Trouble Connecting Containers in the Same Pod with Cilium

Typically, it's better to have those containers as separate pods. It looks like your addressing and ports might not be quite right, which could be contributing to the connection issue.

It seems like you might be transitioning from Docker and expecting automatic DNS resolution for the Redis container. In Kubernetes, if both containers are in the same pod, they share the same network. That means you could directly connect to Redis using 'redis://127.0.0.1:6379'. Alternatively, a more standard approach would be to separate them into different pods, create a service for Redis, and then point your paperless app to the service's DNS address like 'redis://..svc.cluster.local'.

When you have multiple containers in the same pod, they indeed share the same network namespace, so if you're trying to connect to Redis, you could just use '127.0.0.1'.

You should avoid having both containers in the same pod. If you try scaling later, like going to two instances, it could create a problem with your Redis setup. Remember, Kubernetes has an IP per pod rather than per container, and so you would connect via 'redis://localhost:6379' since they're part of the same pod.