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Added unschedulabe predicate.

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Signed-off-by: Da K. Ma <madaxa@cn.ibm.com>
This commit is contained in:
Da K. Ma 2018-02-25 14:00:59 +08:00
parent af58729c86
commit dac59e4dd1
2 changed files with 18 additions and 4 deletions
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17
pkg/scheduler/algorithm/predicates/predicates.go
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@ -68,6 +68,8 @@ const (
NoDiskConflictPred = "NoDiskConflict"
// PodToleratesNodeTaintsPred defines the name of predicate PodToleratesNodeTaints.
PodToleratesNodeTaintsPred = "PodToleratesNodeTaints"
// CheckNodeUnschedulablePred defines the name of predicate CheckNodeUnschedulablePredicate.
CheckNodeUnschedulablePred = "CheckNodeUnschedulable"
// PodToleratesNodeNoExecuteTaintsPred defines the name of predicate PodToleratesNodeNoExecuteTaints.
PodToleratesNodeNoExecuteTaintsPred = "PodToleratesNodeNoExecuteTaints"
// CheckNodeLabelPresencePred defines the name of predicate CheckNodeLabelPresence.
@ -124,7 +126,7 @@ const (
// The order is based on the restrictiveness & complexity of predicates.
// Design doc: https://github.com/kubernetes/community/blob/master/contributors/design-proposals/scheduling/predicates-ordering.md
var (
predicatesOrdering = []string{CheckNodeConditionPred,
predicatesOrdering = []string{CheckNodeConditionPred, CheckNodeUnschedulablePred,
GeneralPred, HostNamePred, PodFitsHostPortsPred,
MatchNodeSelectorPred, PodFitsResourcesPred, NoDiskConflictPred,
PodToleratesNodeTaintsPred, PodToleratesNodeNoExecuteTaintsPred, CheckNodeLabelPresencePred,
@ -1432,8 +1434,8 @@ func (c *PodAffinityChecker) satisfiesPodsAffinityAntiAffinity(pod *v1.Pod, node
return nil, nil
}
// PodToleratesNodeTaints checks if a pod tolerations can tolerate the node taints
func PodToleratesNodeTaints(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
// CheckNodeUnschedulablePredicate checks if a pod can be scheduled on a node with Unschedulable spec.
func CheckNodeUnschedulablePredicate(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
if nodeInfo == nil || nodeInfo.Node() == nil {
return false, []algorithm.PredicateFailureReason{ErrNodeUnknownCondition}, nil
}
@ -1442,6 +1444,15 @@ func PodToleratesNodeTaints(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeI
return false, []algorithm.PredicateFailureReason{ErrNodeUnschedulable}, nil
}
return true, nil, nil
}
// PodToleratesNodeTaints checks if a pod tolerations can tolerate the node taints
func PodToleratesNodeTaints(pod *v1.Pod, meta algorithm.PredicateMetadata, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
if nodeInfo == nil || nodeInfo.Node() == nil {
return false, []algorithm.PredicateFailureReason{ErrNodeUnknownCondition}, nil
}
return podToleratesNodeTaints(pod, nodeInfo, func(t *v1.Taint) bool {
// PodToleratesNodeTaints is only interested in NoSchedule and NoExecute taints.
return t.Effect == v1.TaintEffectNoSchedule || t.Effect == v1.TaintEffectNoExecute

5
pkg/scheduler/algorithmprovider/defaults/defaults.go
View File

@ -186,12 +186,15 @@ func ApplyFeatureGates() {
// if you just want remove specific provider, call func RemovePredicateKeyFromAlgoProvider()
factory.RemovePredicateKeyFromAlgorithmProviderMap(predicates.CheckNodeConditionPred)
// Fit is determined based on whether a node has Unschedulable spec
factory.RegisterMandatoryFitPredicate(predicates.CheckNodeUnschedulablePred, predicates.CheckNodeUnschedulablePredicate)
// Fit is determined based on whether a pod can tolerate all of the node's taints
factory.RegisterMandatoryFitPredicate(predicates.PodToleratesNodeTaintsPred, predicates.PodToleratesNodeTaints)
// Insert Key "PodToleratesNodeTaints" To All Algorithm Provider
// Insert Key "PodToleratesNodeTaints" and "CheckNodeUnschedulable" To All Algorithm Provider
// The key will insert to all providers which in algorithmProviderMap[]
// if you just want insert to specific provider, call func InsertPredicateKeyToAlgoProvider()
factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.PodToleratesNodeTaintsPred)
factory.InsertPredicateKeyToAlgorithmProviderMap(predicates.CheckNodeUnschedulablePred)
glog.Warningf("TaintNodesByCondition is enabled, PodToleratesNodeTaints predicate is mandatory")
}