Redis Automatic fault Transfer Sentinel

Recently saw the Redis automatic Failover Sentinel (Sentinel), so take notes at the second place
Note that in the real world, multiple machines, this article is just testing, so configure multiple Redis instances on a single machine to achieve the purpose of the experiment

Redis Sentinel (Sentinel)

7000 Configuration Files

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"

Configuration file Authoring

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

Set up master-slave relationships

echo "slaveof 192.168.1.108 7000" >>redis-7001.conf
echo "slaveof 192.168.1.108 7000" >>redis-7002.conf

Launch three Redis servers

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

View replication information for Redis 7000 ports

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

Configure 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

Build configuration file

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

Start the Sentry.

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]
 
You can then test the function of the sentry, too much code will not be pasted up, This Redis automatic failover simple model has completed