🌱 observability: move metrics to config and use sidecar in kube-state-metrics

[chrischdi]

What this PR does / why we need it:

This PR:

• moves the metrics configuration from hack/observability/kube-state-metrics to config/metrics.
• adds a ClusterRole in config/metrics/crd-clusterrole.yaml for the aggregated clusterrole for kube-state-metrics
• adds a kustomization.yaml to config/metrics which includes the above two
• Changes to the kustomization of kube-state-metrics:
  • Adds a patch to add a sidecar container to kube-state-metrics which
    • periodicly lists configmaps in namespace observability which have the label kube-state-metrics/custom-resource set
    • combines the yamls of the configmaps to a single configuration file for kube-state-metrics
    • updates the config file for kube-state-metrics so it reloads the configuration automatically
  • Adds a aggregated clusterrole + clusterrole binding so providers can dynamically add additional rbac rules to allow kube-state-metrics to watch the relevant resources
• Changes to tilt up:
  • Adds a configuration option deploy_kustomizations which allows to define paths to additional kustomizations which then get deployed to the cluster
    • Example usage: to reference a kustomization which adds a configuration + clusterrole for additional kube-state-metrics crd configuration.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

/area observability

[k8s-ci-robot]

@chrischdi: The label(s) area/observability cannot be applied, because the repository doesn't have them.

In response to this:

What this PR does / why we need it:

This PR:

• moves the metrics configuration from hack/observability/kube-state-metrics to config/metrics.
• adds a ClusterRole in config/metrics/crd-clusterrole.yaml for the aggregated clusterrole for kube-state-metrics
• adds a kustomization.yaml to config/metrics which includes the above two
• Changes to the kustomization of kube-state-metrics:
• Adds a patch to add a sidecar container to kube-state-metrics which
  • periodicly lists configmaps in namespace observability which have the label kube-state-metrics/custom-resource set
  • combines the yamls of the configmaps to a single configuration file for kube-state-metrics
  • updates the config file for kube-state-metrics so it reloads the configuration automatically
• Adds a aggregated clusterrole + clusterrole binding so providers can dynamically add additional rbac rules to allow kube-state-metrics to watch the relevant resources
• Changes to tilt up:
• Adds a configuration option deploy_kustomizations which allows to define paths to additional kustomizations which then get deployed to the cluster
  • Example usage: to reference a kustomization which adds a configuration + clusterrole for additional kube-state-metrics crd configuration.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

/area observability

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[chrischdi]

/area devtools

[sbueringer]

Nice one, just a few smaller findings

[sbueringer]

Thank you!

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 58ea5fcdb7a72dee5dea369e481b5f73c35fe33d

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sbueringer

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