Propose not to delete all pods after the job finished

[hzxuzhonghu]

After I run a batch.volcano.sh/Job, i want to look at the logs of the task. But i find the pods are all deleted.
I think it is common use case to check the logs., so i would keep all the job related resources. until user explicitly want to delete.

[k82cn]

/cc @TommyLike

[SrinivasChilveri]

I think any how user need not required to delete each pod explicitly ,as he deletes volcano job automatically the pods will be deleted ,so I think its always better to give more flexibility to user, to delete his own created jobs & related resources like pods,pvcs,services etc. even if we see currently we are delete-ting the service, pvc etc during the batch.volcano.sh/Job deletion by using the OwnerReferences as shown below.

Its better to follow the same for pods instead of explicit deleting on completed

In createJobIOIfNotExist func
pvc := &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Namespace: job.Namespace,
Name: outputPVC,
OwnerReferences: []metav1.OwnerReference{
*metav1.NewControllerRef(job, helpers.JobKind),
},
},
Spec: *job.Spec.Output.VolumeClaim,
}

[k82cn]

/sig apps