Windows下搭建redis 哨兵环境

从 https://github.com/tporadowski/redis/releases 下载windows版的redis，自行下载解压。

关于哨兵模式的讲解，强烈推荐 【深入学习redis(4)：哨兵】

一主两从

1. 复制三份 redis.windows.conf，分别如下配置

   redis-6379.windows.conf

   bind 127.0.0.1
   port 6379
   

   redis-6380.windows.conf

   bind 127.0.1
   port 6380
   slaveof 127.0.0.1 6379
   

   redis-6381.windows.conf

   bind 127.0.1
   port 6381
   slaveof 127.0.0.1 6379
   

2. 启动

   redis-server.exe redis-6379.windows.conf
   redis-server.exe redis-6380.windows.conf
   redis-server.exe redis-6381.windows.conf
   

3. 验证是否成功，看到从节点状态 online 说明主从环境搭建成功了

   redis-cli.exe -h 127.0.0.1 -p 6379
   
   127.0.0.1:6379> info replication
   # Replication
   role:master
   connected_slaves:2
   slave0:ip=127.0.0.1,port=6380,state=online,offset=98,lag=0
   slave1:ip=127.0.0.1,port=6381,state=online,offset=98,lag=0
   master_replid:677245c1292f2244597f22a12c85730f236fa707
   master_replid2:0000000000000000000000000000000000000000
   master_repl_offset:98
   second_repl_offset:-1
   repl_backlog_active:1
   repl_backlog_size:1048576
   repl_backlog_first_byte_offset:1
   repl_backlog_histlen:98
   

三个哨兵

1. 创建三个配置文件

   sentinel-26379.windows.conf

   bind 127.0.0.1
   port 26379
   sentinel monitor mymaster 127.0.0.1 6379 2
   

   sentinel-26380.windows.conf

   bind 127.0.0.1
   port 26380
   sentinel monitor mymaster 127.0.0.1 6379 2
   

   sentinel-26381.windows.conf

   bind 127.0.0.1
   port 26381
   sentinel monitor mymaster 127.0.0.1 6379 2
   

2. 启动哨兵

   redis-server.exe sentinel-26379.windows.conf --sentinel
   redis-server sentinel-26380.windows.conf --sentinel
   redis-server sentinel-26381.windows.conf --sentinel
   

3. 验证是否成功，看到最后 status=ok 说明成功了

   127.0.0.1:26379> info sentinel
   # Sentinel
   sentinel_masters:1
   sentinel_tilt:0
   sentinel_running_scripts:0
   sentinel_scripts_queue_length:0
   sentinel_simulate_failure_flags:0
   master0:name=mymaster,status=ok,address=127.0.0.1:6379,slaves=2,sentinels=3
   

4. 演示故障自动切换

   关掉主节点 6379，等一会，就会发现哨兵切换了主节点，重新启动 6379 节点，它就变成了从节点了

   redis-cli.exe -h 127.0.0.1 -p 6379
   
   127.0.0.1:6379> info replication
   # Replication
   role:slave
   master_host:127.0.0.1
   master_port:6380
   master_link_status:up
   master_last_io_seconds_ago:1
   master_sync_in_progress:0
   slave_repl_offset:56440
   slave_priority:100
   slave_read_only:1
   connected_slaves:0
   master_replid:8f282577c2e4ddeb9794f88757e5dad7870e5e6d
   master_replid2:0000000000000000000000000000000000000000
   master_repl_offset:56440
   second_repl_offset:-1
   repl_backlog_active:1
   repl_backlog_size:1048576
   repl_backlog_first_byte_offset:55487
   repl_backlog_histlen:954
   

遇到的问题

代码客户端连接redis，报错 All sentinels down, cannot determine where is mymaster master is running... 或者 Could not get a resource from the pool

参考这篇博客：https://www.jianshu.com/p/098494958892

待明天验证，先睡觉了