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Adhere to K8s & Helm label best practices #8

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emerconnelly opened this issue Oct 5, 2023 · 1 comment
Open

Adhere to K8s & Helm label best practices #8

emerconnelly opened this issue Oct 5, 2023 · 1 comment

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@emerconnelly
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emerconnelly commented Oct 5, 2023 •
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Both Kubernetes & Helm have released official label best practices.

These labels are consumed by K8s tooling, such as Lens.

The label translations I've identified are:

  • app: > app.kubernetes.io/name:
  • chart: > helm.sh/chart:
  • release: > app.kubernetes.io/instance:
  • heritage: > app.kubernetes.io/managed-by:
@emerconnelly
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emerconnelly commented Oct 5, 2023 •
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In K8s, with kind StatefulSet the spec.selector.matchLabels is immutable post-creation. Upgrading a pre-existing Helm releases will fail on this error:

Error: UPGRADE FAILED: cannot patch "<release-name>" with kind StatefulSet: StatefulSet.apps "<release-name>" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'template', 'updateStrategy', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden

I have not identified a simple workaround for this.

@emerconnelly emerconnelly mentioned this issue Oct 5, 2023
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@emerconnelly emerconnelly changed the title Update labels to follow the Kubernetes & Helm best practice Update labels to follow Oct 5, 2023
@emerconnelly emerconnelly changed the title Update labels to follow Adhere to K8s & Helm label best practices Oct 5, 2023
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@emerconnelly