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这篇文章主要介绍 CentOS6.6 如何安装 Redis3.0.3 集群，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
一个 Redis 集群，至少需要 6 个节点，3 个为主，3 个为从。
IP
端口
节点
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
安装步骤：
一、下载 redis3.0.3
# cd /usr/local
# wget http://download.redis.io/releases/redis-3.0.3.tar.gz
二、解压并编译
# tar -zxvf
redis-3.0.3.tar.gz
# cd redis-3.0.3
# make
# make test
# make install
执行 make install 后，在 /usr/local/bin 目录下可看到生成了一些文件：
# ls
/usr/local/bin/
redis-benchmark redis-check-dump redis-sentinel
redis-check-aof redis-cli redis-server
三、创建集群需要的目录并拷贝 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、修改配置文件 redis.conf
# vi
/usr/local/cluster/7000/redis.conf
修改配置文件中的下面选项
daemonize yes
port 7000
appendonly yes
cluster-enabled
yes
cluster-config-file
nodes.conf
cluster-node-timeout
5000
用 7000/redis.conf 覆盖 7001,7002,7003,7004,7005 目录下的 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 目录下的 redis.conf 中的 port，使得 redis.conf 中的 port 与其父目录名称一致，比如 7001/redis.conf 中的 port 为 7001，7002/redis.conf 中的 port 为 7002
五、启动 6 个 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
启动之后使用命令查看 redis 的启动情况
# 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、创建 redis 集群
1 执行创建 redis 集群的命令会报错，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: 没有那个文件或目录
解决此错误需要安装 ruby，这里推荐使用 yum install ruby
# yum install
ruby
2 再执行创建集群的命令，还会报错，提示缺少 rubygems 组件
#
./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
解决此错误需要安装 rubygems
# yum install
rubygems
3 再次执行创建集群的命令，还会报错，提示不能加载 redis，是因为缺少 redis 的接口
#
./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
解决此错误需要安装 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，有时候碰到无法安装的情况，需要手工下载并安装：
# wget
https://rubygems.global.ssl.fastly.net/gems/redis-3.3.3.gem
# gem install
-l ./redis-3.3.3.gem
4 再次执行安装集群的命令，正常执行
#
./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 集群即搭建成功！
七、执行 redis-cli 命令进入集群环境
# redis-cli -c
-p 7000
127.0.0.1:7000
quit;
#
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