e5f8bfa023
Currently, when performing a scale up, any failed pods (which can be present for example in case of evictions performed by kubelet) will be treated as unready. Unready pods are treated as if they had 0% utilization which will slow down or even block scale up. After this change, failed pods are ignored in all calculations. This way they do not influence neither scale up nor scale down replica calculations.
1993 lines
63 KiB
Go
1993 lines
63 KiB
Go
/*
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Copyright 2015 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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"encoding/json"
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"fmt"
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"math"
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"sync"
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"testing"
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"time"
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autoscalingv1 "k8s.io/api/autoscaling/v1"
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autoscalingv2 "k8s.io/api/autoscaling/v2beta1"
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"k8s.io/api/core/v1"
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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/watch"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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scalefake "k8s.io/client-go/scale/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/apis/autoscaling"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
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cmapi "k8s.io/metrics/pkg/apis/custom_metrics/v1beta1"
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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_generated/clientset/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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_ "k8s.io/kubernetes/pkg/apis/autoscaling/install"
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_ "k8s.io/kubernetes/pkg/apis/extensions/install"
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)
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var statusOk = []autoscalingv2.HorizontalPodAutoscalerCondition{
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{Type: autoscalingv2.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededRescale"},
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{Type: autoscalingv2.ScalingActive, Status: v1.ConditionTrue, Reason: "ValidMetricFound"},
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{Type: autoscalingv2.ScalingLimited, Status: v1.ConditionFalse, Reason: "DesiredWithinRange"},
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}
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// statusOkWithOverrides returns the "ok" status with the given conditions as overridden
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func statusOkWithOverrides(overrides ...autoscalingv2.HorizontalPodAutoscalerCondition) []autoscalingv1.HorizontalPodAutoscalerCondition {
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resv2 := make([]autoscalingv2.HorizontalPodAutoscalerCondition, len(statusOk))
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copy(resv2, statusOk)
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for _, override := range overrides {
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resv2 = setConditionInList(resv2, override.Type, override.Status, override.Reason, override.Message)
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}
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// copy to a v1 slice
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resv1 := make([]autoscalingv1.HorizontalPodAutoscalerCondition, len(resv2))
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for i, cond := range resv2 {
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resv1[i] = autoscalingv1.HorizontalPodAutoscalerCondition{
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Type: autoscalingv1.HorizontalPodAutoscalerConditionType(cond.Type),
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Status: cond.Status,
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Reason: cond.Reason,
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}
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}
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return resv1
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}
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func alwaysReady() bool { return true }
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type fakeResource struct {
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name string
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apiVersion string
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kind string
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}
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type testCase struct {
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sync.Mutex
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minReplicas int32
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maxReplicas int32
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initialReplicas int32
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desiredReplicas int32
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// CPU target utilization as a percentage of the requested resources.
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CPUTarget int32
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CPUCurrent int32
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verifyCPUCurrent bool
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reportedLevels []uint64
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reportedCPURequests []resource.Quantity
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reportedPodReadiness []v1.ConditionStatus
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reportedPodPhase []v1.PodPhase
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scaleUpdated bool
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statusUpdated bool
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eventCreated bool
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verifyEvents bool
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useMetricsAPI bool
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metricsTarget []autoscalingv2.MetricSpec
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expectedConditions []autoscalingv1.HorizontalPodAutoscalerCondition
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// Channel with names of HPA objects which we have reconciled.
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processed chan string
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// Target resource information.
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resource *fakeResource
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// Last scale time
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lastScaleTime *metav1.Time
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// override the test clients
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testClient *fake.Clientset
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testMetricsClient *metricsfake.Clientset
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testCMClient *cmfake.FakeCustomMetricsClient
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testScaleClient *scalefake.FakeScaleClient
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}
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// Needs to be called under a lock.
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func (tc *testCase) computeCPUCurrent() {
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if len(tc.reportedLevels) != len(tc.reportedCPURequests) || len(tc.reportedLevels) == 0 {
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return
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}
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reported := 0
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for _, r := range tc.reportedLevels {
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reported += int(r)
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}
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requested := 0
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for _, req := range tc.reportedCPURequests {
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requested += int(req.MilliValue())
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}
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tc.CPUCurrent = int32(100 * reported / requested)
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}
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func init() {
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// set this high so we don't accidentally run into it when testing
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scaleUpLimitFactor = 8
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}
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func (tc *testCase) prepareTestClient(t *testing.T) (*fake.Clientset, *metricsfake.Clientset, *cmfake.FakeCustomMetricsClient, *emfake.FakeExternalMetricsClient, *scalefake.FakeScaleClient) {
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namespace := "test-namespace"
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hpaName := "test-hpa"
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podNamePrefix := "test-pod"
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labelSet := map[string]string{"name": podNamePrefix}
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selector := labels.SelectorFromSet(labelSet).String()
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tc.Lock()
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tc.scaleUpdated = false
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tc.statusUpdated = false
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tc.eventCreated = false
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tc.processed = make(chan string, 100)
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if tc.CPUCurrent == 0 {
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tc.computeCPUCurrent()
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}
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if tc.resource == nil {
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tc.resource = &fakeResource{
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name: "test-rc",
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apiVersion: "v1",
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kind: "ReplicationController",
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}
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}
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tc.Unlock()
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fakeClient := &fake.Clientset{}
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fakeClient.AddReactor("list", "horizontalpodautoscalers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := &autoscalingv2.HorizontalPodAutoscalerList{
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Items: []autoscalingv2.HorizontalPodAutoscaler{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: hpaName,
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Namespace: namespace,
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SelfLink: "experimental/v1/namespaces/" + namespace + "/horizontalpodautoscalers/" + hpaName,
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},
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Spec: autoscalingv2.HorizontalPodAutoscalerSpec{
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ScaleTargetRef: autoscalingv2.CrossVersionObjectReference{
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Kind: tc.resource.kind,
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Name: tc.resource.name,
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APIVersion: tc.resource.apiVersion,
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},
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MinReplicas: &tc.minReplicas,
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MaxReplicas: tc.maxReplicas,
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},
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Status: autoscalingv2.HorizontalPodAutoscalerStatus{
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CurrentReplicas: tc.initialReplicas,
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DesiredReplicas: tc.initialReplicas,
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LastScaleTime: tc.lastScaleTime,
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},
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},
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},
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}
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if tc.CPUTarget > 0 {
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obj.Items[0].Spec.Metrics = []autoscalingv2.MetricSpec{
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{
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Type: autoscalingv2.ResourceMetricSourceType,
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Resource: &autoscalingv2.ResourceMetricSource{
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Name: v1.ResourceCPU,
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TargetAverageUtilization: &tc.CPUTarget,
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},
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},
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}
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}
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if len(tc.metricsTarget) > 0 {
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obj.Items[0].Spec.Metrics = append(obj.Items[0].Spec.Metrics, tc.metricsTarget...)
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}
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if len(obj.Items[0].Spec.Metrics) == 0 {
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// manually add in the defaulting logic
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obj.Items[0].Spec.Metrics = []autoscalingv2.MetricSpec{
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{
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Type: autoscalingv2.ResourceMetricSourceType,
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Resource: &autoscalingv2.ResourceMetricSource{
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Name: v1.ResourceCPU,
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},
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},
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}
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}
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// and... convert to autoscaling v1 to return the right type
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objv1, err := unsafeConvertToVersionVia(obj, autoscalingv1.SchemeGroupVersion)
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if err != nil {
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return true, nil, err
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}
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return true, objv1, nil
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})
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fakeClient.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := &v1.PodList{}
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for i := 0; i < len(tc.reportedCPURequests); i++ {
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podReadiness := v1.ConditionTrue
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if tc.reportedPodReadiness != nil {
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podReadiness = tc.reportedPodReadiness[i]
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}
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podPhase := v1.PodRunning
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if tc.reportedPodPhase != nil {
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podPhase = tc.reportedPodPhase[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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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: namespace,
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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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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceCPU: tc.reportedCPURequests[i],
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},
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},
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},
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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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fakeClient.AddReactor("update", "horizontalpodautoscalers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := action.(core.UpdateAction).GetObject().(*autoscalingv1.HorizontalPodAutoscaler)
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assert.Equal(t, namespace, obj.Namespace, "the HPA namespace should be as expected")
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assert.Equal(t, hpaName, obj.Name, "the HPA name should be as expected")
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assert.Equal(t, tc.desiredReplicas, obj.Status.DesiredReplicas, "the desired replica count reported in the object status should be as expected")
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if tc.verifyCPUCurrent {
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if assert.NotNil(t, obj.Status.CurrentCPUUtilizationPercentage, "the reported CPU utilization percentage should be non-nil") {
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assert.Equal(t, tc.CPUCurrent, *obj.Status.CurrentCPUUtilizationPercentage, "the report CPU utilization percentage should be as expected")
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}
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}
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var actualConditions []autoscalingv1.HorizontalPodAutoscalerCondition
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if err := json.Unmarshal([]byte(obj.ObjectMeta.Annotations[autoscaling.HorizontalPodAutoscalerConditionsAnnotation]), &actualConditions); err != nil {
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return true, nil, err
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}
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// TODO: it's ok not to sort these becaues statusOk
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// contains all the conditions, so we'll never be appending.
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// Default to statusOk when missing any specific conditions
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if tc.expectedConditions == nil {
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tc.expectedConditions = statusOkWithOverrides()
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}
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// clear the message so that we can easily compare
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for i := range actualConditions {
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actualConditions[i].Message = ""
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actualConditions[i].LastTransitionTime = metav1.Time{}
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}
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assert.Equal(t, tc.expectedConditions, actualConditions, "the status conditions should have been as expected")
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tc.statusUpdated = true
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// Every time we reconcile HPA object we are updating status.
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tc.processed <- obj.Name
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return true, obj, nil
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})
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fakeScaleClient := &scalefake.FakeScaleClient{}
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fakeScaleClient.AddReactor("get", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := &autoscalingv1.Scale{
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ObjectMeta: metav1.ObjectMeta{
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Name: tc.resource.name,
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Namespace: namespace,
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},
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Spec: autoscalingv1.ScaleSpec{
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Replicas: tc.initialReplicas,
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},
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Status: autoscalingv1.ScaleStatus{
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Replicas: tc.initialReplicas,
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Selector: selector,
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},
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}
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return true, obj, nil
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})
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fakeScaleClient.AddReactor("get", "deployments", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := &autoscalingv1.Scale{
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ObjectMeta: metav1.ObjectMeta{
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Name: tc.resource.name,
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Namespace: namespace,
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},
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Spec: autoscalingv1.ScaleSpec{
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Replicas: tc.initialReplicas,
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},
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Status: autoscalingv1.ScaleStatus{
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Replicas: tc.initialReplicas,
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Selector: selector,
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},
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}
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return true, obj, nil
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})
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fakeScaleClient.AddReactor("get", "replicasets", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := &autoscalingv1.Scale{
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ObjectMeta: metav1.ObjectMeta{
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Name: tc.resource.name,
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Namespace: namespace,
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},
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Spec: autoscalingv1.ScaleSpec{
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Replicas: tc.initialReplicas,
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},
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Status: autoscalingv1.ScaleStatus{
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Replicas: tc.initialReplicas,
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Selector: selector,
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},
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}
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return true, obj, nil
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})
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fakeScaleClient.AddReactor("update", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale)
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replicas := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale).Spec.Replicas
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assert.Equal(t, tc.desiredReplicas, replicas, "the replica count of the RC should be as expected")
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tc.scaleUpdated = true
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return true, obj, nil
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})
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fakeScaleClient.AddReactor("update", "deployments", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale)
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replicas := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale).Spec.Replicas
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assert.Equal(t, tc.desiredReplicas, replicas, "the replica count of the deployment should be as expected")
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tc.scaleUpdated = true
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return true, obj, nil
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})
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fakeScaleClient.AddReactor("update", "replicasets", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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obj := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale)
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replicas := action.(core.UpdateAction).GetObject().(*autoscalingv1.Scale).Spec.Replicas
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assert.Equal(t, tc.desiredReplicas, replicas, "the replica count of the replicaset should be as expected")
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tc.scaleUpdated = true
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return true, obj, nil
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})
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fakeWatch := watch.NewFake()
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fakeClient.AddWatchReactor("*", core.DefaultWatchReactor(fakeWatch, nil))
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fakeMetricsClient := &metricsfake.Clientset{}
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fakeMetricsClient.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
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tc.Lock()
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defer tc.Unlock()
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metrics := &metricsapi.PodMetricsList{}
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for i, cpu := range tc.reportedLevels {
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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: fmt.Sprintf("%s-%d", podNamePrefix, i),
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Namespace: namespace,
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Labels: labelSet,
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},
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Timestamp: metav1.Time{Time: time.Now()},
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Containers: []metricsapi.ContainerMetrics{
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{
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Name: "container",
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Usage: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(
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int64(cpu),
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resource.DecimalSI),
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v1.ResourceMemory: *resource.NewQuantity(
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int64(1024*1024),
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resource.BinarySI),
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},
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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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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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tc.Lock()
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defer tc.Unlock()
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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 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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assert.Equal(t, "qps", getForAction.GetMetricName(), "the metric name requested should have been qps, as specified in the metric spec")
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for i, level := range tc.reportedLevels {
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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: namespace,
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},
|
|
Timestamp: metav1.Time{Time: time.Now()},
|
|
MetricName: "qps",
|
|
Value: *resource.NewMilliQuantity(int64(level), resource.DecimalSI),
|
|
}
|
|
metrics.Items = append(metrics.Items, podMetric)
|
|
}
|
|
|
|
return true, metrics, nil
|
|
}
|
|
|
|
name := getForAction.GetName()
|
|
mapper := legacyscheme.Registry.RESTMapper()
|
|
metrics := &cmapi.MetricValueList{}
|
|
var matchedTarget *autoscalingv2.MetricSpec
|
|
for i, target := range tc.metricsTarget {
|
|
if target.Type == autoscalingv2.ObjectMetricSourceType && name == target.Object.Target.Name {
|
|
gk := schema.FromAPIVersionAndKind(target.Object.Target.APIVersion, target.Object.Target.Kind).GroupKind()
|
|
mapping, err := mapper.RESTMapping(gk)
|
|
if err != nil {
|
|
t.Logf("unable to get mapping for %s: %v", gk.String(), err)
|
|
continue
|
|
}
|
|
groupResource := schema.GroupResource{Group: mapping.GroupVersionKind.Group, Resource: mapping.Resource}
|
|
|
|
if getForAction.GetResource().Resource == groupResource.String() {
|
|
matchedTarget = &tc.metricsTarget[i]
|
|
}
|
|
}
|
|
}
|
|
assert.NotNil(t, matchedTarget, "this request should have matched one of the metric specs")
|
|
assert.Equal(t, "qps", getForAction.GetMetricName(), "the metric name requested should have been qps, as specified in the metric spec")
|
|
|
|
metrics.Items = []cmapi.MetricValue{
|
|
{
|
|
DescribedObject: v1.ObjectReference{
|
|
Kind: matchedTarget.Object.Target.Kind,
|
|
APIVersion: matchedTarget.Object.Target.APIVersion,
|
|
Name: name,
|
|
},
|
|
Timestamp: metav1.Time{Time: time.Now()},
|
|
MetricName: "qps",
|
|
Value: *resource.NewMilliQuantity(int64(tc.reportedLevels[0]), resource.DecimalSI),
|
|
},
|
|
}
|
|
|
|
return true, metrics, nil
|
|
})
|
|
|
|
fakeEMClient := &emfake.FakeExternalMetricsClient{}
|
|
|
|
fakeEMClient.AddReactor("list", "*", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
tc.Lock()
|
|
defer tc.Unlock()
|
|
|
|
listAction, wasList := action.(core.ListAction)
|
|
if !wasList {
|
|
return true, nil, fmt.Errorf("expected a list action, got %v instead", action)
|
|
}
|
|
|
|
metrics := &emapi.ExternalMetricValueList{}
|
|
|
|
assert.Equal(t, "qps", listAction.GetResource().Resource, "the metric name requested should have been qps, as specified in the metric spec")
|
|
|
|
for _, level := range tc.reportedLevels {
|
|
metric := emapi.ExternalMetricValue{
|
|
Timestamp: metav1.Time{Time: time.Now()},
|
|
MetricName: "qps",
|
|
Value: *resource.NewMilliQuantity(int64(level), resource.DecimalSI),
|
|
}
|
|
metrics.Items = append(metrics.Items, metric)
|
|
}
|
|
|
|
return true, metrics, nil
|
|
})
|
|
|
|
return fakeClient, fakeMetricsClient, fakeCMClient, fakeEMClient, fakeScaleClient
|
|
}
|
|
|
|
func (tc *testCase) verifyResults(t *testing.T) {
|
|
tc.Lock()
|
|
defer tc.Unlock()
|
|
|
|
assert.Equal(t, tc.initialReplicas != tc.desiredReplicas, tc.scaleUpdated, "the scale should only be updated if we expected a change in replicas")
|
|
assert.True(t, tc.statusUpdated, "the status should have been updated")
|
|
if tc.verifyEvents {
|
|
assert.Equal(t, tc.initialReplicas != tc.desiredReplicas, tc.eventCreated, "an event should have been created only if we expected a change in replicas")
|
|
}
|
|
}
|
|
|
|
func (tc *testCase) setupController(t *testing.T) (*HorizontalController, informers.SharedInformerFactory) {
|
|
testClient, testMetricsClient, testCMClient, testEMClient, testScaleClient := tc.prepareTestClient(t)
|
|
if tc.testClient != nil {
|
|
testClient = tc.testClient
|
|
}
|
|
if tc.testMetricsClient != nil {
|
|
testMetricsClient = tc.testMetricsClient
|
|
}
|
|
if tc.testCMClient != nil {
|
|
testCMClient = tc.testCMClient
|
|
}
|
|
if tc.testScaleClient != nil {
|
|
testScaleClient = tc.testScaleClient
|
|
}
|
|
metricsClient := metrics.NewRESTMetricsClient(
|
|
testMetricsClient.MetricsV1beta1(),
|
|
testCMClient,
|
|
testEMClient,
|
|
)
|
|
|
|
eventClient := &fake.Clientset{}
|
|
eventClient.AddReactor("create", "events", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
tc.Lock()
|
|
defer tc.Unlock()
|
|
|
|
obj := action.(core.CreateAction).GetObject().(*v1.Event)
|
|
if tc.verifyEvents {
|
|
switch obj.Reason {
|
|
case "SuccessfulRescale":
|
|
assert.Equal(t, fmt.Sprintf("New size: %d; reason: cpu resource utilization (percentage of request) above target", tc.desiredReplicas), obj.Message)
|
|
case "DesiredReplicasComputed":
|
|
assert.Equal(t, fmt.Sprintf(
|
|
"Computed the desired num of replicas: %d (avgCPUutil: %d, current replicas: %d)",
|
|
tc.desiredReplicas,
|
|
(int64(tc.reportedLevels[0])*100)/tc.reportedCPURequests[0].MilliValue(), tc.initialReplicas), obj.Message)
|
|
default:
|
|
assert.False(t, true, fmt.Sprintf("Unexpected event: %s / %s", obj.Reason, obj.Message))
|
|
}
|
|
}
|
|
tc.eventCreated = true
|
|
return true, obj, nil
|
|
})
|
|
|
|
replicaCalc := &ReplicaCalculator{
|
|
metricsClient: metricsClient,
|
|
podsGetter: testClient.Core(),
|
|
tolerance: defaultTestingTolerance,
|
|
}
|
|
|
|
informerFactory := informers.NewSharedInformerFactory(testClient, controller.NoResyncPeriodFunc())
|
|
defaultUpscaleForbiddenWindow := 3 * time.Minute
|
|
defaultDownscaleForbiddenWindow := 5 * time.Minute
|
|
|
|
hpaController := NewHorizontalController(
|
|
eventClient.Core(),
|
|
testScaleClient,
|
|
testClient.Autoscaling(),
|
|
legacyscheme.Registry.RESTMapper(),
|
|
replicaCalc,
|
|
informerFactory.Autoscaling().V1().HorizontalPodAutoscalers(),
|
|
controller.NoResyncPeriodFunc(),
|
|
defaultUpscaleForbiddenWindow,
|
|
defaultDownscaleForbiddenWindow,
|
|
)
|
|
hpaController.hpaListerSynced = alwaysReady
|
|
|
|
return hpaController, informerFactory
|
|
}
|
|
|
|
func (tc *testCase) runTestWithController(t *testing.T, hpaController *HorizontalController, informerFactory informers.SharedInformerFactory) {
|
|
stop := make(chan struct{})
|
|
defer close(stop)
|
|
informerFactory.Start(stop)
|
|
go hpaController.Run(stop)
|
|
|
|
tc.Lock()
|
|
if tc.verifyEvents {
|
|
tc.Unlock()
|
|
// We need to wait for events to be broadcasted (sleep for longer than record.sleepDuration).
|
|
time.Sleep(2 * time.Second)
|
|
} else {
|
|
tc.Unlock()
|
|
}
|
|
// Wait for HPA to be processed.
|
|
<-tc.processed
|
|
tc.verifyResults(t)
|
|
}
|
|
|
|
func (tc *testCase) runTest(t *testing.T) {
|
|
hpaController, informerFactory := tc.setupController(t)
|
|
tc.runTestWithController(t, hpaController, informerFactory)
|
|
}
|
|
|
|
func TestScaleUp(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 30,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{300, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpUnreadyLessScale(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 30,
|
|
CPUCurrent: 60,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{300, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpUnreadyNoScale(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 30,
|
|
CPUCurrent: 40,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{400, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpIgnoresFailedPods(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 2,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 30,
|
|
CPUCurrent: 60,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
reportedPodPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodFailed, v1.PodFailed},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpDeployment(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 30,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{300, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
resource: &fakeResource{
|
|
name: "test-dep",
|
|
apiVersion: "extensions/v1beta1",
|
|
kind: "Deployment",
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpReplicaSet(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 30,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{300, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
resource: &fakeResource{
|
|
name: "test-replicaset",
|
|
apiVersion: "extensions/v1beta1",
|
|
kind: "ReplicaSet",
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpCM(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{20000, 10000, 30000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpCMUnreadyLessScale(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{50000, 10000, 30000},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpCMUnreadyNoScaleWouldScaleDown(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{50000, 15000, 30000},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpCMObject(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ObjectMetricSourceType,
|
|
Object: &autoscalingv2.ObjectMetricSource{
|
|
Target: autoscalingv2.CrossVersionObjectReference{
|
|
APIVersion: "extensions/v1beta1",
|
|
Kind: "Deployment",
|
|
Name: "some-deployment",
|
|
},
|
|
MetricName: "qps",
|
|
TargetValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{20000},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetValue: resource.NewMilliQuantity(6666, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpPerPodCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 4,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.NewMilliQuantity(2222, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDown(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 50,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{100, 300, 500, 250, 250},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownCM(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("20.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{12000, 12000, 12000, 12000, 12000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownCMObject(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ObjectMetricSourceType,
|
|
Object: &autoscalingv2.ObjectMetricSource{
|
|
Target: autoscalingv2.CrossVersionObjectReference{
|
|
APIVersion: "extensions/v1beta1",
|
|
Kind: "Deployment",
|
|
Name: "some-deployment",
|
|
},
|
|
MetricName: "qps",
|
|
TargetValue: resource.MustParse("20.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{12000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetValue: resource.NewMilliQuantity(14400, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownPerPodCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.NewMilliQuantity(3000, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownIgnoresUnreadyPods(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 50,
|
|
CPUCurrent: 30,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{100, 300, 500, 250, 250},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownIgnoresFailedPods(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 5,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 50,
|
|
CPUCurrent: 28,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{100, 300, 500, 250, 250},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
reportedPodPhase: []v1.PodPhase{v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodRunning, v1.PodFailed, v1.PodFailed},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestTolerance(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{1010, 1030, 1020},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestToleranceCM(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("20.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{20000, 20001, 21000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestToleranceCMObject(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ObjectMetricSourceType,
|
|
Object: &autoscalingv2.ObjectMetricSource{
|
|
Target: autoscalingv2.CrossVersionObjectReference{
|
|
APIVersion: "extensions/v1beta1",
|
|
Kind: "Deployment",
|
|
Name: "some-deployment",
|
|
},
|
|
MetricName: "qps",
|
|
TargetValue: resource.MustParse("20.0"),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{20050},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestToleranceCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 4,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetValue: resource.NewMilliQuantity(8666, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestTolerancePerPodCMExternal(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 4,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: autoscalingv2.ExternalMetricSourceType,
|
|
External: &autoscalingv2.ExternalMetricSource{
|
|
MetricSelector: &metav1.LabelSelector{},
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.NewMilliQuantity(2200, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
reportedLevels: []uint64{8600},
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestMinReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{10, 95, 10},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "TooFewReplicas",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestMinReplicasDesiredZero(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{0, 0, 0},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "TooFewReplicas",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestZeroReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 3,
|
|
maxReplicas: 5,
|
|
initialReplicas: 0,
|
|
desiredReplicas: 0,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{},
|
|
reportedCPURequests: []resource.Quantity{},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededGetScale"},
|
|
{Type: autoscalingv1.ScalingActive, Status: v1.ConditionFalse, Reason: "ScalingDisabled"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestTooFewReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 3,
|
|
maxReplicas: 5,
|
|
initialReplicas: 2,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{},
|
|
reportedCPURequests: []resource.Quantity{},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededRescale"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestTooManyReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 3,
|
|
maxReplicas: 5,
|
|
initialReplicas: 10,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{},
|
|
reportedCPURequests: []resource.Quantity{},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededRescale"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestMaxReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 90,
|
|
reportedLevels: []uint64{8000, 9500, 1000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "TooManyReplicas",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestSuperfluousMetrics(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 6,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{4000, 9500, 3000, 7000, 3200, 2000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "TooManyReplicas",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestMissingMetrics(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{400, 95},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestEmptyMetrics(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededGetScale"},
|
|
{Type: autoscalingv1.ScalingActive, Status: v1.ConditionFalse, Reason: "FailedGetResourceMetric"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestEmptyCPURequest(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 1,
|
|
desiredReplicas: 1,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{200},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededGetScale"},
|
|
{Type: autoscalingv1.ScalingActive, Status: v1.ConditionFalse, Reason: "FailedGetResourceMetric"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestEventCreated(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 1,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 50,
|
|
reportedLevels: []uint64{200},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.2")},
|
|
verifyEvents: true,
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestEventNotCreated(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 2,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 50,
|
|
reportedLevels: []uint64{200, 200},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.4"), resource.MustParse("0.4")},
|
|
verifyEvents: true,
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestMissingReports(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 2,
|
|
CPUTarget: 50,
|
|
reportedLevels: []uint64{200},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.2")},
|
|
useMetricsAPI: true,
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestUpscaleCap(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 100,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 24,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ScaleUpLimit",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestUpscaleCapGreaterThanMaxReplicas(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 20,
|
|
initialReplicas: 3,
|
|
// desiredReplicas would be 24 without maxReplicas
|
|
desiredReplicas: 20,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.ScalingLimited,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "TooManyReplicas",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestConditionInvalidSelectorMissing(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 100,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{
|
|
Type: autoscalingv1.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "SucceededGetScale",
|
|
},
|
|
{
|
|
Type: autoscalingv1.ScalingActive,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "InvalidSelector",
|
|
},
|
|
},
|
|
}
|
|
|
|
_, _, _, _, testScaleClient := tc.prepareTestClient(t)
|
|
tc.testScaleClient = testScaleClient
|
|
|
|
testScaleClient.PrependReactor("get", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
obj := &autoscalingv1.Scale{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: tc.resource.name,
|
|
},
|
|
Spec: autoscalingv1.ScaleSpec{
|
|
Replicas: tc.initialReplicas,
|
|
},
|
|
Status: autoscalingv1.ScaleStatus{
|
|
Replicas: tc.initialReplicas,
|
|
},
|
|
}
|
|
return true, obj, nil
|
|
})
|
|
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestConditionInvalidSelectorUnparsable(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 100,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{
|
|
Type: autoscalingv1.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "SucceededGetScale",
|
|
},
|
|
{
|
|
Type: autoscalingv1.ScalingActive,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "InvalidSelector",
|
|
},
|
|
},
|
|
}
|
|
|
|
_, _, _, _, testScaleClient := tc.prepareTestClient(t)
|
|
tc.testScaleClient = testScaleClient
|
|
|
|
testScaleClient.PrependReactor("get", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
obj := &autoscalingv1.Scale{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: tc.resource.name,
|
|
},
|
|
Spec: autoscalingv1.ScaleSpec{
|
|
Replicas: tc.initialReplicas,
|
|
},
|
|
Status: autoscalingv1.ScaleStatus{
|
|
Replicas: tc.initialReplicas,
|
|
Selector: "cheddar cheese",
|
|
},
|
|
}
|
|
return true, obj, nil
|
|
})
|
|
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestConditionFailedGetMetrics(t *testing.T) {
|
|
metricsTargets := map[string][]autoscalingv2.MetricSpec{
|
|
"FailedGetResourceMetric": nil,
|
|
"FailedGetPodsMetric": {
|
|
{
|
|
Type: autoscalingv2.PodsMetricSourceType,
|
|
Pods: &autoscalingv2.PodsMetricSource{
|
|
MetricName: "qps",
|
|
TargetAverageValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
"FailedGetObjectMetric": {
|
|
{
|
|
Type: autoscalingv2.ObjectMetricSourceType,
|
|
Object: &autoscalingv2.ObjectMetricSource{
|
|
Target: autoscalingv2.CrossVersionObjectReference{
|
|
APIVersion: "extensions/v1beta1",
|
|
Kind: "Deployment",
|
|
Name: "some-deployment",
|
|
},
|
|
MetricName: "qps",
|
|
TargetValue: resource.MustParse("15.0"),
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
for reason, specs := range metricsTargets {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 100,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
}
|
|
_, testMetricsClient, testCMClient, _, _ := tc.prepareTestClient(t)
|
|
tc.testMetricsClient = testMetricsClient
|
|
tc.testCMClient = testCMClient
|
|
|
|
testMetricsClient.PrependReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
return true, &metricsapi.PodMetricsList{}, fmt.Errorf("something went wrong")
|
|
})
|
|
testCMClient.PrependReactor("get", "*", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
return true, &cmapi.MetricValueList{}, fmt.Errorf("something went wrong")
|
|
})
|
|
|
|
tc.expectedConditions = []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededGetScale"},
|
|
{Type: autoscalingv1.ScalingActive, Status: v1.ConditionFalse, Reason: reason},
|
|
}
|
|
if specs != nil {
|
|
tc.CPUTarget = 0
|
|
} else {
|
|
tc.CPUTarget = 10
|
|
}
|
|
tc.metricsTarget = specs
|
|
tc.runTest(t)
|
|
}
|
|
}
|
|
|
|
func TestConditionInvalidSourceType(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 0,
|
|
metricsTarget: []autoscalingv2.MetricSpec{
|
|
{
|
|
Type: "CheddarCheese",
|
|
},
|
|
},
|
|
reportedLevels: []uint64{20000},
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{
|
|
Type: autoscalingv1.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "SucceededGetScale",
|
|
},
|
|
{
|
|
Type: autoscalingv1.ScalingActive,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "InvalidMetricSourceType",
|
|
},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestConditionFailedGetScale(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 100,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 10,
|
|
reportedLevels: []uint64{100, 200, 300},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{
|
|
Type: autoscalingv1.AbleToScale,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "FailedGetScale",
|
|
},
|
|
},
|
|
}
|
|
|
|
_, _, _, _, testScaleClient := tc.prepareTestClient(t)
|
|
tc.testScaleClient = testScaleClient
|
|
|
|
testScaleClient.PrependReactor("get", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
return true, &autoscalingv1.Scale{}, fmt.Errorf("something went wrong")
|
|
})
|
|
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestConditionFailedUpdateScale(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{150, 150, 150},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "FailedUpdateScale",
|
|
}),
|
|
}
|
|
|
|
_, _, _, _, testScaleClient := tc.prepareTestClient(t)
|
|
tc.testScaleClient = testScaleClient
|
|
|
|
testScaleClient.PrependReactor("update", "replicationcontrollers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
return true, &autoscalingv1.Scale{}, fmt.Errorf("something went wrong")
|
|
})
|
|
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestBackoffUpscale(t *testing.T) {
|
|
time := metav1.Time{Time: time.Now()}
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{150, 150, 150},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
lastScaleTime: &time,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}, autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "BackoffBoth",
|
|
}),
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestBackoffDownscale(t *testing.T) {
|
|
time := metav1.Time{Time: time.Now().Add(-4 * time.Minute)}
|
|
tc := testCase{
|
|
minReplicas: 1,
|
|
maxReplicas: 5,
|
|
initialReplicas: 4,
|
|
desiredReplicas: 4,
|
|
CPUTarget: 100,
|
|
reportedLevels: []uint64{50, 50, 50},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.1"), resource.MustParse("0.1"), resource.MustParse("0.1")},
|
|
useMetricsAPI: true,
|
|
lastScaleTime: &time,
|
|
expectedConditions: statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
}, autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionFalse,
|
|
Reason: "BackoffDownscale",
|
|
}),
|
|
}
|
|
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 TestComputedToleranceAlgImplementation(t *testing.T) {
|
|
|
|
startPods := int32(10)
|
|
// 150 mCPU per pod.
|
|
totalUsedCPUOfAllPods := uint64(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 := testCase{
|
|
minReplicas: 0,
|
|
maxReplicas: 1000,
|
|
initialReplicas: startPods,
|
|
desiredReplicas: finalPods,
|
|
CPUTarget: finalCPUPercentTarget,
|
|
reportedLevels: []uint64{
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
totalUsedCPUOfAllPods / 10,
|
|
},
|
|
reportedCPURequests: []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"),
|
|
},
|
|
useMetricsAPI: true,
|
|
}
|
|
|
|
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.CPUTarget = finalCPUPercentTarget
|
|
tc.initialReplicas = startPods
|
|
tc.desiredReplicas = startPods
|
|
tc.expectedConditions = statusOkWithOverrides(autoscalingv2.HorizontalPodAutoscalerCondition{
|
|
Type: autoscalingv2.AbleToScale,
|
|
Status: v1.ConditionTrue,
|
|
Reason: "ReadyForNewScale",
|
|
})
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleUpRCImmediately(t *testing.T) {
|
|
time := metav1.Time{Time: time.Now()}
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 1,
|
|
desiredReplicas: 2,
|
|
verifyCPUCurrent: false,
|
|
reportedLevels: []uint64{0, 0, 0, 0},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
useMetricsAPI: true,
|
|
lastScaleTime: &time,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededRescale"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestScaleDownRCImmediately(t *testing.T) {
|
|
time := metav1.Time{Time: time.Now()}
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 5,
|
|
initialReplicas: 6,
|
|
desiredReplicas: 5,
|
|
CPUTarget: 50,
|
|
reportedLevels: []uint64{8000, 9500, 1000},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
|
|
useMetricsAPI: true,
|
|
lastScaleTime: &time,
|
|
expectedConditions: []autoscalingv1.HorizontalPodAutoscalerCondition{
|
|
{Type: autoscalingv1.AbleToScale, Status: v1.ConditionTrue, Reason: "SucceededRescale"},
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestAvoidUncessaryUpdates(t *testing.T) {
|
|
tc := testCase{
|
|
minReplicas: 2,
|
|
maxReplicas: 6,
|
|
initialReplicas: 3,
|
|
desiredReplicas: 3,
|
|
CPUTarget: 30,
|
|
CPUCurrent: 40,
|
|
verifyCPUCurrent: true,
|
|
reportedLevels: []uint64{400, 500, 700},
|
|
reportedCPURequests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
reportedPodReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
|
|
useMetricsAPI: true,
|
|
}
|
|
testClient, _, _, _, _ := tc.prepareTestClient(t)
|
|
tc.testClient = testClient
|
|
var savedHPA *autoscalingv1.HorizontalPodAutoscaler
|
|
testClient.PrependReactor("list", "horizontalpodautoscalers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
tc.Lock()
|
|
defer tc.Unlock()
|
|
|
|
if savedHPA != nil {
|
|
// fake out the verification logic and mark that we're done processing
|
|
go func() {
|
|
// wait a tick and then mark that we're finished (otherwise, we have no
|
|
// way to indicate that we're finished, because the function decides not to do anything)
|
|
time.Sleep(1 * time.Second)
|
|
tc.statusUpdated = true
|
|
tc.processed <- "test-hpa"
|
|
}()
|
|
return true, &autoscalingv1.HorizontalPodAutoscalerList{
|
|
Items: []autoscalingv1.HorizontalPodAutoscaler{*savedHPA},
|
|
}, nil
|
|
}
|
|
|
|
// fallthrough
|
|
return false, nil, nil
|
|
})
|
|
testClient.PrependReactor("update", "horizontalpodautoscalers", func(action core.Action) (handled bool, ret runtime.Object, err error) {
|
|
tc.Lock()
|
|
defer tc.Unlock()
|
|
|
|
if savedHPA == nil {
|
|
// save the HPA and return it
|
|
savedHPA = action.(core.UpdateAction).GetObject().(*autoscalingv1.HorizontalPodAutoscaler)
|
|
return true, savedHPA, nil
|
|
}
|
|
|
|
assert.Fail(t, "should not have attempted to update the HPA when nothing changed")
|
|
// mark that we've processed this HPA
|
|
tc.processed <- ""
|
|
return true, nil, fmt.Errorf("unexpected call")
|
|
})
|
|
|
|
controller, informerFactory := tc.setupController(t)
|
|
|
|
// fake an initial processing loop to populate savedHPA
|
|
initialHPAs, err := testClient.Autoscaling().HorizontalPodAutoscalers("test-namespace").List(metav1.ListOptions{})
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
if err := controller.reconcileAutoscaler(&initialHPAs.Items[0]); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
|
|
// actually run the test
|
|
tc.runTestWithController(t, controller, informerFactory)
|
|
}
|
|
|
|
func TestConvertDesiredReplicasWithRules(t *testing.T) {
|
|
conversionTestCases := []struct {
|
|
currentReplicas int32
|
|
desiredReplicas int32
|
|
hpaMinReplicas int32
|
|
hpaMaxReplicas int32
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expectedConvertedDesiredReplicas int32
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|
expectedCondition string
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|
annotation string
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|
}{
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|
{
|
|
currentReplicas: 5,
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|
desiredReplicas: 7,
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hpaMinReplicas: 3,
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hpaMaxReplicas: 8,
|
|
expectedConvertedDesiredReplicas: 7,
|
|
expectedCondition: "DesiredWithinRange",
|
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annotation: "prenormalized desired replicas within range",
|
|
},
|
|
{
|
|
currentReplicas: 3,
|
|
desiredReplicas: 1,
|
|
hpaMinReplicas: 2,
|
|
hpaMaxReplicas: 8,
|
|
expectedConvertedDesiredReplicas: 2,
|
|
expectedCondition: "TooFewReplicas",
|
|
annotation: "prenormalized desired replicas < minReplicas",
|
|
},
|
|
{
|
|
currentReplicas: 1,
|
|
desiredReplicas: 0,
|
|
hpaMinReplicas: 0,
|
|
hpaMaxReplicas: 10,
|
|
expectedConvertedDesiredReplicas: 1,
|
|
expectedCondition: "TooFewReplicas",
|
|
annotation: "1 is minLimit because hpaMinReplicas < 1",
|
|
},
|
|
{
|
|
currentReplicas: 20,
|
|
desiredReplicas: 1000,
|
|
hpaMinReplicas: 1,
|
|
hpaMaxReplicas: 10,
|
|
expectedConvertedDesiredReplicas: 10,
|
|
expectedCondition: "TooManyReplicas",
|
|
annotation: "maxReplicas is the limit because maxReplicas < scaleUpLimit",
|
|
},
|
|
{
|
|
currentReplicas: 3,
|
|
desiredReplicas: 1000,
|
|
hpaMinReplicas: 1,
|
|
hpaMaxReplicas: 2000,
|
|
expectedConvertedDesiredReplicas: calculateScaleUpLimit(3),
|
|
expectedCondition: "ScaleUpLimit",
|
|
annotation: "scaleUpLimit is the limit because scaleUpLimit < maxReplicas",
|
|
},
|
|
}
|
|
|
|
for _, ctc := range conversionTestCases {
|
|
actualConvertedDesiredReplicas, actualCondition, _ := convertDesiredReplicasWithRules(
|
|
ctc.currentReplicas, ctc.desiredReplicas, ctc.hpaMinReplicas, ctc.hpaMaxReplicas,
|
|
)
|
|
|
|
assert.Equal(t, ctc.expectedConvertedDesiredReplicas, actualConvertedDesiredReplicas, ctc.annotation)
|
|
assert.Equal(t, ctc.expectedCondition, actualCondition, ctc.annotation)
|
|
}
|
|
}
|
|
|
|
// TODO: add more tests
|