<p>Worker nodes upgraded to latest k8s version and I am facing the 'NotReady' status of those worker nodes. I see 'PIDPressure - False' when I do a 'kubectl describe' for these nodes.</p>

<blockquote>
  <p>PIDPressure - False</p>
</blockquote>

<p>^^ is an expected condition of the healthy node, it means that kubelet has sufficient PIDs available for normal operation. </p>

<p>Need more details:</p>

<ul>
<li>Kubelet version? <code>kubectl version</code></li>
<li>Can you share a full output of the describe command? <code>kubectl describe node &lt;node-name&gt;</code></li>
<li>ssh to the node and run <code>sudo journalctl -u kubelet --all|tail</code></li>
</ul>
