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How the OR expression can be used with selectors and labels?
selector:
app: myapp
tier: frontend
The above matches pods where labels app==myapp AND tier=frontend.
But the OR expression can be used?
app==myapp OR tier=frontend?
629
You can also do a kubectl get pod example-pod -o yaml to see all of the fields and labels. Let us now add another label to the above pod using the kubectl command. kubectl label --overwrite pods example-pod env=prod will update the value of key env in the labels, and if the label does not exist, it will create one.
Now you can do that :
kubectl get pods -l 'environment in (production, qa)' https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#list-and-watch-filtering
94
OR isn't supported in your case.
You can try the set-based label selector. Refer to the following link, https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#resources-that-support-set-based-requirements
41
Allowed keywords are =, ==, !=, in, notin, exists(only the key identifier).
== and = are synonyms.
in can be used for OR operation.
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