[GitHub] [rocketmq] elfwalk edited a discussion: docker部署5.1.1版本的controller模式，跨主机的broker主从不同步，也无法自动切换

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GitHub user elfwalk edited a discussion: 
docker部署5.1.1版本的controller模式，跨主机的broker主从不同步，也无法自动切换

**环境：**
1. 2台虚机：hostA 194.0.11.118、hostB 194.0.11.119
2. docker镜像：apache/rocketmq:5.1.1
3. hostA部署: nameserver+controller 3容器 + 2broker
```
#ControllerGroup        RaftGroup
#ControllerLeaderId     n1
#ControllerLeaderAddress        194.0.11.118:10082
#Peer:  n0:194.0.11.118:10081
#Peer:  n1:194.0.11.118:10082
#Peer:  n2:194.0.11.118:10083
```
4. hostB部署:  1broker

**现象：**
```
#brokerName     broker-a
#MasterBrokerId 1
#MasterAddr     194.0.11.118:10111
#MasterEpoch    3
#SyncStateSetEpoch      6
#SyncStateSetNums       2

InSyncReplica:  ReplicaIdentity{brokerName='broker-a', brokerId=1, 
brokerAddress='194.0.11.118:10111', alive=true}
InSyncReplica:  ReplicaIdentity{brokerName='broker-a', brokerId=2, 
brokerAddress='194.0.11.118:10211', alive=true}
NotInSyncReplica:       ReplicaIdentity{brokerName='broker-a', brokerId=3, 
brokerAddress='194.0.11.119:10311', alive=true}
```
```
#clusterName    DCluster
#brokerName     broker-a
#brokerAddr     194.0.11.118:10111
#brokerId       0
#Epoch: EpochEntry{epoch=1, startOffset=0, endOffset=0}

#clusterName    DCluster
#brokerName     broker-a
#brokerAddr     194.0.11.119:10311
#brokerId       3

#clusterName    DCluster
#brokerName     broker-a
#brokerAddr     194.0.11.118:10211
#brokerId       2
#Epoch: EpochEntry{epoch=1, startOffset=0, endOffset=0}
```


本来是hostA和hostB各自部署一个broker，作为主从，但hostB的broker一直无法加入SyncStateSet，导致主从无法同步，也就无法自动切换主从

尝试在hostA中再部署一个broker容器后，又发现新的broker可以正常加入SyncStateSet，主从切换也正常。


**怀疑：**
brokerIP1都有配成宿主机的IP，但broker间的通信是否走容器的私有IP，这样就能解释同一台的容器通信正常，跨主机的通信失败
大家是否有碰到同样问题的？有什么方法可以查看或验证broker间的通信是否正常？




GitHub link: https://github.com/apache/rocketmq/discussions/6914

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