一、Docker版本

Docker 有两个版本：社区版（Community Edition，缩写为 CE）、企业版（Enterprise Edition，缩写为 EE）下面的安装都是社区版。

二、安装命令

0、切换root

sudo -s

1、更新新yum源

yum -y update

Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
github_git-lfs/x86_64/signature                                                                                                                                                       |  833 B  00:00:00     
github_git-lfs/x86_64/signature                                                                                                                                                       | 1.8 kB  00:00:00 !!! 
github_git-lfs-source/signature                                                                                                                                                       |  833 B  00:00:00     
github_git-lfs-source/signature                                                                                                                                                       | 1.8 kB  00:00:00 !!! 
Resolving Dependencies
--> Running transaction check
---> Package at.x86_64 0:3.1.13-24.el7 will be updated
---> Package at.x86_64 0:3.1.13-25.el7_9 will be an update
---> Package bash.x86_64 0:4.2.46-34.el7 will be updated .........................................................................................Complete!

2、yum-utils安装 

yum install -y yum-utils

Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile
Nothing to do 

3、Loading mirror speeds from cached hostfile 解决方案

确保服务能连接网络才能执行以下wget命令

 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo 

yum makecache fast 

yum install -y yum-utils

[root@]# yum install -y yum-utils
Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
github_git-lfs/x86_64/signature                                                                                                                                                       |  833 B  00:00:00     
github_git-lfs/x86_64/signature                                                                                                                                                       | 1.8 kB  00:00:00 !!! 
github_git-lfs-source/signature                                                                                                                                                       |  833 B  00:00:00     
github_git-lfs-source/signature                                                                                                                                                       | 1.8 kB  00:00:00 !!! 
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Nothing to do

 4、查看仓库中所有docker版本，并选择新版本安装

yum list docker-ce --showduplicates | sort -r

 * updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, langpacks, versionlock* extras: mirrors.aliyun.com
docker-ce.x86_64            3:20.10.9-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.8-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.7-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.6-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.5-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.4-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.3-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.2-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.21-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.20-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.19-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.18-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.17-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.16-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.15-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.14-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.1-3.el7                     docker-ce-stable
docker-ce.x86_64            3:20.10.13-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.12-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.11-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.10-3.el7                    docker-ce-stable
docker-ce.x86_64            3:20.10.0-3.el7                     docker-ce-stable
.............................................................
docker-ce.x86_64            17.03.3.ce-1.el7                    docker-ce-stable
docker-ce.x86_64            17.03.2.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            17.03.0.ce-1.el7.centos             docker-ce-stable* base: mirrors.aliyun.com
Available Packages

我选择安装的版本是 3:20.10.21-3.el7版本

yum install -y docker-ce-3:20.10.21-3.el7.x86_64

Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:20.10.21-3.el7 will be installed
.....................................
Installed:docker-ce.x86_64 3:20.10.21-3.el7                                                                                                                                                                          Dependency Installed:container-selinux.noarch 2:2.119.2-1.911c772.el7_8       containerd.io.x86_64 0:1.6.10-3.1.el7       docker-ce-cli.x86_64 1:20.10.21-3.el7       docker-ce-rootless-extras.x86_64 0:20.10.21-3.el7      docker-scan-plugin.x86_64 0:0.21.0-3.el7                 fuse-overlayfs.x86_64 0:0.7.2-6.el7_8       fuse3-libs.x86_64 0:3.6.1-4.el7             slirp4netns.x86_64 0:0.4.3-4.el7_8                     Complete!

5、启动docker

systemctl start docker

6、docker ps验证

[root@dev-001 yum.repos.d]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES 

7、设置开机自动启动

 systemctl enable docker