Descheduling support for FlinkDeployments

[deefreak]

What would you like to be added:
Currently, the descheduler only supports Deployment objects.
For our use case, we wanted to support FlinkDeployments and for that I have done changes and it has been working fine in our environment.

Why is this needed:
This is needed so that descheduler can support FlinkDeployments and reschedules it to other clusters if flinkdeployment pods are unschedulable.

I would like to contribute for this feature.

[XiShanYongYe-Chang]

Hi @deefreak thanks for your feedback!

For our use case, we wanted to support FlinkDeployments and for that I have done changes and it has been working fine in our environment.

What are your main changes? Can you explain them briefly?

[deefreak]

Hi @XiShanYongYe-Chang two changes are required:

1. Add flinkdeployment gvk here
2. As descheduler tries to get number of unschedulable pods and decide on rescheduling,
   I added a case for FlinkDeployments here.
   As FlinkDeployments have jobManager and taskManager pods, we need to list both of them and check if any pod is unschedulable in the same way we are doing for deployment object.

[XiShanYongYe-Chang]

Thanks @deefreak for your quick response.

Would you like to share it at a community meeting?

[deefreak]

@XiShanYongYe-Chang sure.

[deefreak]

@XiShanYongYe-Chang We will have this meeting on 6th January 2025? Should I add it in the document of the community meeting?

[XiShanYongYe-Chang]

We will have this meeting on 6th January 2025?

Yes, we will

Should I add it in the document of the community meeting?

Yes, you can do it.