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Add comments about wildcard clusterEvent

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Signed-off-by: kerthcet <kerthcet@gmail.com>
This commit is contained in:
kerthcet 2024-02-05 11:46:59 +08:00
parent d81023db30
commit f97dec2840
1 changed files with 13 additions and 1 deletions
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14
pkg/scheduler/framework/types.go
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@ -83,7 +83,15 @@ const (
CSINode GVK = "storage.k8s.io/CSINode"
CSIDriver GVK = "storage.k8s.io/CSIDriver"
CSIStorageCapacity GVK = "storage.k8s.io/CSIStorageCapacity"
WildCard GVK = "*"
// WildCard is a special GVK to match all resources.
// e.g., If you register `{Resource: "*", ActionType: All}` in EventsToRegister,
// all coming clusterEvents will be admitted. Be careful to register it, it will
// increase the computing pressure in requeueing unless you really need it.
//
// Meanwhile, if the coming clusterEvent is a wildcard one, all pods
// will be moved from unschedulablePod pool to activeQ/backoffQ forcibly.
WildCard GVK = "*"
)
type ClusterEventWithHint struct {
@ -147,6 +155,10 @@ func (ce ClusterEvent) IsWildCard() bool {
// Match returns true if ClusterEvent is matched with the coming event.
// If the ce.Resource is "*", there's no requirement for the coming event' Resource.
// Contrarily, if the coming event's Resource is "*", the ce.Resource should only be "*".
//
// Note: we have a special case here when the coming event is a wildcard event,
// it will force all Pods to move to activeQ/backoffQ,
// but we take it as an unmatched event unless the ce is also a wildcard one.
func (ce ClusterEvent) Match(event ClusterEvent) bool {
return ce.IsWildCard() || (ce.Resource == WildCard || ce.Resource == event.Resource) && ce.ActionType&event.ActionType != 0
}