簡要說明
2018年十月 redis 發布了穩定版本的 5.0 版本，推出了各種新特性，其中一點是放棄 ruby的集群方式，改為 使用 c語言編寫的 redis-cli的方式，使集群的構建方式復雜度大大降低。關于集群的更新可以在 Redis5 的版本說明中看到，如下：
The?cluster?manager?was?ported?from?Ruby?(redis-trib.rb)?to?C?code?inside?redis-cli.?check?`redis-cli?--cluster?help?`?for?more?info.
可以查看Redis官網查看集群搭建方式，連接如下
https://redis.io/topics/cluster-tutorial
以下步驟是在一臺 linux 服務器上搭建有6個節點的 Redis集群。
操作步驟
創建目錄
新建目錄：/root/software/redis
下載源碼并解壓編譯
wget?http://download.redis.io/releases/redis-5.0.0.tar.gz tar?xzf?redis-5.0.0.tar.gz cd?redis-5.0.0 make
創建6個Redis配置文件
6個配置文件不能在同一個目錄，此處我們定義如下：
/root/software/redis/redis-cluster-conf/7001/redis.conf /root/software/redis/redis-cluster-conf/7002/redis.conf /root/software/redis/redis-cluster-conf/7003/redis.conf /root/software/redis/redis-cluster-conf/7004/redis.conf /root/software/redis/redis-cluster-conf/7005/redis.conf /root/software/redis/redis-cluster-conf/7006/redis.conf
配置文件的內容為：
port?7001??#端口 cluster-enabled?yes?#啟用集群模式 cluster-config-file?nodes.conf cluster-node-timeout?5000?#超時時間 appendonly?yes daemonize?yes?#后臺運行 protected-mode?no?#非保護模式 pidfile??/var/run/redis_7001.pid
其中 port 和 pidfile 需要隨著 文件夾的不同調增
啟動節點
/root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7001/redis.conf /root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7002/redis.conf /root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7003/redis.conf /root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7004/redis.conf /root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7005/redis.conf /root/software/redis/redis-5.0.0/src/redis-server??/root/software/redis/redis-cluster-conf/7006/redis.conf
啟動集群
/root/software/redis/redis-5.0.0/src/redis-cli?--cluster?create?192.168.2.40:7001?192.168.2.40:7002?192.168.2.40:7003?192.168.2.40:7004?192.168.2.40:7005?192.168.2.40:7006?--cluster-replicas?1
啟動后，可看到成功信息，如下：
>>>?Performing?hash?slots?allocation?on?6?nodes... Master[0]?->?Slots?0?-?5460 Master[1]?->?Slots?5461?-?10922 Master[2]?->?Slots?10923?-?16383 Adding?replica?192.168.2.40:7004?to?192.168.2.40:7001 Adding?replica?192.168.2.40:7005?to?192.168.2.40:7002 Adding?replica?192.168.2.40:7006?to?192.168.2.40:7003 >>>?Trying?to?optimize?slaves?allocation?for?anti-affinity [WARNING]?Some?slaves?are?in?the?same?host?as?their?master M:?191c645200a8b4d267f71e3354c8248dbb533dde?192.168.2.40:7001 ???slots:[0-5460]?(5461?slots)?master M:?400a08d4e5a534c1b609988105d3e045395fbd12?192.168.2.40:7002 ???slots:[5461-10922]?(5462?slots)?master M:?684f6aa0fbccda295ce6818a8c01ee7255a7b002?192.168.2.40:7003 ???slots:[10923-16383]?(5461?slots)?master S:?f2701549ae98315b432d73b49d139ee77d5685b4?192.168.2.40:7004 ???replicates?684f6aa0fbccda295ce6818a8c01ee7255a7b002 S:?9fdc1e375436767ab815cbddd3df674f3bc2ca99?192.168.2.40:7005 ???replicates?191c645200a8b4d267f71e3354c8248dbb533dde S:?e7742888ed85b37cff4a98e861e99bb16e8bae2c?192.168.2.40:7006 ???replicates?400a08d4e5a534c1b609988105d3e045395fbd12 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?192.168.2.40:7001) M:?191c645200a8b4d267f71e3354c8248dbb533dde?192.168.2.40:7001 ???slots:[0-5460]?(5461?slots)?master ???1?additional?replica(s) M:?684f6aa0fbccda295ce6818a8c01ee7255a7b002?192.168.2.40:7003 ???slots:[10923-16383]?(5461?slots)?master ???1?additional?replica(s) S:?9fdc1e375436767ab815cbddd3df674f3bc2ca99?192.168.2.40:7005 ???slots:?(0?slots)?slave ???replicates?191c645200a8b4d267f71e3354c8248dbb533dde S:?e7742888ed85b37cff4a98e861e99bb16e8bae2c?192.168.2.40:7006 ???slots:?(0?slots)?slave ???replicates?400a08d4e5a534c1b609988105d3e045395fbd12 M:?400a08d4e5a534c1b609988105d3e045395fbd12?192.168.2.40:7002 ???slots:[5461-10922]?(5462?slots)?master ???1?additional?replica(s) S:?f2701549ae98315b432d73b49d139ee77d5685b4?192.168.2.40:7004 ???slots:?(0?slots)?slave ???replicates?684f6aa0fbccda295ce6818a8c01ee7255a7b002 [OK]?All?nodes?agree?about?slots?configuration. >>>?Check?for?open?slots... >>>?Check?slots?coverage... [OK]?All?16384?slots?covered.
至此，Reids集群搭建完成。
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