如何安装到centos中：

link: https://blog.csdn.net/nklinsirui/article/details/80610058

# step1. Set up repository

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

# step2. Use Aliyun Docker

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# step3. install docker-ce latest

yum install docker-ce

# step4. enable docker service

systemctl enable docker

# step5. start docker

systemctl start docker

systemctl问题解决：

docker run -dit --privileged <image id> /usr/sbin/init

docker exec -it <container id> /bin/bash

容器转化为镜像：

docker commit -m "说明" -a "开发者" 72f1a8a0e394 仓库:tag

容器暴露端口：

docker run -d -p 5000:5000 training/webapp python app.py

容器重命名：

docker rename <old container-name> <new container-name>