Labels guide

[corvus-ch]

As an author of Commodore components, operators and others, one easily can get lost when it comes to naming labels and annotations. Having a guide would be of help. It can:

• speed up the decision process for defining label names.
• prevent collisions and thus unintended side effects.

None conclusive list to be covered in that guide:

• labels to be used on different Kubernetes objects (e.g. Deployments, Services, etc.)
• labels to be used for matchSelectors (e.g. to make Prometheus picking up service monitors or alert rules).

See also https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/.