安装Redis Cluster集群

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1.安装Ruby环境

redis集群需要使用集群管理脚本redis-trib.rb，它的执行相应依赖ruby环境。

• 第一步：安装ruby
  yum install ruby
  yum install rubygems
• 安装ruby和redis的接口程序redis-3.3.5.gem
  gem install redis -v 3.3.5
• 复制redis-3.2.9/src/redis-trib.rb文件到/usr/local/redis-cluster目录
  cp redis-3.2.9/src/redis-trib.rb /usr/local/redis-cluster/ -r

2.安装Redis集群（RedisCluster）

Redis集群最少需要三台主服务器，三台从服务器。
创建7001-7006实例，即拷贝单机版安装时，生成的bin目录，为7001目录。端口号分别为：7001-7006

• 创建7001实例，并编辑redis.conf文件，修改port为7001。
• 编辑redis.conf文件，修改cluster-enable为yes。
• 复制7001，创建7002~7006实例，注意端口修改。
• 启动所有的实例(在各自实例下，执行./redis-server redis.conf)
• 创建Redis集群
  ./redis-trib.rb create --replicas 1 192.168.137.128:7001 192.168.137.128:7002 192.168.137.128:7003 192.168.137.128:7004 192.168.137.128:7005 192.168.137.128:7006

>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.137.128:7001
192.168.137.128:7002
192.168.137.128:7003
Adding replica 192.168.137.128:7004 to 192.168.137.128:7001
Adding replica 192.168.137.128:7005 to 192.168.137.128:7002
Adding replica 192.168.137.128:7006 to 192.168.137.128:7003
M: 0c428a15575be2e5bd794e9e3806576301920ab3 192.168.137.128:7001
   slots:0-5460 (5461 slots) master
M: b6c02a7d48554c6eaccf733c42c90c69507a9e3e 192.168.137.128:7002
   slots:5461-10922 (5462 slots) master
M: 3a631a4d0aacd4cfebc8ba557f06de822a5c0d50 192.168.137.128:7003
   slots:10923-16383 (5461 slots) master
S: 63bfb014482d9bf67e998201470f887c73e3f319 192.168.137.128:7004
   replicates 0c428a15575be2e5bd794e9e3806576301920ab3
S: a01cdd7ea3591148e638fca246794c75bd37c2d2 192.168.137.128:7005
   replicates b6c02a7d48554c6eaccf733c42c90c69507a9e3e
S: 732b8a9d60ceb6e894dcb9ad3add20302412fbf8 192.168.137.128:7006
   replicates 3a631a4d0aacd4cfebc8ba557f06de822a5c0d50
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 192.168.137.128:7001)
M: 0c428a15575be2e5bd794e9e3806576301920ab3 192.168.137.128:7001
   slots:0-5460 (5461 slots) master
   1 additional replica(s)
M: 3a631a4d0aacd4cfebc8ba557f06de822a5c0d50 192.168.137.128:7003
   slots:10923-16383 (5461 slots) master
   1 additional replica(s)
S: 63bfb014482d9bf67e998201470f887c73e3f319 192.168.137.128:7004
   slots: (0 slots) slave
   replicates 0c428a15575be2e5bd794e9e3806576301920ab3
M: b6c02a7d48554c6eaccf733c42c90c69507a9e3e 192.168.137.128:7002
   slots:5461-10922 (5462 slots) master
   1 additional replica(s)
S: 732b8a9d60ceb6e894dcb9ad3add20302412fbf8 192.168.137.128:7006
   slots: (0 slots) slave
   replicates 3a631a4d0aacd4cfebc8ba557f06de822a5c0d50
S: a01cdd7ea3591148e638fca246794c75bd37c2d2 192.168.137.128:7005
   slots: (0 slots) slave
   replicates b6c02a7d48554c6eaccf733c42c90c69507a9e3e
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

3.命令客户端连接集群

指定端口以集群的方式查看登陆：
./redis-cli -p 7001 -c

[root@localhost 7001]# ./redis-cli -p 7001 -c
127.0.0.1:7001> set name yalong
-> Redirected to slot [5798] located at 192.168.137.128:7002
OK
192.168.137.128:7002> get name
"yalong"
192.168.137.128:7002> 

可见，在主节点1登陆设置key值存储到了主节点2中，在其他节点也能获取到value值。