从redis官网看最新稳定版本已经更新到3.2.6了，我这里补充一篇以前3.2.0的集群配置。
说明：
部署步骤：
2、
创建redis集群节点
3、复制默认的节点配置文件到集群节点中
9
、
确认所有的节点都启动，接下来使用参数create 创建
这样就是一个正常的集群了~~运维人员再也不会因为宕机或者redis挂了的问题头疼了！
说明：
redis从3.0版本以后开始支持cluster模式，原理和功能大家可以上网查，对于运维人员来说最重要的去掉了代理层、避免出现单点故障，但是redis cluster至少需要三个主节点和三个从节点。每一对主从形成一组关系。因此需要三台服务器，每台服务器上两个实例。因为一个主对应一个从，所以一台服务器上不能同时是一个主和从，必须三台服务器分开主从，来保证服务的正常运行。我这里为了演示方便就在一台服务器上部署。注意：生产环境必须是三台机器，不然达不到高可用。
部署环境：
| 主机名 |
IP地址 |
操作系统版本 |
用途 |
| test01 |
192.168.2.9 |
CentOS6.3（64位） |
实例 7000/7001 |
| test02 |
192.168.2.10 |
CentOS 6.3（64位） |
实例 7002/7003 |
| test03 |
192.168.2.7 |
CentOS 6.3（64位） |
实例 7004/7005 |
1、编译安装redis。
把安装包放在/data/下解压并编译
点击(此处)折叠或打开
- [root@test01 data]# tar -zxf redis-3.2.0.tar.gz
- [root@test01 redis]# cd redis-3.2.0
- [root@test01 redis-3.2.0]# make && make install
- [root@test01 redis]# ln -s /data/redis/redis-3.2.0 /usr/local/redis
点击(此处)折叠或打开
- [root@test01 local]# mkdir redis_cluster
- [root@test01 local]# cd redis_cluster/
- [root@test01 redis_cluster]# mkdir 7000 7001
点击(此处)折叠或打开
- [root@test01 redis_cluster]# cp /usr/local/redis/redis.conf ./7000
4、修改默认配置文件
点击(此处)折叠或打开
- [root@test01 7000]# vim redis.conf
- daemonize yes //redis后台运行
- pidfile /var/run/redis_7000.pid //pidfile文件对应7000
- port 7000 //端口7000
- cluster-enabled yes //开启集群 把注释#去掉
- cluster-config-file nodes.conf //集群的配置 配置文件首次启动自动生成
- cluster-node-timeout 6000 //请求超时
- appendonly yes //日志开启，环境测试开启，正式环境建议关闭
- bind 192.168.2.9 //修改监听的地址为本机地址
5、修改完后把配置文件复制到7001上并修改相应的端口。
点击(此处)折叠或打开
- [root@test01 7000]# cp redis.conf ../7001/
6、另外两台服务器重复上面配置。
7、启动各个节点，注意一定要到端口目录下去启动，不然有的启动不起来。
点击(此处)折叠或打开
- [root@test01 7000]# /usr/local/redis/src/redis-server redis.conf
- [root@test01 7000]# cd ../7001/
- [root@test01 7001]# /usr/local/redis/src/redis-server redis.conf
查看启动进程
点击(此处)折叠或打开
- [root@test01 7001]# ps -ef|grep redis
- root 8858 1 0 11:38 ? 00:00:00 /usr/local/redis/src/redis-server 192.168.2.9:7000 [cluster]
- root 8865 1 0 11:39 ? 00:00:00 /usr/local/redis/src/redis-server 192.168.2.9:7001 [cluster]
- root 8870 27799 0 11:39 pts/1 00:00:00 grep redis
再分别启动其余服务器节点。
8、创建集群必须的软件，三台服务器都执行
点击(此处)折叠或打开
- [root@test01 7000]# yum -y install ruby ruby-devel rubygems rpm-build
- [root@test01 7000]# ruby -v
- ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]
- [root@redis 7000]# rpm -qa|grep rubyge
- rubygems-1.3.7-5.el6.noarch
- [root@redis 7000]# gem install redis
- Successfully installed redis-3.3.0
- 1 gem installed
- Installing ri documentation for redis-3.3.0...
- Installing RDoc documentation for redis-3.3.0.
点击(此处)折叠或打开
- [root@test01 7000]# /usr/local/redis/src/redis-trib.rb create --replicas 1 192.168.2.9:7000 192.168.2.10:7002 192.168.2.7:7004 192.168.2.10:7003 192.168.2.7:7005 192.168.2.9:7001
- >>> Creating cluster
- >>> Performing hash slots allocation on 6 nodes...
- Using 3 masters:
- 192.168.2.7:7004
- 192.168.2.9:7000
- 192.168.2.10:7002
- Adding replica 192.168.2.9:7001 to 192.168.2.7:7004
- Adding replica 192.168.2.7:7005 to 192.168.2.9:7000
- Adding replica 192.168.2.10:7003 to 192.168.2.10:7002
- M: bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.9:7000
- slots:5461-10922 (5462 slots) master
- M: 01594f84df9e743a74a47f9aaa58fa41402dfe25 192.168.2.10:7002
- slots:10923-16383 (5461 slots) master
- M: 27cedfdc0a648b9141736f156a4d89828d7bf695 192.168.2.7:7004
- slots:0-5460 (5461 slots) master
- S: 6f13ca12a9be3b0c093d02c81fed337307f295af 192.168.2.10:7003
- replicates 01594f84df9e743a74a47f9aaa58fa41402dfe25
- S: 00333fa0ac74863e86c3108f6040abe1183a2b9b 192.168.2.7:7005
- replicates bede5b72dfbb5274e52a1f0c5f6b43170afec8af
- S: f167b98d8f78bfdb4c1823c0d6be7f1a12aff194 192.168.2.9:7001
- replicates 27cedfdc0a648b9141736f156a4d89828d7bf695
- 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 192.168.2.9:7000)
- M: bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.9:7000
- slots:5461-10922 (5462 slots) master
- M: 01594f84df9e743a74a47f9aaa58fa41402dfe25 192.168.2.10:7002
- slots:10923-16383 (5461 slots) master
- M: 27cedfdc0a648b9141736f156a4d89828d7bf695 192.168.2.7:7004
- slots:0-5460 (5461 slots) master
- M: 6f13ca12a9be3b0c093d02c81fed337307f295af 192.168.2.10:7003
- slots: (0 slots) master
- replicates 01594f84df9e743a74a47f9aaa58fa41402dfe25
- M: 00333fa0ac74863e86c3108f6040abe1183a2b9b 192.168.2.7:7005
- slots: (0 slots) master
- replicates bede5b72dfbb5274e52a1f0c5f6b43170afec8af
- M: f167b98d8f78bfdb4c1823c0d6be7f1a12aff194 192.168.2.9:7001
- slots: (0 slots) master
- replicates 27cedfdc0a648b9141736f156a4d89828d7bf695
- [OK] All nodes agree about slots configuration.
- >>> Check for open slots...
- >>> Check slots coverage...
- [OK] All 16384 slots covered.
--replicas 1 创建集群指定一个从节点。
因为创建集群的时候不能指定主从，它是随机的。加入集群的节点顺序不分前后，如果一台服务器上正好有主节点和从节点，而且是一组的话，必须将同一台服务器上的主从节点踢掉，换成不同服务器的节点。
从上面可以看到很不辛7003和7002分配了一台服务器上。经过测试一般都会有一台服务器上存在同一组的主和从节点。
主从关系图：
192.168.2.10:7002 192.168.2.10:7003
192.168.2.9:7000 192.168.2.7:7005
192.168.2.7:7004 192.168.2.9:7001
10、我们把192.168.2.10:7003和192.168.2.7:7005调换下。
删除7003节点
点击(此处)折叠或打开
- [root@test01 7000]# /usr/local/redis/src/redis-trib.rb del-node 192.168.2.10:7003 6f13ca12a9be3b0c093d02c81fed337307f295af
- >>> Removing node 6f13ca12a9be3b0c093d02c81fed337307f295af from cluster 192.168.2.10:7003
- >>> Sending CLUSTER FORGET messages to the cluster...
- >>> SHUTDOWN the node.
del-node 删除节点后面跟主机和对应的端口还有实例的id。这样才能删除。
11、修改192.168.2.7:7005的主为192.168.2.10:7002
进入192.168.2.7:7005的redis
点击(此处)折叠或打开
- [root@test02 redis_cluster]# /usr/local/redis/src/redis-cli -c -p 7005 -h 192.168.2.7
- 192.168.2.7:7005> cluster replicate 01594f84df9e743a74a47f9aaa58fa41402dfe25 #新主的id
- OK
查看现在主从状态
点击(此处)折叠或打开
- [root@test02 redis_cluster]# /usr/local/redis/src/redis-trib.rb check 192.168.2.10:7002
- >>> Performing Cluster Check (using node 192.168.2.10:7002)
- M: 01594f84df9e743a74a47f9aaa58fa41402dfe25 192.168.2.10:7002
- slots:10923-16383 (5461 slots) master
- 1 additional replica(s)
- M: bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.9:7000
- slots:5461-10922 (5462 slots) master
- 0 additional replica(s)
- M: 27cedfdc0a648b9141736f156a4d89828d7bf695 192.168.2.7:7004
- slots:0-5460 (5461 slots) master
- 1 additional replica(s)
- S: f167b98d8f78bfdb4c1823c0d6be7f1a12aff194 192.168.2.9:7001
- slots: (0 slots) slave
- replicates 27cedfdc0a648b9141736f156a4d89828d7bf695
- S: 00333fa0ac74863e86c3108f6040abe1183a2b9b 192.168.2.7:7005
- slots: (0 slots) slave
- replicates 01594f84df9e743a74a47f9aaa58fa41402dfe25
- [OK] All nodes agree about slots configuration.
- >>> Check for open slots...
- >>> Check slots coverage...
- [OK] All 16384 slots covered.
可以看到主从关系已经改变。
12、再添加刚删除的7003节点。
点击(此处)折叠或打开
- [root@test02 redis_cluster]# ps -ef|grep redis
- root 4441 1 0 11:45 ? 00:00:13 /usr/local/redis/src/redis-server 192.168.2.10:7002 [cluster]
- root 4673 4275 0 15:02 pts/0 00:00:00 grep redis
- [root@test02 redis_cluster]# cd 7003/
- [root@test02 7003]# ls
- appendonly.aof dump.rdb nodes.conf redis.conf
- [root@test02 7003]# rm -f appendonly.aof dump.rdb nodes.conf
- [root@test02 7003]# /usr/local/redis/src/redis-server redis.conf
- [root@test02 7003]# ps -ef|grep redis
- root 4441 1 0 11:45 ? 00:00:14 /usr/local/redis/src/redis-server 192.168.2.10:7002 [cluster]
- root 4677 1 0 15:02 ? 00:00:00 /usr/local/redis/src/redis-server 192.168.2.10:7003 [cluster]
- root 4681 4275 0 15:02 pts/0 00:00:00 grep redis
13、执行下列命令添加从指定的主节点。
点击(此处)折叠或打开
- [root@test02 7003]# /usr/local/redis/src/redis-trib.rb add-node --slave --master-id bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.10:7003 192.168.2.9:7000
- >>> Adding node 192.168.2.7:7005 to cluster 192.168.2.9:7000
- >>> Performing Cluster Check (using node 192.168.2.9:7000)
- M: bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.9:7000
- slots:5461-10922 (5462 slots) master
- 0 additional replica(s)
- S: f167b98d8f78bfdb4c1823c0d6be7f1a12aff194 192.168.2.9:7001
- slots: (0 slots) slave
- replicates 27cedfdc0a648b9141736f156a4d89828d7bf695
- S: 00333fa0ac74863e86c3108f6040abe1183a2b9b 192.168.2.7:7005
- slots: (0 slots) slave
- replicates 01594f84df9e743a74a47f9aaa58fa41402dfe25
- M: 27cedfdc0a648b9141736f156a4d89828d7bf695 192.168.2.7:7004
- slots:0-5460 (5461 slots) master
- 1 additional replica(s)
- M: 01594f84df9e743a74a47f9aaa58fa41402dfe25 192.168.2.10:7002
- 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.
- >>> Send CLUSTER MEET to node 192.168.2.10:7003 to make it join the cluster.
- Waiting for the cluster to join.
- >>> Configure node as replica of 192.168.2.9:7000.
- [OK] New node added correctly.
从上面显示7003节点成为7000的从节点。
14、查看主从现在情况
点击(此处)折叠或打开
- [root@test02 7003]# /usr/local/redis/src/redis-trib.rb check 192.168.2.10:7002
- >>> Performing Cluster Check (using node 192.168.2.10:7002)
- M: 01594f84df9e743a74a47f9aaa58fa41402dfe25 192.168.2.10:7002
- slots:10923-16383 (5461 slots) master
- 1 additional replica(s)
- M: bede5b72dfbb5274e52a1f0c5f6b43170afec8af 192.168.2.9:7000
- slots:5461-10922 (5462 slots) master
- 1 additional replica(s)
- S: 2e26f92f8dca2dfb13f159a59b6260f106bc8cb4 192.168.2.10:7003
- slots: (0 slots) slave
- replicates bede5b72dfbb5274e52a1f0c5f6b43170afec8af
- M: 27cedfdc0a648b9141736f156a4d89828d7bf695 192.168.2.7:7004
- slots:0-5460 (5461 slots) master
- 1 additional replica(s)
- S: f167b98d8f78bfdb4c1823c0d6be7f1a12aff194 192.168.2.9:7001
- slots: (0 slots) slave
- replicates 27cedfdc0a648b9141736f156a4d89828d7bf695
- S: 00333fa0ac74863e86c3108f6040abe1183a2b9b 192.168.2.7:7005
- slots: (0 slots) slave
- replicates 01594f84df9e743a74a47f9aaa58fa41402dfe25
- [OK] All nodes agree about slots configuration.
- >>> Check for open slots...
- >>> Check slots coverage...
- [OK] All 16384 slots covered
