CentOS 安装Docker

1.卸载旧版本

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

2.安装须要的软件包

$ sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2

//设置yum源
$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

3.安装Docker CE

$ sudo yum install docker-ce

4.启动并加入开机启动

$ sudo systemctl start docker
$ sudo systemctl enable docker

5.验证是否安装成功

//通常包含client和server两部分表明安装成功
$ docker version

6.官方镜像加速

// /etc/docker/daemon.json 
    {
      "registry-mirrors": ["https://registry.docker-cn.com"]
    }