docker node rm节点报错node ... ... is not down and can't be removed 问题的处理技巧

尝试将某个worker节点移除swarm集群，可是，报错了：

 

[root@nccztsjb-node-07 ~]# docker node rm cw5bome4a9g1rzelivxejd31c
Error response from daemon: rpc error: code = FailedPrecondition desc = node cw5bome4a9g1rzelivxejd31c is not down and can't be removed
 

面对错误，挡得住你吗？当然不能

 

以为是节点没有处于Drain状态，所以，先更新节点状态

 

[root@nccztsjb-node-07 ~]# docker node update --availability drain cw5bome4a9g1rzelivxejd31c
cw5bome4a9g1rzelivxejd31c

 

再次尝试移除，依然报错。

 

还咋搞？看看别人咋搞。还有没有别的办法：

 

将该节点移除swarm集群。

 

1、登录到这个要被移除的节点上

2、执行如下的命令

[root@nccztsjb-node-10 ~]# docker swarm leave
Node left the swarm.
[root@nccztsjb-node-10 ~]# 

那么，这个节点，就会离开swarm集群

 

完事了吗，回到manager节点

 

[root@nccztsjb-node-07 ~]# docker node ls
ID                            HOSTNAME           STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
mjktd9is5xd8d4el2awrqby5k *   nccztsjb-node-07   Ready     Active         Leader           20.10.17
u87i9artgcnyki0osp9gvylu3     nccztsjb-node-08   Ready     Active                          20.10.17
z1x3ufsdxekrt6w5n37m7azfe     nccztsjb-node-09   Ready     Active                          20.10.17
cw5bome4a9g1rzelivxejd31c     nccztsjb-node-10   Down      Drain                           20.10.17

 

还可以看到这个节点，再试试，rm

 

[root@nccztsjb-node-07 ~]# docker node rm cw5bome4a9g1rzelivxejd31c
cw5bome4a9g1rzelivxejd31c
[root@nccztsjb-node-07 ~]# docker node ls
ID                            HOSTNAME           STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
mjktd9is5xd8d4el2awrqby5k *   nccztsjb-node-07   Ready     Active         Leader           20.10.17
u87i9artgcnyki0osp9gvylu3     nccztsjb-node-08   Ready     Active                          20.10.17
z1x3ufsdxekrt6w5n37m7azfe     nccztsjb-node-09   Ready     Active                          20.10.17
[root@nccztsjb-node-07 ~]# 

 

如你所见，搞定了！开心伐？