How can I check, if Redis REALLY works?

[fossil jackal]

The settings can turn Redis on or off, but how can I really check, if Redis is used as a cache? Is there a way to "look into" Redis like it can be done with phpmyadmin, when I want to inspect a MariaDB? Or pgadmin for PostGres?

[grim patio]

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[trail imp]

You can use something like https://github.com/RedisInsight/RedisInsight to inspect your redis instance(s).

[fossil jackal]

Thank you, @trail imp ! Would you happen to know how to setup this tool with a local Docker instance? I use these instructions:
https://docs.redis.com/latest/ri/installing/install-docker/
https://collabnix.com/running-redisinsight-using-docker-compose/
and currently have this in my docker-compose.yml:

[...]

networks:
    default:
        name: dk

services:
  dk_database:
    image: mariadb:lts
    [...]

  dk_cache:
    image: redis:7.0-alpine

  dk_directus:
    image: directus/directus:10.5.2
    [...]
  
  dk_redisinsight:
    image: redislabs/redisinsight:latest
    ports:
      - "8001:8001"
    depends_on:
      - dk_database
      - dk_cache
    volumes:
      - ????

An interface opens, but it requires configuration. I do find examples where a volumes parameter is given. But I have no idea what that parameter would be in my case. How can I find that out?

[fossil jackal]

I had a little bit of success configuring the Redis on that form that pops up on localhost:8001. However, I would rather not have to do that each an every time. Is there a way to persist that connection info?
Also: Why is there no volumes configuration for the cache service in the docker-compose.yml? Would it be possible to define a volumes paramter for the Redis cache there?

[solid quiver]

https://redis.io/docs/ui/cli/

[fossil jackal]

@solid quiver Thank you! – Do you happen to know why Directus's configuration section for Redis (in the docker-compose.yml) doesnot use the volumes parameter?

[trail imp]

You don't need a volume in general - volumes are for persistent storage.
But if you have a volume, you also need to define the volume, like:

services:
  dk_redisinsight:
    image: redislabs/redisinsight:latest
    ports:
      - "8001:8001"
    depends_on:
      - dk_database
      - dk_cache
    volumes:
      - myvolume
 volumes:
  myvolume:

Or you can create a volume for the path you are in, like:

services:
  dk_redisinsight:
    image: redislabs/redisinsight:latest
    ports:
      - "8001:8001"
    depends_on:
      - dk_database
      - dk_cache
    volumes:
      - ./myvolume

The last will creat a folder named myvolume in your path.

[solid quiver]

Mikke is exactly right 🙂 It's no requirement for the cache to be persisted but you can if you want

[fossil jackal]

@solid quiver & @trail imp Thank you very much! I will dig into that and see what happens! Might come back again with more question... 🙂