Redis 4.x Cookbook

How it works...

In step 1, we prepared a configuration file for the Redis Sentinel processes. There is a sample sentinel.conf file in the Redis source code package, so in this example we just made changes on top of it. As mentioned, Redis Sentinel is a guard process for Redis data servers, therefore it has to listen to a different port than the data server's port. The default port for Redis Sentinel is 26379. To add a new master server to the Sentinel for monitoring, we can add a line to the configuration file in the format of sentinel monitor <master-name> <ip> <port> <quorum>.

In this example, sentinel monitor mymaster 192.168.0.31 6379 2 means the Sentinel is going to monitor the master server on 192.168.0.31:6379, which is named mymaster ...