303 lines
9.3 KiB
Go
303 lines
9.3 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 e2e
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"time"
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influxdb "github.com/influxdata/influxdb/client"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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"k8s.io/kubernetes/test/e2e/framework"
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. "github.com/onsi/ginkgo"
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)
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var _ = framework.KubeDescribe("Monitoring", func() {
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f := framework.NewDefaultFramework("monitoring")
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BeforeEach(func() {
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framework.SkipUnlessProviderIs("gce")
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})
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It("should verify monitoring pods and all cluster nodes are available on influxdb using heapster.", func() {
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testMonitoringUsingHeapsterInfluxdb(f.ClientSet)
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})
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})
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const (
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influxdbService = "monitoring-influxdb"
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influxdbDatabaseName = "k8s"
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podlistQuery = "show tag values from \"cpu/usage\" with key = pod_id"
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nodelistQuery = "show tag values from \"cpu/usage\" with key = hostname"
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sleepBetweenAttempts = 5 * time.Second
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testTimeout = 5 * time.Minute
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)
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var (
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rcLabels = []string{"heapster", "influxGrafana"}
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expectedServices = map[string]bool{
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influxdbService: false,
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"monitoring-grafana": false,
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}
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)
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// Query sends a command to the server and returns the Response
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func Query(c clientset.Interface, query string) (*influxdb.Response, error) {
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ctx, cancel := context.WithTimeout(context.Background(), framework.SingleCallTimeout)
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defer cancel()
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result, err := c.Core().RESTClient().Get().
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Prefix("proxy").
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Namespace("kube-system").
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Resource("services").
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Name(influxdbService+":api").
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Suffix("query").
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Param("q", query).
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Param("db", influxdbDatabaseName).
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Param("epoch", "s").
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Do().
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Raw()
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if err != nil {
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if ctx.Err() != nil {
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framework.Failf("Failed to query influx db: %v", err)
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}
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return nil, err
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}
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var response influxdb.Response
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dec := json.NewDecoder(bytes.NewReader(result))
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dec.UseNumber()
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err = dec.Decode(&response)
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if err != nil {
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return nil, err
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}
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return &response, nil
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}
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func verifyExpectedRcsExistAndGetExpectedPods(c clientset.Interface) ([]string, error) {
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expectedPods := []string{}
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// Iterate over the labels that identify the replication controllers that we
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// want to check. The rcLabels contains the value values for the k8s-app key
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// that identify the replication controllers that we want to check. Using a label
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// rather than an explicit name is preferred because the names will typically have
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// a version suffix e.g. heapster-monitoring-v1 and this will change after a rolling
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// update e.g. to heapster-monitoring-v2. By using a label query we can check for the
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// situation when a heapster-monitoring-v1 and heapster-monitoring-v2 replication controller
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// is running (which would be an error except during a rolling update).
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for _, rcLabel := range rcLabels {
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selector := labels.Set{"k8s-app": rcLabel}.AsSelector()
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options := v1.ListOptions{LabelSelector: selector.String()}
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deploymentList, err := c.Extensions().Deployments(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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rcList, err := c.Core().ReplicationControllers(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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psList, err := c.Apps().StatefulSets(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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if (len(rcList.Items) + len(deploymentList.Items) + len(psList.Items)) != 1 {
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return nil, fmt.Errorf("expected to find one replica for RC or deployment with label %s but got %d",
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rcLabel, len(rcList.Items))
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}
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// Check all the replication controllers.
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for _, rc := range rcList.Items {
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selector := labels.Set(rc.Spec.Selector).AsSelector()
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options := v1.ListOptions{LabelSelector: selector.String()}
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podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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for _, pod := range podList.Items {
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if pod.DeletionTimestamp != nil {
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continue
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}
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expectedPods = append(expectedPods, string(pod.UID))
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}
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}
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// Do the same for all deployments.
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for _, rc := range deploymentList.Items {
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selector := labels.Set(rc.Spec.Selector.MatchLabels).AsSelector()
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options := v1.ListOptions{LabelSelector: selector.String()}
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podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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for _, pod := range podList.Items {
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if pod.DeletionTimestamp != nil {
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continue
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}
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expectedPods = append(expectedPods, string(pod.UID))
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}
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}
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// And for pet sets.
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for _, ps := range psList.Items {
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selector := labels.Set(ps.Spec.Selector.MatchLabels).AsSelector()
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options := v1.ListOptions{LabelSelector: selector.String()}
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podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
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if err != nil {
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return nil, err
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}
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for _, pod := range podList.Items {
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if pod.DeletionTimestamp != nil {
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continue
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}
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expectedPods = append(expectedPods, string(pod.UID))
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}
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}
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}
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return expectedPods, nil
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}
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func expectedServicesExist(c clientset.Interface) error {
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serviceList, err := c.Core().Services(api.NamespaceSystem).List(v1.ListOptions{})
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if err != nil {
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return err
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}
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for _, service := range serviceList.Items {
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if _, ok := expectedServices[service.Name]; ok {
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expectedServices[service.Name] = true
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}
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}
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for service, found := range expectedServices {
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if !found {
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return fmt.Errorf("Service %q not found", service)
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}
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}
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return nil
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}
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func getAllNodesInCluster(c clientset.Interface) ([]string, error) {
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// It should be OK to list unschedulable Nodes here.
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nodeList, err := c.Core().Nodes().List(v1.ListOptions{})
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if err != nil {
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return nil, err
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}
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result := []string{}
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for _, node := range nodeList.Items {
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result = append(result, node.Name)
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}
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return result, nil
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}
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func getInfluxdbData(c clientset.Interface, query string, tag string) (map[string]bool, error) {
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response, err := Query(c, query)
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if err != nil {
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return nil, err
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}
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if len(response.Results) != 1 {
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return nil, fmt.Errorf("expected only one result from Influxdb for query %q. Got %+v", query, response)
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}
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if len(response.Results[0].Series) != 1 {
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return nil, fmt.Errorf("expected exactly one series for query %q.", query)
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}
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if len(response.Results[0].Series[0].Columns) != 2 {
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framework.Failf("Expected two columns for query %q. Found %v", query, response.Results[0].Series[0].Columns)
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}
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result := map[string]bool{}
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for _, value := range response.Results[0].Series[0].Values {
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name := value[1].(string)
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result[name] = true
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}
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return result, nil
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}
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func expectedItemsExist(expectedItems []string, actualItems map[string]bool) bool {
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if len(actualItems) < len(expectedItems) {
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return false
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}
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for _, item := range expectedItems {
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if _, found := actualItems[item]; !found {
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return false
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}
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}
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return true
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}
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func validatePodsAndNodes(c clientset.Interface, expectedPods, expectedNodes []string) bool {
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pods, err := getInfluxdbData(c, podlistQuery, "pod_id")
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if err != nil {
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// We don't fail the test here because the influxdb service might still not be running.
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framework.Logf("failed to query list of pods from influxdb. Query: %q, Err: %v", podlistQuery, err)
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return false
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}
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nodes, err := getInfluxdbData(c, nodelistQuery, "hostname")
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if err != nil {
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framework.Logf("failed to query list of nodes from influxdb. Query: %q, Err: %v", nodelistQuery, err)
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return false
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}
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if !expectedItemsExist(expectedPods, pods) {
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framework.Logf("failed to find all expected Pods.\nExpected: %v\nActual: %v", expectedPods, pods)
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return false
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}
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if !expectedItemsExist(expectedNodes, nodes) {
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framework.Logf("failed to find all expected Nodes.\nExpected: %v\nActual: %v", expectedNodes, nodes)
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return false
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}
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return true
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}
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func testMonitoringUsingHeapsterInfluxdb(c clientset.Interface) {
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// Check if heapster pods and services are up.
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expectedPods, err := verifyExpectedRcsExistAndGetExpectedPods(c)
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framework.ExpectNoError(err)
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framework.ExpectNoError(expectedServicesExist(c))
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// TODO: Wait for all pods and services to be running.
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expectedNodes, err := getAllNodesInCluster(c)
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framework.ExpectNoError(err)
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startTime := time.Now()
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for {
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if validatePodsAndNodes(c, expectedPods, expectedNodes) {
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return
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}
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if time.Since(startTime) >= testTimeout {
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// temporary workaround to help debug issue #12765
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printDebugInfo(c)
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break
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}
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time.Sleep(sleepBetweenAttempts)
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}
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framework.Failf("monitoring using heapster and influxdb test failed")
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}
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func printDebugInfo(c clientset.Interface) {
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set := labels.Set{"k8s-app": "heapster"}
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options := v1.ListOptions{LabelSelector: set.AsSelector().String()}
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podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
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if err != nil {
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framework.Logf("Error while listing pods %v", err)
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return
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}
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for _, pod := range podList.Items {
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framework.Logf("Kubectl output:\n%v",
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framework.RunKubectlOrDie("log", pod.Name, "--namespace=kube-system", "--container=heapster"))
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}
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}
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