第三部分：多机数据库的实现:集群

Ubuntu16.04 配置redis cluster环境(自己测试用)
参考：必看
redis cluster相关命令

1. redis 6379节点的配置文件（其他节点的配置文件对应端口,文件名改一下就行）

   pidfile "/home/xiaocai/software/redis/logs/redis-6379.pid"
   port 6379
   tcp-backlog 511
   bind 0.0.0.0
   timeout 0
   tcp-keepalive 60
   loglevel notice
   dbfilename "dump-6379.rdb"
   cluster-config-file nodes-6379.conf
   cluster-enabled yes
   

2. 启动redis节点

   sudo ./redis-server conf/redis-6379.conf
   sudo ./redis-server conf/redis-6380.conf
   sudo ./redis-server conf/redis-6381.conf
   

3. 添加redis节点 cluster meet ip port 查看redis 节点 cluster nodes

   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6379
   127.0.0.1:6379> ping
   PONG
   127.0.0.1:6379> cluster meet 127.0.0.1 6380
   OK
   127.0.0.1:6379> cluster nodes
   d9637573e904a5c6453e8358873ce3ce07a3160d 127.0.0.1:6380@16380 master - 0 1576803897321 1 connected
   fdef4d5b42fc0e40f0c9a374f78bfa0c8eb67926 127.0.0.1:6379@16379 myself,master - 0 0 0 connected
   

   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6380
   127.0.0.1:6380> cluster nodes
   d9637573e904a5c6453e8358873ce3ce07a3160d 127.0.0.1:6380@16380 myself,master - 0 0 1 connected
   fdef4d5b42fc0e40f0c9a374f78bfa0c8eb67926 127.0.0.1:6379@16379 master - 0 1576803999852 0 connected
   127.0.0.1:6380> 
   127.0.0.1:6380> 
   127.0.0.1:6380> cluster meet 127.0.0.1 6381
   OK
   127.0.0.1:6380> cluster nodes
   6dcb562bcd93258c8b946adf595b11db4b9c1262 127.0.0.1:6381@16381 master - 0 1576804047235 2 connected
   d9637573e904a5c6453e8358873ce3ce07a3160d 127.0.0.1:6380@16380 myself,master - 0 0 1 connected
   fdef4d5b42fc0e40f0c9a374f78bfa0c8eb67926 127.0.0.1:6379@16379 master - 0 1576804046228 0 connected
   127.0.0.1:6380> 
   

4. 槽指派cluster addslots slot …
   查看当前集群状态，可见未上线cluster_state:fail

   127.0.0.1:6380> cluster info
   cluster_state:fail
   cluster_slots_assigned:0
   cluster_slots_ok:0
   cluster_slots_pfail:0
   cluster_slots_fail:0
   cluster_known_nodes:3
   cluster_size:0
   cluster_current_epoch:2
   cluster_my_epoch:1
   cluster_stats_messages_ping_sent:325
   cluster_stats_messages_pong_sent:327
   cluster_stats_messages_meet_sent:1
   cluster_stats_messages_sent:653
   cluster_stats_messages_ping_received:326
   cluster_stats_messages_pong_received:326
   cluster_stats_messages_meet_received:1
   cluster_stats_messages_received:653
   

   参考：添加槽指派，书上写的不对，试过了不行，网上查的资料
   redis-cli -h 服务器IP -p 端口号 cluster addslots {0…5460}

   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6379 cluster addslots {0..5000}
   OK
   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6379
   127.0.0.1:6379> cluster nodes
   6dcb562bcd93258c8b946adf595b11db4b9c1262 127.0.0.1:6381@16381 master - 0 1576808600699 2 connected
   fdef4d5b42fc0e40f0c9a374f78bfa0c8eb67926 127.0.0.1:6379@16379 myself,master - 0 1576808601000 0 connected 0-5000
   d9637573e904a5c6453e8358873ce3ce07a3160d 127.0.0.1:6380@16380 master - 0 1576808601710 1 connected
   127.0.0.1:6379> quit
   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6380 cluster addslots {5001..10000}
   OK
   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6380 cluster addslots {10000..16383}
   (error) ERR Slot 10000 is already busy
   xiaocai@ubuntu:~/software/redis$ ./redis-cli -p 6380 cluster addslots {10001..16383}
   OK
   

   再次查看cluster 状态，显示已上线cluster_state:ok

   127.0.0.1:6379> 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:2
   cluster_current_epoch:2
   cluster_my_epoch:0
   cluster_stats_messages_ping_sent:1761
   cluster_stats_messages_pong_sent:1452
   cluster_stats_messages_sent:3213
   cluster_stats_messages_ping_received:1452
   cluster_stats_messages_pong_received:1526
   cluster_stats_messages_received:2978
   

5. 以集群模式的redis-cli连接集群

   xiaocai@ubuntu:~/software/redis$ ./redis-cli -c -p 6379
   127.0.0.1:6379> get x
   -> Redirected to slot [16287] located at 127.0.0.1:6380
   "a" 
   

来源：CSDN

作者：crazy_xiaocai

链接：https://blog.csdn.net/weixin_42752585/article/details/103626580