If you need to test your system with High-availability Redis Sentinels, you need to setup sentinels locally.

This repo provide simple script and step to set it up.

Steps

1. Install Redis. For Mac OS I recommend brew install redis
2. Run start.sh

In this setup, we have 3 Redis instances

1. Master Redis at port 6380
2. Slave Redis at port 6381
3. Redis Sentinels at port 26379

The slave Redis is a replicate of Master redis. It's act as a fallback Redis.

Now if you use any driver and connect to sentinels at 26379, now you have High-availability setup for Redis.

The most simple test you can run is to connect to sentinels, shutdown the Redis at 6380 port by using SHUTDOWN command and see if your connection still works. It should take around 500 milliseconds to automatically reconnect to Redis at port 6381.