1、卸载系统之前的docker
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
2、设置安装地址
sudo yum install –y yum-utils device-mapper-persistent-data lvm2
yum-config-manager \
–add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
或
sudo yum-config-manager –add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo （阿里仓库）
更新yum索引列表并安装Docker引擎
sudo yum makecache fast
3、安装
sudo yum install docker-ce docker-ce-cli
4、启动
sudo systemctl start docker
自动启动
sudo systemctl enable docker
