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-selinux \
                  docker-engine-selinux \
                  docker-engine

2.设置存储库

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

添加源

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

3.安装docker社区版

sudo yum install docker-ce

4.启动关闭docker

systemctl start docker