<p>I'm very beginner with K8S and I've a question about the labels with kubernetes. On youtube video (<a href="https://www.youtube.com/watch?v=JIaY9AXq_zM&amp;list=PLn6POgpklwWqfzaosSgX2XEKpse5VY2v5&amp;index=16" rel="noreferrer">In french here)</a>, I've seen that :</p>
<p>The man create three deploys with these commands and run the command <code>kubectl get deployment</code> then <code>kubectl get deployment --show-labels</code> :</p>
<pre><code>kubectl run monnginx --image nginx --labels &quot;env=prod,group=front&quot;
kubectl run monnginx2 --image nginx --labels &quot;env=dev,group=front&quot;
kubectl run monnginx3 --image nginx --labels &quot;env=prod,group=back&quot;
</code></pre>
<pre><code>root@kubmaster:# kubectl get deployments
NAME            READY        UP-TO-DATE AVAILABLE      AGE
monnginx         1/1             1          1          46s
monnginx2        1/1             1          1          22s
monnginx3        1/1             1          1          10s
      
</code></pre>
<pre><code>root@kubmaster:# kubectl get deployments --show-labels
NAME            READY        UP-TO-DATE AVAILABLE      AGE   LABELS
monnginx         1/1             1          1          46s   env=prod,group=front
monnginx2        1/1             1          1          22s   env=dev,group=front 
monnginx3        1/1             1          1          10s   env=prod,group=back
      
</code></pre>
<p>Currently, if I try to do the same things :</p>
<pre><code>root@kubermaster:~ kubectl run mynginx --image nginx --labels &quot;env=prod,group=front&quot;
pod/mynginx created

root@kubermaster:~ kubectl run mynginx2 --image nginx --labels &quot;env=dev,group=front&quot;
pod/mynginx2 created

root@kubermaster:~ kubectl run mynginx3 --image nginx --labels &quot;env=dev,group=back&quot;
pod/mynginx3 created

</code></pre>
<p>When I try the command <code>kubectl get deployments --show-labels</code>, the output is :</p>
<pre><code>No resources found in default namespace.
</code></pre>
<p>But if I try <code>kubectl get pods --show-labels</code>, the output is :</p>
<pre><code>NAME       READY   STATUS    RESTARTS   AGE     LABELS
mynginx    1/1     Running   0          2m39s   env=prod,group=front
mynginx2   1/1     Running   0          2m32s   env=dev,group=front
mynginx3   1/1     Running   0          2m25s   env=dev,group=back
</code></pre>
<p>If I follow every steps from the videos, there is a way to put some labels on deployments... But the command <code>kubectl create deployment</code> does not accept the flag --labels :</p>
<pre><code>Error: unknown flag: --labels
</code></pre>
<p>There is someone to explain why I've this error and How put some label ?</p>
<p>Thanks a lot !</p>

<p>Because <code>$ kubectl create deployment</code> doesn't support <code>--labels</code> flag. But you can use <code>$ kubectl label</code> to add labels to your deployment.</p>
<p>Examples:</p>
<pre><code># Update deployment 'my-deployment' with the label 'unhealthy' and the value 'true'.
$ kubectl label deployment my-deployment unhealthy=true
  
# Update deployment 'my-deployment' with the label 'status' and the value 'unhealthy', overwriting any existing value.
$ kubectl label --overwrite deployment my-deployment status=unhealthy
</code></pre>
<p><strong>It works with other Kubernetes objects too.</strong></p>
<p>Format:  <code> kubectl label [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N</code></p>
