labels.md

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

{% file src="../.gitbook/assets/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

{% hint style="info" %} Overwrites the app name {% endhint %}

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

{% hint style="info" %} Overwrites author name {% endhint %}

$ kubectl label po/helloworld author- 

{% hint style="info" %} Deletes the label author {% endhint %}