redis集群搭建小结

redis高版本使用ruby实现了集群,所以需要ruby环境,安装ruby环境和redis的gem接口后,就可以使用redis的redis-trib.rb脚本创建集群。

先列一下大的步骤。

1.修改配置文件,启动多个redis实例。

 

2.安装ruby、rubygems、redis ruby接口。

安装gem 需要ruby的版本在 1.8.7 以上,默认的centos5 上都是1.8.5 版本,所以首先你的升级你的ruby

 

3.gem 安装redis ruby 接口

 

4.redis-trib.rb脚本创建集群

 

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本人使用两台桥接的虚拟机进行了分布式集群的搭建,系统为centos5。

具体操作过程:

1.修改配置文件,启动多个redis实例。

下载redis3.0以上版本

tar zxf 解压

make&&make install 安装

创建单独目录,我是mkdir /usr/local/cluster ,再在其下创建目录 7000、7001、7002、7003

 

将redis.conf分别拷贝到这几个目录下面,并分别修改redis.conf 中的端口号port和目录名一致。

daemonize修改为yes后台启动,daemonize yes

启动4个实例

cd /usr/local/cluster

cd 7000

redis-server redis.conf

cd ../7001

redis-server redis.conf

如上把7002 7003也启动起来

 

然后在另一台虚拟机下创建 9000 9001 两个目录也按上面的redis-server redis.conf方法分别启动。

ps -ef|grep redis 看下是否都启动起来了

[root@localhost ~]# ps -ef|grep redis

root     10957     1  0 00:15 ?        00:00:01 redis-server *:7000 [cluster]

root     10961     1  0 00:15 ?        00:00:01 redis-server *:7001 [cluster]

root     10965     1  0 00:15 ?        00:00:01 redis-server *:7002 [cluster]

 

root     10982     1  0 00:15 ?        00:00:01 redis-server *:7003 [cluster]

 

2.安装ruby、rubygems、redis ruby接口。

yum install ruby

yum install rubygems

gem install redis

理想情况下上面三行就搞定了,但是我的ruby版本太低,需要升级ruby。

安装gem 需要ruby的版本在 1.8.7 以上,默认的centos5 上都是1.8.5 版本:

所以需要升级zlib,升级ruby

先升级zlib

yum install -y gcc zlib zlib-devel

yum install ruby 

查看下ruby的版本

ruby -v

 

rpm -ivh http://yum.puppetlabs.com/el/5/products/x86_64/puppetlabs-release-5-6.noarch.rpm

yum install ruby ruby-devel rubygems rpm-build

rpm -ivh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm

vi /etc/yum.repos.d/epel.repo  修改 enabled=1 

yum install rubygems 

 

3.gem 安装redis ruby 接口,我是先下载下来放到本地安装的。

wget https://rubygems.global.ssl.fastly.net/gems/redis-3.2.1.gem

sudo gem install -l ./redis-3.2.1.gem

 

4.redis-trib.rb脚本创建集群

cd /usr/local/redis3.0.5/

 

src/redis-trib.rb create --replicas 1 192.168.129.103:7000 192.168.129.103:7001 192.168.129.103:7002 192.168.129.103:7003 192.168.129.107:9000 192.168.129.107:9001

 

[root@localhost src]# ./redis-trib.rb create --replicas 1 192.168.129.103:7000 192.168.129.103:7001 192.168.129.103:7002 192.168.129.103:7003 192.168.129.107:9000 192.168.129.107:9001

>>> Creating cluster

Connecting to node 192.168.129.103:7000: OK

Connecting to node 192.168.129.103:7001: OK

Connecting to node 192.168.129.103:7002: OK

Connecting to node 192.168.129.103:7003: OK

Connecting to node 192.168.129.107:9000: OK

Connecting to node 192.168.129.107:9001: OK

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

 

 

集群创建完成,check一下看看:

[root@localhost src]# ./redis-trib.rb check 192.168.129.103:7000

Connecting to node 192.168.129.103:7000: OK

Connecting to node 192.168.129.103:7003: OK

Connecting to node 192.168.129.103:7001: OK

Connecting to node 192.168.129.107:9000: OK

Connecting to node 192.168.129.103:7002: OK

Connecting to node 192.168.129.107:9001: OK

>>> Performing Cluster Check (using node 192.168.129.103:7000)

M: 5f0adb50d0dd1aa69d34ec66b09413d984d124a1 192.168.129.103:7000

   slots:5461-10922 (5462 slots) master

   1 additional replica(s)

S: 4326d921c90559c9b26d84c19b151b8be43ee711 192.168.129.103:7003

   slots: (0 slots) slave

   replicates 25e7505b6647bc56781a6f8cf9addcae196d000c

S: b17b58c85c2a70ab781f35edc900d3031c7623b1 192.168.129.103:7001

   slots: (0 slots) slave

   replicates cc319d119402df317df41bc60b38cd8bb80e78bf

M: cc319d119402df317df41bc60b38cd8bb80e78bf 192.168.129.107:9000

   slots:0-5460 (5461 slots) master

   1 additional replica(s)

S: 966450aef1072b222b876c046f9a78ab7837fcd8 192.168.129.103:7002

   slots: (0 slots) slave

   replicates 5f0adb50d0dd1aa69d34ec66b09413d984d124a1

M: 25e7505b6647bc56781a6f8cf9addcae196d000c 192.168.129.107:9001

   slots:10923-16383 (5461 slots) master

   1 additional replica(s)

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

[root@localhost src]# 

 

没问题,再客户端连接上去操作下,连接集群需要加-c参数

[root@localhost src]# redis-cli -c -p 7000

127.0.0.1:7000> set key v

-> Redirected to slot [12539] located at 192.168.129.107:9001

OK

192.168.129.107:9001> set key5 v5

-> Redirected to slot [9057] located at 192.168.129.103:7000

OK

192.168.129.103:7000> 

 

如果想修改集群,可以使用add-node,迁移数据槽使用reshard,暂不详细描述了。

 

 参考资料:

1.百度文库里的《redis3.0.2 分布式集群安装详细步骤》

 

 2.centos 安装 redis3.0.0 集群

http://blog.csdn.net/lifeiaidajia/article/details/45370377

 

3.ruby升级不堪回首的往事

http://www.tuicool.com/articles/yauaM3

 

4.安装 ruby gems

http://storysky.blog.51cto.com/628458/1155353/

 

 

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