Labels

• Labels are key value pairs attached to pods, deployments, services

• For users to identify attributes of object

• Unique per object

Labels with Selectors

Labels with selectors let you identify specific set of objects

• Equality based selector: labels equal/unequal

• Set based selector: labels in/not in/exists

• Used with kubectl

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helloworld-pod-with-labels.yml

$ kubectl create -f helloworld-pod-with-labels.yml

$ kubectl get pods

$ kubectl get pods - -show-labels

Assigning labels to running Pods

$ kubectl label po/helloworld app=myApp - -overwrite

Overwrites the app name

$ kubectl label po/helloworld author=chandrikadeb7 --overwrite

Overwrites author name

$ kubectl label po/helloworld author- 

Deletes the label author