集群简介

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redis集群结构设计

数据存储设计

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集群内部通讯设计

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最多找两次就能找到！

redis集群(cluster)结构搭建

集群结构

配置服务器（3主3从）
建立通信（Meet）
分槽（Slot）
搭建主从（master-slave）

Cluster配置

6个节点全配置
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开启集群

redis-cli -a 1234 --cluster create 192.168.135.10:6371 192.168.135.10:6372 192.168.135.10:6373 192.168.135.11:6374 192.168.135.11:6375 192.168.135.11:6376 --cluster-replicas 1

–cluster-replicas 1 ：表示一个master连一个slave，如果改成–cluster-replicas 2表示一个master连2个slave

root@centos8:/usr/local/bin# redis-cli -a 1234 --cluster create 192.168.135.10:6371 192.168.135.10:6372 192.168.135.10:6373 192.168.135.11:
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 192.168.135.11:6376 to 192.168.135.10:6371
Adding replica 192.168.135.10:6373 to 192.168.135.11:6374
Adding replica 192.168.135.11:6375 to 192.168.135.10:6372
M: 8fa990153bfb999537769c06ce7a65390e816294 192.168.135.10:6371
   slots:[0-5460] (5461 slots) master
M: 8996717269b57ca3656a594e615e1258f5ee7833 192.168.135.10:6372
   slots:[10923-16383] (5461 slots) master
S: 4435a05753efbf883e08e8019866f0e0534dcbc3 192.168.135.10:6373
   replicates 31b753b0fe52e0196e8a33149d11a82fdfafdad0
M: 31b753b0fe52e0196e8a33149d11a82fdfafdad0 192.168.135.11:6374
   slots:[5461-10922] (5462 slots) master
S: b47f12ca63f08daedc5c97704811a7207992fd70 192.168.135.11:6375
   replicates 8996717269b57ca3656a594e615e1258f5ee7833
S: 089b98bebcf054c39c6eadab31741529ead62268 192.168.135.11:6376
   replicates 8fa990153bfb999537769c06ce7a65390e816294
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 192.168.135.10:6371)
M: 8fa990153bfb999537769c06ce7a65390e816294 192.168.135.10:6371
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: 089b98bebcf054c39c6eadab31741529ead62268 192.168.135.11:6376
   slots: (0 slots) slave
   replicates 8fa990153bfb999537769c06ce7a65390e816294
S: b47f12ca63f08daedc5c97704811a7207992fd70 192.168.135.11:6375
   slots: (0 slots) slave
   replicates 8996717269b57ca3656a594e615e1258f5ee7833
S: 4435a05753efbf883e08e8019866f0e0534dcbc3 192.168.135.10:6373
   slots: (0 slots) slave
   replicates 31b753b0fe52e0196e8a33149d11a82fdfafdad0
M: 8996717269b57ca3656a594e615e1258f5ee7833 192.168.135.10:6372
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
M: 31b753b0fe52e0196e8a33149d11a82fdfafdad0 192.168.135.11:6374
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.