321 lines
9.0 KiB
Go
321 lines
9.0 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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_ "k8s.io/kubernetes/pkg/apimachinery/registered"
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"k8s.io/kubernetes/pkg/client/testing/core"
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"k8s.io/kubernetes/pkg/client/testing/fake"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"k8s.io/kubernetes/pkg/runtime"
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heapster "k8s.io/heapster/api/v1/types"
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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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replicas int
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desiredValue float64
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desiredError error
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targetResource string
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targetTimestamp int
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reportedMetricsPoints [][]metricPoint
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namespace string
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selector map[string]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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selector := map[string]string{"name": podNamePrefix}
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tc.selector = selector
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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 := &api.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 := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: podName,
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Namespace: namespace,
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Labels: selector,
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Resources: api.ResourceRequirements{
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Requests: api.ResourceList{
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api.ResourceCPU: resource.MustParse("10"),
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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: api.PodStatus{
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Phase: api.PodRunning,
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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 client.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, reportedMetricPoint.level, 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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return fakeClient
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}
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func (tc *testCase) verifyResults(t *testing.T, val *float64, timestamp time.Time, err error) {
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assert.Equal(t, tc.desiredError, err)
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if tc.desiredError != nil {
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return
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}
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assert.NotNil(t, val)
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assert.True(t, tc.desiredValue-0.001 < *val)
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assert.True(t, tc.desiredValue+0.001 > *val)
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targetTimestamp := fixedTimestamp.Add(time.Duration(tc.targetTimestamp) * time.Minute)
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assert.Equal(t, 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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if tc.targetResource == "cpu-usage" {
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val, _, timestamp, err := metricsClient.GetCpuConsumptionAndRequestInMillis(tc.namespace, tc.selector)
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fval := float64(val)
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tc.verifyResults(t, &fval, timestamp, err)
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} else {
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val, timestamp, err := metricsClient.GetCustomMetric(tc.targetResource, tc.namespace, tc.selector)
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tc.verifyResults(t, val, 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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desiredValue: 5000,
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targetResource: "cpu-usage",
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targetTimestamp: 1,
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reportedMetricsPoints: [][]metricPoint{{{5000, 1}}, {{5000, 1}}, {{5000, 1}}},
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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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desiredValue: 13.33333,
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targetResource: "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 TestCPUSumEqualZero(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredValue: 0,
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targetResource: "cpu-usage",
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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 TestQpsSumEqualZero(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredValue: 0,
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targetResource: "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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desiredValue: 5000,
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targetResource: "cpu-usage",
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targetTimestamp: 10,
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reportedMetricsPoints: [][]metricPoint{
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{{0, 3}, {0, 6}, {5, 4}, {9000, 10}},
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{{5000, 2}, {10, 5}, {66, 1}, {0, 10}},
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{{5000, 3}, {80, 5}, {6000, 10}},
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{{5000, 3}, {40, 3}, {0, 9}, {200, 2}, {8000, 10}},
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{{5000, 2}, {20, 2}, {2000, 10}}},
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}
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tc.runTest(t)
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}
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func TestCPUResultIsFloat(t *testing.T) {
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tc := testCase{
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replicas: 6,
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desiredValue: 4783,
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targetResource: "cpu-usage",
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targetTimestamp: 4,
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reportedMetricsPoints: [][]metricPoint{{{4000, 4}}, {{9500, 4}}, {{3000, 4}}, {{7000, 4}}, {{3200, 4}}, {{2000, 4}}},
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}
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tc.runTest(t)
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}
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func TestCPUSamplesWithRandomTimestamps(t *testing.T) {
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tc := testCase{
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replicas: 3,
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desiredValue: 3000,
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targetResource: "cpu-usage",
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targetTimestamp: 3,
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reportedMetricsPoints: [][]metricPoint{
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{{1, 1}, {3000, 5}, {2, 2}},
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{{2, 2}, {1, 1}, {3000, 3}},
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{{3000, 4}, {1, 1}, {2, 2}}},
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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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targetResource: "cpu-usage",
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desiredError: fmt.Errorf("metrics obtained for 1/3 of pods"),
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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 TestQpsMissingMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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targetResource: "qps",
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desiredError: fmt.Errorf("metrics obtained for 1/3 of pods"),
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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 TestCPUSuperfluousMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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targetResource: "cpu-usage",
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desiredError: fmt.Errorf("metrics obtained for 6/3 of pods"),
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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 TestQpsSuperfluousMetrics(t *testing.T) {
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tc := testCase{
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replicas: 3,
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targetResource: "qps",
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desiredError: fmt.Errorf("metrics obtained for 6/3 of pods"),
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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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targetResource: "cpu-usage",
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desiredError: fmt.Errorf("metrics obtained for 0/3 of pods"),
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reportedMetricsPoints: [][]metricPoint{},
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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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targetResource: "cpu-usage",
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desiredError: fmt.Errorf("some pods do not have request for cpu"),
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reportedMetricsPoints: [][]metricPoint{},
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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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targetResource: "cpu-usage",
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desiredError: fmt.Errorf("metrics obtained for 2/3 of pods"),
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reportedMetricsPoints: [][]metricPoint{{}, {{100, 1}}, {{400, 2}, {300, 3}}},
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}
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tc.runTest(t)
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}
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// TODO: add proper tests for request
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