mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
d6fe1e8764
This commit switches over the HPA controller to use the custom metrics API. It also converts the HPA controller to use the generated client in k8s.io/metrics for the resource metrics API. In order to enable support, you must enable `--horizontal-pod-autoscaler-use-rest-clients` on the controller-manager, which will switch the HPA controller's MetricsClient implementation over to use the standard rest clients for both custom metrics and resource metrics. This requires that at the least resource metrics API is registered with kube-aggregator, and that the controller manager is pointed at kube-aggregator. For this to work, Heapster must be serving the new-style API server (`--api-server=true`).
367 lines
11 KiB
Go
367 lines
11 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 metrics
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import (
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"encoding/json"
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"fmt"
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"io"
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"testing"
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"time"
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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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restclient "k8s.io/client-go/rest"
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core "k8s.io/client-go/testing"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset/fake"
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heapster "k8s.io/heapster/metrics/api/v1/types"
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metricsapi "k8s.io/heapster/metrics/apis/metrics/v1alpha1"
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"github.com/stretchr/testify/assert"
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)
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var fixedTimestamp = time.Date(2015, time.November, 10, 12, 30, 0, 0, time.UTC)
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func (w fakeResponseWrapper) DoRaw() ([]byte, error) {
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return w.raw, nil
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}
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func (w fakeResponseWrapper) Stream() (io.ReadCloser, error) {
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return nil, nil
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}
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func newFakeResponseWrapper(raw []byte) fakeResponseWrapper {
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return fakeResponseWrapper{raw: raw}
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}
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type fakeResponseWrapper struct {
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raw []byte
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}
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// timestamp is used for establishing order on metricPoints
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type metricPoint struct {
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level uint64
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timestamp int
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}
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type testCase struct {
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desiredMetricValues PodMetricsInfo
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desiredError error
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replicas int
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targetTimestamp int
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reportedMetricsPoints [][]metricPoint
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reportedPodMetrics [][]int64
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namespace string
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selector labels.Selector
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resourceName v1.ResourceName
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metricName string
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}
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func (tc *testCase) prepareTestClient(t *testing.T) *fake.Clientset {
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namespace := "test-namespace"
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tc.namespace = namespace
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podNamePrefix := "test-pod"
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podLabels := map[string]string{"name": podNamePrefix}
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tc.selector = labels.SelectorFromSet(podLabels)
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// it's a resource test if we have a resource name
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isResource := len(tc.resourceName) > 0
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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 < tc.replicas; i++ {
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podName := fmt.Sprintf("%s-%d", podNamePrefix, i)
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pod := buildPod(namespace, podName, podLabels, v1.PodRunning, "1024")
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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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if isResource {
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fakeClient.AddProxyReactor("services", func(action core.Action) (handled bool, ret restclient.ResponseWrapper, err error) {
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metrics := metricsapi.PodMetricsList{}
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for i, containers := range tc.reportedPodMetrics {
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metric := metricsapi.PodMetrics{
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ObjectMeta: v1.ObjectMeta{
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Name: fmt.Sprintf("%s-%d", podNamePrefix, i),
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Namespace: namespace,
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},
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Timestamp: unversioned.Time{Time: fixedTimestamp.Add(time.Duration(tc.targetTimestamp) * time.Minute)},
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Containers: []metricsapi.ContainerMetrics{},
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}
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for j, cpu := range containers {
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cm := metricsapi.ContainerMetrics{
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Name: fmt.Sprintf("%s-%d-container-%d", podNamePrefix, i, j),
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Usage: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(
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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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metric.Containers = append(metric.Containers, cm)
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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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return true, newFakeResponseWrapper(heapsterRawMemResponse), nil
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})
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} else {
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fakeClient.AddProxyReactor("services", func(action core.Action) (handled bool, ret restclient.ResponseWrapper, err error) {
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metrics := heapster.MetricResultList{}
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var latestTimestamp time.Time
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for _, reportedMetricPoints := range tc.reportedMetricsPoints {
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var heapsterMetricPoints []heapster.MetricPoint
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for _, reportedMetricPoint := range reportedMetricPoints {
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timestamp := fixedTimestamp.Add(time.Duration(reportedMetricPoint.timestamp) * time.Minute)
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if latestTimestamp.Before(timestamp) {
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latestTimestamp = timestamp
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}
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heapsterMetricPoint := heapster.MetricPoint{Timestamp: timestamp, Value: reportedMetricPoint.level, FloatValue: nil}
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heapsterMetricPoints = append(heapsterMetricPoints, heapsterMetricPoint)
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}
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metric := heapster.MetricResult{
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Metrics: heapsterMetricPoints,
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LatestTimestamp: latestTimestamp,
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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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return true, newFakeResponseWrapper(heapsterRawMemResponse), nil
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})
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}
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return fakeClient
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}
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func buildPod(namespace, podName string, podLabels map[string]string, phase v1.PodPhase, request string) v1.Pod {
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return v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: namespace,
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Labels: podLabels,
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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: resource.MustParse(request),
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},
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},
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},
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},
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},
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Status: v1.PodStatus{
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Phase: phase,
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Conditions: []v1.PodCondition{
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{
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Type: v1.PodReady,
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Status: v1.ConditionTrue,
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},
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},
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},
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}
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}
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func (tc *testCase) verifyResults(t *testing.T, metrics PodMetricsInfo, timestamp time.Time, err error) {
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if tc.desiredError != nil {
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assert.Error(t, err, "there should be an error retrieving the metrics")
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assert.Contains(t, fmt.Sprintf("%v", err), fmt.Sprintf("%v", tc.desiredError), "the error message should be eas expected")
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return
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}
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assert.NoError(t, err, "there should be no error retrieving the metrics")
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assert.NotNil(t, metrics, "there should be metrics returned")
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assert.Equal(t, tc.desiredMetricValues, metrics, "the metrics values should be as expected")
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targetTimestamp := fixedTimestamp.Add(time.Duration(tc.targetTimestamp) * time.Minute)
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assert.True(t, targetTimestamp.Equal(timestamp), fmt.Sprintf("the timestamp should be as expected (%s) but was %s", targetTimestamp, timestamp))
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}
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func (tc *testCase) runTest(t *testing.T) {
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testClient := tc.prepareTestClient(t)
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metricsClient := NewHeapsterMetricsClient(testClient, DefaultHeapsterNamespace, DefaultHeapsterScheme, DefaultHeapsterService, DefaultHeapsterPort)
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isResource := len(tc.resourceName) > 0
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if isResource {
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info, timestamp, err := metricsClient.GetResourceMetric(tc.resourceName, tc.namespace, tc.selector)
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tc.verifyResults(t, info, timestamp, err)
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} else {
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info, timestamp, err := metricsClient.GetRawMetric(tc.metricName, tc.namespace, tc.selector)
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tc.verifyResults(t, info, timestamp, err)
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}
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}
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func TestCPU(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 5000, "test-pod-1": 5000, "test-pod-2": 5000,
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},
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resourceName: v1.ResourceCPU,
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targetTimestamp: 1,
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reportedPodMetrics: [][]int64{{5000}, {5000}, {5000}},
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}
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tc.runTest(t)
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}
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func TestQPS(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 10000, "test-pod-1": 20000, "test-pod-2": 10000,
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},
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metricName: "qps",
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targetTimestamp: 1,
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reportedMetricsPoints: [][]metricPoint{{{10, 1}}, {{20, 1}}, {{10, 1}}},
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}
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tc.runTest(t)
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}
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func TestQpsSumEqualZero(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 0, "test-pod-1": 0, "test-pod-2": 0,
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},
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metricName: "qps",
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targetTimestamp: 0,
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reportedMetricsPoints: [][]metricPoint{{{0, 0}}, {{0, 0}}, {{0, 0}}},
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}
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tc.runTest(t)
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}
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func TestCPUMoreMetrics(t *testing.T) {
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tc := testCase{
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replicas: 5,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 5000, "test-pod-1": 5000, "test-pod-2": 5000,
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"test-pod-3": 5000, "test-pod-4": 5000,
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},
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resourceName: v1.ResourceCPU,
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targetTimestamp: 10,
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reportedPodMetrics: [][]int64{{1000, 2000, 2000}, {5000}, {1000, 1000, 1000, 2000}, {4000, 1000}, {5000}},
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}
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tc.runTest(t)
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}
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func TestCPUMissingMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 4000,
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},
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resourceName: v1.ResourceCPU,
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reportedPodMetrics: [][]int64{{4000}},
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}
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tc.runTest(t)
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}
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func TestQpsMissingMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredError: fmt.Errorf("requested metrics for 3 pods, got metrics for 1"),
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metricName: "qps",
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targetTimestamp: 1,
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reportedMetricsPoints: [][]metricPoint{{{4000, 4}}},
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}
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tc.runTest(t)
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}
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func TestQpsSuperfluousMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredError: fmt.Errorf("requested metrics for 3 pods, got metrics for 6"),
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metricName: "qps",
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reportedMetricsPoints: [][]metricPoint{{{1000, 1}}, {{2000, 4}}, {{2000, 1}}, {{4000, 5}}, {{2000, 1}}, {{4000, 4}}},
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}
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tc.runTest(t)
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}
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func TestCPUEmptyMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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resourceName: v1.ResourceCPU,
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desiredError: fmt.Errorf("no metrics returned from heapster"),
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reportedMetricsPoints: [][]metricPoint{},
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reportedPodMetrics: [][]int64{},
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}
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tc.runTest(t)
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}
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func TestQpsEmptyEntries(t *testing.T) {
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tc := testCase{
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replicas: 3,
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metricName: "qps",
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 4000000, "test-pod-2": 2000000,
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},
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targetTimestamp: 4,
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reportedMetricsPoints: [][]metricPoint{{{4000, 4}}, {}, {{2000, 4}}},
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}
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tc.runTest(t)
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}
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func TestCPUZeroReplicas(t *testing.T) {
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tc := testCase{
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replicas: 0,
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resourceName: v1.ResourceCPU,
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desiredError: fmt.Errorf("no metrics returned from heapster"),
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reportedPodMetrics: [][]int64{},
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}
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tc.runTest(t)
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}
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func TestCPUEmptyMetricsForOnePod(t *testing.T) {
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tc := testCase{
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replicas: 3,
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resourceName: v1.ResourceCPU,
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desiredMetricValues: PodMetricsInfo{
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"test-pod-0": 100, "test-pod-1": 700,
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},
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reportedPodMetrics: [][]int64{{100}, {300, 400}, {}},
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}
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tc.runTest(t)
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}
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func testCollapseTimeSamples(t *testing.T) {
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now := time.Now()
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metrics := heapster.MetricResult{
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Metrics: []heapster.MetricPoint{
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{Timestamp: now, Value: 50, FloatValue: nil},
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{Timestamp: now.Add(-15 * time.Second), Value: 100, FloatValue: nil},
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{Timestamp: now.Add(-60 * time.Second), Value: 100000, FloatValue: nil}},
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LatestTimestamp: now,
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}
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val, timestamp, hadMetrics := collapseTimeSamples(metrics, time.Minute)
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assert.True(t, hadMetrics, "should report that it received a populated list of metrics")
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assert.InEpsilon(t, float64(75), val, 0.1, "collapsed sample value should be as expected")
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assert.True(t, timestamp.Equal(now), "timestamp should be the current time (the newest)")
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}
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