Docker

卸载系统之前的docker

sudo yum remove docker \

                  docker-client \

                  docker-client-latest \

                  docker-common \

                  docker-latest \

                  docker-latest-logrotate \

                  docker-logrotate \

                  docker-engine

安装需要的软件包

sudo yum install -y yum-utils

配置阿里云镜像

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

安装Docker CE

sudo yum install docker-ce docker-ce-cli containerd.io 

启动Docker

sudo systemctl start docker

设置开机自启

sudo systemctl enable docker

查看Docker版本

docker -v

查看本地所有镜像

sudo docker images

配置镜像加速（在Docker下载其他东西时会加快）

1.

 sudo mkdir -p /etc/docker

2.

sudo tee /etc/docker/daemon.json <<-'EOF'

{

  "registry-mirrors": ["https://chqac97z.mirror.aliyuncs.com"]

}

EOF

3.

sudo systemctl daemon-reload

4.重启

sudo systemctl restart docker