Remove biased annotations from prometheus.service.annotations

[den-is]

Why is this pull request needed and what does it do?

Makes the default prometheus.service.annotations blank {} map. Removing any bias.

Which issues (if any) are related?

Fixes https://github.com/coredns/helm/issues/157

Checklist:

• [x] I have bumped the chart version according to versioning.
• [x] I have updated the chart changelog with all the changes that come with this pull request according to changelog.
• [x] Any new values are backwards compatible and/or have sensible default.
• [x] I have signed off all my commits as required by DCO.

Changes are automatically published when merged to main. They are not published on branches.

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[hagaibarel]

This would potentially break exiting installations that rely on this values being set by default

[den-is]

@hagaibarel correct. well, c'est la vie. But this is easy to fix for anyone. Currently I'm kinda fixing my setup for myself too, by providing null and I could ignore the "issues" completely. I just wanted to make this chart for the community better. Otherwise for how long are you going to haul this """not-that-smart""" non-standard piece in values.yaml?

[hagaibarel]

c'est la vie

This isn't my preferred way of maintaing an OSS project where we have a community and users to support. If we wanted to introduce a change that would break people's exiting installation, this should have been a major version release, not a patch (or even a minor).

Otherwise for how long are you going to haul this """not-that-smart""" non-standard piece in values.yaml?

Given that there isn't a "standard" in values file, it's common to provide sane defaults with an option to override / change them.

Bottom line, I don't think this change has any meaningful value

[den-is]

added comment to the issue. I can bump chart version to 2.0.0

[hagaibarel]

I don't think this change justifies bumping a major version, nor has any significant value.

There is an option to override the annotations if needed, and the defaults make sense and fit most use cases.

[den-is]

The override option is not functioning 100% as one would think by default and is not covering all cases.

[hagaibarel]

Can you provide a real world use case from your experience where overriding didn't address the issue?

[den-is]

Can you provide a real world use case from your experience where overriding didn't address the issue?

I have provided exact example in the original issue linked to this PR. Real world fact is that maps in Helm are not overridden but merged.