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Introduce PostFilter extension point

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This commit is contained in:
Wei Huang
2020-06-05 13:02:45 -07:00
parent b8b4186a14
commit 69b9ba6012
5 changed files with 308 additions and 1 deletions
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12
pkg/scheduler/scheduler.go
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@@ -545,10 +545,22 @@ func (sched *Scheduler) scheduleOne(ctx context.Context) {
" No preemption is performed.")
} else {
preemptionStartTime := time.Now()
// TODO(Huang-Wei): implement the preemption logic as a PostFilter plugin.
nominatedNode, _ = sched.preempt(schedulingCycleCtx, prof, state, pod, fitError)
metrics.PreemptionAttempts.Inc()
metrics.SchedulingAlgorithmPreemptionEvaluationDuration.Observe(metrics.SinceInSeconds(preemptionStartTime))
metrics.DeprecatedSchedulingDuration.WithLabelValues(metrics.PreemptionEvaluation).Observe(metrics.SinceInSeconds(preemptionStartTime))
// Run PostFilter plugins to try to make the pod schedulable in a future scheduling cycle.
result, status := prof.RunPostFilterPlugins(ctx, state, pod, fitError.FilteredNodesStatuses)
if status.Code() == framework.Error {
klog.Errorf("Status after running PostFilter plugins for pod %v/%v: %v", pod.Namespace, pod.Name, status)
} else {
klog.V(5).Infof("Status after running PostFilter plugins for pod %v/%v: %v", pod.Namespace, pod.Name, status)
}
if status.IsSuccess() && result != nil {
nominatedNode = result.NominatedNodeName
}
}
// Pod did not fit anywhere, so it is counted as a failure. If preemption
// succeeds, the pod should get counted as a success the next time we try to