CentOS7安装docker

安装之前，卸载旧版本

较旧的 Docker 版本称为 docker 或 docker-engine 。如果已安装这些程序，请卸载它们以及相关的依赖项。

[root@centos7 ~]# yum remove docker 
                  docker-client 
                  docker-client-latest 
                  docker-common 
                  docker-latest 
                  docker-latest-logrotate 
                  docker-logrotate 
                  docker-engine

安装 Docker Engine-Community

安装所需的软件包

[root@centos7 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

yum-utils 提供了 yum-config-manager ，并且 device mapper 存储驱动程序需要 device-mapper-persistent-data 和 lvm2。

设置yum源（选择其中一个即可）

官方源（比较慢）

[root@centos7 ~]# yum-config-manager --add-repo http://download.docker.com/linux/centos/docker-ce.repo

阿里源

[root@centos7 ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

清华大学源

[root@centos7 ~]# yum-config-manager --add-repo https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo

可以查看所有仓库中所有docker版本，并选择特定版本安装

[root@centos7 ~]# yum list docker-ce --showduplicates | sort -r

安装

可以选择特定的版本安装，yum install docker-ce-版本号，我选的是docker-ce-20.10.1，如下

[root@centos7 ~]# yum install docker-ce-20.10.1

也可以不选版本号，直接安装：

[root@centos7 ~]# yum install docker-ce docker-ce-cli containerd.io

安装完成后，查看安装的docker版本

[root@centos7 ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.1
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        831ebea
 Built:             Tue Dec 15 04:37:17 2020
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.1
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       f001486
  Built:            Tue Dec 15 04:35:42 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

启动 docker：

[root@centos7 ~]# systemctl start docker

设为开机自启动：

[root@centos7 ~]# systemctl enable  docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

运行 hello-world 镜像来验证是否正确安装了 Docker Engine-Community 。

[root@centos7 ~]# docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

[root@centos7 ~]# 

成功安装。

转载请附出处。

以上。

同步发布至：https://www.toutiao.com/item/6914088146883838467/