[[docker]]
=== Install {kib} with Docker
++++
<titleabbrev>Install with Docker </titleabbrev>
++++

Docker images for Kibana are available from the Elastic Docker registry. The
base image is https://hub.docker.com/_/centos/[centos:7].

A list of all published Docker images and tags is available at
https://www.docker.elastic.co[www.docker.elastic.co]. The source code is in
https://github.com/elastic/dockerfiles/tree/{branch}/kibana[GitHub].

These images are free to use under the Elastic license. They contain open source
and free commercial features and access to paid commercial features.
<<managing-licenses,Start a 30-day trial>> to try out all of the
paid commercial features. See the
https://www.elastic.co/subscriptions[Subscriptions] page for information about
Elastic license levels.

[float]
[[pull-image]]
=== Pull the image

Obtaining Kibana for Docker is as simple as issuing a +docker pull+ command
against the Elastic Docker registry.

ifeval::["{release-state}"=="unreleased"]

However, version {version} of Kibana has not yet been released, so no Docker
image is currently available for this version.

endif::[]

ifeval::["{release-state}"!="unreleased"]

["source","txt",subs="attributes"]
--------------------------------------------
docker pull {docker-repo}:{version}
--------------------------------------------

[float]
=== Run Kibana on Docker for development
Kibana can be quickly started and connected to a local Elasticsearch container for development
or testing use with the following command:
--------------------------------------------
docker run --link YOUR_ELASTICSEARCH_CONTAINER_NAME_OR_ID:elasticsearch -p 5601:5601 {docker-repo}:{version}
--------------------------------------------
endif::[]

[float]
[[configuring-kibana-docker]]
=== Configure Kibana on Docker

The Docker images provide several methods for configuring Kibana. The
conventional approach is to provide a `kibana.yml` file as described in
{kibana-ref}/settings.html[Configuring Kibana], but it's also possible to use
environment variables to define settings.

[float]
[[bind-mount-config]]
==== Bind-mounted configuration

One way to configure Kibana on Docker is to provide `kibana.yml` via bind-mounting.
With +docker-compose+, the bind-mount can be specified like this:

["source","yaml",subs="attributes"]
--------------------------------------------
version: '2'
services:
  kibana:
    image: {docker-image}
    volumes:
      - ./kibana.yml:/usr/share/kibana/config/kibana.yml
--------------------------------------------

[float]
[[environment-variable-config]]
==== Environment variable configuration

Under Docker, {kib} can be configured via environment variables. When
the container starts, a helper process checks the environment for variables that
can be mapped to Kibana command-line arguments.

For compatibility with container orchestration systems, these
environment variables are written in all capitals, with underscores as
word separators. The helper translates these names to valid
{kib} setting names.

WARNING: All information that you include in environment variables is visible through the `ps` command, including sensitive information.

Some example translations are shown here:

.Example Docker Environment Variables
[horizontal]
**Environment Variable**:: **Kibana Setting**
`SERVER_NAME`:: `server.name`
`SERVER_BASEPATH`:: `server.basePath`
`MONITORING_ENABLED`:: `monitoring.enabled`

In general, any setting listed in <<settings>> can be
configured with this technique.

These variables can be set with +docker-compose+ like this:

["source","yaml",subs="attributes"]
----------------------------------------------------------
version: '2'
services:
  kibana:
    image: {docker-image}
    environment:
      SERVER_NAME: kibana.example.org
      ELASTICSEARCH_HOSTS: http://elasticsearch.example.org
----------------------------------------------------------

Since environment variables are translated to CLI arguments, they take
precedence over settings configured in `kibana.yml`.

[float]
[[docker-defaults]]
==== Docker defaults
The following settings have different default values when using the Docker
images:

[horizontal]
`server.name`:: `kibana`
`server.host`:: `"0"`
`elasticsearch.hosts`:: `http://elasticsearch:9200`
`monitoring.ui.container.elasticsearch.enabled`:: `true`

These settings are defined in the default `kibana.yml`. They can be overridden
with a <<bind-mount-config,custom `kibana.yml`>> or via
<<environment-variable-config,environment variables>>.

IMPORTANT: If replacing `kibana.yml` with a custom version, be sure to copy the
defaults to the custom file if you want to retain them. If not, they will
be "masked" by the new file.