删除服务
动态滚动更新服务
节点下线
3. 备忘单
4. 文档
https://docs.docker.com/engine/swarm/swarm-tutorial/scale-service/
https://docs.docker.com/engine/swarm/swarm-tutorial/rolling-update/
https://docs.docker.com/engine/swarm/ingress/
https://docs.docker.com/engine/reference/commandline/swarm_update/