Is the Artifact Registry Plugin (ar-plugin) compatible with microdnf?
We're trying to use Cloud Builder with redhat/ubi8-minimal which uses a slimmed down version of dnf named microdnf. It has the same commands as dnf so we hoped it would work alike, however we just can't get authenticated for our private repository. I'm now suspecting that since it "uses libdnf and hence doesn't require Python" the plugin may not work.
No, Artifact Registry does not officially support microdnf so it might not be compatible.However, the plugin has official support for dnf. You can refer to this document
If you would like to see this supported in the future, you can file a feature request for it following these steps. Please note that feature requests do not provide any implementation guarantees.
It seems that the ar-plugin doesn't work with microdnf, however installing the plugin installs dnf, so we just switched to dnf at that point.
The authentication problem persisted however. In the end we found how to turn debug on for the plugin and found it was timing out on the metadata server request. We eventually found the solution was to enable the cloudbuild network in the docker build step.