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4.9 KiB
Markdown
145 lines
4.9 KiB
Markdown
<!--[metadata]>
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+++
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title = "Installation on Oracle Linux"
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description = "Installation instructions for Docker on Oracle Linux."
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keywords = ["Docker, Docker documentation, requirements, linux, rhel, centos, oracle, ol"]
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[menu.main]
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parent = "smn_linux"
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+++
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<![end-metadata]-->
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# Oracle Linux 6 and 7
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You do not require an Oracle Linux Support subscription to install Docker on
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Oracle Linux.
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*For Oracle Linux customers with an active support subscription:*
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Docker is available in either the `ol6_x86_64_addons` or `ol7_x86_64_addons`
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channel for Oracle Linux 6 and Oracle Linux 7 on the [Unbreakable Linux Network
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(ULN)](https://linux.oracle.com).
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*For Oracle Linux users without an active support subscription:*
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Docker is available in the appropriate `ol6_addons` or `ol7_addons` repository
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on [Oracle Public Yum](http://public-yum.oracle.com).
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Docker requires the use of the Unbreakable Enterprise Kernel Release 3 (3.8.13)
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or higher on Oracle Linux. This kernel supports the Docker btrfs storage engine
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on both Oracle Linux 6 and 7.
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Due to current Docker limitations, Docker is only able to run only on the x86_64
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architecture.
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## To enable the *addons* channel via the Unbreakable Linux Network:
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1. Enable either the *ol6\_x86\_64\_addons* or *ol7\_x86\_64\_addons* channel
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via the ULN web interface.
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Consult the [Unbreakable Linux Network User's
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Guide](http://docs.oracle.com/cd/E52668_01/E39381/html/index.html) for
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documentation on subscribing to channels.
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## To enable the *addons* repository via Oracle Public Yum:
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The latest release of Oracle Linux 6 and 7 are automatically configured to use
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the Oracle Public Yum repositories during installation. However, the *addons*
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repository is not enabled by default.
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To enable the *addons* repository:
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1. Edit either `/etc/yum.repos.d/public-yum-ol6.repo` or
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`/etc/yum.repos.d/public-yum-ol7.repo`
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and set `enabled=1` in the `[ol6_addons]` or the `[ol7_addons]` stanza.
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## Installation
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1. Ensure the appropriate *addons* channel or repository has been enabled.
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2. Use yum to install the Docker package:
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$ sudo yum install docker
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## Starting Docker
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1. Now that it's installed, start the Docker daemon:
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1. On Oracle Linux 6:
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$ sudo service docker start
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2. On Oracle Linux 7:
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$ sudo systemctl start docker.service
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2. If you want the Docker daemon to start automatically at boot:
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1. On Oracle Linux 6:
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$ sudo chkconfig docker on
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2. On Oracle Linux 7:
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$ sudo systemctl enable docker.service
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**Done!**
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## Custom daemon options
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If you need to add an HTTP Proxy, set a different directory or partition for the
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Docker runtime files, or make other customizations, read our systemd article to
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learn how to [customize your systemd Docker daemon options](/articles/systemd/).
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## Using the btrfs storage engine
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Docker on Oracle Linux 6 and 7 supports the use of the btrfs storage engine.
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Before enabling btrfs support, ensure that `/var/lib/docker` is stored on a
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btrfs-based filesystem. Review [Chapter
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5](http://docs.oracle.com/cd/E37670_01/E37355/html/ol_btrfs.html) of the [Oracle
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Linux Administrator's Solution
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Guide](http://docs.oracle.com/cd/E37670_01/E37355/html/index.html) for details
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on how to create and mount btrfs filesystems.
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To enable btrfs support on Oracle Linux:
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1. Ensure that `/var/lib/docker` is on a btrfs filesystem.
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1. Edit `/etc/sysconfig/docker` and add `-s btrfs` to the `OTHER_ARGS` field.
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2. Restart the Docker daemon:
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You can now continue with the [Docker User Guide](/userguide/).
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## Uninstallation
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To uninstall the Docker package:
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$ sudo yum -y remove docker
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The above command will not remove images, containers, volumes, or user created
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configuration files on your host. If you wish to delete all images, containers,
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and volumes run the following command:
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$ rm -rf /var/lib/docker
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You must delete the user created configuration files manually.
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## Known issues
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### Docker unmounts btrfs filesystem on shutdown
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If you're running Docker using the btrfs storage engine and you stop the Docker
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service, it will unmount the btrfs filesystem during the shutdown process. You
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should ensure the filesystem is mounted properly prior to restarting the Docker
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service.
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On Oracle Linux 7, you can use a `systemd.mount` definition and modify the
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Docker `systemd.service` to depend on the btrfs mount defined in systemd.
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### SElinux support on Oracle Linux 7
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SElinux must be set to `Permissive` or `Disabled` in `/etc/sysconfig/selinux` to
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use the btrfs storage engine on Oracle Linux 7.
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## Further issues?
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If you have a current Basic or Premier Support Subscription for Oracle Linux,
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you can report any issues you have with the installation of Docker via a Service
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Request at [My Oracle Support](http://support.oracle.com).
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If you do not have an Oracle Linux Support Subscription, you can use the [Oracle
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Linux
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Forum](https://community.oracle.com/community/server_%26_storage_systems/linux/oracle_linux) for community-based support.
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