1/ 卸载旧版本的docker
$ 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/安装步骤
$ sudo yum install -y yum-utils\
device-mapper-persistent-data\
lvm2
$ sudo yum-config-manager\
--add-repo\
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
$ sudo yum install docker-ce
$ sudo systemctl start docker
$ sudo docker run hello-world
参考文档:docker官网
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