Redis 哨兵模式 带密码单机

语法 https://segmentfault.com/a/1190000002680804

启动3台redis 6379，6380，6381

cp 多个redis.conf文件
开启daemonize yes
PID文件名字
端口
log文件名字
dump.rdb名字

requirepass 密码

更改从机的masterauth密码 和requirepass密码一致.

下载的redis 有默认的sentinel.conf默认配置文件

touch sentinel.conf.创建一个哨兵配置文件

  #1表示在sentinel集群中只要有1个sentinel认为master死了, 就算真的死了,
  #集群的时候sentinel也是多个

  
  sentinel monitor mymaster 127.0.0.1 6380 1

#如果10秒后,mysater仍没活过来，则启动failover(主备切换)
#sentinel 会给master发送心跳PING来确认
sentinel down-after-milliseconds mymaster 3000

#指定多少个slave同时对新matster同步, 值越小耗时越长，越大多个slave因为replication不可以
#设定为1 每次只有1个slve处于不可以处理命令请求状态
sentinel failover-timeout mymaster 10000

#后台执行
daemonize yes

#指定工作目录
dir "/usr/local/redis/sentinel-work"

protected-mode no

logfile "/usr/local/redis/sentinel-log/sentinel.log"

#主 的密码
sentinel auth-pass mymaster bb123456
# Generated by CONFIG REWRITE
port 26379

执行redis-server redis.conf启动redis

执行redis-cli -p 6379 [6380,6381] 进入redis客户端查看info replication信息,

运行sentinel有两种方式：

redis-sentinel /path/to/sentinel.conf

redis-server   /path/to/sentinel.conf --sentinel

主从切换日志

10671:X 20 Jun 12:45:55.951 # +sdown master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:55.951 # +odown master mymaster 127.0.0.1 6379 #quorum 1/1
10671:X 20 Jun 12:45:55.951 # +new-epoch 2
10671:X 20 Jun 12:45:55.951 # +try-failover master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:55.954 # +vote-for-leader 0bc851c61ce22b98c9b3c7857f240721a5d6c9b5 2
10671:X 20 Jun 12:45:55.954 # +elected-leader master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:55.954 # +failover-state-select-slave master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:56.038 # +selected-slave slave 127.0.0.1:6381 127.0.0.1 6381 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:56.038 * +failover-state-send-slaveof-noone slave 127.0.0.1:6381 127.0.0.1 6381 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:56.128 * +failover-state-wait-promotion slave 127.0.0.1:6381 127.0.0.1 6381 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:57.020 # +promoted-slave slave 127.0.0.1:6381 127.0.0.1 6381 @ mymaster 127.0.0.1 6379 选举6381作为新的主机
10671:X 20 Jun 12:45:57.020 # +failover-state-reconf-slaves master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:57.080 * +slave-reconf-sent slave 127.0.0.1:6380 127.0.0.1 6380 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:58.027 * +slave-reconf-inprog slave 127.0.0.1:6380 127.0.0.1 6380 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:58.027 * +slave-reconf-done slave 127.0.0.1:6380 127.0.0.1 6380 @ mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:58.088 # +failover-end master mymaster 127.0.0.1 6379
10671:X 20 Jun 12:45:58.088 # +switch-master mymaster 127.0.0.1 6379 127.0.0.1 6381　　                 切换81为新的主机
10671:X 20 Jun 12:45:58.088 * +slave slave 127.0.0.1:6380 127.0.0.1 6380 @ mymaster 127.0.0.1 6381
10671:X 20 Jun 12:45:58.088 * +slave slave 127.0.0.1:6379 127.0.0.1 6379 @ mymaster 127.0.0.1 6381      
10671:X 20 Jun 12:46:01.162 # +sdown slave 127.0.0.1:6379 127.0.0.1 6379 @ mymaster 127.0.0.1 6381