CentOS7安装Docker

Docker官方文档：https://docs.docker.com/engine/install/centos/

1、卸载老版本

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

2、通过Docker仓库安装

yum install -y yum-utils

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

3、安装Docker引擎

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

4、启动Docker

systemctl start docker

5、启动hello-world

docker run hello-world

6、设置开机自启

systemctl enable docker