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Do not count soft-deleted pods for scaling purposes in HPA controller

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This commit is contained in:
moonek 2018-08-28 16:27:47 +00:00
parent b2b3c36ecb
commit 3fedbe48e3
3 changed files with 115 additions and 20 deletions
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79
pkg/controller/podautoscaler/horizontal_test.go
View File

@ -97,22 +97,23 @@ type testCase struct {
initialReplicas int32
// CPU target utilization as a percentage of the requested resources.
CPUTarget int32
CPUCurrent int32
verifyCPUCurrent bool
reportedLevels []uint64
reportedCPURequests []resource.Quantity
reportedPodReadiness []v1.ConditionStatus
reportedPodStartTime []metav1.Time
reportedPodPhase []v1.PodPhase
scaleUpdated bool
statusUpdated bool
eventCreated bool
verifyEvents bool
useMetricsAPI bool
metricsTarget []autoscalingv2.MetricSpec
expectedDesiredReplicas int32
expectedConditions []autoscalingv1.HorizontalPodAutoscalerCondition
CPUTarget int32
CPUCurrent int32
verifyCPUCurrent bool
reportedLevels []uint64
reportedCPURequests []resource.Quantity
reportedPodReadiness []v1.ConditionStatus
reportedPodStartTime []metav1.Time
reportedPodPhase []v1.PodPhase
reportedPodDeletionTimestamp []bool
scaleUpdated bool
statusUpdated bool
eventCreated bool
verifyEvents bool
useMetricsAPI bool
metricsTarget []autoscalingv2.MetricSpec
expectedDesiredReplicas int32
expectedConditions []autoscalingv1.HorizontalPodAutoscalerCondition
// Channel with names of HPA objects which we have reconciled.
processed chan string
@ -272,6 +273,11 @@ func (tc *testCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfa
podPhase = tc.reportedPodPhase[i]
}
podDeletionTimestamp := false
if tc.reportedPodDeletionTimestamp != nil {
podDeletionTimestamp = tc.reportedPodDeletionTimestamp[i]
}
podName := fmt.Sprintf("%s-%d", podNamePrefix, i)
reportedCPURequest := resource.MustParse("1.0")
@ -310,6 +316,9 @@ func (tc *testCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfa
},
},
}
if podDeletionTimestamp {
pod.DeletionTimestamp = &metav1.Time{Time: time.Now()}
}
obj.Items = append(obj.Items, pod)
}
return true, obj, nil
@ -806,6 +815,25 @@ func TestScaleUpIgnoresFailedPods(t *testing.T) {
tc.runTest(t)
}
func TestScaleUpIgnoresDeletionPods(t *testing.T) {
tc := testCase{
minReplicas: 2,
maxReplicas: 6,
initialReplicas: 2,
expectedDesiredReplicas: 4,
CPUTarget: 30,
CPUCurrent: 60,
verifyCPUCurrent: true,
reportedLevels: []uint64{500, 700},
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
reportedPodPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning},
reportedPodDeletionTimestamp: []bool{false, false, true, true},
useMetricsAPI: true,
}
tc.runTest(t)
}
func TestScaleUpDeployment(t *testing.T) {
tc := testCase{
minReplicas: 2,
@ -1183,6 +1211,25 @@ func TestScaleDownIgnoresFailedPods(t *testing.T) {
tc.runTest(t)
}
func TestScaleDownIgnoresDeletionPods(t *testing.T) {
tc := testCase{
minReplicas: 2,
maxReplicas: 6,
initialReplicas: 5,
expectedDesiredReplicas: 3,
CPUTarget: 50,
CPUCurrent: 28,
verifyCPUCurrent: true,
reportedLevels: []uint64{100, 300, 500, 250, 250},
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
useMetricsAPI: true,
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
reportedPodPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning},
reportedPodDeletionTimestamp: []bool{false, false, false, false, false, true, true},
}
tc.runTest(t)
}
func TestTolerance(t *testing.T) {
tc := testCase{
minReplicas: 1,

2
pkg/controller/podautoscaler/replica_calculator.go
View File

@ -349,7 +349,7 @@ func groupPods(pods []v1.Pod, metrics metricsclient.PodMetricsInfo, resource v1.
ignoredPods = sets.NewString()
glog.Errorf("groupPods stack: %v", string(debug.Stack()))
for _, pod := range pods {
if pod.Status.Phase == v1.PodFailed {
if pod.DeletionTimestamp != nil || pod.Status.Phase == v1.PodFailed {
continue
}
if _, found := metrics[pod.Name]; !found {

54
pkg/controller/podautoscaler/replica_calculator_test.go
View File

@ -89,9 +89,10 @@ type replicaCalcTestCase struct {
resource *resourceInfo
metric *metricInfo
podReadiness []v1.ConditionStatus
podStartTime []metav1.Time
podPhase []v1.PodPhase
podReadiness []v1.ConditionStatus
podStartTime []metav1.Time
podPhase []v1.PodPhase
podDeletionTimestamp []bool
}
const (
@ -122,6 +123,10 @@ func (tc *replicaCalcTestCase) prepareTestClientSet() *fake.Clientset {
if tc.podPhase != nil {
podPhase = tc.podPhase[i]
}
podDeletionTimestamp := false
if tc.podDeletionTimestamp != nil {
podDeletionTimestamp = tc.podDeletionTimestamp[i]
}
podName := fmt.Sprintf("%s-%d", podNamePrefix, i)
pod := v1.Pod{
Status: v1.PodStatus{
@ -145,6 +150,9 @@ func (tc *replicaCalcTestCase) prepareTestClientSet() *fake.Clientset {
Containers: []v1.Container{{}, {}},
},
}
if podDeletionTimestamp {
pod.DeletionTimestamp = &metav1.Time{Time: time.Now()}
}
if tc.resource != nil && i < len(tc.resource.requests) {
pod.Spec.Containers[0].Resources = v1.ResourceRequirements{
@ -517,6 +525,26 @@ func TestReplicaCalcScaleUpIgnoresFailedPods(t *testing.T) {
tc.runTest(t)
}
func TestReplicaCalcScaleUpIgnoresDeletionPods(t *testing.T) {
tc := replicaCalcTestCase{
currentReplicas: 2,
expectedReplicas: 4,
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
podPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning},
podDeletionTimestamp: []bool{false, false, true, true},
resource: &resourceInfo{
name: v1.ResourceCPU,
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
levels: []int64{500, 700},
targetUtilization: 30,
expectedUtilization: 60,
expectedValue: numContainersPerPod * 600,
},
}
tc.runTest(t)
}
func TestReplicaCalcScaleUpCM(t *testing.T) {
tc := replicaCalcTestCase{
currentReplicas: 3,
@ -807,6 +835,26 @@ func TestReplicaCalcScaleDownIgnoresFailedPods(t *testing.T) {
tc.runTest(t)
}
func TestReplicaCalcScaleDownIgnoresDeletionPods(t *testing.T) {
tc := replicaCalcTestCase{
currentReplicas: 5,
expectedReplicas: 3,
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
podPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning},
podDeletionTimestamp: []bool{false, false, false, false, false, true, true},
resource: &resourceInfo{
name: v1.ResourceCPU,
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
levels: []int64{100, 300, 500, 250, 250},
targetUtilization: 50,
expectedUtilization: 28,
expectedValue: numContainersPerPod * 280,
},
}
tc.runTest(t)
}
func TestReplicaCalcTolerance(t *testing.T) {
tc := replicaCalcTestCase{
currentReplicas: 3,