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register Node/UpdateNodeTaint event to plugins which has Node/Add only, doesn't have Node/UpdateNodeTaint

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This commit is contained in:
Kensei Nakada
2023-12-13 06:15:07 +00:00
parent 8f80e01467
commit 2b56de43e5
13 changed files with 271 additions and 96 deletions
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11
pkg/scheduler/framework/plugins/interpodaffinity/plugin.go
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@@ -64,8 +64,17 @@ func (pl *InterPodAffinity) EventsToRegister() []framework.ClusterEventWithHint
// an unschedulable Pod schedulable.
// - Add. An unschedulable Pod may fail due to violating pod-affinity constraints,
// adding an assigned Pod may make it schedulable.
//
// A note about UpdateNodeTaint event:
// NodeAdd QueueingHint isn't always called because of the internal feature called preCheck.
// As a common problematic scenario,
// when a node is added but not ready, NodeAdd event is filtered out by preCheck and doesn't arrive.
// In such cases, this plugin may miss some events that actually make pods schedulable.
// As a workaround, we add UpdateNodeTaint event to catch the case.
// We can remove UpdateNodeTaint when we remove the preCheck feature.
// See: https://github.com/kubernetes/kubernetes/issues/110175
{Event: framework.ClusterEvent{Resource: framework.Pod, ActionType: framework.All}},
{Event: framework.ClusterEvent{Resource: framework.Node, ActionType: framework.Add | framework.UpdateNodeLabel}},
{Event: framework.ClusterEvent{Resource: framework.Node, ActionType: framework.Add | framework.UpdateNodeLabel | framework.UpdateNodeTaint}},
}
}