redis集群搭建实践

第一个节点

第一个节点为本地的机器 IP:192.168.23.148

检查机器配置

$ uname -a

Linux wangya-Lenovo-G480 4.8.0-52-generic #55~16.04.1-Ubuntu SMP Fri Apr 28 14:36:29 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ cat /proc/cpuinfo

...

model name	: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz

...

安装包

redis-3.2.9.tar.gz

解压

$ cd  /home/wangya/dev/redis

$ tar zxvf redis-3.2.9.tar.gz

编译安装

$ cd redis-3.2.9/

$ make && make install

出现下面的结果

make[1]: Leaving directory '/home/wangya/dev/redis/redis-3.2.9/src'

cd src && make install

make[1]: Entering directory '/home/wangya/dev/redis/redis-3.2.9/src'

Hint: It's a good idea to run 'make test' ;)

    INSTALL install

install: 无法创建普通文件'/usr/local/bin/redis-server': 权限不够

Makefile:266: recipe for target 'install' failed

make[1]: *** [install] Error 1

make[1]: Leaving directory '/home/wangya/dev/redis/redis-3.2.9/src'

Makefile:9: recipe for target 'install' failed

make: *** [install] Error 2

先暂时不管报错，按照提示执行 // TODO

$ make test

等个2分钟左右，显示如下

          The End

Execution time of different units:

  0 seconds - unit/printver

  0 seconds - unit/type/incr

  1 seconds - unit/auth

  ...

  ...

  ...

  110 seconds - unit/type/list-3

  93 seconds - unit/obuf-limits

  106 seconds - integration/replication-psync

\o/ All tests passed without errors!

Cleanup: may take some time... OK

make[1]: Leaving directory '/home/wangya/dev/redis/redis-3.2.9/src'

集群

$ mkdir redis_cluster

$ cd redis_cluster/

$ mkdir 7000 7001 7002

$ cd ..

$ cp redis.conf redis_cluster/7000

$ cp redis.conf redis_cluster/7001

$ cp redis.conf redis_cluster/7002

依次修改对应的配置文件

port 7000                              //端口7000,7002,7003

bind 192.168.23.148

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            //释放 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

启动

$ cd /home/wangya/dev/redis/redis-3.2.9

$ ./src/redis-server redis_cluster/7000/redis.conf

$ ./src/redis-server redis_cluster/7001/redis.conf

$ ./src/redis-server redis_cluster/7002/redis.conf

查看进程

$ ps -ef | grep redis

wangya   14113  1670  0 16:16 ?        00:00:00 ./src/redis-server 192.168.23.148:7000 [cluster]

wangya   14129  1670  0 16:17 ?        00:00:00 ./src/redis-server 192.168.23.148:7001 [cluster]

wangya   14133  1670  0 16:17 ?        00:00:00 ./src/redis-server 192.168.23.148:7002 [cluster]

wangya   14158  7556  0 16:18 pts/0    00:00:00 grep --color=auto

$ netstat -tnlp | grep redis

（并非所有进程都能被检测到，所有非本用户的进程信息将不会显示，如果想看到所有信息，则必须切换到 root 用户）

tcp        0      0 192.168.23.148:7000     0.0.0.0:*               LISTEN      14113/redis-server

tcp        0      0 192.168.23.148:7001     0.0.0.0:*               LISTEN      14129/redis-server

tcp        0      0 192.168.23.148:7002     0.0.0.0:*               LISTEN      14133/redis-server

tcp        0      0 192.168.23.148:17000    0.0.0.0:*               LISTEN      14113/redis-server

tcp        0      0 192.168.23.148:17001    0.0.0.0:*               LISTEN      14129/redis-server

tcp        0      0 192.168.23.148:17002    0.0.0.0:*               LISTEN      14133/redis-server

第二个节点

第二个节点为Mac主机 IP:192.168.23.149

配置

$ uname -a

Darwin lanjingdeMacBook-Pro.local 16.5.0 Darwin Kernel Version 16.5.0: Fri Mar  3 16:52:33 PST 2017; root:xnu-3789.51.2~3/RELEASE_X86_64 x86_64

参考相同的办法搭建

$ ps -ef | grep redis

  501 93858     1   0  5:33下午 ??         0:00.07 ./src/redis-server 192.168.23.149:7003 [cluster]

  501 93863     1   0  5:33下午 ??         0:00.07 ./src/redis-server 192.168.23.149:7004 [cluster]

  501 93865     1   0  5:34下午 ??         0:00.06 ./src/redis-server 192.168.23.149:7005 [cluster]

  501 93910 64442   0  5:35下午 ttys002    0:00.00 grep redis

创建集群

执行

$ ./src/redis-trib.rb create --replicas 1 192.168.23.148:7000  192.168.23.148:7001  192.168.23.148:7002 192.168.23.149:7003 192.168.23.149:7004  192.168.23.149:7005

结果出错

$ ./src/redis-trib.rb create --replicas 1 192.168.23.148:7000  192.168.23.148:7001  192.168.23.148:7002 192.168.23.149:7003 192.168.23.149:7004  192.168.23.149:7005

/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- redis (LoadError)

	from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'

	from ./src/redis-trib.rb:25:in `<main>'

这说明需要提供ruby访问redis的客户端

$ gem install redis

安装一下就OK啦

如果没有Ruby，或者版本太低的话，那么根据自己平台自行安装

最后再次执行上面的命令

$ ./src/redis-trib.rb create --replicas 1 192.168.23.148:7000  192.168.23.148:7001  192.168.23.148:7002 192.168.23.149:7003 192.168.23.149:7004  192.168.23.149:7005

>>> Creating cluster

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

Using 3 masters:

192.168.23.148:7000

192.168.23.149:7003

192.168.23.148:7001

Adding replica 192.168.23.149:7004 to 192.168.23.148:7000

Adding replica 192.168.23.148:7002 to 192.168.23.149:7003

Adding replica 192.168.23.149:7005 to 192.168.23.148:7001

M: 3e491c2f1b74776887198004628c27a402b02235 192.168.23.148:7000

   slots:0-5460 (5461 slots) master

M: d44d2b25b051f390fa97a696f65a04cbd11d438d 192.168.23.148:7001

   slots:10923-16383 (5461 slots) master

S: 01ade8ffc5e11a8ab646be5550f0ca9d53ef70cd 192.168.23.148:7002

   replicates ad24d813be329053df26993e8cb529a0fb350695

M: ad24d813be329053df26993e8cb529a0fb350695 192.168.23.149:7003

   slots:5461-10922 (5462 slots) master

S: fddfa2c20518c42733bf3680b2fb6b5d0e1c9a2d 192.168.23.149:7004

   replicates 3e491c2f1b74776887198004628c27a402b02235

S: e35177d7f5b1378ec24a6cf7b31a0a8bda2385cf 192.168.23.149:7005

   replicates d44d2b25b051f390fa97a696f65a04cbd11d438d

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 192.168.23.148:7000)

M: 3e491c2f1b74776887198004628c27a402b02235 192.168.23.148:7000

   slots:0-5460 (5461 slots) master

   1 additional replica(s)

S: fddfa2c20518c42733bf3680b2fb6b5d0e1c9a2d 192.168.23.149:7004

   slots: (0 slots) slave

   replicates 3e491c2f1b74776887198004628c27a402b02235

S: 01ade8ffc5e11a8ab646be5550f0ca9d53ef70cd 192.168.23.148:7002

   slots: (0 slots) slave

   replicates ad24d813be329053df26993e8cb529a0fb350695

M: ad24d813be329053df26993e8cb529a0fb350695 192.168.23.149:7003

   slots:5461-10922 (5462 slots) master

   1 additional replica(s)

S: e35177d7f5b1378ec24a6cf7b31a0a8bda2385cf 192.168.23.149:7005

   slots: (0 slots) slave

   replicates d44d2b25b051f390fa97a696f65a04cbd11d438d

M: d44d2b25b051f390fa97a696f65a04cbd11d438d 192.168.23.148:7001

   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.

搭建完成

测试

$ ./src/redis-cli -h 192.168.23.148 -c -p 7001

192.168.23.149:7003> set age 26

-> Redirected to slot [741] located at 192.168.23.148:7000

OK

192.168.23.148:7000> keys *

1) "age"

192.168.23.148:7000> get age

"26"

192.168.23.148:7000> get name

-> Redirected to slot [5798] located at 192.168.23.149:7003

"wangya"

192.168.23.149:7003> keys *

1) "name"

然后换第二节点获取数据

$ ./src/redis-cli -h 192.168.23.149 -c -p 7004

192.168.23.149:7004> get name

-> Redirected to slot [5798] located at 192.168.23.149:7003

"wangya"

192.168.23.149:7003> get age

-> Redirected to slot [741] located at 192.168.23.148:7000

"26"

192.168.23.148:7000> keys *

1) "age"

192.168.23.148:7000>

测试通过

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