11cc609aaa
The documentation for setting Kibana options with environment variables under Docker was brittle and difficult to maintain. Rather than list every option, this change describes the method by which they are defined, thus avoiding the need to edit the docs in multiple places when a new option is introduced.
113 lines
3.7 KiB
Plaintext
113 lines
3.7 KiB
Plaintext
[[docker]]
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== Running Kibana on Docker
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Docker images for Kibana are available from the Elastic Docker registry. The
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base image is https://hub.docker.com/_/centos/[centos:7] and the source code
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can be found on
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https://github.com/elastic/kibana-docker/tree/{branch}[GitHub].
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The images are shipped with https://www.elastic.co/products/x-pack[X-Pack]
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installed.
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NOTE: https://www.elastic.co/guide/en/x-pack/current/index.html[X-Pack] is
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pre-installed in this image. With X-Pack installed, Kibana expects to
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connect to an Elasticsearch cluster that is also running X-Pack.
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=== Pulling the image
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Obtaining Kibana for Docker is as simple as issuing a +docker pull+ command
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against the Elastic Docker registry.
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ifeval::["{release-state}"=="unreleased"]
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However, version {version} of Kibana has not yet been released, so no Docker
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image is currently available for this version.
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endif::[]
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ifeval::["{release-state}"!="unreleased"]
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The Docker image for Kibana {version} can be retrieved with the following
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command:
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["source","sh",subs="attributes"]
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--------------------------------------------
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docker pull {docker-image}
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--------------------------------------------
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endif::[]
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=== Configuring Kibana on Docker
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The Docker image provides several methods for configuring Kibana. The conventional
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approach is to provide a `kibana.yml` file as described in {kibana-ref}/settings.html[Configuring
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Kibana], but it's
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also possible to use environment variables to define settings.
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[[docker-bind-mount-config]]
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==== Bind-mounted configuration
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One way to configure Kibana on Docker is to provide `kibana.yml` via bind-mounting.
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With +docker-compose+, the bind-mount can be specified like this:
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["source","yaml",subs="attributes"]
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--------------------------------------------
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services:
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kibana:
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image: {docker-image}
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volumes:
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- ./kibana.yml:/usr/share/kibana/config/kibana.yml
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--------------------------------------------
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[[docker-env-config]]
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==== Environment variable configuration
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Under Docker, Kibana can be configured via environment variables. When
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the container starts, a helper process checks the environment for variables that
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can be mapped to Kibana command-line arguments.
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For compatibility with container orchestration systems, these
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environment variables are written in all capitals, with underscores as
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word separators. The helper translates these names to valid
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Kibana setting names.
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Some example translations are shown here:
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.Example Docker Environment Variables
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[horizontal]
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**Environment Variable**:: **Kibana Setting**
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`SERVER_NAME`:: `server.name`
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`KIBANA_DEFAULTAPPID`:: `kibana.defaultAppId`
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`XPACK_MONITORING_ENABLED`:: `xpack.monitoring.enabled`
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In general, any setting listed in <<settings>> or
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{xpack-ref}/xpack-settings.html[X-Pack Settings] can be configured
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with this technique.
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These variables can be set with +docker-compose+ like this:
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["source","yaml",subs="attributes"]
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----------------------------------------------------------
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services:
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kibana:
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image: {docker-image}
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environment:
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SERVER_NAME: kibana.example.org
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ELASTICSEARCH_URL: http://elasticsearch.example.org
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----------------------------------------------------------
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Since environment variables are translated to CLI arguments, they take
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precedence over settings configured in `kibana.yml`.
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==== Docker defaults
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The following settings have different default values when using the Docker image:
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[horizontal]
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`server.host`:: `"0"`
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`elasticsearch.url`:: `http://elasticsearch:9200`
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`elasticsearch.username`:: `elastic`
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`elasticsearch.password`:: `changeme`
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`xpack.monitoring.ui.container.elasticsearch.enabled`:: `true`
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These settings are defined in the default `kibana.yml`. They can be overridden
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with a <<docker-bind-mount-config,custom `kibana.yml`>> or via
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<<docker-env-config,environment variables>>.
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