# 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="/files/-Mg0O3N9a7557P3j6Jdy" %}

```
$ 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 %}


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