mirror of https://github.com/k3s-io/k3s
Improve HPA sample sanitization
After my previous changes HPA wasn't behaving correctly in the following situation: - Pods use a lot of CPU during initilization, become ready right after they initialize, - Scale up triggers, - When new pods become ready HPA counts their usage (even though it's not related to any work that needs doing), - Another scale up, even though existing pods can handle work, no problem.pull/8/head
Joachim Bartosik
parent
816f2a4868
commit
7d6676eab1
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@ -73,6 +73,7 @@ go_test(
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"//staging/src/k8s.io/apimachinery/pkg/labels:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/watch:go_default_library",
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"//staging/src/k8s.io/client-go/informers:go_default_library",
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"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
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@ -103,6 +103,7 @@ type testCase struct {
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reportedLevels []uint64
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reportedCPURequests []resource.Quantity
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reportedPodReadiness []v1.ConditionStatus
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reportedPodStartTime []metav1.Time
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reportedPodPhase []v1.PodPhase
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scaleUpdated bool
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statusUpdated bool
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@ -261,6 +262,10 @@ func (tc *testCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfa
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if tc.reportedPodReadiness != nil {
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podReadiness = tc.reportedPodReadiness[i]
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}
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var podStartTime metav1.Time
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if tc.reportedPodStartTime != nil {
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podStartTime = tc.reportedPodStartTime[i]
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}
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podPhase := v1.PodRunning
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if tc.reportedPodPhase != nil {
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@ -283,6 +288,7 @@ func (tc *testCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfa
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Status: podReadiness,
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},
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},
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StartTime: &podStartTime,
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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@ -660,6 +666,14 @@ func (tc *testCase) setupController(t *testing.T) (*HorizontalController, inform
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return hpaController, informerFactory
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}
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func hotCpuCreationTime() metav1.Time {
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return metav1.Time{Time: time.Now()}
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}
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func coolCpuCreationTime() metav1.Time {
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return metav1.Time{Time: time.Now().Add(-3 * time.Minute)}
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}
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func (tc *testCase) runTestWithController(t *testing.T, hpaController *HorizontalController, informerFactory informers.SharedInformerFactory) {
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stop := make(chan struct{})
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defer close(stop)
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@ -716,6 +730,23 @@ func TestScaleUpUnreadyLessScale(t *testing.T) {
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tc.runTest(t)
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}
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func TestScaleUpHotCpuLessScale(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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expectedDesiredReplicas: 4,
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CPUTarget: 30,
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CPUCurrent: 60,
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verifyCPUCurrent: true,
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reportedLevels: []uint64{300, 500, 700},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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reportedPodStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime()},
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useMetricsAPI: true,
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}
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tc.runTest(t)
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}
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func TestScaleUpUnreadyNoScale(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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@ -738,6 +769,29 @@ func TestScaleUpUnreadyNoScale(t *testing.T) {
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tc.runTest(t)
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}
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func TestScaleUpHotCpuNoScale(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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expectedDesiredReplicas: 3,
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CPUTarget: 30,
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CPUCurrent: 40,
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verifyCPUCurrent: true,
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reportedLevels: []uint64{400, 500, 700},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
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reportedPodStartTime: []metav1.Time{coolCpuCreationTime(), hotCpuCreationTime(), hotCpuCreationTime()},
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useMetricsAPI: true,
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expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
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Type: autoscalingv2.AbleToScale,
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Status: v1.ConditionTrue,
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Reason: "ReadyForNewScale",
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}),
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}
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tc.runTest(t)
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}
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func TestScaleUpIgnoresFailedPods(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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@ -818,12 +872,12 @@ func TestScaleUpCM(t *testing.T) {
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tc.runTest(t)
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}
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func TestScaleUpCMUnreadyLessScale(t *testing.T) {
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func TestScaleUpCMUnreadyAndHotCpuNoLessScale(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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expectedDesiredReplicas: 4,
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expectedDesiredReplicas: 6,
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CPUTarget: 0,
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metricsTarget: []autoscalingv2.MetricSpec{
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{
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@ -836,17 +890,18 @@ func TestScaleUpCMUnreadyLessScale(t *testing.T) {
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},
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reportedLevels: []uint64{50000, 10000, 30000},
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reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse},
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reportedPodStartTime: []metav1.Time{coolCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime()},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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}
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tc.runTest(t)
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}
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func TestScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
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func TestScaleUpCMUnreadyandCpuHot(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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expectedDesiredReplicas: 3,
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expectedDesiredReplicas: 6,
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CPUTarget: 0,
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metricsTarget: []autoscalingv2.MetricSpec{
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{
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@ -859,11 +914,48 @@ func TestScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
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},
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reportedLevels: []uint64{50000, 15000, 30000},
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reportedPodReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
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reportedPodStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime()},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
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Type: autoscalingv2.AbleToScale,
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Status: v1.ConditionTrue,
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Reason: "ReadyForNewScale",
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Reason: "SucceededRescale",
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}, autoscalingv2.HorizontalPodAutoscalerCondition{
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Type: autoscalingv2.ScalingLimited,
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Status: v1.ConditionTrue,
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Reason: "TooManyReplicas",
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}),
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}
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tc.runTest(t)
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}
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func TestScaleUpHotCpuNoScaleWouldScaleDown(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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expectedDesiredReplicas: 6,
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CPUTarget: 0,
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metricsTarget: []autoscalingv2.MetricSpec{
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{
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Type: autoscalingv2.PodsMetricSourceType,
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Pods: &autoscalingv2.PodsMetricSource{
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MetricName: "qps",
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TargetAverageValue: resource.MustParse("15.0"),
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},
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},
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},
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reportedLevels: []uint64{50000, 15000, 30000},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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reportedPodStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime()},
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expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
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Type: autoscalingv2.AbleToScale,
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Status: v1.ConditionTrue,
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Reason: "SucceededRescale",
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}, autoscalingv2.HorizontalPodAutoscalerCondition{
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Type: autoscalingv2.ScalingLimited,
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Status: v1.ConditionTrue,
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Reason: "TooManyReplicas",
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}),
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}
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tc.runTest(t)
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@ -1043,7 +1135,7 @@ func TestScaleDownPerPodCMExternal(t *testing.T) {
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tc.runTest(t)
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}
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func TestScaleDownIgnoresUnreadyPods(t *testing.T) {
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func TestScaleDownIncludeUnreadyPods(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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@ -1060,6 +1152,23 @@ func TestScaleDownIgnoresUnreadyPods(t *testing.T) {
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tc.runTest(t)
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}
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func TestScaleDownIgnoreHotCpuPods(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 5,
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expectedDesiredReplicas: 2,
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CPUTarget: 50,
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CPUCurrent: 30,
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verifyCPUCurrent: true,
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reportedLevels: []uint64{100, 300, 500, 250, 250},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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useMetricsAPI: true,
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reportedPodStartTime: []metav1.Time{coolCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime(), hotCpuCreationTime()},
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}
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tc.runTest(t)
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}
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func TestScaleDownIgnoresFailedPods(t *testing.T) {
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tc := testCase{
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minReplicas: 2,
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@ -1975,7 +2084,7 @@ func TestAvoidUncessaryUpdates(t *testing.T) {
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verifyCPUCurrent: true,
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reportedLevels: []uint64{400, 500, 700},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
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reportedPodStartTime: []metav1.Time{coolCpuCreationTime(), hotCpuCreationTime(), hotCpuCreationTime()},
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useMetricsAPI: true,
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}
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testClient, _, _, _, _ := tc.prepareTestClient(t)
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@ -222,6 +222,7 @@ func (tc *legacyTestCase) prepareTestClient(t *testing.T) (*fake.Clientset, *sca
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podName := fmt.Sprintf("%s-%d", podNamePrefix, i)
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pod := v1.Pod{
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Status: v1.PodStatus{
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StartTime: &metav1.Time{Time: time.Now().Add(-3 * time.Minute)},
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Phase: v1.PodRunning,
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Conditions: []v1.PodCondition{
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{
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@ -545,8 +546,7 @@ func TestLegacyScaleUpUnreadyLessScale(t *testing.T) {
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initialReplicas: 3,
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desiredReplicas: 4,
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CPUTarget: 30,
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CPUCurrent: 60,
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verifyCPUCurrent: true,
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verifyCPUCurrent: false,
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reportedLevels: []uint64{300, 500, 700},
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reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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reportedPodReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
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@ -634,12 +634,12 @@ func TestLegacyScaleUpCM(t *testing.T) {
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tc.runTest(t)
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}
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func TestLegacyScaleUpCMUnreadyLessScale(t *testing.T) {
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func TestLegacyScaleUpCMUnreadyNoLessScale(t *testing.T) {
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tc := legacyTestCase{
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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desiredReplicas: 4,
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desiredReplicas: 6,
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CPUTarget: 0,
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metricsTarget: []autoscalingv2.MetricSpec{
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{
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@ -662,7 +662,7 @@ func TestLegacyScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
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minReplicas: 2,
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maxReplicas: 6,
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initialReplicas: 3,
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desiredReplicas: 3,
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desiredReplicas: 6,
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CPUTarget: 0,
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metricsTarget: []autoscalingv2.MetricSpec{
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{
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@ -68,6 +68,7 @@ func (tc *legacyReplicaCalcTestCase) prepareTestClient(t *testing.T) *fake.Clien
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pod := v1.Pod{
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Status: v1.PodStatus{
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Phase: v1.PodRunning,
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StartTime: &metav1.Time{Time: time.Now().Add(-3 * time.Minute)},
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Conditions: []v1.PodCondition{
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{
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Type: v1.PodReady,
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@ -310,10 +311,10 @@ func TestLegacyReplicaCalcScaleUpCM(t *testing.T) {
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpCMUnreadyLessScale(t *testing.T) {
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func TestLegacyReplicaCalcScaleUpCMUnreadyNoLessScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 4,
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expectedReplicas: 6,
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podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse},
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metric: &metricInfo{
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name: "qps",
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@ -325,16 +326,16 @@ func TestLegacyReplicaCalcScaleUpCMUnreadyLessScale(t *testing.T) {
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
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func TestLegacyReplicaCalcScaleUpCMUnreadyScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 3,
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expectedReplicas: 7,
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podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
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metric: &metricInfo{
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name: "qps",
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levels: []int64{50000, 15000, 30000},
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targetUtilization: 15000,
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expectedUtilization: 15000,
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expectedUtilization: 31666,
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},
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}
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tc.runTest(t)
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@ -73,41 +73,11 @@ func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUti
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return 0, 0, 0, time.Time{}, fmt.Errorf("no pods returned by selector while calculating replica count")
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}
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requests := make(map[string]int64, itemsLen)
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readyPodCount := 0
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unreadyPods := sets.NewString()
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missingPods := sets.NewString()
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for _, pod := range podList.Items {
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podSum := int64(0)
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for _, container := range pod.Spec.Containers {
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if containerRequest, ok := container.Resources.Requests[resource]; ok {
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podSum += containerRequest.MilliValue()
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} else {
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return 0, 0, 0, time.Time{}, fmt.Errorf("missing request for %s on container %s in pod %s/%s", resource, container.Name, namespace, pod.Name)
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}
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}
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requests[pod.Name] = podSum
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if pod.Status.Phase != v1.PodRunning || !podutil.IsPodReady(&pod) {
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// save this pod name for later, but pretend it doesn't exist for now
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if pod.Status.Phase != v1.PodFailed {
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// Failed pods should not be counted as unready pods as they will
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// not become running anymore.
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unreadyPods.Insert(pod.Name)
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}
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delete(metrics, pod.Name)
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continue
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}
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if _, found := metrics[pod.Name]; !found {
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// save this pod name for later, but pretend it doesn't exist for now
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missingPods.Insert(pod.Name)
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continue
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}
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readyPodCount++
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readyPodCount, ignoredPods, missingPods := groupPods(podList.Items, metrics, resource)
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removeMetricsForPods(metrics, ignoredPods)
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requests, err := calculatePodRequests(podList.Items, resource)
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if err != nil {
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return 0, 0, 0, time.Time{}, err
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}
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if len(metrics) == 0 {
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@ -119,8 +89,8 @@ func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUti
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return 0, 0, 0, time.Time{}, err
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}
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rebalanceUnready := len(unreadyPods) > 0 && usageRatio > 1.0
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if !rebalanceUnready && len(missingPods) == 0 {
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rebalanceIgnored := len(ignoredPods) > 0 && usageRatio > 1.0
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if !rebalanceIgnored && len(missingPods) == 0 {
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if math.Abs(1.0-usageRatio) <= c.tolerance {
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// return the current replicas if the change would be too small
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return currentReplicas, utilization, rawUtilization, timestamp, nil
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@ -144,9 +114,9 @@ func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUti
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}
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}
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if rebalanceUnready {
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if rebalanceIgnored {
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// on a scale-up, treat unready pods as using 0% of the resource request
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for podName := range unreadyPods {
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for podName := range ignoredPods {
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metrics[podName] = 0
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}
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}
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@ -176,7 +146,7 @@ func (c *ReplicaCalculator) GetRawResourceReplicas(currentReplicas int32, target
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return 0, 0, time.Time{}, fmt.Errorf("unable to get metrics for resource %s: %v", resource, err)
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}
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|
||||
replicaCount, utilization, err = c.calcPlainMetricReplicas(metrics, currentReplicas, targetUtilization, namespace, selector)
|
||||
replicaCount, utilization, err = c.calcPlainMetricReplicas(metrics, currentReplicas, targetUtilization, namespace, selector, resource)
|
||||
return replicaCount, utilization, timestamp, err
|
||||
}
|
||||
|
||||
|
|
@ -189,12 +159,12 @@ func (c *ReplicaCalculator) GetMetricReplicas(currentReplicas int32, targetUtili
|
|||
return 0, 0, time.Time{}, fmt.Errorf("unable to get metric %s: %v", metricName, err)
|
||||
}
|
||||
|
||||
replicaCount, utilization, err = c.calcPlainMetricReplicas(metrics, currentReplicas, targetUtilization, namespace, selector)
|
||||
replicaCount, utilization, err = c.calcPlainMetricReplicas(metrics, currentReplicas, targetUtilization, namespace, selector, v1.ResourceName(""))
|
||||
return replicaCount, utilization, timestamp, err
|
||||
}
|
||||
|
||||
// calcPlainMetricReplicas calculates the desired replicas for plain (i.e. non-utilization percentage) metrics.
|
||||
func (c *ReplicaCalculator) calcPlainMetricReplicas(metrics metricsclient.PodMetricsInfo, currentReplicas int32, targetUtilization int64, namespace string, selector labels.Selector) (replicaCount int32, utilization int64, err error) {
|
||||
func (c *ReplicaCalculator) calcPlainMetricReplicas(metrics metricsclient.PodMetricsInfo, currentReplicas int32, targetUtilization int64, namespace string, selector labels.Selector, resource v1.ResourceName) (replicaCount int32, utilization int64, err error) {
|
||||
podList, err := c.podsGetter.Pods(namespace).List(metav1.ListOptions{LabelSelector: selector.String()})
|
||||
if err != nil {
|
||||
return 0, 0, fmt.Errorf("unable to get pods while calculating replica count: %v", err)
|
||||
|
|
@ -204,26 +174,8 @@ func (c *ReplicaCalculator) calcPlainMetricReplicas(metrics metricsclient.PodMet
|
|||
return 0, 0, fmt.Errorf("no pods returned by selector while calculating replica count")
|
||||
}
|
||||
|
||||
readyPodCount := 0
|
||||
unreadyPods := sets.NewString()
|
||||
missingPods := sets.NewString()
|
||||
|
||||
for _, pod := range podList.Items {
|
||||
if pod.Status.Phase != v1.PodRunning || !hasPodBeenReadyBefore(&pod) {
|
||||
// save this pod name for later, but pretend it doesn't exist for now
|
||||
unreadyPods.Insert(pod.Name)
|
||||
delete(metrics, pod.Name)
|
||||
continue
|
||||
}
|
||||
|
||||
if _, found := metrics[pod.Name]; !found {
|
||||
// save this pod name for later, but pretend it doesn't exist for now
|
||||
missingPods.Insert(pod.Name)
|
||||
continue
|
||||
}
|
||||
|
||||
readyPodCount++
|
||||
}
|
||||
readyPodCount, ignoredPods, missingPods := groupPods(podList.Items, metrics, resource)
|
||||
removeMetricsForPods(metrics, ignoredPods)
|
||||
|
||||
if len(metrics) == 0 {
|
||||
return 0, 0, fmt.Errorf("did not receive metrics for any ready pods")
|
||||
|
|
@ -231,9 +183,9 @@ func (c *ReplicaCalculator) calcPlainMetricReplicas(metrics metricsclient.PodMet
|
|||
|
||||
usageRatio, utilization := metricsclient.GetMetricUtilizationRatio(metrics, targetUtilization)
|
||||
|
||||
rebalanceUnready := len(unreadyPods) > 0 && usageRatio > 1.0
|
||||
rebalanceIgnored := len(ignoredPods) > 0 && usageRatio > 1.0
|
||||
|
||||
if !rebalanceUnready && len(missingPods) == 0 {
|
||||
if !rebalanceIgnored && len(missingPods) == 0 {
|
||||
if math.Abs(1.0-usageRatio) <= c.tolerance {
|
||||
// return the current replicas if the change would be too small
|
||||
return currentReplicas, utilization, nil
|
||||
|
|
@ -257,9 +209,9 @@ func (c *ReplicaCalculator) calcPlainMetricReplicas(metrics metricsclient.PodMet
|
|||
}
|
||||
}
|
||||
|
||||
if rebalanceUnready {
|
||||
if rebalanceIgnored {
|
||||
// on a scale-up, treat unready pods as using 0% of the resource request
|
||||
for podName := range unreadyPods {
|
||||
for podName := range ignoredPods {
|
||||
metrics[podName] = 0
|
||||
}
|
||||
}
|
||||
|
|
@ -386,21 +338,58 @@ func (c *ReplicaCalculator) GetExternalPerPodMetricReplicas(currentReplicas int3
|
|||
return replicaCount, utilization, timestamp, nil
|
||||
}
|
||||
|
||||
// hasPodBeenReadyBefore returns true if the pod is ready or if it's not ready
|
||||
func hasPodBeenReadyBefore(pod *v1.Pod) bool {
|
||||
_, readyCondition := podutil.GetPodCondition(&pod.Status, v1.PodReady)
|
||||
if readyCondition == nil {
|
||||
return false
|
||||
func groupPods(pods []v1.Pod, metrics metricsclient.PodMetricsInfo, resource v1.ResourceName) (readyPodCount int, ignoredPods sets.String, missingPods sets.String) {
|
||||
missingPods = sets.NewString()
|
||||
ignoredPods = sets.NewString()
|
||||
for _, pod := range pods {
|
||||
if pod.Status.Phase == v1.PodFailed {
|
||||
continue
|
||||
}
|
||||
if readyCondition.Status == v1.ConditionTrue {
|
||||
return true
|
||||
if _, found := metrics[pod.Name]; !found {
|
||||
missingPods.Insert(pod.Name)
|
||||
continue
|
||||
}
|
||||
lastReady := readyCondition.LastTransitionTime.Time
|
||||
if pod.Status.StartTime == nil {
|
||||
return false
|
||||
if resource == v1.ResourceCPU {
|
||||
var ignorePod bool
|
||||
_, condition := podutil.GetPodCondition(&pod.Status, v1.PodReady)
|
||||
if condition == nil || pod.Status.StartTime == nil {
|
||||
ignorePod = true
|
||||
} else {
|
||||
if condition.Status == v1.ConditionTrue {
|
||||
ignorePod = pod.Status.StartTime.Add(2 * time.Minute).After(time.Now())
|
||||
} else {
|
||||
ignorePod = pod.Status.StartTime.Add(maxDelayOfInitialReadinessStatus).After(condition.LastTransitionTime.Time)
|
||||
}
|
||||
}
|
||||
if ignorePod {
|
||||
ignoredPods.Insert(pod.Name)
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
readyPodCount++
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func calculatePodRequests(pods []v1.Pod, resource v1.ResourceName) (map[string]int64, error) {
|
||||
requests := make(map[string]int64, len(pods))
|
||||
for _, pod := range pods {
|
||||
podSum := int64(0)
|
||||
for _, container := range pod.Spec.Containers {
|
||||
if containerRequest, ok := container.Resources.Requests[resource]; ok {
|
||||
podSum += containerRequest.MilliValue()
|
||||
} else {
|
||||
return nil, fmt.Errorf("missing request for %s", resource)
|
||||
}
|
||||
}
|
||||
requests[pod.Name] = podSum
|
||||
}
|
||||
return requests, nil
|
||||
}
|
||||
|
||||
func removeMetricsForPods(metrics metricsclient.PodMetricsInfo, pods sets.String) {
|
||||
for _, pod := range pods.UnsortedList() {
|
||||
delete(metrics, pod)
|
||||
}
|
||||
started := pod.Status.StartTime.Time
|
||||
// If last status change was longer than maxDelayOfInitialReadinessStatus after the pod was
|
||||
// created assume it was ready in the past.
|
||||
return lastReady.After(started.Add(maxDelayOfInitialReadinessStatus))
|
||||
}
|
||||
|
|
|
|||
|
|
@ -29,10 +29,12 @@ import (
|
|||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/apimachinery/pkg/runtime/schema"
|
||||
"k8s.io/apimachinery/pkg/util/sets"
|
||||
"k8s.io/client-go/kubernetes/fake"
|
||||
core "k8s.io/client-go/testing"
|
||||
"k8s.io/kubernetes/pkg/api/legacyscheme"
|
||||
"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
|
||||
metricsclient "k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
|
||||
cmapi "k8s.io/metrics/pkg/apis/custom_metrics/v1beta1"
|
||||
emapi "k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
|
||||
metricsapi "k8s.io/metrics/pkg/apis/metrics/v1beta1"
|
||||
|
|
@ -88,6 +90,7 @@ type replicaCalcTestCase struct {
|
|||
metric *metricInfo
|
||||
|
||||
podReadiness []v1.ConditionStatus
|
||||
podStartTime []metav1.Time
|
||||
podPhase []v1.PodPhase
|
||||
}
|
||||
|
||||
|
|
@ -111,6 +114,10 @@ func (tc *replicaCalcTestCase) prepareTestClientSet() *fake.Clientset {
|
|||
if tc.podReadiness != nil && i < len(tc.podReadiness) {
|
||||
podReadiness = tc.podReadiness[i]
|
||||
}
|
||||
var podStartTime metav1.Time
|
||||
if tc.podStartTime != nil {
|
||||
podStartTime = tc.podStartTime[i]
|
||||
}
|
||||
podPhase := v1.PodRunning
|
||||
if tc.podPhase != nil {
|
||||
podPhase = tc.podPhase[i]
|
||||
|
|
@ -119,6 +126,7 @@ func (tc *replicaCalcTestCase) prepareTestClientSet() *fake.Clientset {
|
|||
pod := v1.Pod{
|
||||
Status: v1.PodStatus{
|
||||
Phase: podPhase,
|
||||
StartTime: &podStartTime,
|
||||
Conditions: []v1.PodCondition{
|
||||
{
|
||||
Type: v1.PodReady,
|
||||
|
|
@ -439,6 +447,24 @@ func TestReplicaCalcScaleUpUnreadyLessScale(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleUpHotCpuLessScale(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 4,
|
||||
podStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime()},
|
||||
resource: &resourceInfo{
|
||||
name: v1.ResourceCPU,
|
||||
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
||||
levels: []int64{300, 500, 700},
|
||||
|
||||
targetUtilization: 30,
|
||||
expectedUtilization: 60,
|
||||
expectedValue: numContainersPerPod * 600,
|
||||
},
|
||||
}
|
||||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleUpUnreadyNoScale(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
|
|
@ -457,6 +483,25 @@ func TestReplicaCalcScaleUpUnreadyNoScale(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleHotCpuNoScale(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 3,
|
||||
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
||||
podStartTime: []metav1.Time{coolCpuCreationTime(), hotCpuCreationTime(), hotCpuCreationTime()},
|
||||
resource: &resourceInfo{
|
||||
name: v1.ResourceCPU,
|
||||
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
||||
levels: []int64{400, 500, 700},
|
||||
|
||||
targetUtilization: 30,
|
||||
expectedUtilization: 40,
|
||||
expectedValue: numContainersPerPod * 400,
|
||||
},
|
||||
}
|
||||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleUpIgnoresFailedPods(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 2,
|
||||
|
|
@ -491,11 +536,12 @@ func TestReplicaCalcScaleUpCM(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleUpCMUnreadyLessScale(t *testing.T) {
|
||||
func TestReplicaCalcScaleUpCMUnreadyHotCpuNoLessScale(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 4,
|
||||
expectedReplicas: 6,
|
||||
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse},
|
||||
podStartTime: []metav1.Time{coolCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime()},
|
||||
metric: &metricInfo{
|
||||
name: "qps",
|
||||
levels: []int64{50000, 10000, 30000},
|
||||
|
|
@ -507,16 +553,17 @@ func TestReplicaCalcScaleUpCMUnreadyLessScale(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
|
||||
func TestReplicaCalcScaleUpCMUnreadyHotCpuScaleWouldScaleDown(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 3,
|
||||
expectedReplicas: 7,
|
||||
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
|
||||
podStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime()},
|
||||
metric: &metricInfo{
|
||||
name: "qps",
|
||||
levels: []int64{50000, 15000, 30000},
|
||||
targetUtilization: 15000,
|
||||
expectedUtilization: 15000,
|
||||
expectedUtilization: 31666,
|
||||
metricType: podMetric,
|
||||
},
|
||||
}
|
||||
|
|
@ -709,7 +756,7 @@ func TestReplicaCalcScaleDownPerPodCMExternal(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleDownIgnoresUnreadyPods(t *testing.T) {
|
||||
func TestReplicaCalcScaleDownIncludeUnreadyPods(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 5,
|
||||
expectedReplicas: 2,
|
||||
|
|
@ -727,6 +774,24 @@ func TestReplicaCalcScaleDownIgnoresUnreadyPods(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleDownIgnoreHotCpuPods(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 5,
|
||||
expectedReplicas: 2,
|
||||
podStartTime: []metav1.Time{coolCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime(), hotCpuCreationTime(), hotCpuCreationTime()},
|
||||
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")},
|
||||
levels: []int64{100, 300, 500, 250, 250},
|
||||
|
||||
targetUtilization: 50,
|
||||
expectedUtilization: 30,
|
||||
expectedValue: numContainersPerPod * 300,
|
||||
},
|
||||
}
|
||||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcScaleDownIgnoresFailedPods(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 5,
|
||||
|
|
@ -943,7 +1008,7 @@ func TestReplicaCalcMissingMetricsNoChangeLt(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcMissingMetricsUnreadyNoChange(t *testing.T) {
|
||||
func TestReplicaCalcMissingMetricsUnreadyChange(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 3,
|
||||
|
|
@ -961,6 +1026,24 @@ func TestReplicaCalcMissingMetricsUnreadyNoChange(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcMissingMetricsHotCpuNoChange(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 3,
|
||||
podStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime()},
|
||||
resource: &resourceInfo{
|
||||
name: v1.ResourceCPU,
|
||||
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
||||
levels: []int64{100, 450},
|
||||
|
||||
targetUtilization: 50,
|
||||
expectedUtilization: 45,
|
||||
expectedValue: numContainersPerPod * 450,
|
||||
},
|
||||
}
|
||||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcMissingMetricsUnreadyScaleUp(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
|
|
@ -979,6 +1062,25 @@ func TestReplicaCalcMissingMetricsUnreadyScaleUp(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcMissingMetricsHotCpuScaleUp(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 3,
|
||||
expectedReplicas: 4,
|
||||
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
|
||||
podStartTime: []metav1.Time{hotCpuCreationTime(), coolCpuCreationTime(), coolCpuCreationTime()},
|
||||
resource: &resourceInfo{
|
||||
name: v1.ResourceCPU,
|
||||
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
||||
levels: []int64{100, 2000},
|
||||
|
||||
targetUtilization: 50,
|
||||
expectedUtilization: 200,
|
||||
expectedValue: numContainersPerPod * 2000,
|
||||
},
|
||||
}
|
||||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestReplicaCalcMissingMetricsUnreadyScaleDown(t *testing.T) {
|
||||
tc := replicaCalcTestCase{
|
||||
currentReplicas: 4,
|
||||
|
|
@ -1069,74 +1171,183 @@ func TestReplicaCalcComputedToleranceAlgImplementation(t *testing.T) {
|
|||
tc.runTest(t)
|
||||
}
|
||||
|
||||
func TestHasPodBeenReadyBefore(t *testing.T) {
|
||||
func TestGroupPods(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
conditions []v1.PodCondition
|
||||
started time.Time
|
||||
expected bool
|
||||
pods []v1.Pod
|
||||
metrics metricsclient.PodMetricsInfo
|
||||
resource v1.ResourceName
|
||||
expectReadyPodCount int
|
||||
expectUnreadyPods sets.String
|
||||
expectMissingPods sets.String
|
||||
}{
|
||||
{
|
||||
"initially unready",
|
||||
[]v1.PodCondition{
|
||||
"void",
|
||||
[]v1.Pod{},
|
||||
metricsclient.PodMetricsInfo{},
|
||||
v1.ResourceName(""),
|
||||
0,
|
||||
sets.NewString(),
|
||||
sets.NewString(),
|
||||
},
|
||||
{
|
||||
"a ready pod",
|
||||
[]v1.Pod{
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "bentham",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
},
|
||||
},
|
||||
},
|
||||
metricsclient.PodMetricsInfo{
|
||||
"bentham": 1,
|
||||
},
|
||||
v1.ResourceName("hedons"),
|
||||
1,
|
||||
sets.NewString(),
|
||||
sets.NewString(),
|
||||
},
|
||||
{
|
||||
"an unready pod",
|
||||
[]v1.Pod{
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "lucretius",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now(),
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
metricsclient.PodMetricsInfo{
|
||||
"lucretius": 1,
|
||||
},
|
||||
v1.ResourceCPU,
|
||||
0,
|
||||
sets.NewString("lucretius"),
|
||||
sets.NewString(),
|
||||
},
|
||||
{
|
||||
"a ready cpu pod",
|
||||
[]v1.Pod{
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "niccolo",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now().Add(-3 * time.Minute),
|
||||
},
|
||||
Conditions: []v1.PodCondition{
|
||||
{
|
||||
Type: v1.PodReady,
|
||||
LastTransitionTime: metav1.Time{
|
||||
Time: metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
},
|
||||
Status: v1.ConditionFalse,
|
||||
},
|
||||
},
|
||||
metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
false,
|
||||
},
|
||||
{
|
||||
"currently unready",
|
||||
[]v1.PodCondition{
|
||||
{
|
||||
Type: v1.PodReady,
|
||||
LastTransitionTime: metav1.Time{
|
||||
Time: metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
},
|
||||
Status: v1.ConditionFalse,
|
||||
},
|
||||
},
|
||||
metav1.Date(2018, 7, 25, 17, 0, 0, 0, time.UTC).Time,
|
||||
true,
|
||||
},
|
||||
{
|
||||
"currently ready",
|
||||
[]v1.PodCondition{
|
||||
{
|
||||
Type: v1.PodReady,
|
||||
LastTransitionTime: metav1.Time{
|
||||
Time: metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
},
|
||||
LastTransitionTime: metav1.Time{Time: time.Now().Add(-3 * time.Minute)},
|
||||
Status: v1.ConditionTrue,
|
||||
},
|
||||
},
|
||||
metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
true,
|
||||
},
|
||||
},
|
||||
},
|
||||
metricsclient.PodMetricsInfo{
|
||||
"niccolo": 1,
|
||||
},
|
||||
v1.ResourceCPU,
|
||||
1,
|
||||
sets.NewString(),
|
||||
sets.NewString(),
|
||||
},
|
||||
{
|
||||
"no ready status",
|
||||
[]v1.PodCondition{},
|
||||
metav1.Date(2018, 7, 25, 17, 10, 0, 0, time.UTC).Time,
|
||||
false,
|
||||
"a missing pod",
|
||||
[]v1.Pod{
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "epicurus",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now().Add(-3 * time.Minute),
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
metricsclient.PodMetricsInfo{},
|
||||
v1.ResourceCPU,
|
||||
0,
|
||||
sets.NewString(),
|
||||
sets.NewString("epicurus"),
|
||||
},
|
||||
{
|
||||
"all together",
|
||||
[]v1.Pod{
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "lucretius",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now(),
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "niccolo",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now().Add(-3 * time.Minute),
|
||||
},
|
||||
Conditions: []v1.PodCondition{
|
||||
{
|
||||
Type: v1.PodReady,
|
||||
LastTransitionTime: metav1.Time{Time: time.Now().Add(-3 * time.Minute)},
|
||||
Status: v1.ConditionTrue,
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "epicurus",
|
||||
},
|
||||
Status: v1.PodStatus{
|
||||
Phase: v1.PodSucceeded,
|
||||
StartTime: &metav1.Time{
|
||||
Time: time.Now().Add(-3 * time.Minute),
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
metricsclient.PodMetricsInfo{
|
||||
"lucretius": 1,
|
||||
"niccolo": 1,
|
||||
},
|
||||
v1.ResourceCPU,
|
||||
1,
|
||||
sets.NewString("lucretius"),
|
||||
sets.NewString("epicurus"),
|
||||
},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
pod := &v1.Pod{
|
||||
Status: v1.PodStatus{
|
||||
Conditions: tc.conditions,
|
||||
StartTime: &metav1.Time{
|
||||
Time: tc.started,
|
||||
},
|
||||
},
|
||||
readyPodCount, unreadyPods, missingPods := groupPods(tc.pods, tc.metrics, tc.resource)
|
||||
if readyPodCount != tc.expectReadyPodCount {
|
||||
t.Errorf("%s got readyPodCount %d, expected %d", tc.name, readyPodCount, tc.expectReadyPodCount)
|
||||
}
|
||||
got := hasPodBeenReadyBefore(pod)
|
||||
if got != tc.expected {
|
||||
t.Errorf("[TestHasPodBeenReadyBefore.%s] got %v, want %v", tc.name, got, tc.expected)
|
||||
if !unreadyPods.Equal(tc.expectUnreadyPods) {
|
||||
t.Errorf("%s got unreadyPods %v, expected %v", tc.name, unreadyPods, tc.expectUnreadyPods)
|
||||
}
|
||||
if !missingPods.Equal(tc.expectMissingPods) {
|
||||
t.Errorf("%s got missingPods %v, expected %v", tc.name, missingPods, tc.expectMissingPods)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue