Kubernetes Selector Concepts

External

• https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.14/#labelselector-v1-meta
• https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
• https://kubernetes.io/docs/concepts/overview/working-with-objects/field-selectors/

Internal

• Kubernetes Concepts

Example

...
selector:
  matchLabels:
    color: blue
...

Query by Selector

Get the namespace of the first pod from a series that has an "app=my-app" label.

kubectl get -A pods --selector=app=my-app -o jsonpath='{.items[0].metadata.namespace}'