#查看docker服务
root@debnas:/home/vagrant# docker service ls
ID             NAME              MODE      REPLICAS   IMAGE                    PORTS
w4dzlhww86w1   portainer_agent   global    2/1        portainer/agent:latest
#删除服务
root@debnas:/home/vagrant# docker service rm portainer_agent
#查看节点
root@debnas:/home/vagrant# docker node ls
ID                            HOSTNAME   STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
lf9dk6pai10k1ukpun799twva     Tower      Down      Active                          19.03.14
u00ugusqrgalpamvvbw9ji2uj *   debnas     Ready     Active         Leader           20.10.12
#排空节点上的集群容器
root@debnas:/home/vagrant# docker node update --availability drain lf9dk6pai10k1ukpun799twva
lf9dk6pai10k1ukpun799twva
#删除节点
root@debnas:/home/vagrant# docker node rm lf9dk6pai10k1ukpun799twva
lf9dk6pai10k1ukpun799twva
#管理节点，解散集群
root@debnas:/home/vagrant# docker swarm leave --force
Node left the swarm.

各个节点离开集群（必须先是node节点离开集群，然后manager节点才能离开集群）

[root@server2 ~]# docker swarm leave   #server2对应的node节点离开集群
[root@server3 ~]# docker swarm leave   #server3对应的node节点离开集群
[root@server1 ~]# docker swarm leave --force   #必须使用参数--force,强制离开集群,否则会报错
[root@server1 ~]# docker node ls   #此时再次查看集群的节点,会报错。这是因为i集群已经散了,该节点不再是manager节点,而只有manager节点才能查看集群的节点。
Error response from daemon: This node is not a swarm manager. Use "docker swarm init" or "docker swarm join" to connect this node to swarm and try again.