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Enable PodTolerateNodeTaints predicate in DaemonSet controller

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This commit is contained in:
Janet Kuo
2017-02-08 17:33:59 -08:00
parent 95badd95ce
commit b593427105
3 changed files with 102 additions and 7 deletions
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42
pkg/controller/daemon/daemoncontroller.go
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@@ -45,6 +45,7 @@ import (
extensionslisters "k8s.io/kubernetes/pkg/client/listers/extensions/v1beta1"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/util/metrics"
"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm/predicates"
"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
@@ -779,13 +780,14 @@ func (dsc *DaemonSetsController) nodeShouldRunDaemonPod(node *v1.Node, ds *exten
nodeInfo := schedulercache.NewNodeInfo(pods...)
nodeInfo.SetNode(node)
_, reasons, err := predicates.GeneralPredicates(newPod, nil, nodeInfo)
_, reasons, err := daemonSetPredicates(newPod, nodeInfo)
if err != nil {
glog.Warningf("GeneralPredicates failed on ds '%s/%s' due to unexpected error: %v", ds.ObjectMeta.Namespace, ds.ObjectMeta.Name, err)
glog.Warningf("daemonSetPredicates failed on ds '%s/%s' due to unexpected error: %v", ds.ObjectMeta.Namespace, ds.ObjectMeta.Name, err)
return false, false, false, err
}
for _, r := range reasons {
glog.V(4).Infof("GeneralPredicates failed on ds '%s/%s' for reason: %v", ds.ObjectMeta.Namespace, ds.ObjectMeta.Name, r.GetReason())
glog.V(4).Infof("daemonSetPredicates failed on ds '%s/%s' for reason: %v", ds.ObjectMeta.Namespace, ds.ObjectMeta.Name, r.GetReason())
switch reason := r.(type) {
case *predicates.InsufficientResourceError:
dsc.eventRecorder.Eventf(ds, v1.EventTypeNormal, FailedPlacementReason, "failed to place pod on %q: %s", node.ObjectMeta.Name, reason.Error())
@@ -801,7 +803,9 @@ func (dsc *DaemonSetsController) nodeShouldRunDaemonPod(node *v1.Node, ds *exten
predicates.ErrNodeLabelPresenceViolated,
// this one is probably intentional since it's a workaround for not having
// pod hard anti affinity.
predicates.ErrPodNotFitsHostPorts:
predicates.ErrPodNotFitsHostPorts,
// DaemonSet is expected to respect taints and tolerations
predicates.ErrTaintsTolerationsNotMatch:
wantToRun, shouldSchedule, shouldContinueRunning = false, false, false
// unintentional
case
@@ -818,9 +822,9 @@ func (dsc *DaemonSetsController) nodeShouldRunDaemonPod(node *v1.Node, ds *exten
// unexpected
case
predicates.ErrPodAffinityNotMatch,
predicates.ErrServiceAffinityViolated,
predicates.ErrTaintsTolerationsNotMatch:
return false, false, false, fmt.Errorf("unexpected reason: GeneralPredicates should not return reason %s", reason.GetReason())
predicates.ErrServiceAffinityViolated:
glog.Warningf("unexpected predicate failure reason: %s", reason.GetReason())
return false, false, false, fmt.Errorf("unexpected reason: daemonSetPredicates should not return reason %s", reason.GetReason())
default:
glog.V(4).Infof("unknown predicate failure reason: %s", reason.GetReason())
wantToRun, shouldSchedule, shouldContinueRunning = false, false, false
@@ -834,6 +838,30 @@ func (dsc *DaemonSetsController) nodeShouldRunDaemonPod(node *v1.Node, ds *exten
return
}
// daemonSetPredicates checks if a DaemonSet's pod can be scheduled on a node using GeneralPredicates
// and PodToleratesNodeTaints predicate
func daemonSetPredicates(pod *v1.Pod, nodeInfo *schedulercache.NodeInfo) (bool, []algorithm.PredicateFailureReason, error) {
var predicateFails []algorithm.PredicateFailureReason
fit, reasons, err := predicates.GeneralPredicates(pod, nil, nodeInfo)
if err != nil {
return false, predicateFails, err
}
if !fit {
predicateFails = append(predicateFails, reasons...)
}
fit, reasons, err = predicates.PodToleratesNodeTaints(pod, nil, nodeInfo)
if err != nil {
return false, predicateFails, err
}
if !fit {
predicateFails = append(predicateFails, reasons...)
}
return len(predicateFails) == 0, predicateFails, nil
}
// byCreationTimestamp sorts a list by creation timestamp, using their names as a tie breaker.
type byCreationTimestamp []*extensions.DaemonSet