環境：
這里參考官方使用一台服務器：Centos 7 redis-5.0.4 192.168.10.10
redis集群cluster最少要3個主節點，所以本次需要創建6個實例：3個主節點，3個從節點。
1、創建cluster工作目錄
[root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/{7000,7001,7002,7003,7004,7005}
2、創建cluster的配置文件
[root@localhost ~]# cd /opt/redis-5.0.4/cluster-test/ [root@localhost cluster-test]# vim 7000/redis.conf port 7000 // 端口號 daemonize yes // 開啟守護進程 dir "/opt/redis-5.0.4/cluster-test/data" // 集群的工作目錄 logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7000.log" // 日志文件 dbfilename "dump-7000.rdb" cluster-enabled yes // 啟用集群功能 cluster-config-file nodes-7000.conf // 集群配置文件的名字 cluster-require-full-coverage no // #redis cluster需要16384個slot都正常的時候才能對外提供服務，換句話說，只要任何一個slot異常那么整個cluster不對外提供服務。 因此生產環境一般為no cluster-node-timeout 5000 //請求超時 默認15秒，可自行設置 appendonly yes //aof日志開啟 有需要就開啟，它會每次寫操作都記錄一條日志
由於這6個實例的配置文件除了端口以外基本相同。所以我們將redis.conf分別復制一份到剩下的7001、7002、7003、7004、7005的目錄下然后修改對應的端口。
最終的配置文件看起來向下面這樣
[root@localhost cluster-test]# vim 7000/redis.conf port 7000 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7000.log" dbfilename "dump-7000.rdb" cluster-enabled yes cluster-config-file nodes-7000.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes --------------------------------------------------------------------- [root@localhost cluster-test]# vim 7001/redis.conf port 7001 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7001.log" dbfilename "dump-7001.rdb" cluster-enabled yes cluster-config-file nodes-7001.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes ------------------------------------------------------------------------ [root@localhost cluster-test]# vim 7002/redis.conf port 7002 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7002.log" dbfilename "dump-7002.rdb" cluster-enabled yes cluster-config-file nodes-7002.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes ------------------------------------------------------------------------ [root@localhost cluster-test]# vim 7003/redis.conf port 7003 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7003.log" dbfilename "dump-7003.rdb" cluster-enabled yes cluster-config-file nodes-7003.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes ------------------------------------------------------------------------ [root@localhost cluster-test]# vim 7004/redis.conf port 7004 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7004.log" dbfilename "dump-7004.rdb" cluster-enabled yes cluster-config-file nodes-7004.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes ------------------------------------------------------------------------ [root@localhost cluster-test]# vim 7005/redis.conf port 7005 daemonize yes dir "/opt/redis-5.0.4/cluster-test/data" logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7005.log" dbfilename "dump-7005.rdb" cluster-enabled yes cluster-config-file nodes-7005.conf cluster-require-full-coverage no cluster-node-timeout 5000 appendonly yes
創建好配置文件，在創建對應的cluster工作目錄和日志文件目錄
[root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/data [root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/log
3、運行集群
這里需要注意：
如果你使用的是Redis 5，我們可以使用redis-cli中的Redis集群命令行實用程序來創建新的集群、檢查或重新分割現有集群，等等。
對於Redis版本3或4，需要使用redis-trib。可以在Redis源代碼發行版的src目錄中找到它。需要安裝redis gem才能運行redis-trib，而gem需要reby環境，所以需要安裝reby
如果是redis版本5以下的請按照下面安裝reby環境和redis.gem。
3.1安裝reby環境
[root@localhost cluster-test]# wget -P /opt/source https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.1.tar.gz
[root@localhost cluster-test]# tar -zxvf /opt/source/ruby-2.3.1.tar.gz -C /opt/
[root@localhost cluster-test]# cd /opt/ruby-2.3.1/
[root@localhost ruby-2.3.1]# ./configure --prefix=/opt/ruby231
[root@localhost ruby-2.3.1]# make && make install
[root@localhost bin]# vim /etc/profile // 添加環境變量
PATH="/opt/python362/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/opt/tngx230/sbin:/opt/node-v8.6.0-linux-x64/bin:/opt/ruby231/bin"
[root@localhost src]# cp /opt/ruby231/bin/ruby /usr/local/ // redis-trib.rb會到這里去找reby
[root@localhost src]# cp /opt/ruby231/bin/gem /usr/local/
[root@localhost bin]# source /etc/profile // 使配置立即生效
3.2安裝redis.gem
[root@localhost ~]# gem install redis
3.3開啟redis實例
[root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7000/redis.conf [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7001/redis.conf [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7002/redis.conf [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7003/redis.conf [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7004/redis.conf [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7005/redis.conf
開啟成功后，看起來像下面這樣：
3.3運行集群
[root@localhost src]# ./redis-trib.rb create --replicas 1 127.0.0.1:7000 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
如果是redis5.0以上版本會有如下提示信息：
對於3或4版本的盆友，我也就只能走到這里了，下面我將以5.0版本進行操作。
4、運行集群
[root@localhost src]# 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
命令執行成功后，會看到如下界面：
輸入yes根據上面的配置進行設置開啟集群，集群開啟成功后如下所示：
5、查看集群狀態
redis-cli -p 7000 cluster info // 查看節點詳細信息 redis-cli -p 7000 cluster nodes // 查看所有節點 redis-cli -p 7000 cluster nodes | grep master // 過濾出主節點 redis-cli -p 7000 cluster nodes | grep slave // 過濾出從節點
6、驗證集群
開兩個shell登陸redis實例
[root@localhost ~]# redis-cli -c -p 7000 // 登陸7000的實例 [root@localhost ~]# redis-cli -c -p 7003 // 登陸7003的實例
--------------------------------------------------------------------------------到此redis集群就算簡單的實現了-----------------------------------------------------------------
參考文檔：https://redis.io/topics/cluster-tutorial