Docker is a container engine that uses the Linux Kernel to create the containers on top of an operating system. Which is used to create, deploy and run the applications
First, check and install any pending system updates.
yum update
Adding Docker repository
Enable the Docker CE repository by running the following command.
dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
Output:
[root@server ~]# dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
Adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
Installing the Docker-CE package
Install the Docker-CE package on AlmaLinux 9 by running the following command.
dnf -y install docker-ce --nobest
Output:
[root@server ~]# dnf -y install docker-ce --nobest
Docker CE Stable - x86_64 9.6 kB/s | 5.8 kB 00:00
Dependencies resolved.
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Package Architecture Version Repository Size
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Installing:
docker-ce x86_64 3:20.10.16-3.el9 docker-ce-stable 21 M
Installing dependencies:
container-selinux noarch 3:2.179.1-1.el9_0 appstream 45 k
containerd.io x86_64 1.6.4-3.1.el9 docker-ce-stable 32 M
docker-ce-cli x86_64 1:20.10.16-3.el9 docker-ce-stable 29 M
docker-ce-rootless-extras x86_64 20.10.16-3.el9 docker-ce-stable 3.8 M
fuse-common x86_64 3.10.2-5.el9 baseos 8.0 k
fuse-overlayfs x86_64 1.8.2-1.el9 appstream 71 k
fuse3 x86_64 3.10.2-5.el9 appstream 53 k
fuse3-libs x86_64 3.10.2-5.el9 appstream 91 k
libslirp x86_64 4.4.0-7.el9 appstream 68 k
slirp4netns x86_64 1.1.12-4.el9 appstream 44 k
tar x86_64 2:1.34-3.el9 baseos 880 k
Installing weak dependencies:
docker-scan-plugin x86_64 0.17.0-3.el9 docker-ce-stable 3.6 M
Enable the Docker service.
systemctl enable --now docker
Output:
[root@server ~]# systemctl enable --now docker
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
Checking the Docker service
To verify the Docker service is running, use the following command,
systemctl status docker
Output:
[root@server ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2022-05-24 21:46:00 CEST; 22s ago
TriggeredBy: ● docker.socket
Docs: https://docs.docker.com
Main PID: 9099 (dockerd)
Tasks: 7
Memory: 34.0M
CPU: 263ms
CGroup: /system.slice/docker.service
└─9099 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
DONE!