Troubleshooting Pods

Troubleshooting the status of a Pod or group of Pods

This doc is about troubleshooting plain Pods when directly managed by Kueue, in other words, Pods that are not managed by kubernetes Jobs or supported CRDs.

Is my Pod managed directly by Kueue?

Kueue adds the label with value true to Pods that it manages. If the label is not present on a Pod, it means that Kueue is not going to admit or account for the resource usage of this Pod directly.

A Pod might not have the due to one of the following reasons:

  1. The Pod integration is disabled.
  2. The Pod belongs to a namespace or has labels that don’t satisfy the requirements of the podOptions configured for the Pod integration.
  3. The Pod is owned by a Job or equivalent CRD that is managed by Kueue.
  4. The Pod doesn’t have a label and manageJobsWithoutQueueName is set to false.

Identifying the Workload for your Pod

When using Pod groups, the name of the Workload matches the value of the label

When using single Pods, you can identify its corresponding Workload by following the guide for Identifying the Workload of a Job.

Why doesn’t a Workload exist for my Pod group?

Before creating a Workload object, Kueue expects all the Pods for the group to be created. The Pods should all have the same value for the label and the number of Pods should be equal to the value of the annotation

You can run the following command to identify whether Kueue has or has not created a Workload for the Pod:

kubectl describe pod my-pod -n my-namespace

If Kueue didn’t create the Workload object, you will see an output similar to the following:

  Type     Reason              Age   From                  Message
  ----     ------              ----  ----                  -------
  Warning  ErrWorkloadCompose  14s   pod-kueue-controller  'my-pod-group' group has fewer runnable pods than expected

Once Kueue observes all the Pods for the group, you will see an output similar to the following:

  Type     Reason              Age   From                  Message
  ----     ------              ----  ----                  -------
  Normal   CreatedWorkload     14s   pod-kueue-controller  Created Workload: my-namespace/my-pod-group

Why did my Pod disappear?

When you enable preemption, Kueue might preempt Pods to accommodate higher priority jobs or reclaim quota. Preemption is implemented via DELETE calls, the standard way of terminating a Pod in Kubernetes.

When using single Pods, Kubernetes will delete Workload object along with the Pod, as there is nothing else holding ownership to it.

Kueue doesn’t typically fully delete Pods in a Pod group upon preemption. See the next question to understand the deletion mechanics for Pods in a Pod group.

Why aren’t Pods in a Pod group deleted when Failed or Succeeded?

When using Pod groups, Kueue keeps a finalizer to prevent Pods from being deleted and to be able to track the progress of the group. You should not modify finalizers manually.

Kueue will remove the finalizer from Pods when:

  • The group satisfies the termination criteria, for example, when all Pods terminate successfully.
  • For Failed Pods, when Kueue observes a replacement Pod.
  • You delete the Workload object.

Once a Pod doesn’t have any finalizers, Kubernetes will delete the Pods based on: