1.從docker倉庫拉取redis鏡像

            docker?pull?redis
          

2.在/home下分別創建redis-6379-data，redis-6380-data，redis-6381-data

3.拷貝/etc/redis/redis.conf 到 /home下

4.復制redis.conf為redis-6379.conf， redis-6380.conf，redis.6381.con并且分別修改其中的配置， logfile指定不同的文件

            port?6380
?
logfile?"redis-6380.log"
?dir?/data
?
appendonly?yes
?
appendfilename?appendonly.aof
?
slaveof?127.0.0.1?6379
          

5.docker啟動3個redis

            docker?run?-tdi?-v?/home/data:/data?/home/redis-6379.conf:/usr/local/ect/redis/redis.conf?-p?6379:6379?redis
          

            docker?run?-tdi?-v?/home/data:/data?/home/redis-6380.conf:/usr/local/ect/redis/redis.conf?-p?6380:6380?redis
          

            docker?run?-tdi?-v?/home/data:/data?/home/redis-6381.conf:/usr/local/ect/redis/redis.conf?-p?6381:6381?redis
          

6.通過redis-cli分別連入創建好的redis服務器，測試主從是否配好

7.配置redis-sentinelm，創建三個sentinel文件,內容如下

            port?26379
?
dir?"/data"
?logfile?"sentinel-26379.log"
?sentinel?monitor?mymaster?127.0.0.1?6379?2
?
sentinel?down-after-milliseconds?mymaster?10000
?
sentinel?failover-timeout?mymaster?60000
          

只修改日志的文件名即可

8.通過docker啟動三個sentinel

            docker?run?-dit?-v?/home/sentinel-26379.conf:/usr/local/etc/redis/sentinel.conf?-p?26379:26379?redis??redis-sentinel?/usr/local/etc/redis/sentinel.conf
          

            docker?run?-dit?-v?/home/sentinel-26380.conf:/usr/local/etc/redis/sentinel.conf?-p?26380:26380?redis??redis-sentinel?/usr/local/etc/redis/sentinel.conf
          

            docker?run?-dit?-v?/home/sentinel-26381.conf:/usr/local/etc/redis/sentinel.conf?-p?26381:26381?redis??redis-sentinel?/usr/local/etc/redis/sentinel.conf
          

9.停止redis的master節點

docker stop master節點的containerid

10.連入從節點，查看主從狀態

            redis-cli?-p?6380
info?replication
          

11.稍等幾十秒，從節點就會自動變成主節點

哨兵模式的原理采用了心跳機制和投票裁決機制。