How to install Docker on Oracle Linux 8/7

How to install Docker on Oracle Linux 8/7

What is Oracle Linux?

Oracle Linux is a Linux distribution packaged and freely distributed by Oracle, available partially under the GNU General Public License since late 2006. It is compiled from Red Hat Enterprise Linux source code, replacing Red Hat branding with Oracle's

Oracle Linux
Learn how to optimize and secure your infrastructure with virtualization, management, cloud native computing tools, all included with Oracle Linux operating environment.

Install Docker Engine on Oracle Linux 8 or 7

1. Run system update

First of all, run the system update command to rebuild the repo cache and update installed packages.

sudo yum update

2. Install Yum Config-manager

To add a repository without going through the repo file and edit to insert a repository URL, we can use the yum-config-manager tool. If you are using a minimal server version then you perhaps not have it. Thus, here is the command to install it.

sudo yum install -y yum-utils

3. Add Docker repository to Oracle Linux and Update Repo

Well, as Oracle is just like CentOS, thus we can use the CentOS repository officially available for users by Docker developers. And here is the command to add the same on Oracle Linux 8 or 7.

sudo yum-config-manager --add-repo
sudo yum update

4. Command to install Docker-Ce on Oracle Linux

To install Docker Engine, command line and contained (a standalone high-level container runtime) run, finally, this command…

sudo yum install docker-ce docker-ce-cli

Sample output as below, type "Y" and hit Enter

Dependencies resolved.
 Package                               Architecture       Version                                                  Repository                     Size
Installing:                         x86_64             1.6.6-3.1.el8                                            docker-ce-stable               33 M
 docker-ce                             x86_64             3:20.10.17-3.el8                                         docker-ce-stable               22 M
 docker-ce-cli                         x86_64             1:20.10.17-3.el8                                         docker-ce-stable               29 M
Installing dependencies:
 container-selinux                     noarch             2:2.179.1-1.module+el8.6.0+20665+a3b29bef                ol8_appstream                  58 k
 docker-ce-rootless-extras             x86_64             20.10.17-3.el8                                           docker-ce-stable              4.7 M
 fuse-common                           x86_64             3.3.0-15.0.2.el8                                         ol8_baseos_latest              22 k
 fuse-overlayfs                        x86_64             1.8.2-1.module+el8.6.0+20665+a3b29bef                    ol8_appstream                  73 k
 fuse3                                 x86_64             3.3.0-15.0.2.el8                                         ol8_baseos_latest              55 k
 fuse3-libs                            x86_64             3.3.0-15.0.2.el8                                         ol8_baseos_latest              95 k
 libcgroup                             x86_64             0.41-19.el8                                              ol8_baseos_latest              70 k
 libslirp                              x86_64             4.4.0-1.module+el8.6.0+20665+a3b29bef                    ol8_appstream                  70 k
 slirp4netns                           x86_64             1.1.8-2.module+el8.6.0+20665+a3b29bef                    ol8_appstream                  51 k
Installing weak dependencies:
 docker-scan-plugin                    x86_64             0.17.0-3.el8                                             docker-ce-stable              3.8 M
Enabling module streams:
 container-tools                                          ol8

Transaction Summary
Install  13 Packages

Total download size: 93 M
Installed size: 389 M
Is this ok [y/N]:

if you are running any error, you may need to enable the developer package

sudo yum-config-manager --enable ol7_developer

5. Enable and start docker service

Once the docker is installed run its daemon and mark it enabled, so that it can start automatically with system boot.

sudo systemctl start docker
sudo systemctl enable docker

6. Add User to Docker group

By default, docker needs the root access to run commands, thus without using sudo, you will get this error:

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/create?fromImage=ubuntu&tag=latest: dial unix /var/run/docker.sock: connect: permission denied

Therefore, we add our current or the user that you want to use to access docker to the docker group, hence we won’t need sudo usage with docker commands.

sudo usermod -aG docker ${USER}

Once done, you need to logout and login back to take this change affect

Note: Replace the {USER} with your username.

7. Install Docker Compose

This is an optional step, you are planning to use compose file, you may need docker-compose plugin

 sudo yum update
 sudo yum install docker-compose-plugin

Verify that Docker Compose is installed correctly by checking the version

docker compose version

8. Test the installation

You can run hello-world docker to test the installation

sudo docker run hello-world