redis 集群部署--实例
1 安装环境jdk1.8.0redis 3.0.6
双机主从，192.168.1.5主 192.168.1.6从
做redis缓存服务器 用sentinel监控redis实现HA
2 安装配置
首先安装jdk环境(略，请自行调整环境)
分别安装redis-master和redis-slave
yum install -y redis
配置redis-master 192.168.1.5
vim /etc/redis.conf
daemonize yes
pidfile /var/run/redis/redis.pid
port 6379
bind 192.168.1.5
logfile /var/log/redis/redis.log
maxmemory 2165625 #内存2G
maxmemory-policy volatile-lru #内存紧张时用lru算法清除数据
appendonly yes #开启AOF持久化
appendfilename appendonly.aof
appendfsync everysec #每秒钟写一次磁盘
no-appendfsync-on-rewrite yes #日志重写，不追加命令
auto-aof-rewrite-percentage 100#AOF超过一定大小，自动启动新重写
auto-aof-rewrite-min-size 64mb#启动新重写的最小值
vim /etc/redis-sentinel.conf
port 26379
sentinel monitor mymaster 192.168.1.5 6379 1#指定要监控的机器
sentinel down-after-milliseconds mymaster 5000 #判断down机时间5秒
sentinel failover-timeout mymaster 60000 #故障转移时间1分钟
sentinel parallel-syncs mymaster 1 #通过slave确认宕机
配置redis-slave 192.168.1.6
vim /etc/redis.conf
daemonize yes
pidfile /var/run/redis/redis.pid
port 6379
bind 192.168.1.6
slaveof 192.168.1.5 6379
loglevel notice
logfile /var/log/redis/redis.log
maxmemory 2165625
maxmemory-policy volatile-lru
appendonly yes
appendfilename appendonly.aof
appendfsync everysec
no-appendfsync-on-rewrite yes
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
vim /etc/redis-sentinel.conf
port 26379
sentinel monitor mymaster 192.168.1.5 6379 1
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel parallel-syncs mymaster 1
启动redis
/usr/bin/redis-server /etc/redis.conf 先主后从
接着启动sentinel
/usr/bin/redis-sentinel /etc/redis-sentinel.conf 先主后从
测试redis集群
登录redis-master192.168.1.5
/usr/bin/redis-cli -h 192.168.1.5 -p 6379 进入客户端命令
192.168.1.5:6379 >set test 123456
ok
192.168.1.5:6379 >get test
"123456"
登上slave做同样测试
停止redis服务（注意先后顺序）
先停止sentinel服务
ps -ef |grep sentinel
kill -9 pid
接着停止slave
192.168.1.6:6379 >shutdown
最后停止master
192.168.1.5:6379 >shutdown
完成
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