helm: ServiceMonitor: sane default namespaceSelector

[awoimbee]

What this PR does / why we need it:

Makes it so that the ServiceMonitor looks for the crontroller pods in the correct namespace by default. In most, if not all setups, the ServiceMonitor is deployed to the monitoring namespace and is targeting the controller deployed in the {{ .Release.Namespace }} namespace.

I believe that with we could even remove .Values.controller.metrics.serviceMonitor.namespaceSelector, but that would be breaking.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

Fixes #7989

How Has This Been Tested?

I ran helm template, then deployed (k8s 1.21).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

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[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Arthur Woimbée (e9e108c9d22871cfd69a0bad7984fc866a3e83c7)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @awoimbee. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[kundan2707]

/check-cla

[cpanato]

@awoimbee please sign the CLA from linuxfoundation as well

[awoimbee]

@cpanato I don't understand, the bot says I signed the CLA ? (#7998 (comment))
TBH I don't remember what I signed, but I signed a lot, and I signed both as a corporate and as a personal contributor since it didn't work.
What else could I need to sign ?!

[awoimbee]

OK, well, I hate both this bot that keeps spamming and this whole CLA signing process hell.

[rikatz]

/ok-to-test

[cpanato]

lgtm just missing the chart version bump

[awoimbee]

@cpanato please let's get this over with

[cpanato]

/triage accepted
/priority important-soon
/kind cleanup

[cpanato]

/approve

[rikatz]

/lgtm
@cpanato forgot ;)
Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: awoimbee, cpanato, rikatz

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• charts/ingress-nginx/OWNERS [cpanato,rikatz]

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