redis 集群搭建

1.redies版本,redis-5.0.7,(注意：5.0版本之后将不再需要ruby)准备三台centos 7的机器：如下图机器的分配情况(每台机器关闭防火墙)：

主从方式：三主三备
IP	            master节点	        salve节点
192.168.0.220	wintop_redies1:7001	wintop_redies1:7002
192.168.0.221	wintop_redies2:7001	wintop_redies2:7002
192.168.0.222	wintop_redies3:7001	wintop_redies3:7002

2.如果centos中没有gcc环境，则需要先安装gcc。如果有就直接看下一步。

[root@localhost tools]# yum install -y gcc 

3.解压redis包到当前目录下

[root@localhost tools]# tar -zxvf redis-5.0.7.tar.gz 

4.进入刚解压出来的redis目录，开始编译安装

[root@localhost tools]# cd redis-5.0.5/ [root@localhost redis-5.0.5]# make && make PREFIX=/usr/local/redis install 

5.看是否编译安装成功，执行 如下命令，如果输出0 表示redis安装成功了

[root@localhost redis-5.0.5]# echo $? 
0 

6.配置环境变量，在/etc/profile文件最后添加如下内容：

[root@localhost tools]# vim /etc/profile 
###### redis env ######
export REDIS_HOME=/usr/local/redis
export PATH=$PATH:$REDIS_HOME/bin

7.分别创建两个7001和7002的配置文件目录conf，日志目录logs，数据存储目录data，如下命令：

mkdir -p /usr/local/redis/redis_cluster/7001/conf/ 
mkdir -p /usr/local/redis/redis_cluster/7001/logs/ 
mkdir -p /usr/local/redis/redis_cluster/7001/data/  
mkdir -p /usr/local/redis/redis_cluster/7002/conf/ 
mkdir -p /usr/local/redis/redis_cluster/7002/logs/ 
mkdir -p /usr/local/redis/redis_cluster/7002/data/ 

8.建7001的配置文件，并添加如下内容：

vim /usr/local/redis/redis_cluster/7001/conf/redis.conf  

# 绑定服务器域名或IP地址 
bind 192.168.0.200 
# 设置端口，区分集群中Redis的实例 
port 7001 
# 后台运行 
daemonize yes 
# pid进程文件名，以端口号命名 
pidfile /var/run/redis-7001.pid 
# 日志文件名称，以端口号为目录来区分 
logfile /usr/local/redis/redis_cluster/7001/logs/redis.log 
# 数据文件存放地址，以端口号为目录名来区分 
dir /usr/local/redis/redis_cluster/7001/data 
# 启用集群 
cluster-enabled yes 
# 配置每个节点的配置文件，同样以端口号为名称 
cluster-config-file nodes_7001.conf 
# 配置集群节点的超时时间 
cluster-node-timeout 15000 
# 启动AOF增量持久化策略 
appendonly yes 
# 发生改变，则记录日志 
appendfsync always

9.创建7002的配置文件，并添加如下内容：

vim /usr/local/redis/redis_cluster/7002/conf/redis.conf  

# 绑定服务器域名或IP地址 
bind 192.168.0.200
# 设置端口，区分集群中Redis的实例 
port 7002 
# 后台运行 daemonize yes 
# pid进程文件名，以端口号命名 
pidfile /var/run/redis-7002.pid 
# 日志文件名称，以端口号为目录来区分 
logfile /usr/local/redis/redis_cluster/7002/logs/redis.log 
# 数据文件存放地址，以端口号为目录名来区分 
dir /usr/local/redis/redis_cluster/7002/data 
# 启用集群 
cluster-enabled yes 
# 配置每个节点的配置文件，同样以端口号为名称 
cluster-config-file nodes_7002.conf 
# 配置集群节点的超时时间 
cluster-node-timeout 15000 
# 启动AOF增量持久化策略 
appendonly yes 
# 发生改变，则记录日志 
appendfsync always

以上流程以220为例，其他节点相同

10.在保证上面220，221，222都配置完成后，开始启动220，221，222各节点,所有节点执行启动命令

redis-server /usr/local/redis/redis_cluster/7001/conf/redis.conf 
redis-server /usr/local/redis/redis_cluster/7002/conf/redis.conf

11.查看各机器上的各节点是否都启动成功

[root@wintop-redies3 ~]# ps -ef | grep redis
root       2681      1  0 14:46 ?        00:00:00 redis-server 192.168.0.222:7001 [cluster]
root       2687      1  0 14:47 ?        00:00:00 redis-server 192.168.0.222:7002 [cluster]
root       2713   2695  0 14:49 pts/1    00:00:00 grep --color=auto redis

12.使用 reids-cli 创建Redis集群 (注：这里必须使用IP)

redis-cli --cluster create 192.168.0.220:7001 192.168.0.221:7001 192.168.0.222:7001 192.168.0.220:7002 192.168.0.221:7002 192.168.0.222:7002 --cluster-replicas 1 

13.查看我们刚创建集群的状态，如下命令：(在3台集群中的任意一台机器查看任意节点都一样，会带出所有的节点信息)

[root@wintop-redies1 ~]# redis-cli --cluster check 192.168.0.220:7001
192.168.0.220:7001 (41cff485...) -> 1 keys | 5461 slots | 1 slaves.
192.168.0.222:7001 (feee6a96...) -> 1 keys | 5461 slots | 1 slaves.
192.168.0.221:7001 (6f76ed7d...) -> 0 keys | 5462 slots | 1 slaves.
[OK] 2 keys in 3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node 192.168.0.220:7001)
M: 41cff4851ba6855e61fb3535dd53d329026587de 192.168.0.220:7001
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
M: feee6a9623c65d41e0a3cfec2549ab8102c4d3e3 192.168.0.222:7001
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: eef0f0520546060ffb9c4b276b1aacdc8e68e964 192.168.0.221:7002
   slots: (0 slots) slave
   replicates 41cff4851ba6855e61fb3535dd53d329026587de
M: 6f76ed7df33775a9cb7c3ce12fd28a527f942ec1 192.168.0.221:7001
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 03e1579a63f773fe8ff0df25d09cea8d2449f1b6 192.168.0.220:7002
   slots: (0 slots) slave
   replicates feee6a9623c65d41e0a3cfec2549ab8102c4d3e3
S: a4737f4c75d6c70aef37ce0a5f163afd7502eb67 192.168.0.222:7002
   slots: (0 slots) slave
   replicates 6f76ed7df33775a9cb7c3ce12fd28a527f942ec1
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

14.测试集群是否正常：在集群中的任意一台测试都可以，如我们可以在220上连接221上的7002节点并添加一个数据

[root@wintop-redies1 ~]# redis-cli -c -h 192.168.0.220 -p 7002
192.168.0.220:7002> set key001 xty_test
-> Redirected to slot [12657] located at 192.168.0.222:7001
OK
192.168.0.222:7001> get key001
"xty_test"
192.168.0.222:7001> 

15.再去221上连接7001节点和222上连接7001或者7002看是否可以查询到数据

[root@wintop-redies2 ~]# redis-cli -c -h 192.168.0.221 -p 7001
192.168.0.221:7001> get key001
-> Redirected to slot [12657] located at 192.168.0.222:7001
"xty_test"

[root@wintop-redies3 ~]# redis-cli -c -h 192.168.0.222 -p 7002
192.168.0.222:7002> get key001
-> Redirected to slot [12657] located at 192.168.0.222:7001
"xty_test"

16.如果需要配置开机自启动，添加如下两行：(每台机器都要配置)，保存退出即可。以后开机就会自动启动集群

[root@localhost redis-5.0.7]# vim /etc/rc.local  
/usr/local/redis/bin/redis-server /usr/local/redis/redis_cluster/7001/conf/redis.conf 
/usr/local/redis/bin/redis-server /usr/local/redis/redis_cluster/7002/conf/redis.conf

17.如果上面设置了，还是不能开机自启动，则有可能是/etc/rc.d/rc.local没有执行权限，需要给一个执行权限，如下：

[root@localhost redis-5.0.7]# chmod +x /etc/rc.d/rc.local