mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
214 lines
6.8 KiB
Markdown
214 lines
6.8 KiB
Markdown
<!--[metadata]>
|
|
+++
|
|
aliases = [ "/engine/installation/oracle/"]
|
|
title = "Installation on Oracle Linux"
|
|
description = "Installation instructions for Docker on Oracle Linux."
|
|
keywords = ["Docker, Docker documentation, requirements, linux, rhel, centos, oracle, ol"]
|
|
[menu.main]
|
|
parent = "engine_linux"
|
|
+++
|
|
<![end-metadata]-->
|
|
|
|
# Oracle Linux
|
|
|
|
Docker is supported Oracle Linux 6 and 7. You do not require an Oracle Linux
|
|
Support subscription to install Docker on Oracle Linux.
|
|
|
|
## Prerequisites
|
|
|
|
Due to current Docker limitations, Docker is only able to run only on the x86_64
|
|
architecture. Docker requires the use of the Unbreakable Enterprise Kernel
|
|
Release 4 (4.1.12) or higher on Oracle Linux. This kernel supports the Docker
|
|
btrfs storage engine on both Oracle Linux 6 and 7.
|
|
|
|
## Install
|
|
|
|
|
|
> **Note**: The procedure below installs binaries built by Docker. These binaries
|
|
> are not covered by Oracle Linux support. To ensure Oracle Linux support, please
|
|
> follow the installation instructions provided in the
|
|
> [Oracle Linux documentation](https://docs.oracle.com/en/operating-systems/?tab=2).
|
|
>
|
|
> The installation instructions for Oracle Linux 6 can be found in [Chapter 10 of
|
|
> the Administrator's
|
|
> Solutions Guide](https://docs.oracle.com/cd/E37670_01/E37355/html/ol_docker.html)
|
|
>
|
|
> The installation instructions for Oracle Linux 7 can be found in [Chapter 29 of
|
|
> the Administrator's
|
|
> Guide](https://docs.oracle.com/cd/E52668_01/E54669/html/ol7-docker.html)
|
|
|
|
|
|
1. Log into your machine as a user with `sudo` or `root` privileges.
|
|
|
|
2. Make sure your existing yum packages are up-to-date.
|
|
|
|
$ sudo yum update
|
|
|
|
3. Add the yum repo yourself.
|
|
|
|
For version 6:
|
|
|
|
$ sudo tee /etc/yum.repos.d/docker.repo <<-EOF
|
|
[dockerrepo]
|
|
name=Docker Repository
|
|
baseurl=https://yum.dockerproject.org/repo/main/oraclelinux/6
|
|
enabled=1
|
|
gpgcheck=1
|
|
gpgkey=https://yum.dockerproject.org/gpg
|
|
EOF
|
|
|
|
For version 7:
|
|
|
|
$ cat >/etc/yum.repos.d/docker.repo <<-EOF
|
|
[dockerrepo]
|
|
name=Docker Repository
|
|
baseurl=https://yum.dockerproject.org/repo/main/oraclelinux/7
|
|
enabled=1
|
|
gpgcheck=1
|
|
gpgkey=https://yum.dockerproject.org/gpg
|
|
EOF
|
|
|
|
4. Install the Docker package.
|
|
|
|
$ sudo yum install docker-engine
|
|
|
|
5. Start the Docker daemon.
|
|
|
|
On Oracle Linux 6:
|
|
|
|
$ sudo service docker start
|
|
|
|
On Oracle Linux 7:
|
|
|
|
$ sudo systemctl start docker.service
|
|
|
|
6. Verify `docker` is installed correctly by running a test image in a container.
|
|
|
|
$ sudo docker run hello-world
|
|
|
|
## Optional configurations
|
|
|
|
This section contains optional procedures for configuring your Oracle Linux to work
|
|
better with Docker.
|
|
|
|
* [Create a docker group](#create-a-docker-group)
|
|
* [Configure Docker to start on boot](#configure-docker-to-start-on-boot)
|
|
* [Use the btrfs storage engine](#use-the-btrfs-storage-engine)
|
|
|
|
### Create a Docker group
|
|
|
|
The `docker` daemon binds to a Unix socket instead of a TCP port. By default
|
|
that Unix socket is owned by the user `root` and other users can access it with
|
|
`sudo`. For this reason, `docker` daemon always runs as the `root` user.
|
|
|
|
To avoid having to use `sudo` when you use the `docker` command, create a Unix
|
|
group called `docker` and add users to it. When the `docker` daemon starts, it
|
|
makes the ownership of the Unix socket read/writable by the `docker` group.
|
|
|
|
>**Warning**: The `docker` group is equivalent to the `root` user; For details
|
|
>on how this impacts security in your system, see [*Docker Daemon Attack
|
|
>Surface*](../../security/security.md#docker-daemon-attack-surface) for details.
|
|
|
|
To create the `docker` group and add your user:
|
|
|
|
1. Log into Oracle Linux as a user with `sudo` privileges.
|
|
|
|
2. Create the `docker` group.
|
|
|
|
sudo groupadd docker
|
|
|
|
3. Add your user to `docker` group.
|
|
|
|
sudo usermod -aG docker username
|
|
|
|
4. Log out and log back in.
|
|
|
|
This ensures your user is running with the correct permissions.
|
|
|
|
5. Verify your work by running `docker` without `sudo`.
|
|
|
|
$ docker run hello-world
|
|
|
|
If this fails with a message similar to this:
|
|
|
|
Cannot connect to the Docker daemon. Is 'docker daemon' running on this host?
|
|
|
|
Check that the `DOCKER_HOST` environment variable is not set for your shell.
|
|
If it is, unset it.
|
|
|
|
### Configure Docker to start on boot
|
|
|
|
You can configure the Docker daemon to start automatically at boot.
|
|
|
|
On Oracle Linux 6:
|
|
|
|
```
|
|
$ sudo chkconfig docker on
|
|
```
|
|
|
|
On Oracle Linux 7:
|
|
|
|
```
|
|
$ sudo systemctl enable docker.service
|
|
```
|
|
|
|
If you need to add an HTTP Proxy, set a different directory or partition for the
|
|
Docker runtime files, or make other customizations, read our systemd article to
|
|
learn how to [customize your systemd Docker daemon options](../../admin/systemd.md).
|
|
|
|
### Use the btrfs storage engine
|
|
|
|
Docker on Oracle Linux 6 and 7 supports the use of the btrfs storage engine.
|
|
Before enabling btrfs support, ensure that `/var/lib/docker` is stored on a
|
|
btrfs-based filesystem. Review [Chapter
|
|
5](http://docs.oracle.com/cd/E37670_01/E37355/html/ol_btrfs.html) of the [Oracle
|
|
Linux Administrator's Solution
|
|
Guide](http://docs.oracle.com/cd/E37670_01/E37355/html/index.html) for details
|
|
on how to create and mount btrfs filesystems.
|
|
|
|
To enable btrfs support on Oracle Linux:
|
|
|
|
1. Ensure that `/var/lib/docker` is on a btrfs filesystem.
|
|
|
|
2. Edit `/etc/sysconfig/docker` and add `-s btrfs` to the `OTHER_ARGS` field.
|
|
|
|
3. Restart the Docker daemon:
|
|
|
|
## Uninstallation
|
|
|
|
To uninstall the Docker package:
|
|
|
|
$ sudo yum -y remove docker-engine
|
|
|
|
The above command will not remove images, containers, volumes, or user created
|
|
configuration files on your host. If you wish to delete all images, containers,
|
|
and volumes run the following command:
|
|
|
|
$ rm -rf /var/lib/docker
|
|
|
|
You must delete the user created configuration files manually.
|
|
|
|
## Known issues
|
|
|
|
### Docker unmounts btrfs filesystem on shutdown
|
|
If you're running Docker using the btrfs storage engine and you stop the Docker
|
|
service, it will unmount the btrfs filesystem during the shutdown process. You
|
|
should ensure the filesystem is mounted properly prior to restarting the Docker
|
|
service.
|
|
|
|
On Oracle Linux 7, you can use a `systemd.mount` definition and modify the
|
|
Docker `systemd.service` to depend on the btrfs mount defined in systemd.
|
|
|
|
### SElinux support on Oracle Linux 7
|
|
SElinux must be set to `Permissive` or `Disabled` in `/etc/sysconfig/selinux` to
|
|
use the btrfs storage engine on Oracle Linux 7.
|
|
|
|
## Further issues?
|
|
|
|
If you have a current Basic or Premier Support Subscription for Oracle Linux,
|
|
you can report any issues you have with the installation of Docker via a Service
|
|
Request at [My Oracle Support](http://support.oracle.com).
|
|
|
|
If you do not have an Oracle Linux Support Subscription, you can use the [Oracle
|
|
Linux
|
|
Forum](https://community.oracle.com/community/server_%26_storage_systems/linux/oracle_linux) for community-based support.
|