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Redis cluster 集群

原创 NoSQL 作者:dmcatding 时间:2019-04-12 13:49:47 0 删除 编辑

##配置redis集群需要至少6个redis节点

集群至少3主3从才可以搭建,防止错乱我们在redis 下建立一个文件夹cluster,里面复制6份配置文件,改名为redis1-redis6.conf


把每个配置文件都修改以下共同点:

bind 10.233.19.36 (根据实际情况配置)

port 7001 (7001-7006)

daemonize yes(以守护进程运行)

pidfile /var/run/redis.pid (守护进程生成的文件,以实际情况配置)

appendonly yes (开启AOF日志记录Redis操作的持久化)

appendfilename "appendonly-7001.aof" (AOF文件名,配置端口为文件名便于查看)

cluster-enabled yes (开启集群)

cluster-config-file nodes-7001.conf (节点信息,已节点命名便于查看)

cluster-node-timeout 15000 (节点响应超时时间)

以上为共同点每个节点不论主从都需要配置。

此外还需要注意,不要再为各个节点主动配置主从关系,否则启动时会报错。

因为主从关系要给redis集群自己调节。




##启动redis集群

上面的配置完成之后,分别启动6个redis实例。配置正确的情况下,都可以启动成功。然后运行如下命令创建集群:



注意,这里使用的是ip:port   

replicas   1 表示我们希望为集群中的每个主节点创建一个从节点

因为配置文件中设置了密码所以创建集群也需要加密码参数 -a

[ERR] Node 10.233.19.36:6380 NOAUTH Authentication required.


[redis@weblogic-test bin]$ ./redis-cli --cluster create 10.233.19.36:6380 10.233.19.36:6381 10.233.19.36:6382 10.233.19.36:6383 10.233.19.36:6384 10.233.19.36:6385 --cluster-replicas 1 -a beijing

Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

>>> Performing hash slots allocation on 6 nodes...

Master[0] -> Slots 0 - 5460

Master[1] -> Slots 5461 - 10922

Master[2] -> Slots 10923 - 16383

Adding replica 10.233.19.36:6383 to 10.233.19.36:6380

Adding replica 10.233.19.36:6384 to 10.233.19.36:6381

Adding replica 10.233.19.36:6385 to 10.233.19.36:6382

>>> Trying to optimize slaves allocation for anti-affinity

[WARNING] Some slaves are in the same host as their master

M: 369151e4f1bed1e3fcaf474025853bc72056542e 10.233.19.36:6380

   slots:[0-5460] (5461 slots) master

M: 1f9314f13a22c2c68c609e98247bfe6d0714c75b 10.233.19.36:6381

   slots:[5461-10922] (5462 slots) master

M: 41840a493fceef875b1a521d951090f9c99c7040 10.233.19.36:6382

   slots:[10923-16383] (5461 slots) master

S: 438c5ecaf7501da25bfc0d2055445c036907ba61 10.233.19.36:6383

   replicates 1f9314f13a22c2c68c609e98247bfe6d0714c75b

S: 9598769e90155aeb130a33980ac1a1c27b1609cc 10.233.19.36:6384

   replicates 41840a493fceef875b1a521d951090f9c99c7040

S: b0d325e936ee5055648561302560d055d0bdb365 10.233.19.36:6385

   replicates 369151e4f1bed1e3fcaf474025853bc72056542e

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 10.233.19.36:6380)

M: 369151e4f1bed1e3fcaf474025853bc72056542e 10.233.19.36:6380

   slots:[0-5460] (5461 slots) master

   1 additional replica(s)

M: 1f9314f13a22c2c68c609e98247bfe6d0714c75b 10.233.19.36:6381

   slots:[5461-10922] (5462 slots) master

   1 additional replica(s)

S: 9598769e90155aeb130a33980ac1a1c27b1609cc 10.233.19.36:6384

   slots: (0 slots) slave

   replicates 41840a493fceef875b1a521d951090f9c99c7040

M: 41840a493fceef875b1a521d951090f9c99c7040 10.233.19.36:6382

   slots:[10923-16383] (5461 slots) master

   1 additional replica(s)

S: b0d325e936ee5055648561302560d055d0bdb365 10.233.19.36:6385

   slots: (0 slots) slave

   replicates 369151e4f1bed1e3fcaf474025853bc72056542e

S: 438c5ecaf7501da25bfc0d2055445c036907ba61 10.233.19.36:6383

   slots: (0 slots) slave

   replicates 1f9314f13a22c2c68c609e98247bfe6d0714c75b

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.



执行成功之后,连接一台redis,执行 cluster info 会看到类似如下信息:


127.0.0.1:6380> 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_ping_sent:190

cluster_stats_messages_pong_sent:181

cluster_stats_messages_sent:371

cluster_stats_messages_ping_received:176

cluster_stats_messages_pong_received:190

cluster_stats_messages_meet_received:5

cluster_stats_messages_received:371


我们可以看到cluster_state:ok,cluster_slots_ok:16384,cluster_size:3。


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