[redis] linux下哨兵篇(3)
#三台都修改为以下同样配置# grep -Ev "^$|#" /usr/local/src/redis-3.2.4/sentinel.conf> /etc/redis/sentinel.conf
# vim /etc/redis/sentinel.conf
port 26379 #sentinel监听端口
daemonize yes #以daemon形式运行在后台
logfile /var/log/sentinel.log #日志文件
dir /tmp
sentinel monitor mymaster 192.168.56.101 6379 2 #监控mymaster组，master地址，端口，quorum次数
sentinel down-after-milliseconds mymaster 5000#5000毫秒即5秒连续不能连通master，认为master挂掉
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 60000 #故障切换超时时间
sentinel auth-pass mymaster mima #密码认证
protected-mode no #默认情况下sentinel只监听环回地址，这样就导致sentinel之间不能通信，可以改为监听网卡或者关闭protected-mode
#三台都启动
# /usr/local/redis/bin/redis-sentinel /etc/redis/sentinel.conf
#查看sentinel启动日志
#正常情况下可以看到+sentinel-address-switch字样
# more /var/log/sentinel.log
24470:X 08 Dec 10:53:12.205 * Increased maximum number of open files to 10032 (it was originally set to 1024).
_._
_.-``__ ''-._
_.-`` `.`_.''-._ Redis 3.2.4 (00000000/0) 64 bit
.-`` .-```.```\/ _.,_ ''-._
( ' , .-`| `, ) Running in sentinel mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 26379
| `-._ `._ / _.-' | PID: 24470
`-._ `-._`-./_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
24470:X 08 Dec 10:53:12.206 # Sentinel>
24470:X 08 Dec 10:53:12.206 # +monitor master mymaster 192.168.56.101 6379 quorum 2
24470:X 08 Dec 10:53:14.321 * +sentinel-address-switch master mymaster 192.168.56.101 6379 ip 192.168.56.102 port 26379 for fae94df5596af315af0f5f97fe7ade3fad0b8a98
24470:X 08 Dec 10:53:14.336 * +sentinel-address-switch master mymaster 192.168.56.101 6379 ip 192.168.56.103 port 26379 for 8ea722390cabf3ad304b20f8cc42157603d21d84
#需要注意的地方，一旦启动sentinel服务后，服务会自动修改sentinel配置文件/etc/redis/sentinel.conf
# cat /etc/redis/sentinel.conf
port 26379
daemonize yes
dir "/tmp"
logfile "/var/log/sentinel.log"
sentinel myid 106e22fad7ad280b2c38542c164f7060b6587d68
sentinel monitor mymaster 192.168.56.101 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster mima
protected-mode no
# Generated by CONFIG REWRITE
sentinel config-epoch mymaster 0
sentinel leader-epoch mymaster 0
sentinel known-slave mymaster 192.168.56.102 6379
sentinel known-slave mymaster 192.168.56.103 6379
sentinel known-sentinel mymaster 192.168.56.103 26379 8ea722390cabf3ad304b20f8cc42157603d21d84
sentinel known-sentinel mymaster 192.168.56.102 26379 fae94df5596af315af0f5f97fe7ade3fad0b8a98
sentinel current-epoch 0
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