Thanks @unman.
It looks like the template-cacher TemplateVM was created based on my Global default template (fedora-38-minimal) and therefore did not install apt-cacher-ng (obviously) or qubes-core-agent-networking (less obvious).
Even after manually installing those packages, my Fedora TemplateVMs error out when updating over clearnet (not TOR or VPN) connections.
Errors during downloading metadata for repository ‘updates’:
Status code: 403 forhttp://HTTPS///mirrors.fedoraproject.org/metalink?repo=updates-released-f38&arch=x86_64&protocol=http(IP: 127.0.0.1)
Error: Failed to download metadata for repo ‘updates’: Cannot prepare internal mirrorlist: Status code: 403 forhttp://HTTPS///mirrors.fedoraproject.org/metalink?repo=updates-released-f38&arch=x86_64&protocol=http(IP: 127.0.0.1)
I then tried to uninstall 3isec-qubes-cacher-1.10-1 from dom0 via sudo dnf remove 3isec-qubes-cacher-1.10-1.fc32.x86_64 to try to reinstall it with debian-11 set as the Global default template. The PRERUN scriptlet appeared to run, but also fail:
error: %preun(3isec-qubes-cacher-1.10-1.fc32.x86_64) scriptlet failed, exit status 20
Error in PREUN scriptlet in rpm package 3isec-qubes-cacher
Verifying : 3isec-qubes-cacher-1.10-1.fc32.x86_64 1/1
Failed:
3isec-qubes-cacher-1.10-1.fc32.x86_64
Is the 403 error still a known issue? And if so, how do we “clear the cacher before trying another update”?
How should cacher be uninstalled? I found this unanswered forum post while trying to troubleshoot my unsuccessful uninstall and reinstall of cacher.