Kubernetes Selector Concepts: Difference between revisions

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=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=
=Internal=


Line 4: Line 10:


=Example=
=Example=
 
<font size=-1>
  ...
  ...
  selector:
  selector:
   matchLabels:
   matchLabels:
     color: blue
     color: blue
...
</font>
=Query by Selector=
Get the namespace of the first pod from a series that has an "app=my-app" label.
<syntaxhighlight lang='bash'>
kubectl get -A pods --selector=app=my-app -o jsonpath='{.items[0].metadata.namespace}'
</syntaxhighlight>

Latest revision as of 00:40, 6 February 2022

External

Internal

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}'