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# Elasticsearch Helm Chart [](https://devops-ci.elastic.co/job/elastic+helm-charts+master/) [](https://artifacthub.io/packages/search?repo=elastic) This Helm chart is a lightweight way to configure and run our official [Elasticsearch Docker image][]. <!-- development warning placeholder --> <!-- START doctoc generated TOC please keep comment here to allow auto update --> <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE --> - [Requirements](#requirements) - [Installing](#installing) - [Install released version using Helm repository](#install-released-version-using-helm-repository) - [Install development version from a branch](#install-development-version-from-a-branch) - [Upgrading](#upgrading) - [Usage notes](#usage-notes) - [Configuration](#configuration) - [Deprecated](#deprecated) - [FAQ](#faq) - [How to deploy this chart on a specific K8S distribution?](#how-to-deploy-this-chart-on-a-specific-k8s-distribution) - [How to deploy dedicated nodes types?](#how-to-deploy-dedicated-nodes-types) - [Clustering and Node Discovery](#clustering-and-node-discovery) - [How to deploy clusters with security (authentication and TLS) enabled?](#how-to-deploy-clusters-with-security-authentication-and-tls-enabled) - [How to migrate from helm/charts stable chart?](#how-to-migrate-from-helmcharts-stable-chart) - [How to install plugins?](#how-to-install-plugins) - [How to use the keystore?](#how-to-use-the-keystore) - [Basic example](#basic-example) - [Multiple keys](#multiple-keys) - [Custom paths and keys](#custom-paths-and-keys) - [How to enable snapshotting?](#how-to-enable-snapshotting) - [How to configure templates post-deployment?](#how-to-configure-templates-post-deployment) - [Contributing](#contributing) <!-- END doctoc generated TOC please keep comment here to allow auto update --> <!-- Use this to update TOC: --> <!-- docker run --rm -it -v $(pwd):/usr/src jorgeandrada/doctoc --github --> ## Requirements * Kubernetes >= 1.14 * [Helm][] >= 2.17.0 * Minimum cluster requirements include the following to run this chart with default settings. All of these settings are configurable. * Three Kubernetes nodes to respect the default "hard" affinity settings * 1GB of RAM for the JVM heap See [supported configurations][] for more details. ## Installing This chart is tested with the latest 7.17.3 version. ### Install released version using Helm repository * Add the Elastic Helm charts repo: `helm repo add elastic https://helm.elastic.co` * Install it: - with Helm 3: `helm install elasticsearch --version <version> elastic/elasticsearch` - with Helm 2 (deprecated): `helm install --name elasticsearch --version <version> elastic/elasticsearch` ### Install development version from a branch * Clone the git repo: `git clone git@github.com:elastic/helm-charts.git` * Checkout the branch : `git checkout 7.17` * Install it: - with Helm 3: `helm install elasticsearch ./helm-charts/elasticsearch --set imageTag=7.17.3` - with Helm 2 (deprecated): `helm install --name elasticsearch ./helm-charts/elasticsearch --set imageTag=7.17.3` ## Upgrading Please always check [CHANGELOG.md][] and [BREAKING_CHANGES.md][] before upgrading to a new chart version. ## Usage notes * This repo includes a number of [examples][] configurations which can be used as a reference. They are also used in the automated testing of this chart. * Automated testing of this chart is currently only run against GKE (Google Kubernetes Engine). * The chart deploys a StatefulSet and by default will do an automated rolling update of your cluster. It does this by waiting for the cluster health to become green after each instance is updated. If you prefer to update manually you can set `OnDelete` [updateStrategy][]. * It is important to verify that the JVM heap size in `esJavaOpts` and to set the CPU/Memory `resources` to something suitable for your cluster. * To simplify chart and maintenance each set of node groups is deployed as a separate Helm release. Take a look at the [multi][] example to get an idea for how this works. Without doing this it isn't possible to resize persistent volumes in a StatefulSet. By setting it up this way it makes it possible to add more nodes with a new storage size then drain the old ones. It also solves the problem of allowing the user to determine which node groups to update first when doing upgrades or changes. * We have designed this chart to be very un-opinionated about how to configure Elasticsearch. It exposes ways to set environment variables and mount secrets inside of the container. Doing this makes it much easier for this chart to support multiple versions with minimal changes. ## Configuration | Parameter | Description | Default | |------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------| | `antiAffinityTopologyKey` | The [anti-affinity][] topology key. By default this will prevent multiple Elasticsearch nodes from running on the same Kubernetes node | `kubernetes.io/hostname` | | `antiAffinity` | Setting this to hard enforces the [anti-affinity][] rules. If it is set to soft it will be done "best effort". Other values will be ignored | `hard` | | `clusterHealthCheckParams` | The [Elasticsearch cluster health status params][] that will be used by readiness [probe][] command | `wait_for_status=green&timeout=1s` | | `clusterName` | This will be used as the Elasticsearch [cluster.name][] and should be unique per cluster in the namespace | `elasticsearch` | | `clusterDeprecationIndexing` | Enable or disable deprecation logs to be indexed (should be disabled when deploying master only node groups) | `false` | | `enableServiceLinks` | Set to false to disabling service links, which can cause slow pod startup times when there are many services in the current namespace.