Are you trying to use cache-from? This is explicitly not supported:
> --cache-from
> Images to utilize as potential cache sources. Podman does not currently support caching so this is a NOOP.
> --cache-from
> Images to utilize as potential cache sources. Podman does not currently support caching so this is a NOOP.
On my local computer (Arch) podman is v2.1.1, which seems to have whatever bug I was hitting fixed.
So I guess my complaint isn't about podman specifically-- It had bugs and they were fixed, and that's great. But I hate that RHEL 8 touts it as a docker replacement, and won't carry docker in their repositories, when the version they have in their production releases is so broken.
We eventually sledgehammered docker CE's CentOS repo into our RHEL 8 jenkins server and now everything works perfectly.
Running podman on the production webservers seems to work okay though-- apart from the process killing problems.
You can get access to Moby in Fedora, but it just wasn't viable to include docker in RHEL 8 for both legal and community risks.