Docker的安装

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-engine

注：未安装过可以跳过

2、设置Docker存储库

sudo yum install -y yum-utils
sudo yum-config-manager --add-repo \ 
        https://download.docker.com/linux/centos/docker-ce.repo

国内阿里云镜像：https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3、安装Docker引擎

sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

4、启动Docker

sudo systemctl start docker

5、设置开机启动

sudo systemctl enable docker

6、可选：配置镜像仓库

vim /etc/docker/daemon.json
-----------------------------------------------------------------------------------------
{
"registry-mirrors": ["https://<你的ID>.mirror.aliyuncs.com"]
}
腾讯云可配置：https://mirror.ccs.tencentyun.com

sudo systemctl daemon-reload
sudo systemctl restart docker

重启docker，通过 docker info 命令查看Registry Mirrors是否配置成功