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Merge pull request #55172 from hongshibao/master

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Automatic merge from submit-queue (batch tested with PRs 54493, 52501, 55172, 54780, 54819). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix divide by zero issue in calculating spread priority for zones

```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2017-11-08 15:41:18 -08:00 committed by GitHub
commit 17f7183e74
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2 changed files with 21 additions and 1 deletions
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5
plugin/pkg/scheduler/algorithm/priorities/selector_spreading.go
View File

@ -171,7 +171,10 @@ func (s *SelectorSpread) CalculateSpreadPriority(pod *v1.Pod, nodeNameToInfo map
if haveZones {
zoneId := utilnode.GetZoneKey(node)
if zoneId != "" {
zoneScore := float64(schedulerapi.MaxPriority) * ((maxCountByZone - countsByZone[zoneId]) / maxCountByZone)
zoneScore := float64(schedulerapi.MaxPriority)
if maxCountByZone > 0 {
zoneScore = float64(schedulerapi.MaxPriority) * ((maxCountByZone - countsByZone[zoneId]) / maxCountByZone)
}
fScore = (fScore * (1.0 - zoneWeighting)) + (zoneWeighting * zoneScore)
}
}

17
plugin/pkg/scheduler/algorithm/priorities/selector_spreading_test.go
View File

@ -445,6 +445,23 @@ func TestZoneSelectorSpreadPriority(t *testing.T) {
},
test: "different services",
},
{
pod: buildPod("", labels1, nil),
pods: []*v1.Pod{
buildPod(nodeMachine1Zone1, labels2, nil),
buildPod(nodeMachine1Zone2, labels2, nil),
},
services: []*v1.Service{{Spec: v1.ServiceSpec{Selector: labels1}}},
expectedList: []schedulerapi.HostPriority{
{Host: nodeMachine1Zone1, Score: schedulerapi.MaxPriority},
{Host: nodeMachine1Zone2, Score: schedulerapi.MaxPriority},
{Host: nodeMachine2Zone2, Score: schedulerapi.MaxPriority},
{Host: nodeMachine1Zone3, Score: schedulerapi.MaxPriority},
{Host: nodeMachine2Zone3, Score: schedulerapi.MaxPriority},
{Host: nodeMachine3Zone3, Score: schedulerapi.MaxPriority},
},
test: "two pods, 0 matching",
},
{
pod: buildPod("", labels1, nil),
pods: []*v1.Pod{