redis集群搭建及问题的决方法（一）

一时失言乱红尘 2022-05-09 07:20 134阅读 0赞

## **一、集群搭建主要配置如下：** ##

P61 bind 127.0.0.1//默认ip为127.0.0.1改为其他节点机器可访问 的ip  
注释掉bind;可以监听连接当前服务的所有-h 后的ip;例如;绑定了 127.0.0.1,但是登录时使用-h 10.9.17.153  
P80 protected-mode no //yes修改为no  
P84 port 8000 //端口8000-8005  
P128 daemonize yes //后台运行  
P150 pidfile /var/run/redis\_8000.pid  
P163 logfile 8000/redis.log  
P237 dump dump8000.rdb  
P593 appendonly yes  
P597 appendfilename “appendonly.aof”  
P721 cluster-enabled yes  
P729 cluster-config-file nodes\_8000.conf  
P735 cluster-node-timeout 15000 //请求超时 默认15秒，可 自行设置

## **二、搭建完成后依次启动各个实例** ##

redis-server 8000/redis.conf  
redis-server 8001/redis.conf  
redis-server 8002/redis.conf  
redis-server 8003/redis.conf  
redis-server 8004/redis.conf  
redis-server 8005/redis.conf

## **三、检查启动结果：** ##

\[root@cenos01 redis-3.2.11\]\# ps -ef|grep 800  
root 19360 1 0 23:19 ? 00:00:01 redis-server \*:8001 \[cluster\]  
root 19364 1 0 23:19 ? 00:00:01 redis-server \*:8002 \[cluster\]  
root 19368 1 0 23:19 ? 00:00:01 redis-server \*:8003 \[cluster\]  
root 19372 1 0 23:19 ? 00:00:01 redis-server \*:8004 \[cluster\]  
root 19378 1 0 23:19 ? 00:00:01 redis-server \*:8005 \[cluster\]  
root 19433 1 0 23:30 ? 00:00:01 redis-server \*:8000 \[cluster\]

## **四、以上启动后并不是一个真正的集群，以下开始创建集群** ##

在redis的根目录下的src目录下执行\*\*\*/redis-3.2.11/src，报错信息如下  
\[root@cenos01 src\]\# ./redis-trib.rb create 10.211.55.5:8000 10.211.55.5:8001 10.211.55.5:8002

> > > Creating cluster  
> > > Performing hash slots allocation on 3 nodes…  
> > > Using 3 masters:  
> > > 10.211.55.5:8000  
> > > 10.211.55.5:8001  
> > > 10.211.55.5:8002  
> > > M: 8ce851252f32fcab268e77d3b3ed976d57d2f498 10.211.55.5:8000  
> > > slots:0-5460 (5461 slots) master  
> > > M: 6f4a31fc322725fc4ed453a588f344fed4f261bf 10.211.55.5:8001  
> > > slots:5461-10922 (5462 slots) master  
> > > M: da7d09090520a0e6287ea12fe7f48225d6665f68 10.211.55.5:8002  
> > > slots:10923-16383 (5461 slots) master  
> > > Can I set the above configuration? (type ‘yes’ to accept): yes  
> > > /usr/local/lib/ruby/gems/2.3.0/gems/redis-4.0.2/lib/redis/client.rb:119:in `call': ERR Slot 1180 is already busy (Redis::CommandError) from /usr/local/lib/ruby/gems/2.3.0/gems/redis-4.0.2/lib/redis.rb:2854:in`block in method\_missing’  
> > > from /usr/local/lib/ruby/gems/2.3.0/gems/redis-4.0.2/lib/redis.rb:45:in `block in synchronize' from /usr/local/lib/ruby/2.3.0/monitor.rb:214:in`mon\_synchronize’  
> > > from /usr/local/lib/ruby/gems/2.3.0/gems/redis-4.0.2/lib/redis.rb:45:in `synchronize' from /usr/local/lib/ruby/gems/2.3.0/gems/redis-4.0.2/lib/redis.rb:2853:in`method\_missing’  
> > > from ./redis-trib.rb:212:in `flush_node_config' from ./redis-trib.rb:776:in`block in flush\_nodes\_config’  
> > > from ./redis-trib.rb:775:in `each' from ./redis-trib.rb:775:in`flush\_nodes\_config’  
> > > from ./redis-trib.rb:1296:in `create_cluster_cmd' from ./redis-trib.rb:1701:in`’

## **五、针对以上问题的解决方法：** ##

所有redis服务器都执行以下命令：

$redis-cli -p 端口号  
$flushall  
$cluster reset soft  
$exit

## **六、解决后再次创建，就成功了** ##

\[root@cenos01 src\]\# ./redis-trib.rb create 10.211.55.5:8000 10.211.55.5:8001 10.211.55.5:8002

> > > Creating cluster  
> > > Performing hash slots allocation on 3 nodes…  
> > > Using 3 masters:  
> > > 10.211.55.5:8000  
> > > 10.211.55.5:8001  
> > > 10.211.55.5:8002  
> > > M: 8ce851252f32fcab268e77d3b3ed976d57d2f498 10.211.55.5:8000  
> > > slots:0-5460 (5461 slots) master  
> > > M: 6f4a31fc322725fc4ed453a588f344fed4f261bf 10.211.55.5:8001  
> > > slots:5461-10922 (5462 slots) master  
> > > M: da7d09090520a0e6287ea12fe7f48225d6665f68 10.211.55.5:8002  
> > > slots:10923-16383 (5461 slots) master  
> > > 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…
> 
> > > Performing Cluster Check (using node 10.211.55.5:8000)  
> > > M: 8ce851252f32fcab268e77d3b3ed976d57d2f498 10.211.55.5:8000  
> > > slots:0-5460 (5461 slots) master  
> > > 0 additional replica(s)  
> > > M: 6f4a31fc322725fc4ed453a588f344fed4f261bf 10.211.55.5:8001  
> > > slots:5461-10922 (5462 slots) master  
> > > 0 additional replica(s)  
> > > M: da7d09090520a0e6287ea12fe7f48225d6665f68 10.211.55.5:8002  
> > > slots:10923-16383 (5461 slots) master  
> > > 0 additional replica(s)  
> > > \[OK\] All nodes agree about slots configuration.
> 
> > > Check for open slots…  
> > > Check slots coverage…  
> > > \[OK\] All 16384 slots covered.

\*\*

## 七、查看集群状态 ##

\*\*  
\[root@cenos01 src\]\# redis-cli -c -p 8000  
127.0.0.1:8000> cluster info  
cluster\_state:ok  
cluster\_slots\_assigned:16384  
cluster\_slots\_ok:16384  
cluster\_slots\_pfail:0  
cluster\_slots\_fail:0  
cluster\_known\_nodes:3  
cluster\_size:3  
cluster\_current\_epoch:3  
cluster\_my\_epoch:1  
cluster\_stats\_messages\_sent:2059  
cluster\_stats\_messages\_received:2059

***cluster\_current\_epoch:6 代表当前集群的最新逻辑计算时间，数字 越大，表示操作或者配置越新，整个集群的这个值是保持一致的  
cluster\_my\_epoch:1代表当前节点的逻辑计算时间***

## **八、查看槽道分配情况和集群节点信息** ##

127.0.0.1:8000> cluster nodes  
8ce851252f32fcab268e77d3b3ed976d57d2f498 10.211.55.5:8000 myself,master - 0 0 1 connected 0-5460  
6f4a31fc322725fc4ed453a588f344fed4f261bf 10.211.55.5:8001 master - 0 1538582282356 2 connected 5461-10922  
da7d09090520a0e6287ea12fe7f48225d6665f68 10.211.55.5:8002 master - 0 1538582283359 3 connected 10923-16383

以上只挂载了主节点，关于从节点的挂载步骤和方法见本人的下一篇博客文章。