80e279d353
This change adds pending pods to the ignored set first before selecting pods missing metrics. Pending pods are always ignored when calculating scale. When the HPA decides which pods and metric values to take into account when scaling, it divides the pods into three disjoint subsets: 1) ready 2) missing metrics and 3) ignored. First the HPA selects pods which are missing metrics. Then it selects pods should be ignored because they are not ready yet, or are still consuming CPU during initialization. All the remaining pods go into the ready set. After the HPA has decided what direction it wants to scale based on the ready pods, it considers what might have happened if it had the missing metrics. It makes a conservative guess about what the missing metrics might have been, 0% if it wants to scale up--100% if it wants to scale down. This is a good thing when scaling up, because newly added pods will likely help reduce the usage ratio, even though their metrics are missing at the moment. The HPA should wait to see the results of its previous scale decision before it makes another one. However when scaling down, it means that many missing metrics can pin the HPA at high scale, even when load is completely removed. In particular, when there are many unschedulable pods due to insufficient cluster capacity, the many missing metrics (assumed to be 100%) can cause the HPA to avoid scaling down indefinitely.
1674 lines
52 KiB
Go
1674 lines
52 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package podautoscaler
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import (
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"fmt"
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"math"
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"testing"
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"time"
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autoscalingv2 "k8s.io/api/autoscaling/v2beta2"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/meta/testrestmapper"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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core "k8s.io/client-go/testing"
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"k8s.io/kubernetes/pkg/api/legacyscheme"
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"k8s.io/kubernetes/pkg/controller"
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metricsclient "k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
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cmapi "k8s.io/metrics/pkg/apis/custom_metrics/v1beta2"
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emapi "k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
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metricsapi "k8s.io/metrics/pkg/apis/metrics/v1beta1"
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metricsfake "k8s.io/metrics/pkg/client/clientset/versioned/fake"
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cmfake "k8s.io/metrics/pkg/client/custom_metrics/fake"
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emfake "k8s.io/metrics/pkg/client/external_metrics/fake"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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type resourceInfo struct {
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name v1.ResourceName
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requests []resource.Quantity
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levels []int64
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// only applies to pod names returned from "heapster"
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podNames []string
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targetUtilization int32
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expectedUtilization int32
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expectedValue int64
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}
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type metricType int
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const (
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objectMetric metricType = iota
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objectPerPodMetric
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externalMetric
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externalPerPodMetric
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podMetric
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)
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type metricInfo struct {
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name string
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levels []int64
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singleObject *autoscalingv2.CrossVersionObjectReference
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selector *metav1.LabelSelector
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metricType metricType
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targetUtilization int64
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perPodTargetUtilization int64
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expectedUtilization int64
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}
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type replicaCalcTestCase struct {
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currentReplicas int32
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expectedReplicas int32
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expectedError error
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timestamp time.Time
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resource *resourceInfo
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metric *metricInfo
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metricLabelSelector labels.Selector
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podReadiness []v1.ConditionStatus
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podStartTime []metav1.Time
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podPhase []v1.PodPhase
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podDeletionTimestamp []bool
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}
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const (
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testNamespace = "test-namespace"
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podNamePrefix = "test-pod"
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numContainersPerPod = 2
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)
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func (tc *replicaCalcTestCase) prepareTestClientSet() *fake.Clientset {
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fakeClient := &fake.Clientset{}
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fakeClient.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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obj := &v1.PodList{}
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podsCount := int(tc.currentReplicas)
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// Failed pods are not included in tc.currentReplicas
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if tc.podPhase != nil && len(tc.podPhase) > podsCount {
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podsCount = len(tc.podPhase)
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}
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for i := 0; i < podsCount; i++ {
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podReadiness := v1.ConditionTrue
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if tc.podReadiness != nil && i < len(tc.podReadiness) {
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podReadiness = tc.podReadiness[i]
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}
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var podStartTime metav1.Time
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if tc.podStartTime != nil {
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podStartTime = tc.podStartTime[i]
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}
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podPhase := v1.PodRunning
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if tc.podPhase != nil {
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podPhase = tc.podPhase[i]
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}
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podDeletionTimestamp := false
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if tc.podDeletionTimestamp != nil {
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podDeletionTimestamp = tc.podDeletionTimestamp[i]
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}
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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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Phase: podPhase,
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StartTime: &podStartTime,
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Conditions: []v1.PodCondition{
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{
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Type: v1.PodReady,
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Status: podReadiness,
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},
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},
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: testNamespace,
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Labels: map[string]string{
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"name": podNamePrefix,
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},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{{}, {}},
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},
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}
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if podDeletionTimestamp {
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pod.DeletionTimestamp = &metav1.Time{Time: time.Now()}
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}
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if tc.resource != nil && i < len(tc.resource.requests) {
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pod.Spec.Containers[0].Resources = v1.ResourceRequirements{
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Requests: v1.ResourceList{
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tc.resource.name: tc.resource.requests[i],
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},
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}
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pod.Spec.Containers[1].Resources = v1.ResourceRequirements{
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Requests: v1.ResourceList{
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tc.resource.name: tc.resource.requests[i],
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},
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}
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}
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obj.Items = append(obj.Items, pod)
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}
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return true, obj, nil
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})
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return fakeClient
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}
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func (tc *replicaCalcTestCase) prepareTestMetricsClient() *metricsfake.Clientset {
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fakeMetricsClient := &metricsfake.Clientset{}
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// NB: we have to sound like Gollum due to gengo's inability to handle already-plural resource names
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fakeMetricsClient.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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if tc.resource != nil {
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metrics := &metricsapi.PodMetricsList{}
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for i, resValue := range tc.resource.levels {
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podName := fmt.Sprintf("%s-%d", podNamePrefix, i)
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if len(tc.resource.podNames) > i {
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podName = tc.resource.podNames[i]
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}
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// NB: the list reactor actually does label selector filtering for us,
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// so we have to make sure our results match the label selector
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podMetric := metricsapi.PodMetrics{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: testNamespace,
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Labels: map[string]string{"name": podNamePrefix},
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},
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Timestamp: metav1.Time{Time: tc.timestamp},
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Window: metav1.Duration{Duration: time.Minute},
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Containers: make([]metricsapi.ContainerMetrics, numContainersPerPod),
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}
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for i := 0; i < numContainersPerPod; i++ {
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podMetric.Containers[i] = metricsapi.ContainerMetrics{
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Name: fmt.Sprintf("container%v", i),
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Usage: v1.ResourceList{
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v1.ResourceName(tc.resource.name): *resource.NewMilliQuantity(
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int64(resValue),
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resource.DecimalSI),
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},
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}
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}
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metrics.Items = append(metrics.Items, podMetric)
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}
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return true, metrics, nil
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}
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return true, nil, fmt.Errorf("no pod resource metrics specified in test client")
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})
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return fakeMetricsClient
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}
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func (tc *replicaCalcTestCase) prepareTestCMClient(t *testing.T) *cmfake.FakeCustomMetricsClient {
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fakeCMClient := &cmfake.FakeCustomMetricsClient{}
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fakeCMClient.AddReactor("get", "*", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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getForAction, wasGetFor := action.(cmfake.GetForAction)
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if !wasGetFor {
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return true, nil, fmt.Errorf("expected a get-for action, got %v instead", action)
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}
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if tc.metric == nil {
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return true, nil, fmt.Errorf("no custom metrics specified in test client")
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}
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assert.Equal(t, tc.metric.name, getForAction.GetMetricName(), "the metric requested should have matched the one specified")
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if getForAction.GetName() == "*" {
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metrics := cmapi.MetricValueList{}
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// multiple objects
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assert.Equal(t, "pods", getForAction.GetResource().Resource, "the type of object that we requested multiple metrics for should have been pods")
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for i, level := range tc.metric.levels {
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podMetric := cmapi.MetricValue{
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DescribedObject: v1.ObjectReference{
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Kind: "Pod",
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Name: fmt.Sprintf("%s-%d", podNamePrefix, i),
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Namespace: testNamespace,
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},
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Timestamp: metav1.Time{Time: tc.timestamp},
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Metric: cmapi.MetricIdentifier{
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Name: tc.metric.name,
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},
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Value: *resource.NewMilliQuantity(level, resource.DecimalSI),
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}
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metrics.Items = append(metrics.Items, podMetric)
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}
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return true, &metrics, nil
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}
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name := getForAction.GetName()
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mapper := testrestmapper.TestOnlyStaticRESTMapper(legacyscheme.Scheme)
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metrics := &cmapi.MetricValueList{}
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assert.NotNil(t, tc.metric.singleObject, "should have only requested a single-object metric when calling GetObjectMetricReplicas")
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gk := schema.FromAPIVersionAndKind(tc.metric.singleObject.APIVersion, tc.metric.singleObject.Kind).GroupKind()
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mapping, err := mapper.RESTMapping(gk)
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if err != nil {
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return true, nil, fmt.Errorf("unable to get mapping for %s: %v", gk.String(), err)
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}
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groupResource := mapping.Resource.GroupResource()
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assert.Equal(t, groupResource.String(), getForAction.GetResource().Resource, "should have requested metrics for the resource matching the GroupKind passed in")
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assert.Equal(t, tc.metric.singleObject.Name, name, "should have requested metrics for the object matching the name passed in")
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metrics.Items = []cmapi.MetricValue{
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{
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DescribedObject: v1.ObjectReference{
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Kind: tc.metric.singleObject.Kind,
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APIVersion: tc.metric.singleObject.APIVersion,
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Name: name,
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},
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Timestamp: metav1.Time{Time: tc.timestamp},
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Metric: cmapi.MetricIdentifier{
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Name: tc.metric.name,
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},
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Value: *resource.NewMilliQuantity(int64(tc.metric.levels[0]), resource.DecimalSI),
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},
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}
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return true, metrics, nil
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})
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return fakeCMClient
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}
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func (tc *replicaCalcTestCase) prepareTestEMClient(t *testing.T) *emfake.FakeExternalMetricsClient {
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fakeEMClient := &emfake.FakeExternalMetricsClient{}
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fakeEMClient.AddReactor("list", "*", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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listAction, wasList := action.(core.ListAction)
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if !wasList {
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return true, nil, fmt.Errorf("expected a list-for action, got %v instead", action)
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}
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if tc.metric == nil {
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return true, nil, fmt.Errorf("no external metrics specified in test client")
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}
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assert.Equal(t, tc.metric.name, listAction.GetResource().Resource, "the metric requested should have matched the one specified")
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selector, err := metav1.LabelSelectorAsSelector(tc.metric.selector)
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if err != nil {
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return true, nil, fmt.Errorf("failed to convert label selector specified in test client")
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}
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assert.Equal(t, selector, listAction.GetListRestrictions().Labels, "the metric selector should have matched the one specified")
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metrics := emapi.ExternalMetricValueList{}
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for _, level := range tc.metric.levels {
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metric := emapi.ExternalMetricValue{
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Timestamp: metav1.Time{Time: tc.timestamp},
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MetricName: tc.metric.name,
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Value: *resource.NewMilliQuantity(level, resource.DecimalSI),
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}
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metrics.Items = append(metrics.Items, metric)
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}
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return true, &metrics, nil
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})
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return fakeEMClient
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}
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func (tc *replicaCalcTestCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfake.Clientset, *cmfake.FakeCustomMetricsClient, *emfake.FakeExternalMetricsClient) {
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fakeClient := tc.prepareTestClientSet()
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fakeMetricsClient := tc.prepareTestMetricsClient()
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fakeCMClient := tc.prepareTestCMClient(t)
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fakeEMClient := tc.prepareTestEMClient(t)
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return fakeClient, fakeMetricsClient, fakeCMClient, fakeEMClient
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}
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func (tc *replicaCalcTestCase) runTest(t *testing.T) {
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testClient, testMetricsClient, testCMClient, testEMClient := tc.prepareTestClient(t)
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metricsClient := metricsclient.NewRESTMetricsClient(testMetricsClient.MetricsV1beta1(), testCMClient, testEMClient)
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informerFactory := informers.NewSharedInformerFactory(testClient, controller.NoResyncPeriodFunc())
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informer := informerFactory.Core().V1().Pods()
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replicaCalc := NewReplicaCalculator(metricsClient, informer.Lister(), defaultTestingTolerance, defaultTestingCpuInitializationPeriod, defaultTestingDelayOfInitialReadinessStatus)
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stop := make(chan struct{})
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defer close(stop)
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informerFactory.Start(stop)
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if !controller.WaitForCacheSync("HPA", stop, informer.Informer().HasSynced) {
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return
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}
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selector, err := metav1.LabelSelectorAsSelector(&metav1.LabelSelector{
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MatchLabels: map[string]string{"name": podNamePrefix},
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})
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if err != nil {
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require.Nil(t, err, "something went horribly wrong...")
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}
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if tc.resource != nil {
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outReplicas, outUtilization, outRawValue, outTimestamp, err := replicaCalc.GetResourceReplicas(tc.currentReplicas, tc.resource.targetUtilization, tc.resource.name, testNamespace, selector)
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if tc.expectedError != nil {
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require.Error(t, err, "there should be an error calculating the replica count")
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assert.Contains(t, err.Error(), tc.expectedError.Error(), "the error message should have contained the expected error message")
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return
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}
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require.NoError(t, err, "there should not have been an error calculating the replica count")
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assert.Equal(t, tc.expectedReplicas, outReplicas, "replicas should be as expected")
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assert.Equal(t, tc.resource.expectedUtilization, outUtilization, "utilization should be as expected")
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assert.Equal(t, tc.resource.expectedValue, outRawValue, "raw value should be as expected")
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assert.True(t, tc.timestamp.Equal(outTimestamp), "timestamp should be as expected")
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return
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}
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|
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var outReplicas int32
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var outUtilization int64
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var outTimestamp time.Time
|
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switch tc.metric.metricType {
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case objectMetric:
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if tc.metric.singleObject == nil {
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t.Fatal("Metric specified as objectMetric but metric.singleObject is nil.")
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}
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outReplicas, outUtilization, outTimestamp, err = replicaCalc.GetObjectMetricReplicas(tc.currentReplicas, tc.metric.targetUtilization, tc.metric.name, testNamespace, tc.metric.singleObject, selector, nil)
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case objectPerPodMetric:
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if tc.metric.singleObject == nil {
|
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t.Fatal("Metric specified as objectMetric but metric.singleObject is nil.")
|
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}
|
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outReplicas, outUtilization, outTimestamp, err = replicaCalc.GetObjectPerPodMetricReplicas(tc.currentReplicas, tc.metric.perPodTargetUtilization, tc.metric.name, testNamespace, tc.metric.singleObject, nil)
|
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case externalMetric:
|
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if tc.metric.selector == nil {
|
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t.Fatal("Metric specified as externalMetric but metric.selector is nil.")
|
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}
|
|
if tc.metric.targetUtilization <= 0 {
|
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t.Fatalf("Metric specified as externalMetric but metric.targetUtilization is %d which is <=0.", tc.metric.targetUtilization)
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}
|
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outReplicas, outUtilization, outTimestamp, err = replicaCalc.GetExternalMetricReplicas(tc.currentReplicas, tc.metric.targetUtilization, tc.metric.name, testNamespace, tc.metric.selector, selector)
|
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case externalPerPodMetric:
|
|
if tc.metric.selector == nil {
|
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t.Fatal("Metric specified as externalPerPodMetric but metric.selector is nil.")
|
|
}
|
|
if tc.metric.perPodTargetUtilization <= 0 {
|
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t.Fatalf("Metric specified as externalPerPodMetric but metric.perPodTargetUtilization is %d which is <=0.", tc.metric.perPodTargetUtilization)
|
|
}
|
|
|
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outReplicas, outUtilization, outTimestamp, err = replicaCalc.GetExternalPerPodMetricReplicas(tc.currentReplicas, tc.metric.perPodTargetUtilization, tc.metric.name, testNamespace, tc.metric.selector)
|
|
case podMetric:
|
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outReplicas, outUtilization, outTimestamp, err = replicaCalc.GetMetricReplicas(tc.currentReplicas, tc.metric.targetUtilization, tc.metric.name, testNamespace, selector, nil)
|
|
default:
|
|
t.Fatalf("Unknown metric type: %d", tc.metric.metricType)
|
|
}
|
|
|
|
if tc.expectedError != nil {
|
|
require.Error(t, err, "there should be an error calculating the replica count")
|
|
assert.Contains(t, err.Error(), tc.expectedError.Error(), "the error message should have contained the expected error message")
|
|
return
|
|
}
|
|
require.NoError(t, err, "there should not have been an error calculating the replica count")
|
|
assert.Equal(t, tc.expectedReplicas, outReplicas, "replicas should be as expected")
|
|
assert.Equal(t, tc.metric.expectedUtilization, outUtilization, "utilization should be as expected")
|
|
assert.True(t, tc.timestamp.Equal(outTimestamp), "timestamp should be as expected")
|
|
}
|
|
|
|
func TestReplicaCalcDisjointResourcesMetrics(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 1,
|
|
expectedError: fmt.Errorf("no metrics returned matched known pods"),
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0")},
|
|
levels: []int64{100},
|
|
podNames: []string{"an-older-pod-name"},
|
|
|
|
targetUtilization: 100,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUp(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 5,
|
|
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: 50,
|
|
expectedValue: numContainersPerPod * 500,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpUnreadyLessScale(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 4,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
|
|
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 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,
|
|
expectedReplicas: 3,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
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 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,
|
|
expectedReplicas: 4,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
podPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodFailed, v1.PodFailed},
|
|
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 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,
|
|
expectedReplicas: 4,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{20000, 10000, 30000},
|
|
targetUtilization: 15000,
|
|
expectedUtilization: 20000,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMUnreadyHotCpuNoLessScale(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
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},
|
|
targetUtilization: 15000,
|
|
expectedUtilization: 30000,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMUnreadyHotCpuScaleWouldScaleDown(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 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: 31666,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 4,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{20000},
|
|
targetUtilization: 15000,
|
|
expectedUtilization: 20000,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMPerPodObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 4,
|
|
metric: &metricInfo{
|
|
metricType: objectPerPodMetric,
|
|
name: "qps",
|
|
levels: []int64{20000},
|
|
perPodTargetUtilization: 5000,
|
|
expectedUtilization: 6667,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMObjectIgnoresUnreadyPods(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 5, // If we did not ignore unready pods, we'd expect 15 replicas.
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{50000},
|
|
targetUtilization: 10000,
|
|
expectedUtilization: 50000,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 1,
|
|
expectedReplicas: 2,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
targetUtilization: 4400,
|
|
expectedUtilization: 8600,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMExternalIgnoresUnreadyPods(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 2, // Would expect 6 if we didn't ignore unready pods
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
targetUtilization: 4400,
|
|
expectedUtilization: 8600,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpCMExternalNoLabels(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 1,
|
|
expectedReplicas: 2,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
targetUtilization: 4400,
|
|
expectedUtilization: 8600,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleUpPerPodCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 4,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
perPodTargetUtilization: 2150,
|
|
expectedUtilization: 2867,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalPerPodMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDown(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
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: 28,
|
|
expectedValue: numContainersPerPod * 280,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownCM(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{12000, 12000, 12000, 12000, 12000},
|
|
targetUtilization: 20000,
|
|
expectedUtilization: 12000,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownPerPodCMObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{6000},
|
|
perPodTargetUtilization: 2000,
|
|
expectedUtilization: 1200,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
metricType: objectPerPodMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownCMObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{12000},
|
|
targetUtilization: 20000,
|
|
expectedUtilization: 12000,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
targetUtilization: 14334,
|
|
expectedUtilization: 8600,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownPerPodCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
perPodTargetUtilization: 2867,
|
|
expectedUtilization: 1720,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalPerPodMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcScaleDownIncludeUnreadyPods(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 2,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
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 TestReplicaCalcScaleDownExcludeUnscheduledPods(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 5,
|
|
expectedReplicas: 1,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse, v1.ConditionFalse, v1.ConditionFalse},
|
|
podPhase: []v1.PodPhase{v1.PodRunning, v1.PodPending, v1.PodPending, v1.PodPending, v1.PodPending},
|
|
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},
|
|
|
|
targetUtilization: 50,
|
|
expectedUtilization: 10,
|
|
expectedValue: numContainersPerPod * 100,
|
|
},
|
|
}
|
|
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,
|
|
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.PodFailed, v1.PodFailed},
|
|
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 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,
|
|
expectedReplicas: 3,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
levels: []int64{1010, 1030, 1020},
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 102,
|
|
expectedValue: numContainersPerPod * 1020,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcToleranceCM(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{20000, 21000, 21000},
|
|
targetUtilization: 20000,
|
|
expectedUtilization: 20666,
|
|
metricType: podMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcToleranceCMObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{20666},
|
|
targetUtilization: 20000,
|
|
expectedUtilization: 20666,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcTolerancePerPodCMObject(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 4,
|
|
expectedReplicas: 4,
|
|
metric: &metricInfo{
|
|
metricType: objectPerPodMetric,
|
|
name: "qps",
|
|
levels: []int64{20166},
|
|
perPodTargetUtilization: 5000,
|
|
expectedUtilization: 5042,
|
|
singleObject: &autoscalingv2.CrossVersionObjectReference{
|
|
Kind: "Deployment",
|
|
APIVersion: "apps/v1",
|
|
Name: "some-deployment",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcToleranceCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
targetUtilization: 8888,
|
|
expectedUtilization: 8600,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcTolerancePerPodCMExternal(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 3,
|
|
metric: &metricInfo{
|
|
name: "qps",
|
|
levels: []int64{8600},
|
|
perPodTargetUtilization: 2900,
|
|
expectedUtilization: 2867,
|
|
selector: &metav1.LabelSelector{MatchLabels: map[string]string{"label": "value"}},
|
|
metricType: externalPerPodMetric,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcSuperfluousMetrics(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 4,
|
|
expectedReplicas: 24,
|
|
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{4000, 9500, 3000, 7000, 3200, 2000},
|
|
targetUtilization: 100,
|
|
expectedUtilization: 587,
|
|
expectedValue: numContainersPerPod * 5875,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcMissingMetrics(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 4,
|
|
expectedReplicas: 3,
|
|
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{400, 95},
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 24,
|
|
expectedValue: 495, // numContainersPerPod * 247, for sufficiently large values of 247
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcEmptyMetrics(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 4,
|
|
expectedError: fmt.Errorf("unable to get metrics for resource cpu: no metrics returned from resource metrics API"),
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: []int64{},
|
|
|
|
targetUtilization: 100,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcEmptyCPURequest(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 1,
|
|
expectedError: fmt.Errorf("missing request for"),
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{},
|
|
levels: []int64{200},
|
|
|
|
targetUtilization: 100,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcMissingMetricsNoChangeEq(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: []int64{1000},
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 100,
|
|
expectedValue: numContainersPerPod * 1000,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcMissingMetricsNoChangeGt(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: []int64{1900},
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 190,
|
|
expectedValue: numContainersPerPod * 1900,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcMissingMetricsNoChangeLt(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: []int64{600},
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 60,
|
|
expectedValue: numContainersPerPod * 600,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestReplicaCalcMissingMetricsUnreadyChange(t *testing.T) {
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: 3,
|
|
expectedReplicas: 3,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
|
|
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 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,
|
|
expectedReplicas: 4,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
|
|
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 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,
|
|
expectedReplicas: 3,
|
|
podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue},
|
|
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{100, 100, 100},
|
|
|
|
targetUtilization: 50,
|
|
expectedUtilization: 10,
|
|
expectedValue: numContainersPerPod * 100,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
// TestComputedToleranceAlgImplementation is a regression test which
|
|
// back-calculates a minimal percentage for downscaling based on a small percentage
|
|
// increase in pod utilization which is calibrated against the tolerance value.
|
|
func TestReplicaCalcComputedToleranceAlgImplementation(t *testing.T) {
|
|
|
|
startPods := int32(10)
|
|
// 150 mCPU per pod.
|
|
totalUsedCPUOfAllPods := int64(startPods * 150)
|
|
// Each pod starts out asking for 2X what is really needed.
|
|
// This means we will have a 50% ratio of used/requested
|
|
totalRequestedCPUOfAllPods := int32(2 * totalUsedCPUOfAllPods)
|
|
requestedToUsed := float64(totalRequestedCPUOfAllPods / int32(totalUsedCPUOfAllPods))
|
|
// Spread the amount we ask over 10 pods. We can add some jitter later in reportedLevels.
|
|
perPodRequested := totalRequestedCPUOfAllPods / startPods
|
|
|
|
// Force a minimal scaling event by satisfying (tolerance < 1 - resourcesUsedRatio).
|
|
target := math.Abs(1/(requestedToUsed*(1-defaultTestingTolerance))) + .01
|
|
finalCPUPercentTarget := int32(target * 100)
|
|
resourcesUsedRatio := float64(totalUsedCPUOfAllPods) / float64(float64(totalRequestedCPUOfAllPods)*target)
|
|
|
|
// i.e. .60 * 20 -> scaled down expectation.
|
|
finalPods := int32(math.Ceil(resourcesUsedRatio * float64(startPods)))
|
|
|
|
// To breach tolerance we will create a utilization ratio difference of tolerance to usageRatioToleranceValue)
|
|
tc := replicaCalcTestCase{
|
|
currentReplicas: startPods,
|
|
expectedReplicas: finalPods,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
levels: []int64{
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
},
|
|
requests: []resource.Quantity{
|
|
resource.MustParse(fmt.Sprint(perPodRequested+100) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested-100) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested+10) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested-10) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested+2) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested-2) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested+1) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested-1) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested) + "m"),
|
|
resource.MustParse(fmt.Sprint(perPodRequested) + "m"),
|
|
},
|
|
|
|
targetUtilization: finalCPUPercentTarget,
|
|
expectedUtilization: int32(totalUsedCPUOfAllPods*100) / totalRequestedCPUOfAllPods,
|
|
expectedValue: numContainersPerPod * totalUsedCPUOfAllPods / 10,
|
|
},
|
|
}
|
|
|
|
tc.runTest(t)
|
|
|
|
// Reuse the data structure above, now testing "unscaling".
|
|
// Now, we test that no scaling happens if we are in a very close margin to the tolerance
|
|
target = math.Abs(1/(requestedToUsed*(1-defaultTestingTolerance))) + .004
|
|
finalCPUPercentTarget = int32(target * 100)
|
|
tc.resource.targetUtilization = finalCPUPercentTarget
|
|
tc.currentReplicas = startPods
|
|
tc.expectedReplicas = startPods
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestGroupPods(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
pods []*v1.Pod
|
|
metrics metricsclient.PodMetricsInfo
|
|
resource v1.ResourceName
|
|
expectReadyPodCount int
|
|
expectIgnoredPods sets.String
|
|
expectMissingPods sets.String
|
|
}{
|
|
{
|
|
"void",
|
|
[]*v1.Pod{},
|
|
metricsclient.PodMetricsInfo{},
|
|
v1.ResourceCPU,
|
|
0,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"count in a ready pod - memory",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "bentham",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"bentham": metricsclient.PodMetric{Value: 1, Timestamp: time.Now(), Window: time.Minute},
|
|
},
|
|
v1.ResourceMemory,
|
|
1,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"ignore a pod without ready condition - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "lucretius",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now(),
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"lucretius": metricsclient.PodMetric{Value: 1},
|
|
},
|
|
v1.ResourceCPU,
|
|
0,
|
|
sets.NewString("lucretius"),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"count in a ready pod with fresh metrics during initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "bentham",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now().Add(-1 * time.Minute),
|
|
},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
LastTransitionTime: metav1.Time{Time: time.Now().Add(-30 * time.Second)},
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"bentham": metricsclient.PodMetric{Value: 1, Timestamp: time.Now(), Window: 30 * time.Second},
|
|
},
|
|
v1.ResourceCPU,
|
|
1,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"ignore a ready pod without fresh metrics during initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "bentham",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now().Add(-1 * time.Minute),
|
|
},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
LastTransitionTime: metav1.Time{Time: time.Now().Add(-30 * time.Second)},
|
|
Status: v1.ConditionTrue,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"bentham": metricsclient.PodMetric{Value: 1, Timestamp: time.Now(), Window: 60 * time.Second},
|
|
},
|
|
v1.ResourceCPU,
|
|
0,
|
|
sets.NewString("bentham"),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"ignore an unready pod during initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "lucretius",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now().Add(-10 * time.Minute),
|
|
},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
LastTransitionTime: metav1.Time{Time: time.Now().Add(-9*time.Minute - 54*time.Second)},
|
|
Status: v1.ConditionFalse,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"lucretius": metricsclient.PodMetric{Value: 1},
|
|
},
|
|
v1.ResourceCPU,
|
|
0,
|
|
sets.NewString("lucretius"),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"count in a ready pod without fresh metrics after initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "bentham",
|
|
},
|
|
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,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"bentham": metricsclient.PodMetric{Value: 1, Timestamp: time.Now().Add(-2 * time.Minute), Window: time.Minute},
|
|
},
|
|
v1.ResourceCPU,
|
|
1,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
|
|
{
|
|
"count in an unready pod that was ready after initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "lucretius",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now().Add(-10 * time.Minute),
|
|
},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
LastTransitionTime: metav1.Time{Time: time.Now().Add(-9 * time.Minute)},
|
|
Status: v1.ConditionFalse,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"lucretius": metricsclient.PodMetric{Value: 1},
|
|
},
|
|
v1.ResourceCPU,
|
|
1,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"ignore pod that has never been ready after initialization period - CPU",
|
|
[]*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "lucretius",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodSucceeded,
|
|
StartTime: &metav1.Time{
|
|
Time: time.Now().Add(-10 * time.Minute),
|
|
},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
LastTransitionTime: metav1.Time{Time: time.Now().Add(-9*time.Minute - 50*time.Second)},
|
|
Status: v1.ConditionFalse,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
metricsclient.PodMetricsInfo{
|
|
"lucretius": metricsclient.PodMetric{Value: 1},
|
|
},
|
|
v1.ResourceCPU,
|
|
1,
|
|
sets.NewString(),
|
|
sets.NewString(),
|
|
},
|
|
{
|
|
"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"),
|
|
},
|
|
{
|
|
"several pods",
|
|
[]*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": metricsclient.PodMetric{Value: 1},
|
|
"niccolo": metricsclient.PodMetric{Value: 1},
|
|
},
|
|
v1.ResourceCPU,
|
|
1,
|
|
sets.NewString("lucretius"),
|
|
sets.NewString("epicurus"),
|
|
},
|
|
{
|
|
name: "pending pods are ignored",
|
|
pods: []*v1.Pod{
|
|
{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "unscheduled",
|
|
},
|
|
Status: v1.PodStatus{
|
|
Phase: v1.PodPending,
|
|
},
|
|
},
|
|
},
|
|
metrics: metricsclient.PodMetricsInfo{},
|
|
resource: v1.ResourceCPU,
|
|
expectReadyPodCount: 0,
|
|
expectIgnoredPods: sets.NewString("unscheduled"),
|
|
expectMissingPods: sets.NewString(),
|
|
},
|
|
}
|
|
for _, tc := range tests {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
readyPodCount, ignoredPods, missingPods := groupPods(tc.pods, tc.metrics, tc.resource, defaultTestingCpuInitializationPeriod, defaultTestingDelayOfInitialReadinessStatus)
|
|
if readyPodCount != tc.expectReadyPodCount {
|
|
t.Errorf("%s got readyPodCount %d, expected %d", tc.name, readyPodCount, tc.expectReadyPodCount)
|
|
}
|
|
if !ignoredPods.Equal(tc.expectIgnoredPods) {
|
|
t.Errorf("%s got unreadyPods %v, expected %v", tc.name, ignoredPods, tc.expectIgnoredPods)
|
|
}
|
|
if !missingPods.Equal(tc.expectMissingPods) {
|
|
t.Errorf("%s got missingPods %v, expected %v", tc.name, missingPods, tc.expectMissingPods)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// TODO: add more tests
|