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671 lines
22 KiB
Go
671 lines
22 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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"encoding/json"
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"fmt"
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"math"
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"strconv"
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"strings"
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"testing"
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"time"
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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/runtime"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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restclient "k8s.io/client-go/rest"
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core "k8s.io/client-go/testing"
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"k8s.io/client-go/tools/cache"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
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heapster "k8s.io/heapster/metrics/api/v1/types"
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metricsapi "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
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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 legacyReplicaCalcTestCase 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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podReadiness []v1.ConditionStatus
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}
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func (tc *legacyReplicaCalcTestCase) prepareTestClient(t *testing.T) *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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for i := 0; i < int(tc.currentReplicas); i++ {
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podReadiness := v1.ConditionTrue
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if tc.podReadiness != nil {
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podReadiness = tc.podReadiness[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: v1.PodRunning,
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StartTime: &metav1.Time{Time: time.Now().Add(-3 * time.Minute)},
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Conditions: []v1.PodCondition{
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{
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Type: v1.PodReady,
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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 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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fakeClient.AddProxyReactor("services", func(action core.Action) (handled bool, ret restclient.ResponseWrapper, err error) {
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var heapsterRawMemResponse []byte
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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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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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},
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Timestamp: metav1.Time{Time: tc.timestamp},
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Containers: make([]metricsapi.ContainerMetrics, numContainersPerPod),
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}
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for i, m := range resValue {
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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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tc.resource.name: *resource.NewMilliQuantity(m, 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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heapsterRawMemResponse, _ = json.Marshal(&metrics)
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} else {
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// only return the pods that we actually asked for
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proxyAction := action.(core.ProxyGetAction)
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pathParts := strings.Split(proxyAction.GetPath(), "/")
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// pathParts should look like [ api, v1, model, namespaces, $NS, pod-list, $PODS, metrics, $METRIC... ]
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if len(pathParts) < 9 {
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return true, nil, fmt.Errorf("invalid heapster path %q", proxyAction.GetPath())
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}
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podNames := strings.Split(pathParts[7], ",")
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podPresent := make([]bool, len(tc.metric.levels))
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for _, name := range podNames {
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if len(name) <= len(podNamePrefix)+1 {
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return true, nil, fmt.Errorf("unknown pod %q", name)
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}
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num, err := strconv.Atoi(name[len(podNamePrefix)+1:])
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if err != nil {
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return true, nil, fmt.Errorf("unknown pod %q", name)
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}
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podPresent[num] = true
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}
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timestamp := tc.timestamp
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metrics := heapster.MetricResultList{}
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for i, level := range tc.metric.levels {
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if !podPresent[i] {
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continue
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}
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floatVal := float64(tc.metric.levels[i]) / 1000.0
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metric := heapster.MetricResult{
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Metrics: []heapster.MetricPoint{{Timestamp: timestamp, Value: uint64(level), FloatValue: &floatVal}},
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LatestTimestamp: timestamp,
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}
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metrics.Items = append(metrics.Items, metric)
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}
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heapsterRawMemResponse, _ = json.Marshal(&metrics)
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}
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return true, newFakeResponseWrapper(heapsterRawMemResponse), nil
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})
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return fakeClient
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}
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func (tc *legacyReplicaCalcTestCase) runTest(t *testing.T) {
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testClient := tc.prepareTestClient(t)
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metricsClient := metrics.NewHeapsterMetricsClient(testClient, metrics.DefaultHeapsterNamespace, metrics.DefaultHeapsterScheme, metrics.DefaultHeapsterService, metrics.DefaultHeapsterPort)
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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 !cache.WaitForNamedCacheSync("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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} else {
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outReplicas, outUtilization, outTimestamp, err := replicaCalc.GetMetricReplicas(tc.currentReplicas, tc.metric.targetUtilization, tc.metric.name, testNamespace, selector, nil)
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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.metric.expectedUtilization, outUtilization, "utilization should be as expected")
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assert.True(t, tc.timestamp.Equal(outTimestamp), "timestamp should be as expected")
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}
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}
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func TestLegacyReplicaCalcDisjointResourcesMetrics(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 1,
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expectedError: fmt.Errorf("no metrics returned matched known pods"),
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0")},
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levels: makePodMetricLevels(100),
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podNames: []string{"an-older-pod-name"},
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targetUtilization: 100,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUp(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 5,
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(300, 500, 700),
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targetUtilization: 30,
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expectedUtilization: 50,
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expectedValue: numContainersPerPod * 500,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpUnreadyLessScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 4,
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podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionTrue},
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(300, 500, 700),
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targetUtilization: 30,
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expectedUtilization: 60,
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expectedValue: numContainersPerPod * 600,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpUnreadyNoScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 3,
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podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(400, 500, 700),
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targetUtilization: 30,
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expectedUtilization: 40,
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expectedValue: numContainersPerPod * 400,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpCM(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 4,
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metric: &metricInfo{
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name: "qps",
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levels: []int64{20000, 10000, 30000},
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targetUtilization: 15000,
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expectedUtilization: 20000,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpCMUnreadyNoLessScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 6,
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podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse},
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metric: &metricInfo{
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name: "qps",
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levels: []int64{50000, 10000, 30000},
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targetUtilization: 15000,
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expectedUtilization: 30000,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleUpCMUnreadyScale(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 7,
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podReadiness: []v1.ConditionStatus{v1.ConditionFalse, v1.ConditionTrue, v1.ConditionFalse},
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metric: &metricInfo{
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name: "qps",
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levels: []int64{50000, 15000, 30000},
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targetUtilization: 15000,
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expectedUtilization: 31666,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleDown(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 5,
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expectedReplicas: 3,
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(100, 300, 500, 250, 250),
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targetUtilization: 50,
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expectedUtilization: 28,
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expectedValue: numContainersPerPod * 280,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleDownCM(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 5,
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expectedReplicas: 3,
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metric: &metricInfo{
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name: "qps",
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levels: []int64{12000, 12000, 12000, 12000, 12000},
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targetUtilization: 20000,
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expectedUtilization: 12000,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcScaleDownIgnoresUnreadyPods(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 5,
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expectedReplicas: 2,
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podReadiness: []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionTrue, v1.ConditionTrue, v1.ConditionFalse, v1.ConditionFalse},
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(100, 300, 500, 250, 250),
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targetUtilization: 50,
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expectedUtilization: 30,
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expectedValue: numContainersPerPod * 300,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcTolerance(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 3,
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("0.9"), resource.MustParse("1.0"), resource.MustParse("1.1")},
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levels: makePodMetricLevels(1010, 1030, 1020),
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targetUtilization: 100,
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expectedUtilization: 102,
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expectedValue: numContainersPerPod * 1020,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcToleranceCM(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 3,
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expectedReplicas: 3,
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metric: &metricInfo{
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name: "qps",
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levels: []int64{20000, 21000, 21000},
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targetUtilization: 20000,
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expectedUtilization: 20666,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcSuperfluousMetrics(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 4,
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expectedReplicas: 24,
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(4000, 9500, 3000, 7000, 3200, 2000),
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targetUtilization: 100,
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expectedUtilization: 587,
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expectedValue: numContainersPerPod * 5875,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcMissingMetrics(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 4,
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expectedReplicas: 3,
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(400, 95),
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targetUtilization: 100,
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expectedUtilization: 24,
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expectedValue: 495, // numContainersPerPod * 247, for sufficiently large values of 247
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcEmptyMetrics(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 4,
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expectedError: fmt.Errorf("unable to get metrics for resource cpu: no metrics returned from heapster"),
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resource: &resourceInfo{
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name: v1.ResourceCPU,
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requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0"), resource.MustParse("1.0")},
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levels: makePodMetricLevels(),
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targetUtilization: 100,
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},
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}
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tc.runTest(t)
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}
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func TestLegacyReplicaCalcEmptyCPURequest(t *testing.T) {
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tc := legacyReplicaCalcTestCase{
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currentReplicas: 1,
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|
expectedError: fmt.Errorf("missing request for"),
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{},
|
|
levels: makePodMetricLevels(200),
|
|
|
|
targetUtilization: 100,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsNoChangeEq(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: makePodMetricLevels(1000),
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 100,
|
|
expectedValue: numContainersPerPod * 1000,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsNoChangeGt(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: makePodMetricLevels(1900),
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 190,
|
|
expectedValue: numContainersPerPod * 1900,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsNoChangeLt(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
currentReplicas: 2,
|
|
expectedReplicas: 2,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
requests: []resource.Quantity{resource.MustParse("1.0"), resource.MustParse("1.0")},
|
|
levels: makePodMetricLevels(600),
|
|
|
|
targetUtilization: 100,
|
|
expectedUtilization: 60,
|
|
expectedValue: numContainersPerPod * 600,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsUnreadyNoChange(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
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: makePodMetricLevels(100, 450),
|
|
|
|
targetUtilization: 50,
|
|
expectedUtilization: 45,
|
|
expectedValue: numContainersPerPod * 450,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsUnreadyScaleUp(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
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: makePodMetricLevels(100, 2000),
|
|
|
|
targetUtilization: 50,
|
|
expectedUtilization: 200,
|
|
expectedValue: numContainersPerPod * 2000,
|
|
},
|
|
}
|
|
tc.runTest(t)
|
|
}
|
|
|
|
func TestLegacyReplicaCalcMissingMetricsUnreadyScaleDown(t *testing.T) {
|
|
tc := legacyReplicaCalcTestCase{
|
|
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: makePodMetricLevels(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 TestLegacyReplicaCalcComputedToleranceAlgImplementation(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 := legacyReplicaCalcTestCase{
|
|
currentReplicas: startPods,
|
|
expectedReplicas: finalPods,
|
|
resource: &resourceInfo{
|
|
name: v1.ResourceCPU,
|
|
levels: makePodMetricLevels(
|
|
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)
|
|
}
|
|
|
|
// TODO: add more tests
|