redis集群配置笔记

用两台服务器模拟6个节点，一台机器3个节点，创建出3 master、3 salve 环境。

redis 采用 redis-3.2.6 版本。

安装过程

1. 下载并解压

到redis官网下载 redis-3.2.6.tar.gz

http://download.redis.io/releases/redis-3.2.6.tar.gz

[weixin@i-2-1366-VM ~]$ tar -zxvf redis-3.2.6.tar.gz

2.编译安装

[weixin@i-2-1366-VM ~]$ mv redis-3.2.6 redis_rb
[weixin@i-2-1366-VM ~]$ cd redis_rb
[weixin@i-2-1366-VM redis_rb]$ make && make install

3.创建 Redis 节点

首先在 10.153.68.6 机器上 redis_rb 目录下创建 redis_cluster 目录；

[weixin@i-2-1366-VM redis_rb]$ mkdir redis_cluster
[weixin@i-2-1366-VM redis_rb]$ cd redis_cluster/

在 redis_cluster 目录下，创建名为7000、7001、7002的目录，并将 redis.conf 拷贝到这三个目录中

[weixin@i-2-1366-VM redis_cluster]$ mkdir 7003 7004 7005
[weixin@i-2-1366-VM redis_cluster]$ vi 7003/redis.conf
[weixin@i-2-1366-VM redis_cluster]$ cp 7003/redis.conf 7004
[weixin@i-2-1366-VM redis_cluster]$ cp 7003/redis.conf 7005
[weixin@i-2-1366-VM redis_cluster]$ vi 7004/redis.conf
[weixin@i-2-1366-VM redis_cluster]$ vi 7005/redis.conf

分别修改这三个配置文件，修改如下内容

port  7000                                        //端口7000,7002,7003
bind 本机ip                                       //默认ip为127.0.0.1 需要改为其他节点机器可访问的ip 否则创建集群时无法访问对应的端口，无法创建集群
daemonize    yes                               //redis后台运行
pidfile  /var/run/redis_7000.pid          //pidfile文件对应7000,7001,7002
cluster-enabled  yes                           //开启集群  把注释#去掉
cluster-config-file  nodes_7000.conf   //集群的配置  配置文件首次启动自动生成 7000,7001,7002
cluster-node-timeout  15000                //请求超时  默认15秒，可自行设置
appendonly  yes                           //aof日志开启  有需要就开启，它会每次写操作都记录一条日志

4.启动各个节点

[weixin@i-2-1366-VM redis_rb]$ ./src/redis-server ./redis_cluster/7003/redis.conf
[weixin@i-2-1366-VM redis_rb]$ ./src/redis-server ./redis_cluster/7004/redis.conf
[weixin@i-2-1366-VM redis_rb]$ ./src/redis-server ./redis_cluster/7005/redis.conf

接着在另外一台机器上（10.153.68.4），的操作重复以上三步，只是把目录改为7003、7004、7005，对应的配置文件也按照这个规则修改即可

5.检查启动情况

[weixin@i-2-1366-VM redis_rb]$ netstat -tlnp | grep redis
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp        0      0 10.153.86.4:7005            0.0.0.0:*                   LISTEN      4764/./src/redis-se
tcp        0      0 10.153.86.4:17003           0.0.0.0:*                   LISTEN
4000
4742/./src/redis-se
tcp        0      0 10.153.86.4:6379            0.0.0.0:*                   LISTEN      40857/./src/redis-s
tcp        0      0 127.0.0.1:6379              0.0.0.0:*                   LISTEN      40857/./src/redis-s
tcp        0      0 10.153.86.4:17004           0.0.0.0:*                   LISTEN      4753/./src/redis-se
tcp        0      0 10.153.86.4:17005           0.0.0.0:*                   LISTEN      4764/./src/redis-se
tcp        0      0 10.153.86.4:7003            0.0.0.0:*                   LISTEN      4742/./src/redis-se
tcp        0      0 10.153.86.4:7004            0.0.0.0:*                   LISTEN      4753/./src/redis-se

[weixin@i-2-1366-VM redis_rb]$ ps -aux|grep 'redis'
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
weixin    4742  0.0  0.0 133528  2412 ?        Ssl  20:06   0:00 ./src/redis-server 10.153.86.4:7003 [cluster]
weixin    4753  0.0  0.0 133528  2416 ?        Ssl  20:06   0:00 ./src/redis-server 10.153.86.4:7004 [cluster]
weixin    4764  0.0  0.0 133528  2416 ?        Ssl  20:06   0:00 ./src/redis-server 10.153.86.4:7005 [cluster]

6.创建集群

Redis 官方提供了 redis-trib.rb 这个工具，就在解压目录的 src 目录中，第三步中已将它复制到 /usr/local/bin 目录中，可以直接在命令行中使用了。使用下面这个命令即可完成安装。

[weixin@ZYC-NLKFPT-CPQDGL01 redis]$ ./src/redis-trib.rb  create  --replicas  1  10.153.86.6:7000 10.153.86.6:7001 10.153.86.6:7002 10.153.86.4:7003 10.153.86.4:7004 10.153.86.4:7005
/usr/bin/env: ruby: No such file or directory

[weixin@ZYC-NLKFPT-CPQDGL01 redis]$ ./src/redis-trib.rb  create  --replicas  1  10.153.86.6:7000 10.153.86.6:7001 10.153.86.6:7002 10.153.86.4:7003 10.153.86.4:7004 10.153.86.4:7005
/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 ./src/redis-trib.rb:25

https://rubygems.org/gems/redis/versions/4.0.0.rc1

[zwq18719128666@ZYC-NLKFPT-CPQDGL01 ~]$ sudo gem install redis --pre
Successfully installed redis-4.0.0.rc1
1 gem installed
Installing ri documentation for redis-4.0.0.rc1...
Installing RDoc documentation for redis-4.0.0.rc1...

[root@ZYC-NLKFPT-CPQDGL01 redis]# ./src/redis-trib.rb  create  --replicas  1  10.153.86.6:7000 10.153.86.6:7001 10.153.86.6:7002 10.153.86.4:7003 10.153.86.4:7004 10.153.86.4:7005
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
10.153.86.4:7003
10.153.86.6:7000
10.153.86.4:7004
Adding replica 10.153.86.6:7001 to 10.153.86.4:7003
Adding replica 10.153.86.4:7005 to 10.153.86.6:7000
Adding replica 10.153.86.6:7002 to 10.153.86.4:7004
M: e65f5f5caf941a4b74284770dbdf26ae15b40f68 10.153.86.6:7000
slots:5461-10922 (5462 slots) master
S: 0e8729a859497c59e8c0dc25b6c2c6ab49c41d11 10.153.86.6:7001
replicates 450ab47539885de9ae9875fb369390ce2d7bbea7
S: 674a1901b20246936bc64a7bd1182467e085cdf6 10.153.86.6:7002
replicates c94f817cd2f75b3ff6a5554c9c6eb5f0e631dcf5
M: 450ab47539885de9ae9875fb369390ce2d7bbea7 10.153.86.4:7003
slots:0-5460 (5461 slots) master
M: c94f817cd2f75b3ff6a5554c9c6eb5f0e631dcf5 10.153.86.4:7004
slots:10923-16383 (5461 slots) master
S: 87f4c5f0de38882c683f04e6a3dc4ecfc9537aa5 10.153.86.4:7005
replicates e65f5f5caf941a4b74284770dbdf26ae15b40f68
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 10.153.86.6:7000)
M: e65f5f5caf941a4b74284770dbdf26ae15b40f68 10.153.86.6:7000
slots:5461-10922 (5462 slots) master
1 additional replica(s)
S: 674a1901b20246936bc64a7bd1182467e085cdf6 10.153.86.6:7002
slots: (0 slots) slave
replicates c94f817cd2f75b3ff6a5554c9c6eb5f0e631dcf5
S: 87f4c5f0de38882c683f04e6a3dc4ecfc9537aa5 10.153.86.4:7005
slots: (0 slots) slave
replicates e65f5f5caf941a4b74284770dbdf26ae15b40f68
M: c94f817cd2f75b3ff6a5554c9c6eb5f0e631dcf5 10.153.86.4:7004
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 0e8729a859497c59e8c0dc25b6c2c6ab49c41d11 10.153.86.6:7001
slots: (0 slots) slave
replicates 450ab47539885de9ae9875fb369390ce2d7bbea7
M: 450ab47539885de9ae9875fb369390ce2d7bbea7 10.153.86.4:7003
slots:0-5460 (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.

到此，集群已经部署完成。

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