一個Redis叢集，至少需要6個節點，3個為主，3個為從。

IP	埠	節點
127.0.0.1	7000	Master
127.0.0.1	7001	Master
127.0.0.1	7002	Master
127.0.0.1	7003	Slave
127.0.0.1	7004	Slave
127.0.0.1	7005	Slave

安裝步驟：

一、下載redis3.0.3

# cd /usr/local

# wget

二、解壓並編譯

# tar -zxvf redis-3.0.3.tar.gz

# cd redis-3.0.3

# make

# make test

# make install

執行make install後，在/usr/local/bin目錄下可看到生成了一些檔案：

# ls /usr/local/bin/

redis-benchmark redis-check-dump redis-sentinel

redis-check-aof redis-cli redis-server

三、建立叢集需要的目錄並複製redis

# mkdir -p /usr/local/cluster

# mkdir -p /usr/local/cluster/7000

# mkdir -p /usr/local/cluster/7001

# mkdir -p /usr/local/cluster/7002

# mkdir -p /usr/local/cluster/7003

# mkdir -p /usr/local/cluster/7004

# mkdir -p /usr/local/cluster/7005

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7000/

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7001/

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7002/

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7003/

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7004/

# cp -rf /usr/local/redis-3.0.3/* /usr/local/cluster/7005/

四、修改配置檔案redis.conf

# vi /usr/local/cluster/7000/redis.conf

修改配置檔案中的下面選項

daemonize yes

port 7000

appendonly yes

cluster-enabled yes

cluster-config-file nodes.conf

cluster-node-timeout 5000

用7000/redis.conf覆蓋7001,7002,7003,7004,7005目錄下的redis.conf

# cp /usr/local/cluster/7001/redis.conf /usr/local/cluster/7001

# cp /usr/local/cluster/7001/redis.conf /usr/local/cluster/7002

# cp /usr/local/cluster/7001/redis.conf /usr/local/cluster/7003

# cp /usr/local/cluster/7001/redis.conf /usr/local/cluster/7004

# cp /usr/local/cluster/7001/redis.conf /usr/local/cluster/7005

再修改7001,7002,7003,7004,7005目錄下的redis.conf中的port，使得redis.conf中的port與其父目錄名稱一致，比如7001/redis.conf中的port為7001，7002/redis.conf中的port為7002

五、啟動6個redis

# cd /usr/local/cluster/7000/src

# redis-server ../redis.conf

# cd /usr/local/cluster/7001/src

# redis-server ../redis.conf

# cd /usr/local/cluster/7002/src

# redis-server ../redis.conf

# cd /usr/local/cluster/7003/src

# redis-server ../redis.conf

# cd /usr/local/cluster/7004/src

# redis-server ../redis.conf

# cd /usr/local/cluster/7005/src

# redis-server ../redis.conf

啟動之後使用命令檢視redis的啟動情況

# ps -ef | grep redis

root 9656 1 0 20:35 ? 00:00:00 redis-server *:7000 [cluster]

root 9684 1 0 20:37 ? 00:00:00 redis-server *:7001 [cluster]

root 9725 1 0 20:43 ? 00:00:00 redis-server *:7002 [cluster]

root 9730 1 0 20:43 ? 00:00:00 redis-server *:7003 [cluster]

root 9734 1 0 20:43 ? 00:00:00 redis-server *:7004 [cluster]

root 9739 1 0 20:43 ? 00:00:00 redis-server *:7005 [cluster]

root 9743 3288 0 20:43 pts/0 00:00:00 grep redis

六、建立redis叢集

1 執行建立redis叢集的命令會報錯，提示找不到ruby

# cd /usr/local/redis-3.0.3/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

/usr/bin/env: ruby: 沒有那個檔案或目錄

解決此錯誤需要安裝ruby，這裡推薦使用yum install ruby

# yum install ruby

2 再執行建立叢集的命令，還會報錯，提示缺少rubygems元件

# ./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

./redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError)

from ./redis-trib.rb:24

解決此錯誤需要安裝rubygems

# yum install rubygems

3 再次執行建立叢集的命令，還會報錯，提示不能載入redis，是因為缺少redis的介面

# ./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

/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- redis (LoadError)

from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'

from ./redis-trib.rb:25

解決此錯誤需要安裝redis

# gem install redis

Successfully installed redis-3.3.3

1 gem installed

Installing ri documentation for redis-3.3.3...

Installing RDoc documentation for redis-3.3.3...

注意，有時候碰到無法安裝的情況，需要手工下載並安裝：

# wget

# gem install -l ./redis-3.3.3.gem

4 再次執行安裝叢集的命令，正常執行

# ./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

>>> Creating cluster

Connecting to node 127.0.0.1:7000: OK

Connecting to node 127.0.0.1:7001: OK

Connecting to node 127.0.0.1:7002: OK

Connecting to node 127.0.0.1:7003: OK

Connecting to node 127.0.0.1:7004: OK

Connecting to node 127.0.0.1:7005: OK

>>> Performing hash slots allocation on 6 nodes...

Using 3 masters:

127.0.0.1:7000

127.0.0.1:7001

127.0.0.1:7002

Adding replica 127.0.0.1:7003 to 127.0.0.1:7000

Adding replica 127.0.0.1:7004 to 127.0.0.1:7001

Adding replica 127.0.0.1:7005 to 127.0.0.1:7002

M: 747467b5f2e2a472afad96de6c88dc2f3bf5b426 127.0.0.1:7000

slots:0-5460 (5461 slots) master

M: 4e4d8ba07d743c4e69fcd5df8867b996084ca4d9 127.0.0.1:7001

slots:5461-10922 (5462 slots) master

M: a6fe3c0a16bcb465a23147de8a3e242deb87e800 127.0.0.1:7002

slots:10923-16383 (5461 slots) master

S: 827ca514f4289dc4ac4d51308721f90851ae6180 127.0.0.1:7003

replicates 747467b5f2e2a472afad96de6c88dc2f3bf5b426

S: be77a6f99e905109150ceaaa50d357ed86803a4c 127.0.0.1:7004

replicates 4e4d8ba07d743c4e69fcd5df8867b996084ca4d9

S: 1285a04f3628c3e76f14d1036c59aef1cb36258d 127.0.0.1:7005

replicates a6fe3c0a16bcb465a23147de8a3e242deb87e800

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 127.0.0.1:7000)

M: 747467b5f2e2a472afad96de6c88dc2f3bf5b426 127.0.0.1:7000

slots:0-5460 (5461 slots) master

M: 4e4d8ba07d743c4e69fcd5df8867b996084ca4d9 127.0.0.1:7001

slots:5461-10922 (5462 slots) master

M: a6fe3c0a16bcb465a23147de8a3e242deb87e800 127.0.0.1:7002

slots:10923-16383 (5461 slots) master

M: 827ca514f4289dc4ac4d51308721f90851ae6180 127.0.0.1:7003

slots: (0 slots) master

replicates 747467b5f2e2a472afad96de6c88dc2f3bf5b426

M: be77a6f99e905109150ceaaa50d357ed86803a4c 127.0.0.1:7004

slots: (0 slots) master

replicates 4e4d8ba07d743c4e69fcd5df8867b996084ca4d9

M: 1285a04f3628c3e76f14d1036c59aef1cb36258d 127.0.0.1:7005

slots: (0 slots) master

replicates a6fe3c0a16bcb465a23147de8a3e242deb87e800

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

至此redis叢集即搭建成功！

七、執行redis-cli命令進入叢集環境

# redis-cli -c -p 7000

127.0.0.1:7000> quit;

#

CentOS6.6安裝Redis3.0.3叢集

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