docker安装

1、安装

• 卸载之前的docker

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

• 安装必要的依赖

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

• 设置docker仓库

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

• 安装docker

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

• 启动docker

sudo systemctl start docker

• 测试docker安装是否成功

sudo docker run hello-world

配置阿里云镜像
https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors