No matter what I do, I only ever get a 404 or Error: invalid reference format
I think it should be podman pull hub.docker.com/_/postgres
but this doesn't work. I've also tried
podman pull hub.docker.com/postgres
podman pull hub.docker.com/__/postgres
podman pull hub.docker.com/library/postgres
Any ideas what's needed here to grab any of the official images from Docker Hub?
In order to pull images from Docker Hub using podman, the image name needs to be prefixed by the docker.io/ registry name.
To get the 'official images' they are part of the 'library' collection.
So to pull Postgres from Docker Hub using Podman, the command is
podman pull docker.io/library/postgres