redis集群的搭建

布满荆棘的人生 2022-06-09 08:18 151阅读 0赞

由于电脑配置不够，就在一个虚拟机上装了8台Redis前提是得把每一台的端口号修改掉保证不一样，我先创建了六台Redis的集群。剩余两台留着下面的添加主集群和从集群。

一、启动集群所需的六台Redis

\[root@localhost clusterRedis\]\# cd 7001/bin/  
\[root@localhost bin\]\# ./redis-server redis.conf   
\[root@localhost bin\]\# cd ..  
\[root@localhost 7001\]\# cd ..  
\[root@localhost clusterRedis\]\# cd 7002/bin/  
\[root@localhost bin\]\# ./redis-se  
redis-sentinel  redis-server      
\[root@localhost bin\]\# ./redis-server redis.conf   
\[root@localhost bin\]\# cd ../../  
\[root@localhost clusterRedis\]\# cd 7003/bin/  
\[root@localhost bin\]\# ./redis-server redis.conf   
\[root@localhost bin\]\# cd ..  
\[root@localhost 7003\]\# cd ..  
\[root@localhost clusterRedis\]\# cd 7004/bin/  
\[root@localhost bin\]\# ./redis-server redis.conf   
\[root@localhost bin\]\# cd ..  
\[root@localhost 7004\]\# cd ..  
\[root@localhost clusterRedis\]\# cd 7005/bin/  
\[root@localhost bin\]\# ./redis-server redis.conf   
\[root@localhost bin\]\# cd ..  
\[root@localhost 7005\]\# cd ..  
\[root@localhost clusterRedis\]\# cd 7006/bin/  
\[root@localhost bin\]\# ./redis-server redis.conf

\[root@localhost bin\]\# ps -ef | grep redis

root      6330     1  0 19:21 ?        00:00:06 ./redis-server \*:6379      
root      6532     1  0 20:18 ?        00:00:00 ./redis-server \*:7001 \[cluster\]  
root      6536     1  0 20:18 ?        00:00:00 ./redis-server \*:7002 \[cluster\]  
root      6541     1  0 20:18 ?        00:00:00 ./redis-server \*:7003 \[cluster\]  
root      6545     1  0 20:18 ?        00:00:00 ./redis-server \*:7004 \[cluster\]  
root      6549     1  0 20:19 ?        00:00:00 ./redis-server \*:7005 \[cluster\]  
root      6553     1  0 20:19 ?        00:00:00 ./redis-server \*:7006 \[cluster\]  
root      6557  1933  0 20:19 pts/0    00:00:00 grep redis  
  
  
二、创建集群  
命令：./redis-trib.rb create --replicas 1 192.168.224.129:7001 192.168.224.129:7002 192.168.224.129:7003 192.168.224.129:7004   
  
192.168.224.129:7005  192.168.224.129:7006  
  redis-trib.rb：创建集群插件  
create:插件命令，创建集群  
\--replicas 1：每一个服务器必须至少有一个备份服务器  
  
查看集群信息：先登录集群，才能查询  
登录命令：./redis-cli -c -h 192.168.224.129 -p 7001 --raw  
查看集群运行状态：  
192.168.224.129:7001> cluster info  
cluster\_state:ok  
cluster\_slots\_assigned:16384  
cluster\_slots\_ok:16384  
cluster\_slots\_pfail:0  
cluster\_slots\_fail:0  
cluster\_known\_nodes:6  
cluster\_size:3  
cluster\_current\_epoch:6  
cluster\_my\_epoch:1  
cluster\_stats\_messages\_sent:229  
cluster\_stats\_messages\_received:229  
查看集群节点信息：  
命令：cluster nodes  
192.168.66.66:7001> cluster nodes  
789c96a262d9a4c2c3523b886109cd23ab0fae3c 192.168.224.129:7002 master - 0 1488630409874 2 connected 5461-10922  
1bb679eee0152d6d4ad498525ed66ff8bead1c1d 192.168.224.129:7006 slave 1faa2ea7981e5585cf114140b128f077efa40a94 0 1488630406794 6 connected  
1faa2ea7981e5585cf114140b128f077efa40a94 192.168.224.129:7003 master - 0 1488630410897 3 connected 10923-16383  
204ec3fe2b3bc6a8e0df75a63f357bb5db83b0b1 192.168.224.129:7005 slave 789c96a262d9a4c2c3523b886109cd23ab0fae3c 0 1488630411936 5 connected  
87c18786ef18e8765449cbda2684f20433695378 192.168.224.129:7004 slave be6fcecb1b596b9369b159c54ff6946acb38bc7e 0 1488630408851 4 connected  
be6fcecb1b596b9369b159c54ff6946acb38bc7e 192.168.224.129:7001 myself,master - 0 0 1 connected 0-5460  
三、动态添加集群节点  
  
1、默认添加主节点master  
需求：需要把7007节点添加到集群中  
前提：7007REDIS服务必须处于启动状态，才能把7007服务添加到集群中  
添加命令：./redis-trib.rb add-node  192.168.224.129:7007 192.168.224.129:7001  
  
add-node:表示添加集群节点，默认添加主节点  
192.168.224.129:7007：需求添加的节点  
192.168.224.129:7001：参考节点，表示把7007节点添加到7001所在集群  
添加成功：\[OK\] New node added correctly.  
2、分配存储空间  
从新分配存储空间命令：./redis-trib.rb reshard 192.168.224.129:7001  
  
    reshard：从新分配空间  
    192.168.224.129:7001：表示重新分配7001所在集群空间  
  
3、给集群节点添加从节点  
需求：给7007master主节点添加一个从节点7008  
注意：一个主节点可以有多个从节点  
前提：7008REDIS服务必须处于启动状态，才能把7008服务添加到集群中  
命令：./redis-trib.rb add-node --slave --master-id 5ff6ce2a43ae37cf3fbf2ec850a8a815df86bab4 192.168.224.129:7008   
  
192.168.224.129:7001  
add-node:添加节点  
\--slave:表示添加的是从节点  
\--master-id：表示添加节点的主节点Id  
192.168.224.129:7008:需求添加的节点  
192.168.224.129:7001：参考节点，表示把7008节点添加到7001所在集群

**如有披露或问题欢迎留言或者入群探讨**

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