Redis学习笔记——（三）Redis集群安装

redis集群安装
正常安装redis是需要至少6太服务器，这里模拟采用6个实例进行模拟安装。安装步骤
1.集群环境安装，其中redis-3.0.0.gem版本不一定要和redis版本对应，只要保证redis-trib.rb能够运行即可。

redis集群管理工具redis-trib.rb依赖ruby环境，首先需要安装ruby环境：

安装ruby
yum install ruby
yum install rubygems

安装ruby和redis的接口程序
拷贝redis-3.0.0.gem至/usr/local下
执行：
gem install /usr/local/redis-3.0.0.gem

2.新建6个redis实例，修改配置文件，模拟安装。

[root@localhost local]# mkdir redis-cluster --创建主目录，存放6个集群实例
[root@localhost local]# ls
bin  games    lib    libexec  redis-cluster  share
etc  include  lib64  redis    sbin           src
[root@localhost local]# cd redis --进入之前安装好的redis
[root@localhost redis]# cp -r bin ../redis-cluster/redis01 --复制为实例01
[root@localhost redis]# cd ../redis-cluster/redis01/
[root@localhost redis01]# ls
dump.rdb         redis-benchmark  redis-cli   redis-sentinel
mkreleasehdr.sh  redis-check-aof  redis.conf  redis-server
[root@localhost redis01]# rm -f dump.rdb --删除这个dump文件
[root@localhost redis01]# vim redis.conf --编辑配置文件。

3.编辑内容：修改端口号为7001，cluster-enabled yes

4.然后将01复制多份，分别是02、03、04、05、06

[root@localhost redis-cluster]# cp -r redis01/ redis02
[root@localhost redis-cluster]# cp -r redis01/ redis03
[root@localhost redis-cluster]# cp -r redis01/ redis04
[root@localhost redis-cluster]# cp -r redis01/ redis05
[root@localhost redis-cluster]# cp -r redis01/ redis06
[root@localhost redis-cluster]# ls
redis01  redis02  redis03  redis04  redis05  redis06
[root@localhost redis-cluster]# ls
redis01  redis02  redis03  redis04  redis05  redis06

5.然后分别编辑每个redis0x 下的配置文件，修改端口号为对应的端口号。

[root@localhost redis-cluster]# vim redis02/redis.conf 
[root@localhost redis-cluster]# vim redis03/redis.conf 
[root@localhost redis-cluster]# vim redis04/redis.conf 
[root@localhost redis-cluster]# vim redis05/redis.conf 
[root@localhost redis-cluster]# vim redis06/redis.conf 
[root@localhost redis-cluster]# cd /softPage/

6.拷贝redis.trib.rb到redis-cluster目录

[root@localhost softPage]# cd redis-3.2.11/src
[root@localhost src]# cp *.rb /usr/local/redis-cluster/
[root@localhost src]# cd /usr/local/redis-cluster/
[root@localhost redis-cluster]# ls
redis01  redis02  redis03  redis04  redis05  redis06  redis-trib.rb

7.启动所有的redis实例，可以把命令编写到.sh文件统一执行。编写startall.sh

[root@localhost redis-cluster]# vim startall.sh

startall.sh内容

cd redis01
./redis-server redis.conf
cd ..
cd redis02
./redis-server redis.conf
cd ..
cd redis03
./redis-server redis.conf
cd ..
cd redis04
./redis-server redis.conf
cd ..
cd redis05
./redis-server redis.conf
cd ..
cd redis06
./redis-server redis.conf
cd ..

8.添加文件权限，执行，启动

[root@localhost redis-cluster]# chmod +x startall.sh  

9.创建集群，这里后面跟的就是对应实例的IP:端口号，如果生成环境，就换成对应的服务器IP:端口号即可。
中间会提示是否按照这样创建集群，输入yes即可。

[[email protected] redis-cluster]# ./redis-trib.rb create --replicas 1 192.168.0.101:7001 192.168.0.101:7002 192.168.0.101:7003 192.168.0.101:7004  192.168.0.101:7005  192.168.0.101:7006 
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.0.101:7001
192.168.0.101:7002
192.168.0.101:7003
Adding replica 192.168.0.101:7004 to 192.168.0.101:7001
Adding replica 192.168.0.101:7005 to 192.168.0.101:7002
Adding replica 192.168.0.101:7006 to 192.168.0.101:7003
M: d545e0f0b6742f6f40d473b8564bc0086d6baca8 192.168.0.101:7001
   slots:0-5460 (5461 slots) master
M: fa2b24894700b59df671141b046e1e0df460593f 192.168.0.101:7002
   slots:5461-10922 (5462 slots) master
M: 370c93df267099ccd0b4781ba56972edbc02fe00 192.168.0.101:7003
   slots:10923-16383 (5461 slots) master
S: 952813f2edcf9cc2ad7e02aa4b8c1371d7f47b3c 192.168.0.101:7004
   replicates d545e0f0b6742f6f40d473b8564bc0086d6baca8
S: 0238abb208781121cfd4c864541338eb500d5127 192.168.0.101:7005
   replicates fa2b24894700b59df671141b046e1e0df460593f
S: 648d308fe6d53f08fdccbc10a53ce9db74870223 192.168.0.101:7006
   replicates 370c93df267099ccd0b4781ba56972edbc02fe00
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
。。。。。。。省略
>>> Performing Cluster Check (using node 192.168.0.101:7001)
M: d545e0f0b6742f6f40d473b8564bc0086d6baca8 192.168.0.101:7001
   slots:0-5460 (5461 slots) master
   1 additional replica(s)
S: 952813f2edcf9cc2ad7e02aa4b8c1371d7f47b3c 192.168.0.101:7004
   slots: (0 slots) slave
   replicates d545e0f0b6742f6f40d473b8564bc0086d6baca8
S: 0238abb208781121cfd4c864541338eb500d5127 192.168.0.101:7005
   slots: (0 slots) slave
   replicates fa2b24894700b59df671141b046e1e0df460593f
M: fa2b24894700b59df671141b046e1e0df460593f 192.168.0.101:7002
   slots:5461-10922 (5462 slots) master
   1 additional replica(s)
S: 648d308fe6d53f08fdccbc10a53ce9db74870223 192.168.0.101:7006
   slots: (0 slots) slave
   replicates 370c93df267099ccd0b4781ba56972edbc02fe00
M: 370c93df267099ccd0b4781ba56972edbc02fe00 192.168.0.101:7003
   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.

10.测试集群，在任意实例下都可以，启动redis-cli -h 服务器IP -p 端口号 -c
这里-c 表示在集群中间跳转。

[[email protected] redis01]# ./redis-cli -h 192.168.0.101 -p 7002 -c
192.168.0.101:7002> set a b
-> Redirected to slot [15495] located at 192.168.0.101:7003
OK
192.168.0.101:7003> get a
"b"
192.168.0.101:7003> set c d
-> Redirected to slot [7365] located at 192.168.0.101:7002
OK
192.168.0.101:7003> get c
-> Redirected to slot [7365] located at 192.168.0.101:7002
"d"

11.编写关闭脚本 shutdownall.sh，指定端口进行关闭

[root@localhost redis-cluster]# vim shutdownall.sh
[root@localhost redis-cluster]# chmod +x shutdownall.sh 
[root@localhost redis-cluster]# ./shutdownall.sh 
[root@localhost redis-cluster]# ps aux|grep redis
root      11896  0.0  0.7 136920  7548 ?        Ssl  21:26   0:02 ./redis-server 0.0.0.0:6379
root      13314  0.0  0.0 112660   960 pts/1    R+   22:41   0:00 grep --color=auto redis
[root@localhost redis-cluster]# 

--脚本内容如下
redis01/redis-cli -p 7001 shutdown
redis01/redis-cli -p 7002 shutdown
redis01/redis-cli -p 7003 shutdown
redis01/redis-cli -p 7004 shutdown
redis01/redis-cli -p 7005 shutdown
redis01/redis-cli -p 7006 shutdown