Support addtional filter for extended resource pod

[fishingfly]

Hi

In our k8s cluster, we just want to evict gpu pods before node reboot, and there is no fixed label on these gpu pods, so kured cannot select these pods through the label selector by using the existing flag drain-pod-selector.

Can kured support addtional filter for extended resource pod?

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[evrardjp]

Here is the code tackling the draining of the nodes:

kured/cmd/kured/main.go

Lines 515 to 526 in 969926d

	drainer := &kubectldrain.Helper{
	Client: client,
	Ctx: context.Background(),
	GracePeriodSeconds: drainGracePeriod,
	PodSelector: drainPodSelector,
	SkipWaitForDeleteTimeoutSeconds: skipWaitForDeleteTimeoutSeconds,
	Force: true,
	DeleteEmptyDirData: true,
	IgnoreAllDaemonSets: true,
	ErrOut: os.Stderr,
	Out: os.Stdout,
	Timeout: drainTimeout,

.

All pods matching those parameters will be evicted. I am not sure I understood the problem.