
daemonset.envFrom Templatable string of envFrom to be passed to the environment from variables which will be appended to Metricbeat container for DaemonSet []
daemonset.extraEnvs Extra environment variables which will be appended to Metricbeat container for DaemonSet see values.yaml
daemonset.extraVolumeMounts Templatable string of additional volumeMounts to be passed to the tpl function or DaemonSet []
daemonset.extraVolumes Templatable string of additional volumes to be passed to the tpl function or DaemonSet []
daemonset.hostAliases Configurable hostAliases for Metricbeat DaemonSet []
daemonset.hostNetworking Enable Metricbeat DaemonSet to use hostNetwork false
daemonset.metricbeatConfig Allows you to add any config files in /usr/share/metricbeat such as metricbeat.yml for Metricbeat DaemonSet see values.yaml
daemonset.nodeSelector Configurable nodeSelector for Metricbeat DaemonSet {}
daemonset.resources Allows you to set the resources for Metricbeat DaemonSet see values.yaml
daemonset.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 []
daemonset.securityContext Configurable securityContext for Metricbeat DaemonSet pod execution environment see values.yaml
daemonset.tolerations Configurable tolerations for Metricbeat DaemonSet []
deployment.annotations Configurable annotations for Metricbeat Deployment {}
deployment.labels Configurable labels applied to all Metricbeat Deployment pods {}
deployment.affinity Configurable affinity for Metricbeat Deployment {}
deployment.enabled If true, enable deployment true
deployment.envFrom Templatable string of envFrom to be passed to the environment from variables which will be appended to Metricbeat container for Deployment []
deployment.extraEnvs Extra environment variables which will be appended to Metricbeat container for Deployment see values.yaml
deployment.extraVolumeMounts Templatable string of additional volumeMounts to be passed to the tpl function or DaemonSet []
deployment.extraVolumes Templatable string of additional volumes to be passed to the tpl function or Deployment []
deployment.hostAliases Configurable hostAliases for Metricbeat Deployment []
deployment.metricbeatConfig Allows you to add any config files in /usr/share/metricbeat such as metricbeat.yml for Metricbeat Deployment see values.yaml
deployment.nodeSelector Configurable nodeSelector for Metricbeat Deployment {}
deployment.resources Allows you to set the resources for Metricbeat Deployment see values.yaml
deployment.secretMounts Allows you easily mount a secret as a file inside the Deployment Useful for mounting certificates and other secrets. See values.yaml for an example []
deployment.securityContext Configurable securityContext for Metricbeat Deployment pod execution environment see values.yaml
deployment.tolerations Configurable tolerations for Metricbeat Deployment []
extraContainers Templatable string of additional containers to be passed to the tpl function ""
extraInitContainers Templatable string of additional containers to be passed to the tpl function ""
fullnameOverride Overrides the full name of the resources. If not set the name will default to " .Release.Name - .Values.nameOverride or .Chart.Name " ""
hostPathRoot Fully-qualified hostPath that will be used to persist Metricbeat registry data /var/lib
imagePullPolicy The Kubernetes imagePullPolicy value IfNotPresent
imagePullSecrets Configuration for imagePullSecrets so that you can use a private registry for your image []
imageTag The Metricbeat Docker image tag 8.5.1
image The Metricbeat Docker image docker.elastic.co/beats/metricbeat
kube_state_metrics.enabled Install kube-state-metrics chart as a dependency true
kube_state_metrics.host Define kube-state-metrics endpoint for an existing deployment. Works only if kube_state_metrics.enabled: false ""
livenessProbe Parameters to pass to liveness probe checks for values such as timeouts and thresholds see values.yaml
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
nameOverride Overrides the chart name for resources. If not set the name will default to .Chart.Name ""
podAnnotations Configurable annotations applied to all Metricbeat pods {}
priorityClassName The name of the PriorityClass. No default is supplied as the PriorityClass must be created first ""
readinessProbe Parameters to pass to readiness probe checks for values such as timeouts and thresholds see values.yaml
replicas The replica count for the Metricbeat deployment talking to kube-state-metrics 1
secrets Allows creating a secret from variables or a file. To add secrets from file, add suffix .filepath to the key of the secret key. The value will be encoded to base64. See values.yaml
serviceAccount Custom serviceAccount that Metricbeat will use during execution. By default will use the service account created by this chart ""
serviceAccountAnnotations Annotations to be added to the ServiceAccount that is created by this chart. {}
terminationGracePeriod Termination period (in seconds) to wait before killing Metricbeat pod process on pod shutdown 30
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

FAQ

How to use Metricbeat with Elasticsearch with security (authentication and TLS) enabled?

This Helm chart can use existing Kubernetes secrets to setup credentials or certificates for examples. These secrets should be created outside of this chart and accessed using environment variables and volumes.

An example can be found in examples/security.

How to install OSS version of Metricbeat?

Deploying OSS version of Metricbeat can be done by setting image value to Metricbeat OSS Docker image

An example of Metricbeat deployment using OSS version can be found in examples/oss.

How to use Kubelet read-only port instead of secure port?

Default Metricbeat configuration has been switched to Kubelet secure port (10250/TCP) instead of read-only port (10255/TCP) in #471 because read-only port usage is now discouraged and not enabled by default in most Kubernetes configurations.

However, if you need to use read-only port, you can replace hosts: ["https://${NODE_NAME}:10250"] by hosts: ["${NODE_NAME}:10255"] and comment bearer_token_file and ssl.verification_mode in daemonset.metricbeatConfig in values.yaml.

Why is Metricbeat host.name field set to Kubernetes pod name?

The default Metricbeat configuration is using Metricbeat pod name for agent.hostname and host.name fields. The hostname of the Kubernetes nodes can be find in kubernetes.node.name field. If you would like to have agent.hostname and host.name fields set to the hostname of the nodes, you'll need to set daemonset.hostNetworking value to true.

Note that enabling hostNetwork make Metricbeat pod use the host network namespace which gives it access to the host loopback device, services listening on localhost, could be used to snoop on network activity of other pods on the same node.

How do I get multiple beats agents working with hostNetworking enabled?

The default http port for multiple beats agents may be on the same port, for example, Filebeats and Metricbeats both default to 5066. When hostNetworking is enabled this will cause collisions when standing up the http server. The work around for this is to set http.port in the config file for one of the beats agent to use a different port.

Contributing

Please check CONTRIBUTING.md before any contribution or for any questions about our development and testing process.