This is useful for local development and CI , you have 1 master, 1 slave and 1 sentinel with docker containers.
Note: The sentinel Dockerfile is heavily borrowed and inspired by redis-cluster-with-sentinel.
> ./start.sh`
If you see the console output as follows, you have set up the sentinel!
docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------
redis_master docker-entrypoint.sh redis ... Up 0.0.0.0:6379->6379/tcp
redis_sentinel sentinel-entrypoint.sh Up 0.0.0.0:26379->26379/tcp, 6379/tcp
redis_slave docker-entrypoint.sh redis ... Up 6379/tcp, 0.0.0.0:6380->6380/tcp
> redis-cli -p 26379
127.0.0.1:26379> sentinel master mysentinel
1) "name"
2) "mysentinel"
3) "ip"
4) "192.168.1.5"
5) "port"
6) "6379"
7) "runid"
8) ""
...
192.168.1.5 is my IP but you should find your local en0 IP.