Redis 自动故障转移sentinel

最近看了Redis自动故障转移Sentinel（哨兵），故将笔记记在次处
注意，实际环境中是，多台机器，本文只是测试，所以在一台机器上配置多个Redis实例，以达到实验的目的

Redis Sentinel(哨兵)

7000配置文件

port 7000 
daemonize yes 
pidfile /var/run/redis-7000.pid 
logfile "7000.log" 
dbfilename "dump-7000.rdb" 
appendonly yes 
appendfilename "appendonly-7000.aof" 
dir "/data/redis"
 
配置文件编写

sed 's/7000/7001/g' redis-7000.conf >>redis-7001.conf
sed 's/7000/7002/g' redis-7000.conf >>redis-7002.conf
cat redis-7001.conf
cat redis-7002.conf
cat redis-7000.conf
 
设置主从关系

echo "slaveof 192.168.1.108 7000" >>redis-7001.conf
echo "slaveof 192.168.1.108 7000" >>redis-7002.conf
 
启动三台redis server

redis-server /etc/redis/redis-7000.conf
redis-server /etc/redis/redis-7002.conf
redis-server /etc/redis/redis-7001.conf
ps -ef | grep redis
 
查看redis 7000端口的复制信息

PHP

127.0.0.1:7000> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.108,port=7001,state=online,offset=43,lag=1
slave1:ip=192.168.1.108,port=7002,state=online,offset=43,lag=1
master_repl_offset:43
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:42
 
配置sentinel

vim redis-sentinel-26379.conf

port 26379 
daemonize yes 
pidfile /var/run/redis-26379.pid
logfile "26379.log"
dir /data/redis
sentinel monitor mymaster 192.168.1.108 7000 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
 
生成配置文件

sed 's/26379/26380/g' redis-sentinel-26379.conf >> redis-sentinel-26380.conf
sed 's/26379/26381/g' redis-sentinel-26379.conf >> redis-sentinel-26381.conf
 
启动哨兵

PHP

[root@CentOS redis]# redis-sentinel redis-sentinel-26379.conf
[root@CentOS redis]# redis-sentinel redis-sentinel-26380.conf
[root@CentOS redis]# redis-sentinel redis-sentinel-26381.conf
 
[root@CentOS redis]# ps -ef | grep redis-sentinel| grep -v 'grep'
root      2677     1  0 02:36 ?        00:00:00 redis-sentinel *:26379 [sentinel]
root      2681     1  0 02:36 ?        00:00:00 redis-sentinel *:26380 [sentinel]
root      2685     1  0 02:36 ?        00:00:00 redis-sentinel *:26381 [sentinel]
 
接下来可以测试哨兵的功能了，代码太多就不粘贴上来了，至此Redis自动故障转移简单模型已经完成