Bug Report: When delete pod the related "PodGroup" won't be deleted

[xiaogaozi]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind bug

What happened:

When create Pod with Volcano as scheduler, Volcano controller will create a PodGroup automatically for this pod. The OwnerReferences field of this PodGroup will set to original pod. But BlockOwnerDeletion field in OwnerReference not set, so its value will be default value (i.e. false). Reference to official K8s document, only object with BlockOwnerDeletion set to true will be deleted when in cascading deletion. So when delete original pod the related PodGroup won't be deleted.

What you expected to happen:

Delete pod will delete related PodGroup also.

How to reproduce it (as minimally and precisely as possible):

Create a Pod and set schedulerName to volcano, then delete the pod see if related PodGroup deleted also.

Anything else we need to know?:

N/A

Environment:

• Volcano Version: v0.3
• Kubernetes version (use kubectl version): v1.14.6
• Cloud provider or hardware configuration: N/A
• OS (e.g. from /etc/os-release): N/A
• Kernel (e.g. uname -a): N/A
• Install tools: N/A
• Others: N/A