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Do not schedule pod to the node under PID pressure.

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Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com>
This commit is contained in:
Da K. Ma
2018-03-19 18:25:12 +08:00
parent 3dbcd1ddce
commit 2c10d15ae5
13 changed files with 185 additions and 13 deletions
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14
pkg/scheduler/algorithm/predicates/predicates.go
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@@ -88,6 +88,8 @@ const (
CheckNodeMemoryPressurePred = "CheckNodeMemoryPressure"
// CheckNodeDiskPressurePred defines the name of predicate CheckNodeDiskPressure.
CheckNodeDiskPressurePred = "CheckNodeDiskPressure"
// CheckNodePIDPressurePred defines the name of predicate CheckNodePIDPressure.
CheckNodePIDPressurePred = "CheckNodePIDPressure"
// DefaultMaxEBSVolumes is the limit for volumes attached to an instance.
// Amazon recommends no more than 40; the system root volume uses at least one.
@@ -132,7 +134,7 @@ var (
PodToleratesNodeTaintsPred, PodToleratesNodeNoExecuteTaintsPred, CheckNodeLabelPresencePred,
CheckServiceAffinityPred, MaxEBSVolumeCountPred, MaxGCEPDVolumeCountPred,
MaxAzureDiskVolumeCountPred, CheckVolumeBindingPred, NoVolumeZoneConflictPred,
CheckNodeMemoryPressurePred, CheckNodeDiskPressurePred, MatchInterPodAffinityPred}
CheckNodeMemoryPressurePred, CheckNodePIDPressurePred, CheckNodeDiskPressurePred, MatchInterPodAffinityPred}
)
// NodeInfo interface represents anything that can get node object from node ID.
@@ -1591,6 +1593,16 @@ func CheckNodeDiskPressurePredicate(pod *v1.Pod, meta algorithm.PredicateMetadat
return true, nil, nil
}
// CheckNodePIDPressurePredicate checks if a pod can be scheduled on a node
// reporting pid pressure condition.
func CheckNodePIDPressurePredicate(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
// check if node is under pid pressure
if nodeInfo.PIDPressureCondition() == v1.ConditionTrue {
return false, []algorithm.PredicateFailureReason{ErrNodeUnderPIDPressure}, nil
}
return true, nil, nil
}
// CheckNodeConditionPredicate checks if a pod can be scheduled on a node reporting out of disk,
// network unavailable and not ready condition. Only node conditions are accounted in this predicate.
func CheckNodeConditionPredicate(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {