docs: common questions for Rollbacks

[kostis-codefresh]

Signed-off-by: Kostis Kapelonis [email protected]

Answering some questions for rollbacks that I see multiple people asking over and over in the Slack channels.

Checklist:

• [X] Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• [X] The title of the PR is (a) conventional, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• [X] I've signed my commits with DCO
• [ ] I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• [ ] My builds are green. Try syncing with master if they are not.
• [ ] My organization is added to USERS.md.

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Merging #2027 (20ed27d) into master (59f949c) will not change coverage. The diff coverage is n/a.

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[pragmaticivan]

Would you mind adding a comment about low traffic canary services to avoid inconclusive releases (and might cause a rollback) where metrics are not generated due to 0 or low traffic?

Perhaps an example with parallel smoke tests with the duration of the projected canary?

[kostis-codefresh]

@pragmaticivan Any examples that you are interested in should go on a separate PR. That being said, if you think that the FAQ for rollbacks should be extended, I think it is best to open your own PR and discuss it there. I prefer to focus on a single thing on each PR.