centos7下安装docker

1更新yum

yum update

2卸载 旧版本

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

3安装软件包

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

4设置yum源

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

5查看所有仓库中所有docker版本

yum list docker-ce --showduplicates | sort -r

6安装docker

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