CentOS 7 安装 Docker

1、删除 旧版本 docker

# 查看是否有旧版本
rpm -qa | grep docker

# 结果
docker-common-1.13.1-162.git64e9980.el7.centos.x86_64
docker-client-1.13.1-162.git64e9980.el7.centos.x86_64
docker-1.13.1-162.git64e9980.el7.centos.x86_64

# 删除
yum remove docker docker-common docker-client

2、安装需要的软件包

yum install -y yum-utils device-mapper-persistent-data lvm2

3、添加Docker镜像仓库

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

把仓库地址中的https，全部改成http

sed -i 's|https://mirrors.aliyun.com|http://mirrors.aliyun.com|g' /etc/yum.repos.d/docker-ce.repo

 4、更新yum软件包索引

yum makecache fast

5、安装docker

（1）安装最新版本 

yum -y install docker-ce

（2）安装指定版本 

# 查看可用版本
yum list docker-ce --showduplicates | sort -r

# 下面是部分可用版本
 * webtatic: uk.repo.webtatic.com
 * updates: mirrors.aliyun.com
This system is not registered with an entitlement server. You can use subscription-manager to register.
              : manager
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, product-id, search-disabled-repos, subscription-
Installed Packages
 * extras: mirrors.aliyun.com
docker-ce.x86_64            3:19.03.9-3.el7                    docker-ce-stable 
docker-ce.x86_64            3:19.03.8-3.el7                    docker-ce-stable 
docker-ce.x86_64            3:19.03.0-3.el7                    docker-ce-stable 
docker-ce.x86_64            3:18.09.9-3.el7                    docker-ce-stable 
docker-ce.x86_64            3:18.09.8-3.el7                    docker-ce-stable 
docker-ce.x86_64            18.03.1.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            17.12.1.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            17.03.0.ce-1.el7.centos            docker-ce-stable 

# 安装指定版本
yum install -y docker-ce-19.03.9 docker-ce-cli-19.03.9 containerd.io

6、启动docker

systemctl start docker

7、查看

docker version

# 显示
Client: Docker Engine - Community
 Version:           19.03.9
 API version:       1.40
 Go version:        go1.13.10
 Git commit:        9d988398e7
 Built:             Fri May 15 00:25:27 2020
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.9
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.13.10
  Git commit:       9d988398e7
  Built:            Fri May 15 00:24:05 2020
  OS/Arch:          linux/amd64
  Experimental:     false

8、设置镜像源

vim /etc/docker/daemon.json
 
{
    "registry-mirrors": [
      "https://3cbychlz.mirror.aliyuncs.com",
      "http://hub-mirror.c.163.com",
      "https://registry.docker-cn.com",
      "https://docker.mirrors.ustc.edu.cn"
  ]
}

9、重载并重启

systemctl daemon-reload
systemctl restart docker

10、普通用户执行 Docker

# 把 devops 用户加入 docker 组
usermod -G docker devops