When a pod can't be scheduled, what does the 3 in "Insufficient cpu (3)" refer to? : <p>When I create a Pod that cannot be scheduled because there are no nodes with sufficient CPU to meet the Pod's CPU request, the events output from <code>kubectl describe pod/...</code> contain a message like <code>No nodes are available that match all of the following predicates:: Insufficient cpu (3)</code>.</p>

<p>What does the <code>(3)</code> in <code>Insufficient cpu (3)</code> mean?</p>

<p>For example, if I try to create a pod that requests 24 CPU when all of my nodes only have 4 CPUs:</p>

<pre><code>$ kubectl describe pod/large-cpu-request
Name:           large-cpu-request
Namespace:      default
Node:           /
Labels:         &lt;none&gt;
Annotations:    &lt;none&gt;
Status:         Pending
IP:
Controllers:    &lt;none&gt;
Containers:
  cpuhog:
    ...
    Requests:
      cpu:              24
...
Events:
  FirstSeen     LastSeen        Count   From                    SubObjectPath   Type            Reason                  Message
  ---------     --------        -----   ----                    -------------   --------        ------                  -------
  23m           30s             84      default-scheduler                       Warning         FailedScheduling        No nodes are available that match all of the following predicates:: Insufficient cpu (3).
</code></pre>

<p>At other times I have seen event messages like <code>No nodes are available that match all of the following predicates:: Insufficient cpu (2), PodToleratesNodeTaints (1)</code> when a pod's resource requests were too high, so the 3 does not seem like a constant number - nor does it seem related to my 24 CPU request either.</p>
