Allow to set gpgKey value for repository

[xsuchy]

I, as an admin, want to be able to set gpgKey value for a yum repository.

This is currently possible in the Pulp only if you enable signing_service. In Copr we use obs-signd for signing packages.
We want to be able to set gpgKey to the value o our choice.

Alternatively, native support for obs-signd is a solution as well.

[Conan-Kudo]

I'd prefer to see native support for obs-signd, as it would make Pulp more generally useful for other users/deployments.

[mdellweg]

Can obs-signd be triggered by a signing service script as documented here? If not, how different is a call to signd?

https://docs.pulpproject.org/pulpcore/workflows/signed-metadata.html

[dralley]

@Conan-Kudo I agree about obs-signd, would you like to file a separate issue? Or @praiskup

@mdellweg The mode of operation is a bit different and as far as I can tell (the documentation is... sparse) the primary value add is remote signing of RPM packages, though I suppose you can sign other things with it as well. Maybe someone with more background can add to this.

[Conan-Kudo]

@Conan-Kudo I agree about obs-signd, would you like to file a separate issue? Or @praiskup

@mdellweg The mode of operation is a bit different and as far as I can tell (the documentation is... sparse) the primary value add is remote signing of RPM packages, though I suppose you can sign other things with it as well. Maybe someone with more background can add to this.

You can sign RPM packages, RPM repos, Debian repos, container images, WSL images, ISOs, etc. using signd. It's a pretty flexible and generic signing system.

[praiskup]

would you like to file a separate issue? Or @praiskup

Ok, it is filled here. Though it is
kind of nice-to-have because either this issue or #2985 seems good enough for
the early Copr/PULP integration phases.