redis 集群搭建环境
1、使用ruby脚本搭建集群。需要ruby的运行环境。
安装ruby：
yum install ruby
yum install rubygems
2、上传redis-3.0.0.gem到 linux中
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3、安装ruby运行时所使用的包
[root@localhost ~]# gem install redis-3.0.0.gem
Successfully installed redis-3.0.0
1 gem installed
Installing ri documentation for redis-3.0.0...
Installing RDoc documentation for redis-3.0.0...
[root@localhost ~]#
查看redis-trib.rb 脚本所在的目录：
[root@localhost ~]# cd redis-3.0.0/src
[root@localhost src]# ll *.rb
-rwxrwxr-x. 1 root root 48141 Apr 1 2015 redis-trib.rb
7.2.2. 搭建步骤
需要6台redis服务器。搭建伪分布式。
需要6个redis实例。彻底
需要运行在不同的端口7001-7006
使用之前搭建好的redis实例 。
注意：搭建前 如果节点里有数据，需要删除（rdb文件，aof文件）。
第一步：创建6个redis实例，每个实例运行在不同的端口。需要修改redis.conf配置文件。配置文件中还需要把cluster-enabled yes前的注释去掉。
Ø 创建目录：
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[root@localhost local]# mkdir redis-cluster
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Ø copy 之前搭建好的redis 并改名为redis01
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[root@localhost local]# cp redis/ redis-cluster/redis01 -r
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Ø 进入redis-cluster目录中cd到redis01的bin目录，删除数据文件
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[root@localhost local]# cd redis-cluster/redis01/bin
[root@localhost bin]# rm -rf *.rdb *.aof
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Ø 修改redis.conf,取消注释,如图
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[root@localhost bin]# vim redis.conf
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按ESC :wq
保存退出。
Ø cd到redis-cluster目录
Ø copy六份并分别命名为redis02,redis03,redis04,redis05,redis06
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[root@localhost redis-cluster]# cp redis01 redis02 -r
[root@localhost redis-cluster]# cp redis01 redis03 -r
[root@localhost redis-cluster]# cp redis01 redis04 -r
[root@localhost redis-cluster]# cp redis01 redis05 -r
[root@localhost redis-cluster]# cp redis01 redis06 -r
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Ø cd到每一个实例的bin目录，修改每一个redis实例的端口分别改为7001-7006
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[root@localhost bin]# vim redis.conf
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第二步：启动每个redis实例。
vim redis-cluster-start-all.sh
添加如下文字到文件中：
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cd /usr/local/redis-cluster/redis01/bin
./redis-server redis.conf
cd /usr/local/redis-cluster/redis02/bin
./redis-server redis.conf
cd /usr/local/redis-cluster/redis03/bin
./redis-server redis.conf
cd /usr/local/redis-cluster/redis04/bin
./redis-server redis.conf
cd /usr/local/redis-cluster/redis05/bin
./redis-server redis.conf
cd /usr/local/redis-cluster/redis06/bin
./redis-server redis.conf
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Ø 修改文件：redis-cluster-start-all.sh 的权限，让其可执行。
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chmod u+x redis-cluster-start-all.sh
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Ø 执行启动
[root@localhost redis-cluster]# ./redis-cluster-start-all.sh
第三步：使用ruby脚本搭建集群。
Ø 从解压目录下的src下的拷贝redis-trib.rb文件到redis-cluster目录中
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Ø 执行创建：
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./redis-trib.rb create --replicas 1 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006
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[root@localhost redis-cluster]# ./redis-trib.rb create --replicas 1 192.168.25.153:7001 192.168.25.153:7002 192.168.25.153:7003 192.168.25.153:7004 192.168.25.153:7005 192.168.25.153:7006
>>> Creating cluster
Connecting to node 192.168.25.153:7001: OK
Connecting to node 192.168.25.153:7002: OK
Connecting to node 192.168.25.153:7003: OK
Connecting to node 192.168.25.153:7004: OK
Connecting to node 192.168.25.153:7005: OK
Connecting to node 192.168.25.153:7006: OK
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.25.153:7001
192.168.25.153:7002
192.168.25.153:7003
Adding replica 192.168.25.153:7004 to 192.168.25.153:7001
Adding replica 192.168.25.153:7005 to 192.168.25.153:7002
Adding replica 192.168.25.153:7006 to 192.168.25.153:7003
M: 2e48ae301e9c32b04a7d4d92e15e98e78de8c1f3 192.168.25.153:7001
slots:0-5460 (5461 slots) master
M: 8cd93a9a943b4ef851af6a03edd699a6061ace01 192.168.25.153:7002
slots:5461-10922 (5462 slots) master
M: 2935007902d83f20b1253d7f43dae32aab9744e6 192.168.25.153:7003
slots:10923-16383 (5461 slots) master
S: 74f9d9706f848471583929fc8bbde3c8e99e211b 192.168.25.153:7004
replicates 2e48ae301e9c32b04a7d4d92e15e98e78de8c1f3
S: 42cc9e25ebb19dda92591364c1df4b3a518b795b 192.168.25.153:7005
replicates 8cd93a9a943b4ef851af6a03edd699a6061ace01
S: 8b1b11d509d29659c2831e7a9f6469c060dfcd39 192.168.25.153:7006
replicates 2935007902d83f20b1253d7f43dae32aab9744e6
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 192.168.25.153:7001)
M: 2e48ae301e9c32b04a7d4d92e15e98e78de8c1f3 192.168.25.153:7001
slots:0-5460 (5461 slots) master
M: 8cd93a9a943b4ef851af6a03edd699a6061ace01 192.168.25.153:7002
slots:5461-10922 (5462 slots) master
M: 2935007902d83f20b1253d7f43dae32aab9744e6 192.168.25.153:7003
slots:10923-16383 (5461 slots) master
M: 74f9d9706f848471583929fc8bbde3c8e99e211b 192.168.25.153:7004
slots: (0 slots) master
replicates 2e48ae301e9c32b04a7d4d92e15e98e78de8c1f3
M: 42cc9e25ebb19dda92591364c1df4b3a518b795b 192.168.25.153:7005
slots: (0 slots) master
replicates 8cd93a9a943b4ef851af6a03edd699a6061ace01
M: 8b1b11d509d29659c2831e7a9f6469c060dfcd39 192.168.25.153:7006
slots: (0 slots) master
replicates 2935007902d83f20b1253d7f43dae32aab9744e6
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
[root@localhost redis-cluster]#
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第四步 创建关闭集群的脚本：（不是必须的）
首先使用:vim 命令创建一个文件 redis-cluster-stop-all.sh
编辑文件，添加如下：
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cd /usr/local/redis-cluster/redis01/bin
./redis-cli -p 7001 shutdown
cd /usr/local/redis-cluster/redis02/bin
./redis-cli -p 7002 shutdown
cd /usr/local/redis-cluster/redis03/bin
./redis-cli -p 7003 shutdown
cd /usr/local/redis-cluster/redis04/bin
./redis-cli -p 7004 shutdown
cd /usr/local/redis-cluster/redis05/bin
./redis-cli -p 7005 shutdown
cd /usr/local/redis-cluster/redis06/bin
./redis-cli -p 7006 shutdown
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修改文件：redis-cluster-stop-all.sh 的权限，让其可执行。
chmod u+x redis-cluster-stop-all.sh
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7.3. 集群的使用方法
Redis-cli连接集群。
[root@localhost redis-cluster]# redis01/bin/redis-cli -p 7002 -c
-c：代表连接的是redis集群
使用命令操作redis是和单机版的一样。
下面是我操作的命令截图
yum install ruby
yum install rubygems
tar -xvf redis-3.2.12.tar.gz
开启集群 cd /usr/local/redis-cluster/redis01
redis-server ./redis.conf
cd /usr/local/redis-cluster/redis02
redis-server ./redis.conf
cd /usr/local/redis-cluster/redis03
redis-server ./redis.conf
cd /usr/local/redis-cluster/redis04
redis-server ./redis.conf
cd /usr/local/redis-cluster/redis05
redis-server ./redis.conf
cd /usr/local/redis-cluster/redis06
redis-server ./redis.conf
进入集群 redis-cli -p 7001 -c 重点：集群一定加-c
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