操作系统环境
[root@62290133db0c ~]# cat /etc/issue CentOS release 6.7 (Final) Kernel \r on an \m [root@62290133db0c ~]# getconf LONG_BIT 64
redis安装请参考redis安装一遍博文，redis集群是在3.0中推出的集群功能...........
由于资源有限，只好在一台机器上搭建redis集群环境,redis版本3.0.6，要让集群正常运作至少需要三个主节点，不过在刚开始试用集群功能时， 强烈建议使用六个节点： 其中三个为主节点， 而其余三个则是各个主节点的从节点。
| redis | dir | port |
| 6381 | /opt/6381 | 6381 |
| 6382 | /opt/6382 | 6382 |
| 6383 | /opt/6383 | 6383 |
| 6384 | /opt/6384 | 6384 |
| 6385 | /opt/6385 | 6385 |
| 6386 | /opt/6386 | 6386 |
创建redis相应的目录
[root@62290133db0c ~]# mkdir /opt/638{1..6}
[root@62290133db0c ~]# tree /opt/
/opt/
├── 6381
├── 6382
├── 6383
├── 6384
├── 6385
└── 6386
6 directories, 0 files拷贝配置文件以及redis启动redis-server文件
[root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/redis.conf /opt/6381/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6381/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6382/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6383/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6384/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6385/ [root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-server /opt/6386/ [root@62290133db0c ~]# cd /opt/6381/
6381配置文件
[root@62290133db0c 6381]# vim redis.conf daemonize yes pidfile /var/run/redis-6381.pid port 6381 tcp-keepalive 60 logfile "/var/log/redis/6381.log" dbfilename dump.rdb dir /opt/6381/ slave-serve-stale-data yes appendonly yes appendfilename "appendonly-6381.aof" appendfsync everysec cluster-enabled yes cluster-config-file nodes.conf cluster-node-timeout 5000
拷贝redis配置文件到其他redis对应的目录下，并修改redis的配置文件
[root@62290133db0c ~]# cp /opt/6381/redis.conf /opt/6382/ [root@62290133db0c ~]# cp /opt/6381/redis.conf /opt/6383/ [root@62290133db0c ~]# cp /opt/6381/redis.conf /opt/6384/ [root@62290133db0c ~]# cp /opt/6381/redis.conf /opt/6385/ [root@62290133db0c ~]# cp /opt/6381/redis.conf /opt/6386/ [root@62290133db0c ~]# sed -i "s#6381#6382#g" /opt/6382/redis.conf [root@62290133db0c ~]# sed -i "s#6381#6383#g" /opt/6383/redis.conf [root@62290133db0c ~]# sed -i "s#6381#6384#g" /opt/6384/redis.conf [root@62290133db0c ~]# sed -i "s#6381#6385#g" /opt/6385/redis.conf [root@62290133db0c ~]# sed -i "s#6381#6386#g" /opt/6386/redis.conf
分别启动6381..6386
[root@62290133db0c ~]# /opt/6381/redis-server /opt/6381/redis.conf [root@62290133db0c ~]# /opt/6382/redis-server /opt/6382/redis.conf [root@62290133db0c ~]# /opt/6383/redis-server /opt/6383/redis.conf [root@62290133db0c ~]# /opt/6384/redis-server /opt/6384/redis.conf [root@62290133db0c ~]# /opt/6385/redis-server /opt/6385/redis.conf [root@62290133db0c ~]# /opt/6386/redis-server /opt/6386/redis.conf
查看redis进程
[root@62290133db0c ~]# ps -ef|grep redis|grep -v grep root 809 1 0 09:17 ? 00:00:00 /opt/6381/redis-server *:6381 [cluster] root 815 1 0 09:18 ? 00:00:00 /opt/6382/redis-server *:6382 [cluster] root 821 1 0 09:18 ? 00:00:00 /opt/6383/redis-server *:6383 [cluster] root 825 1 0 09:18 ? 00:00:00 /opt/6384/redis-server *:6384 [cluster] root 829 1 0 09:18 ? 00:00:00 /opt/6385/redis-server *:6385 [cluster] root 833 1 0 09:18 ? 00:00:00 /opt/6386/redis-server *:6386 [cluster] 注：以上只是把各个redis节点启动成功
创建redis集群
[root@62290133db0c ~]# redis-trib.rb create ----replicas 1 172.17.0.1:6381 172.17.0.1:6382 172.17.0.1:6383 172.17.0.1:6384 172.17.0.1:6385 172.17.0.1:6386 >>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 172.17.0.1:6381 172.17.0.1:6382 172.17.0.1:6383 Adding replica 172.17.0.1:6384 to 172.17.0.1:6381 Adding replica 172.17.0.1:6385 to 172.17.0.1:6382 Adding replica 172.17.0.1:6386 to 172.17.0.1:6383 M: d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 172.17.0.1:6381 slots:0-5460 (5461 slots) master M: be37cf292b638d919e9e39fc3ebe3984697f6026 172.17.0.1:6382 slots:5461-10922 (5462 slots) master M: 5e5f54956d424ac491820f10ef0e8be443e1d98f 172.17.0.1:6383 slots:10923-16383 (5461 slots) master S: ddf29c1716a7b111f26cfa2376edbf84b7e4f471 172.17.0.1:6384 replicates d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 S: 54c405412761e7714062260c7080e0f904d04cfe 172.17.0.1:6385 replicates be37cf292b638d919e9e39fc3ebe3984697f6026 S: b0d8b47bf039f65e452a661613d97f62ba569dfb 172.17.0.1:6386 replicates 5e5f54956d424ac491820f10ef0e8be443e1d98f Can I set the above configuration? (type 'yes' to accept): yes //同意输入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 172.17.0.1:6381) M: d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 172.17.0.1:6381 slots:0-5460 (5461 slots) master M: be37cf292b638d919e9e39fc3ebe3984697f6026 172.17.0.1:6382 slots:5461-10922 (5462 slots) master M: 5e5f54956d424ac491820f10ef0e8be443e1d98f 172.17.0.1:6383 slots:10923-16383 (5461 slots) master M: ddf29c1716a7b111f26cfa2376edbf84b7e4f471 172.17.0.1:6384 slots: (0 slots) master replicates d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 M: 54c405412761e7714062260c7080e0f904d04cfe 172.17.0.1:6385 slots: (0 slots) master replicates be37cf292b638d919e9e39fc3ebe3984697f6026 M: b0d8b47bf039f65e452a661613d97f62ba569dfb 172.17.0.1:6386 slots: (0 slots) master replicates 5e5f54956d424ac491820f10ef0e8be443e1d98f [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
登陆任意redis节点
[root@62290133db0c ~]# redis-cli -c -p 6381 127.0.0.1:6381> CLUSTER NODES //各个节点以及主从对应的信息 54c405412761e7714062260c7080e0f904d04cfe 172.17.0.1:6385 slave be37cf292b638d919e9e39fc3ebe3984697f6026 0 1451889401026 5 connected 5e5f54956d424ac491820f10ef0e8be443e1d98f 172.17.0.1:6383 master - 0 1451889401529 3 connected 10923-16383 ddf29c1716a7b111f26cfa2376edbf84b7e4f471 172.17.0.1:6384 slave d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 0 1451889400017 4 connected d3b7db6b7b2696be3e2dbb74d99d33e6a3b31658 172.17.0.1:6381 myself,master - 0 0 1 connected 0-5460 b0d8b47bf039f65e452a661613d97f62ba569dfb 172.17.0.1:6386 slave 5e5f54956d424ac491820f10ef0e8be443e1d98f 0 1451889402033 6 connected be37cf292b638d919e9e39fc3ebe3984697f6026 172.17.0.1:6382 master - 0 1451889400522 2 connected 5461-10922
登陆redis 6381
[root@62290133db0c ~]# redis-cli -c -p 6381 127.0.0.1:6381> set name zxl -> Redirected to slot [5798] located at 172.17.0.1:6382 OK 172.17.0.1:6382> set age 33 -> Redirected to slot [741] located at 172.17.0.1:6381 OK 172.17.0.1:6381> KEYS * 1) "age" 172.17.0.1:6381> GET age "33" 172.17.0.1:6381> [root@62290133db0c ~]# redis-cli -c -p 6382 127.0.0.1:6382> KEYS * 1) "name" 127.0.0.1:6382> get name "zxl" 127.0.0.1:6382>
注：以上就是redis集群创建
创建redis集群时，错误总结如下：
[root@62290133db0c ~]# cp /usr/local/src/redis-3.0.6/src/redis-trib.rb /usr/local/bin/ [root@62290133db0c ~]# redis-trib.rb create --replicas 1 172.17.0.1:6381 172.17.0.1:6382 172.17.0.1:6383 172.17.0.1:6384 172.17.0.1:6385 172.17.0.1:6386 /usr/bin/env: ruby: No such file or directory
注：缺少ruby环境，需安装
[root@62290133db0c ~]# yum install ruby -y
提示如下：
[root@62290133db0c ~]# redis-trib.rb create --replicas 1 172.17.0.1:6381 172.17.0.1:6382 172.17.0.1:6383 172.17.0.1:6384 172.17.0.1:6385 172.17.0.1:6386 /usr/local/bin/redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError) from /usr/local/bin/redis-trib.rb:24
注：需安装rubygems
[root@62290133db0c ~]# yum install rubygems -y
提示如下：
[root@62290133db0c ~]# redis-trib.rb create --replicas 1 172.17.0.1:6381 172.17.0.1:6382 172.17.0.1:6383 172.17.0.1:6384 172.17.0.1:6385 172.17.0.1:6386 /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 /usr/local/bin/redis-trib.rb:25
注：提示不能加载redis，是因为缺少redis和ruby的接口，使用gem安装
[root@62290133db0c ~]# gem install redis Successfully installed redis-3.2.1 1 gem installed Installing ri documentation for redis-3.2.1... Installing RDoc documentation for redis-3.2.1...
