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Merge pull request #91986 from denkensk/fix-pdb-preempt

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Computing DisruptedPods of PDB in scheduling preemption
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Kubernetes Prow Robot 2020-06-16 19:23:03 -07:00 committed by GitHub
commit 7e073db5e0
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2 changed files with 39 additions and 2 deletions
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7
pkg/scheduler/core/generic_scheduler.go
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@ -941,9 +941,12 @@ func filterPodsWithPDBViolation(pods []*v1.Pod, pdbs []*policy.PodDisruptionBudg
// We have found a matching PDB.
if pdbsAllowed[i] <= 0 {
pdbForPodIsViolated = true
break
} else {
pdbsAllowed[i]--
// Only decrement the matched pdb when it's not in its <DisruptedPods>;
// otherwise we may over-decrement the budget number.
if _, exist := pdb.Status.DisruptedPods[pod.Name]; !exist {
pdbsAllowed[i]--
}
}
}
}

34
pkg/scheduler/core/generic_scheduler_test.go
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@ -1470,6 +1470,40 @@ func TestSelectNodesForPreemption(t *testing.T) {
expected: map[string]victims{"machine1": {pods: sets.NewString("a", "b"), numPDBViolations: 1}},
expectedNumFilterCalled: 3,
},
{
name: "preemption with violation of the pdb with pod whose eviction was processed, the victim doesn't belong to DisruptedPods",
registerPlugins: []st.RegisterPluginFunc{
st.RegisterQueueSortPlugin(queuesort.Name, queuesort.New),
st.RegisterPluginAsExtensions(noderesources.FitName, noderesources.NewFit, "Filter", "PreFilter"),
st.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
},
nodes: []string{"machine1"},
pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "pod1", UID: types.UID("pod1")}, Spec: v1.PodSpec{Containers: veryLargeContainers, Priority: &highPriority}},
pods: []*v1.Pod{
{ObjectMeta: metav1.ObjectMeta{Name: "a", UID: types.UID("a"), Labels: map[string]string{"app": "foo"}}, Spec: v1.PodSpec{Containers: mediumContainers, Priority: &midPriority, NodeName: "machine1"}},
{ObjectMeta: metav1.ObjectMeta{Name: "b", UID: types.UID("b"), Labels: map[string]string{"app": "foo"}}, Spec: v1.PodSpec{Containers: mediumContainers, Priority: &midPriority, NodeName: "machine1"}}},
pdbs: []*policy.PodDisruptionBudget{
{Spec: policy.PodDisruptionBudgetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"app": "foo"}}}, Status: policy.PodDisruptionBudgetStatus{DisruptionsAllowed: 1, DisruptedPods: map[string]metav1.Time{"c": {Time: time.Now()}}}}},
expected: map[string]victims{"machine1": {pods: sets.NewString("a", "b"), numPDBViolations: 1}},
expectedNumFilterCalled: 3,
},
{
name: "preemption with violation of the pdb with pod whose eviction was processed, the victim belongs to DisruptedPods",
registerPlugins: []st.RegisterPluginFunc{
st.RegisterQueueSortPlugin(queuesort.Name, queuesort.New),
st.RegisterPluginAsExtensions(noderesources.FitName, noderesources.NewFit, "Filter", "PreFilter"),
st.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
},
nodes: []string{"machine1"},
pod: &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "pod1", UID: types.UID("pod1")}, Spec: v1.PodSpec{Containers: veryLargeContainers, Priority: &highPriority}},
pods: []*v1.Pod{
{ObjectMeta: metav1.ObjectMeta{Name: "a", UID: types.UID("a"), Labels: map[string]string{"app": "foo"}}, Spec: v1.PodSpec{Containers: mediumContainers, Priority: &midPriority, NodeName: "machine1"}},
{ObjectMeta: metav1.ObjectMeta{Name: "b", UID: types.UID("b"), Labels: map[string]string{"app": "foo"}}, Spec: v1.PodSpec{Containers: mediumContainers, Priority: &midPriority, NodeName: "machine1"}}},
pdbs: []*policy.PodDisruptionBudget{
{Spec: policy.PodDisruptionBudgetSpec{Selector: &metav1.LabelSelector{MatchLabels: map[string]string{"app": "foo"}}}, Status: policy.PodDisruptionBudgetStatus{DisruptionsAllowed: 1, DisruptedPods: map[string]metav1.Time{"a": {Time: time.Now()}}}}},
expected: map[string]victims{"machine1": {pods: sets.NewString("a", "b"), numPDBViolations: 0}},
expectedNumFilterCalled: 3,
},
}
labelKeys := []string{"hostname", "zone", "region"}
for _, test := range tests {