k8sbot is sending too many github notifications via adding reviewers

[illume]

The automated adding of folks to PRs as reviewers has severely impacted our ability to read github notifications.

Over time it effectively adds EVERY single reviewer to most PRs. Which means every person is being pinged for every bit of activity on most PRs.

It adds two at random, and then up to two more each time the PR changes state (like in and out of draft mode).

Additionally, it seems to just choose people at random:

• Not if they know that part of the codebase well
• Not if they are on vacation, or are busy with other tasks
• It has no understanding of draft PRs, and pings two people even if people purposely put PRs into draft mode because they don't want to ping maintainers.

It has negatively impacted our productivity in a severe way.

What to do?

Some possibilities.

• Maybe there's a way to configure it to be quiet.
• We can raise a support ticket with the k8sbot maintainers
• We can try and disable it until it's fixed

[illume]

I think I figured out where and how to disable it.

• Stop requesting reviewers for kubernetes-sigs/headlamp repo kubernetes/test-infra#35735