【redis问题】无限Waiting for the cluster to join......

大家好，我是老坛。

1. 问题描述

相信大家在搭建redis集群的时候都遇到过这样的问题，在执行了命令：

redis-cli --cluster create 47.94.201.245:7001 47.94.201.245:7002 47.94.201.245:7003 47.94.201.245:7004 47.94.201.245:7005 47.94.201.245:7006 --cluster-replicas 1

之后一直卡在 Waiting for the cluster to join这，一直阻塞：

>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 47.94.201.245:7005 to 47.94.201.245:7001
Adding replica 47.94.201.245:7006 to 47.94.201.245:7002
Adding replica 47.94.201.245:7004 to 47.94.201.245:7003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 11f15cbaa8be30190f348ca49e4fa222fd1f854b 47.94.201.245:7001
   slots:[0-5460] (5461 slots) master
M: f89f54d67ca64731dbee977aa37a87f8fe833281 47.94.201.245:7002
   slots:[5461-10922] (5462 slots) master
M: 0cc34305106e109579c93f9e9d595d82022b602e 47.94.201.245:7003
   slots:[10923-16383] (5461 slots) master
S: e9149384dfae51350c510ebb827b503cfb7be74c 47.94.201.245:7004
   replicates 11f15cbaa8be30190f348ca49e4fa222fd1f854b
S: b95462fed727d78263a04d6ee26b4f70f5081021 47.94.201.245:7005
   replicates f89f54d67ca64731dbee977aa37a87f8fe833281
S: f36793915fb1afbc0177ee568b2d9a97967b402d 47.94.201.245:7006
   replicates 0cc34305106e109579c93f9e9d595d82022b602e
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
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2. 问题解决

对于这个问题通常是因为端口没有开放的原因。大家可能会说，我的客户端访问端口明明开放了还有这个问题。这是因为除了客户端访问端口之外，还有一个集群间通信用到的总线端口。

总线端口的port是在原客户端访问端口的基础上加10000。比如你的客户端访问端口是7001，那你的总线端口就是17001。在总线端口没有开放的情况下，我们的集群也是无法正常搭建起来的，所以大家还需要把各节点的总线端口都开放一下才可以。

更多优质文章和代码资源请关注同名公众号：老坛聊开发

关于端口的开放，除了要看防火墙之外，如果大家是用的阿里云服务器也要看一下有没有加上相关的配置。

3. 总结

好有关搭建redis集群时遇到的无限Waiting for the cluster to join就给大家介绍到这里，希望大家点赞点关注！