Centos7中安装Docker

1.配置docker镜像安装源

tee /etc/yum.repos.d/docker.repo <<-‘EOF‘
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

4.安装docker

yum install docker-engine

5.启动docker

systemctl enable docker.service

systemctl start docker

卸载

1.查询安装过的包

yum list installed | grep docker

docker-engine.x86_64 17.03.0.ce-1.el7.centos @dockerrepo

2.删除安装的软件包

yum -y remove docker-engine.x86_64

3.删除镜像/容器等

rm -rf /var/lib/docker

参见：https://docs.docker.com/engine/installation/linux/centos/

感谢：http://www.cnblogs.com/xuezhigu/p/6553936.html 同学的知识分享。