cluster-computing - etcd 集群 ID 不匹配

Question

嘿，由于某种原因，我的集群 ID 不匹配，我将它放在 1 个节点上，然后在多次清除数据目录、更改集群 token 和节点名称后消失，但在另一个节点上出现

这是我使用的脚本

IP0=10.150.0.1
IP1=10.150.0.2
IP2=10.150.0.3
IP3=10.150.0.4
NODENAME0=node0
NODENAME1=node1
NODENAME2=node2
NODENAME3=node3

# changing these on each box
THISIP=$IP2
THISNODENAME=$NODENAME2

etcd --name $THISNODENAME --initial-advertise-peer-urls http://$THISIP:2380 \
 --data-dir /root/etcd-data \
 --listen-peer-urls http://$THISIP:2380 \
 --listen-client-urls http://$THISIP:2379,http://127.0.0.1:2379 \
 --advertise-client-urls http://$THISIP:2379 \
 --initial-cluster-token etcd-cluster-2 \
 --initial-cluster $NODENAME0=http://$IP0:2380,$NODENAME1=http://$IP1:2380,$NODENAME2=http://$IP2:2380,$NODENAME3=http://$IP3:2380 \
 --initial-cluster-state new

我得到

2016-11-11 22:13:12.090515 I | etcdmain: etcd Version: 2.3.7   
2016-11-11 22:13:12.090643 N | etcdmain: the server is already initialized as member before, starting as etcd member...
2016-11-11 22:13:12.090713 I | etcdmain: listening for peers on http://10.150.0.3:2380
2016-11-11 22:13:12.090745 I | etcdmain: listening for client requests on http://10.150.0.3:2379
2016-11-11 22:13:12.090771 I | etcdmain: listening for client requests on http://127.0.0.1:2379
2016-11-11 22:13:12.090960 I | etcdserver: name = node2
2016-11-11 22:13:12.090976 I | etcdserver: data dir = /root/etcd-data
2016-11-11 22:13:12.090983 I | etcdserver: member dir = /root/etcd-data/member
2016-11-11 22:13:12.090990 I | etcdserver: heartbeat = 100ms
2016-11-11 22:13:12.090995 I | etcdserver: election = 1000ms
2016-11-11 22:13:12.091001 I | etcdserver: snapshot count = 10000
2016-11-11 22:13:12.091011 I | etcdserver: advertise client URLs = http://10.150.0.3:2379
2016-11-11 22:13:12.091269 I | etcdserver: restarting member 7fbd572038b372f6 in cluster 4e73d7b9b94fe83b at commit index 4
2016-11-11 22:13:12.091317 I | raft: 7fbd572038b372f6 became follower at term 8
2016-11-11 22:13:12.091346 I | raft: newRaft 7fbd572038b372f6 [peers: [], term: 8, commit: 4, applied: 0, lastindex: 4, lastterm: 1]
2016-11-11 22:13:12.091516 I | etcdserver: starting server... [version: 2.3.7, cluster version: to_be_decided]
2016-11-11 22:13:12.091869 E | etcdmain: failed to notify systemd for readiness: No socket
2016-11-11 22:13:12.091894 E | etcdmain: forgot to set Type=notify in systemd service file?
2016-11-11 22:13:12.096380 N | etcdserver: added member 7508b3e625cfed5 [http://10.150.0.4:2380] to cluster 4e73d7b9b94fe83b
2016-11-11 22:13:12.099800 N | etcdserver: added member 14c76eb5d27acbc5 [http://10.150.0.1:2380] to cluster 4e73d7b9b94fe83b
2016-11-11 22:13:12.100957 N | etcdserver: added local member 7fbd572038b372f6 [http://10.150.0.2:2380] to cluster 4e73d7b9b94fe83b
2016-11-11 22:13:12.102711 N | etcdserver: added member d416fca114f17871 [http://10.150.0.3:2380] to cluster 4e73d7b9b94fe83b
2016-11-11 22:13:12.134330 E | rafthttp: request cluster ID mismatch (got cfd5ef74b3dcf6fe want 4e73d7b9b94fe83b)

其他成员甚至都没有运行，这怎么可能？

谢谢

Answer 1

对于所有从谷歌偶然发现这一点的人:

错误是关于对等成员 ID，它试图加入与集群中已经存在的另一个成员(可能是旧实例)同名的集群(具有相同的对等名称，但另一个 ID，这就是问题所在)。

您应该删除对等点并重新添加它 like shown in this helpful post :

In order to fix this it was pretty simple, first we had to log into an existing working server on the rest of the cluster and remove server00 from its member list:

etcdctl member remove <UID>

This free's up the ability to allow the new server00 to join but we needed to simply tell the cluster it could by issuing the add command:

etcdctl member add server00 http://1.2.3.4:2380

It you follow the logs on server00 you'll then see that everything spring into life. You can confirm this with the commands:

etcdctl member list

etcdctl cluster-health

使用“etcdctl member list”查找当前成员的ID是什么，并找到试图加入错误ID的集群，然后使用“etcdctl member remove”从“members”中删除该对等点并尝试重新加入他。
希望能帮助到你。