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introduce tests to check whether workqueue metrics exist
Signed-off-by: chaosi-zju <chaosi@zju.edu.cn>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| /* | ||
| Copyright 2023 The Karmada Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package e2e | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/onsi/ginkgo/v2" | ||
| "github.com/onsi/gomega" | ||
| "github.com/prometheus/common/model" | ||
| "k8s.io/component-base/metrics/testutil" | ||
|
|
||
| testhelper "github.com/karmada-io/karmada/test/helper" | ||
| ) | ||
|
|
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| var _ = ginkgo.Describe("metrics testing", func() { | ||
| var grabber *testhelper.Grabber | ||
|
|
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| const workqueueQueueDuration = "workqueue_queue_duration_seconds_sum" | ||
|
|
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| ginkgo.BeforeEach(func() { | ||
| var err error | ||
| grabber, err = testhelper.NewMetricsGrabber(context.TODO(), hostKubeClient) | ||
| gomega.Expect(err).ShouldNot(gomega.HaveOccurred()) | ||
| }) | ||
|
|
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| ginkgo.Context("workqueue metrics testing", func() { | ||
|
|
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| ginkgo.It("verify whether workqueue metrics exist", func() { | ||
| var metrics *testutil.Metrics | ||
| var workqueueQueueDurationMetrics model.Samples | ||
|
|
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| ginkgo.By("1. grab metrics from karmada controller", func() { | ||
| // the output format of `metrics` is like: | ||
| // [{ | ||
| // "metric": { | ||
| // "__name__": "workqueue_queue_duration_seconds_sum", | ||
| // "controller": "work-status-controller", | ||
| // "name": "work-status-controller" | ||
| // }, | ||
| // "value": [0, "0.12403110800000001"] | ||
| //}] | ||
| var err error | ||
| metrics, err = grabber.GrabMetricsFromKarmadaControllerManager(context.TODO()) | ||
| gomega.Expect(err).ShouldNot(gomega.HaveOccurred()) | ||
| }) | ||
|
|
||
| ginkgo.By("2. verify whether workqueue metrics exist", func() { | ||
| workqueueQueueDurationMetrics = (*metrics)[workqueueQueueDuration] | ||
| gomega.Expect(workqueueQueueDurationMetrics.Len()).Should(gomega.BeNumerically(">", 0)) | ||
| }) | ||
|
|
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| ginkgo.By("3. verify the value of work-status-controller metric greater than 0", func() { | ||
| workStatusMetric := testhelper.GetMetricByName(workqueueQueueDurationMetrics, "work-status-controller") | ||
| gomega.Expect(workStatusMetric).ShouldNot(gomega.BeNil()) | ||
| gomega.Expect(workStatusMetric.Value).Should(gomega.BeNumerically(">", 0)) | ||
| }) | ||
| }) | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| /* | ||
| Copyright 2023 The Karmada Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package helper | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "regexp" | ||
| "time" | ||
|
|
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| "github.com/prometheus/common/model" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/util/wait" | ||
| clientset "k8s.io/client-go/kubernetes" | ||
| "k8s.io/component-base/metrics/testutil" | ||
| "k8s.io/klog/v2" | ||
| ) | ||
|
|
||
| const ( | ||
| karmadaNamespace = "karmada-system" | ||
| karmadaControllerManagerDeploy = "karmada-controller-manager" | ||
| karmadaControllerManagerPort = 8080 | ||
| karmadaControllerManagerLeaderMetric = "leader_election_master_status" | ||
| ) | ||
|
|
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| type Grabber struct { | ||
| hostKubeClient clientset.Interface | ||
| controllerManagerPods []string | ||
| } | ||
|
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| func NewMetricsGrabber(ctx context.Context, c clientset.Interface) (*Grabber, error) { | ||
| grabber := Grabber{hostKubeClient: c} | ||
| regKarmadaControllerManager := regexp.MustCompile(karmadaControllerManagerDeploy + "-.*") | ||
|
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| podList, err := c.CoreV1().Pods(karmadaNamespace).List(ctx, metav1.ListOptions{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(podList.Items) < 1 { | ||
| klog.Warningf("Can't find any pods in namespace %s to grab metrics from", karmadaNamespace) | ||
| } | ||
| for _, pod := range podList.Items { | ||
| if regKarmadaControllerManager.MatchString(pod.Name) { | ||
| grabber.controllerManagerPods = append(grabber.controllerManagerPods, pod.Name) | ||
| } | ||
| } | ||
| return &grabber, nil | ||
| } | ||
|
|
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| // GrabMetricsFromKarmadaControllerManager fetch metrics from the leader of karmada controller manager | ||
| func (g *Grabber) GrabMetricsFromKarmadaControllerManager(ctx context.Context) (*testutil.Metrics, error) { | ||
| var output string | ||
| var lastMetricsFetchErr error | ||
|
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| var result *testutil.Metrics | ||
| // judge which pod is the leader of karmada controller manager | ||
| for _, podName := range g.controllerManagerPods { | ||
| if metricsWaitErr := wait.PollUntilContextTimeout(ctx, time.Second, 10*time.Second, true, func(ctx context.Context) (bool, error) { | ||
| output, lastMetricsFetchErr = GetMetricsFromPod(ctx, g.hostKubeClient, podName, karmadaNamespace, karmadaControllerManagerPort) | ||
| return lastMetricsFetchErr == nil, nil | ||
| }); metricsWaitErr != nil { | ||
| klog.Errorf("error waiting for %s to expose metrics: %v; %v", podName, metricsWaitErr, lastMetricsFetchErr) | ||
| continue | ||
| } | ||
|
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| podMetrics := testutil.Metrics{} | ||
| metricsParseErr := testutil.ParseMetrics(output, &podMetrics) | ||
| if metricsParseErr != nil { | ||
| klog.Errorf("failed to parse metrics for %s: %v", podName, metricsParseErr) | ||
| continue | ||
| } | ||
|
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| if !isKarmadaControllerManagerLeader(podMetrics[karmadaControllerManagerLeaderMetric]) { | ||
| klog.Infof("skip fetch %s since it is not the leader pod", podName) | ||
| continue | ||
| } | ||
|
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| result = &podMetrics | ||
| break | ||
| } | ||
|
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| if result == nil { | ||
| return nil, fmt.Errorf("failed to fetch metrics from the leader of karmada controller manager") | ||
| } | ||
| return result, nil | ||
| } | ||
|
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| // GetMetricsFromPod retrieves metrics data. | ||
| func GetMetricsFromPod(ctx context.Context, client clientset.Interface, podName string, namespace string, port int) (string, error) { | ||
| rawOutput, err := client.CoreV1().RESTClient().Get(). | ||
| Namespace(namespace). | ||
| Resource("pods"). | ||
| SubResource("proxy"). | ||
| Name(fmt.Sprintf("%s:%d", podName, port)). | ||
| Suffix("metrics"). | ||
| Do(ctx).Raw() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return string(rawOutput), nil | ||
| } | ||
|
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| func isKarmadaControllerManagerLeader(samples model.Samples) bool { | ||
| for _, sample := range samples { | ||
| if sample.Metric["name"] == karmadaControllerManagerDeploy && sample.Value > 0 { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
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| func GetMetricByName(samples model.Samples, name string) *model.Sample { | ||
| for _, sample := range samples { | ||
| if sample.Metric["name"] == model.LabelValue(name) { | ||
| return sample | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
