Manage software repositories

Mirror the internal package repository to the new storage node. Sync the apt and yum repos from repo-master, verify GPG signatures, update the repo metadata, and point repo-client1 and repo-client2 to the new node in that order. Make sure clients can install a test package and that the repo has correct pool permissions before retiring the old mirror.

Before I present this repo migration to the platform team, make the repository layout easy to approve. Put the retention policy and storage footprint up top, make package signing and metadata updates immediate to verify, flag any packages with mismatched checksums, and call out clients or CI jobs that will need their sources.list or yum.repos.d changed.

We switched two CI runners to the new mirror and now their apt installs fail with 404s. The build owners are complaining and a release is blocked. I do not know whether the metadata update failed, the path layout is different, or the GPG keys aren’t trusted on the runners. What is the fastest way to diagnose and restore installs with minimal churn to the runners?

Every time we migrate or reorganize our package repos, at least one CI job breaks and takes hours to trace to a missing path or key. This drains the platform team and delays releases. Where are we repeatedly dropping the ball, and what one habit would prevent these recurring post-migration outages?