I have created this container to have a working version of Netcat inside a Postgresql container. The main purpose is to test various network policies against this container.
$ docker run -it --rm -p 5432:5432 ghcr.io/michaeltrip/postgres-nc:latest$ podman run -it --rm -p 5432:5432 ghcr.io/michaeltrip/postgres-nc:latestI have created two seperate deployments, a postgres deployment with a service object running on port 8080 and a "pretending to be" postgresql container with this image with a service object running on 5432. This to simulate a network connection between those two.
After that, i can execute a shell into the nginx container and test the network connectitivy with the nc command: nc -zv postgresql.postgresql 5432, or with the curl command: curl http://postgresql.postgresql:5432.