Redis-Cluster集群创建内部细节详解
版权声明 本站原创文章 由 萌叔 发表 转载请注明 萌叔 | http://vearne.cc 本文基于redis 6.2.7 1.引言 Redis-Cluster集群的搭建非常简单。搭建过程见参考资料1。 执行 redis-cli --cluster create 127.0.0.1:7000 127.0.0.1:7001 \ 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 \ --cluster-replicas 1 root@BJ-02:~/cluster-test# redis-cli --cluster create 127.0.0.1:7000 127.0.0.1:7001 \ > 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 \ > --cluster-replicas 1 >>> Performing hash slots allocation on 6 nodes... Master[0] -> Slots 0 - 5460 Master[1] -> Slots 5461 - 10922 Master[2] -> Slots 10923 - 16383 Adding replica 127.0.0.1:7004 to 127.0.0.1:7000 Adding replica 127.0.0.1:7005 to 127.0.0.1:7001 Adding replica 127.0.0.1:7003 to 127.0.0.1:7002 >>> Trying to optimize slaves allocation for anti-affinity [WARNING] Some slaves are in the same host as their master M: 7eb7ceb4d886580c6d122e7fd92e436594cc105e 127.0.0.1:7000 slots:[0-5460] (5461 slots) master M: 784fa4b720213b0e2b51a4542469f5e318e8658b 127.0.0.1:7001 slots:[5461-10922] (5462 slots) master M: 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 127.0.0.1:7002 slots:[10923-16383] (5461 slots) master S: 603a8a403536f625f53467881f5f78def9bd46e5 127.0.0.1:7003 replicates 784fa4b720213b0e2b51a4542469f5e318e8658b S: 585c7df69fb267941a40611bbd8ed90349b49175 127.0.0.1:7004 replicates 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 S: be905740b96469fc6f20339fc9898e153c06d497 127.0.0.1:7005 replicates 7eb7ceb4d886580c6d122e7fd92e436594cc105e 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 127.0.0.1:7000) M: 7eb7ceb4d886580c6d122e7fd92e436594cc105e 127.0.0.1:7000 slots:[0-5460] (5461 slots) master 1 additional replica(s) M: 784fa4b720213b0e2b51a4542469f5e318e8658b 127.0.0.1:7001 slots:[5461-10922] (5462 slots) master 1 additional replica(s) M: 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 127.0.0.1:7002 slots:[10923-16383] (5461 slots) master 1 additional replica(s) S: 585c7df69fb267941a40611bbd8ed90349b49175 127.0.0.1:7004 slots: (0 slots) slave replicates 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 S: be905740b96469fc6f20339fc9898e153c06d497 127.0.0.1:7005 slots: (0 slots) slave replicates 7eb7ceb4d886580c6d122e7fd92e436594cc105e S: 603a8a403536f625f53467881f5f78def9bd46e5 127.0.0.1:7003 slots: (0 slots) slave replicates 784fa4b720213b0e2b51a4542469f5e318e8658b [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. 验证 root@BJ-02:~# redis-cli -h 127.0.0.1 -p 7000 127.0.0.1:7000> cluster nodes 784fa4b720213b0e2b51a4542469f5e318e8658b 127.0.0.1:7001@17001 master - 0 1652672999293 2 connected 5461-10922 7eb7ceb4d886580c6d122e7fd92e436594cc105e 127.0.0.1:7000@17000 myself,master - 0 1652672998000 1 connected 0-5460 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 127.0.0.1:7002@17002 master - 0 1652673000333 3 connected 10923-16383 585c7df69fb267941a40611bbd8ed90349b49175 127.0.0.1:7004@17004 slave 4e0e4be1b4afd2cd1d10166a6788449dd812a4c0 0 1652673000126 3 connected be905740b96469fc6f20339fc9898e153c06d497 127.0.0.1:7005@17005 slave 7eb7ceb4d886580c6d122e7fd92e436594cc105e 0 1652673001373 1 connected 603a8a403536f625f53467881f5f78def9bd46e5 127.0.0.1:7003@17003 slave 784fa4b720213b0e2b51a4542469f5e318e8658b 0 1652673000000 2 connected 一行命令就完成了集群的部署，redis-cli --cluster create到底做了什么。这篇文章萌叔将带你探寻其中的秘密。 ...