一、脚本安装

  CentOS系统上可以使用此脚本进行安装：

      如下：

[root@localhost ~]# curl -sSL get.docker.com -o get-docker.sh
[root@localhost ~]# sh get-docker.sh --mirror Aliyun

错误：

[root@localhost ~]# sh get-docker.sh --mirror Aliyun
# Executing docker install script, commit: 26ff363bcf3b3f5a00498ac43694bf1c7d9ce16c
+ sh -c 'yum install -y -q yum-utils'
+ sh -c 'yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo'
Loaded plugins: fastestmirror
adding repo from: https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
grabbing file https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
+ '[' stable '!=' stable ']'
+ sh -c 'yum makecache'
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
CentOS7.0                                                                       | 3.6 kB  00:00:00
docker-ce-stable                                                                | 3.5 kB  00:00:00
(1/4): docker-ce-stable/x86_64/filelists_db                                     |  21 kB  00:00:00
(2/4): docker-ce-stable/x86_64/updateinfo                                       |   55 B  00:00:00
(3/4): docker-ce-stable/x86_64/primary_db                                       |  45 kB  00:00:00
(4/4): docker-ce-stable/x86_64/other_db                                         | 114 kB  00:00:00
Metadata Cache Created
+ '[' -n '' ']'
+ sh -c 'yum install -y -q docker-ce'
Error: Package: containerd.io-1.2.13-3.2.el7.x86_64 (docker-ce-stable)
           Requires: container-selinux >= 2:2.74
Error: Package: 3:docker-ce-19.03.12-3.el7.x86_64 (docker-ce-stable)
           Requires: container-selinux >= 2:2.74
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
出现上述错误，解决方法如下：

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@localhost ~]# yum install epel-release -y
[root@localhost ~]# yum install container-selinux

启动：

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

查看，出现client与engine之后说明安装与启动成功：

[root@localhost ~]# 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:      false

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