How to Install Docker Engine on CentOS 8
CentOS 8 has reached version 8.2.2004, and Docker officially onlysupply CentOS 7 installation package. What's going on?
I searched online and found that it was because Red Hat launched it themselves. buildah and podman Prepare to replace Docker.
Although the compatibility is good, can you install Docker under CentOS 8?
There is still a way, it just needs to be done manually. Just take a little time and follow the steps in this article.
This article will explain how to install Docker Engine and docker-compose under CentOS 8.
Update log for November 8, 2020:
At the time of writing this article, Docker has not yet officially released the rpm installation package under CentOS 8.
On September 17, 2020, Docker has officially released CentOS 8 rpm installation packageso there is an easier way to install Docker Engine.
Run the following command as root user:
wget -qO- get.docker.com | bash
Version number after installation is complete:
Client: Docker Engine - Community Version: 19.03.13 API version: 1.40 Go version: go1.13.15 Git commit: 4484c46d9d Built: Wed Sep 16 17:02:36 2020 OS/Arch: linux/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.13 API version: 1.40 (minimum version 1.12) Go version: go1.13.15 Git commit: 4484c46d9d Built: Wed Sep 16 17:01:11 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.3.7 GitCommit: 8fba4e9a7d01810a393d5d25a3621dc101981175 runc: Version: 1.0.0-rc10 GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init: Version: 0.18.0 GitCommit: fec3683
As for the installation method of docker-compose, you can continue to refer to the method in step 6 below this article.
——-The following is the dividing line of the original text——-
At the time of writing this article, the latest version number of Docker is 19.03.12.
$ docker version
Client: Docker Engine - Community Version: 19.03.12 API version: 1.40 Go version: go1.13.10 Git commit: 48a66213fe Built: Mon Jun 22 15:46:54 2020 OS/Arch: linux/amd64 Experimental: true Server: Docker Engine - Community Engine: Version: 19.03.12 API version: 1.40 (minimum version 1.12) Go version: go1.13.10 Git commit: 48a66213fe Built: Mon Jun 22 15:45:28 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.2.13 GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429 runc: Version: 1.0.0-rc10 GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init: Version: 0.18.0 GitCommit: fec3683
1. Install docker-ce.repo
The default under CentOS 8 is the dnf command for package management.
The first step is to install the official Docker repo and execute the command as follows:
$ dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
2. Show available versions
$ dnf list docker-ce --showduplicates
Return to the list below.
Available Packages docker-ce.x86_64 17.03.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.2.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.3.ce-1.el7 docker-ce-stable docker-ce.x86_64 17.06.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.06.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.06.2.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.09.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.09.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.12.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.12.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 18.03.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 18.03.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.2.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.3.ce-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.0-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.1-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.2-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.3-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.4-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.5-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.6-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.7-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.8-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.9-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.0-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.1-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.2-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.3-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.4-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.5-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.6-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.7-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.8-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.9-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.10-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.11-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.12-3.el7 docker-ce-stable
As you can see, as of now, the latest version has reached 19.03.12
3. Install dependencies in advance
To install docker-ce Dependencies must be installed in advance containerd.io, here is the biggest difference from automatic installation under CentOS 7.Clickhereview the latest version of containerd.io. Replace the download link in the command below appropriately.
Execute the following command:
$ dnf install -y https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.13-3.2.el7.x86_64.rpm
4. Install Docker
Execute the following command, note that there is a --nobest Options:
$ dnf install -y --nobest docker-ce
5. Start Docker
After the correct installation in the previous step, the next step is to start Docker and set it to start automatically at boot.
Start Docker command:
$ systemctl start docker
Check Docker status:
$ systemctl status docker
Set the command to automatically start Docker at boot:
$ systemctl enable docker
View Docker version information:
$ docker version
6. Install docker-compose
use pip3 It is easiest to install docker-compose.
Installed in advance pip3 It is necessary. If it is not installed on this machine, execute the following command to install it. pip3。
$ dnf install -y python3-pip
View pip3 version information:
$ pip3 --version
return value:
pip 9.0.3 from /usr/lib/python3.6/site-packages (python 3.6)
Install docker-compose command
$ pip3 install docker-compose
View docker-compose version information:
$ docker-compose --version
return value:
docker-compose version 1.26.2, build unknown