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Skip default spreading scoring plugin for pods that define TopologySpreadConstraints

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This commit is contained in:
skilxn-go 2020-01-27 20:42:12 +08:00
parent d1dd6cb0ef
commit a4d1624fec
2 changed files with 39 additions and 0 deletions
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13
pkg/scheduler/framework/plugins/defaultpodtopologyspread/default_pod_topology_spread.go
View File

@ -67,10 +67,19 @@ func (s *postFilterState) Clone() framework.StateData {
return s
}
// skipDefaultPodTopologySpread returns true if the pod's TopologySpreadConstraints are specified.
func skipDefaultPodTopologySpread(pod *v1.Pod) bool {
return len(pod.Spec.TopologySpreadConstraints) != 0
}
// Score invoked at the Score extension point.
// The "score" returned in this function is the matching number of pods on the `nodeName`,
// it is normalized later.
func (pl *DefaultPodTopologySpread) Score(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (int64, *framework.Status) {
if skipDefaultPodTopologySpread(pod) {
return 0, nil
}
c, err := state.Read(postFilterStateKey)
if err != nil {
return 0, framework.NewStatus(framework.Error, fmt.Sprintf("Error reading %q from cycleState: %v", postFilterStateKey, err))
@ -96,6 +105,10 @@ func (pl *DefaultPodTopologySpread) Score(ctx context.Context, state *framework.
// where zone information is included on the nodes, it favors nodes
// in zones with fewer existing matching pods.
func (pl *DefaultPodTopologySpread) NormalizeScore(ctx context.Context, state *framework.CycleState, pod *v1.Pod, scores framework.NodeScoreList) *framework.Status {
if skipDefaultPodTopologySpread(pod) {
return nil
}
countsByZone := make(map[string]int64, 10)
maxCountByZone := int64(0)
maxCountByNodeName := int64(0)

26
pkg/scheduler/framework/plugins/defaultpodtopologyspread/default_pod_topology_spread_test.go
View File

@ -338,6 +338,32 @@ func TestDefaultPodTopologySpreadScore(t *testing.T) {
expectedList: []framework.NodeScore{{Name: "machine1", Score: 0}, {Name: "machine2", Score: 50}},
name: "Another stateful set with partial pod label matches",
},
{
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Labels: labels1,
OwnerReferences: controllerRef("StatefulSet", "name", "abc123"),
},
Spec: v1.PodSpec{
TopologySpreadConstraints: []v1.TopologySpreadConstraint{
{
MaxSkew: 1,
TopologyKey: "foo",
WhenUnsatisfiable: v1.DoNotSchedule,
},
},
},
},
pods: []*v1.Pod{
{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels2, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
{Spec: zone1Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
{Spec: zone2Spec, ObjectMeta: metav1.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("StatefulSet", "name", "abc123")}},
},
nodes: []string{"machine1", "machine2"},
sss: []*apps.StatefulSet{{Spec: apps.StatefulSetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"baz": "blah"}}}}},
expectedList: []framework.NodeScore{{Name: "machine1", Score: 0}, {Name: "machine2", Score: 0}},
name: "Another stateful set with TopologySpreadConstraints set in pod",
},
}
for _, test := range tests {