290 lines
9.7 KiB
Go
290 lines
9.7 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 e2e
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import (
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"context"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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"time"
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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/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/test/e2e/framework"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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const (
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// graceTime is how long to keep retrying requesting elasticsearch for status information.
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graceTime = 5 * time.Minute
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)
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var _ = framework.KubeDescribe("Cluster level logging using Elasticsearch [Feature:Elasticsearch]", func() {
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f := framework.NewDefaultFramework("es-logging")
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BeforeEach(func() {
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// TODO: For now assume we are only testing cluster logging with Elasticsearch
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// on GCE. Once we are sure that Elasticsearch cluster level logging
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// works for other providers we should widen this scope of this test.
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framework.SkipUnlessProviderIs("gce")
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})
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It("should check that logs from containers are ingested into Elasticsearch", func() {
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err := checkElasticsearchReadiness(f)
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framework.ExpectNoError(err, "Elasticsearch failed to start")
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By("Running synthetic logger")
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createSynthLogger(f, expectedLinesCount)
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defer f.PodClient().Delete(synthLoggerPodName, &v1.DeleteOptions{})
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err = framework.WaitForPodSuccessInNamespace(f.ClientSet, synthLoggerPodName, f.Namespace.Name)
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framework.ExpectNoError(err, fmt.Sprintf("Should've successfully waited for pod %s to succeed", synthLoggerPodName))
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By("Waiting for logs to ingest")
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totalMissing := expectedLinesCount
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for start := time.Now(); time.Since(start) < ingestionTimeout; time.Sleep(ingestionRetryDelay) {
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totalMissing, err = getMissingLinesCountElasticsearch(f, expectedLinesCount)
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if err != nil {
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framework.Logf("Failed to get missing lines count due to %v", err)
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totalMissing = expectedLinesCount
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} else if totalMissing > 0 {
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framework.Logf("Still missing %d lines", totalMissing)
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}
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if totalMissing == 0 {
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break
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}
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}
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if totalMissing > 0 {
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if err := reportLogsFromFluentdPod(f); err != nil {
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framework.Logf("Failed to report logs from fluentd pod due to %v", err)
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}
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}
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Expect(totalMissing).To(Equal(0), "Some log lines are still missing")
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})
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})
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// Ensures that elasticsearch is running and ready to serve requests
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func checkElasticsearchReadiness(f *framework.Framework) error {
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// Check for the existence of the Elasticsearch service.
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By("Checking the Elasticsearch service exists.")
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s := f.ClientSet.Core().Services(api.NamespaceSystem)
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// Make a few attempts to connect. This makes the test robust against
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// being run as the first e2e test just after the e2e cluster has been created.
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var err error
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for start := time.Now(); time.Since(start) < graceTime; time.Sleep(5 * time.Second) {
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if _, err = s.Get("elasticsearch-logging", metav1.GetOptions{}); err == nil {
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break
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}
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framework.Logf("Attempt to check for the existence of the Elasticsearch service failed after %v", time.Since(start))
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}
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Expect(err).NotTo(HaveOccurred())
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// Wait for the Elasticsearch pods to enter the running state.
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By("Checking to make sure the Elasticsearch pods are running")
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label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "elasticsearch-logging"}))
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options := v1.ListOptions{LabelSelector: label.String()}
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pods, err := f.ClientSet.Core().Pods(api.NamespaceSystem).List(options)
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Expect(err).NotTo(HaveOccurred())
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for _, pod := range pods.Items {
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err = framework.WaitForPodRunningInNamespace(f.ClientSet, &pod)
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Expect(err).NotTo(HaveOccurred())
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}
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By("Checking to make sure we are talking to an Elasticsearch service.")
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// Perform a few checks to make sure this looks like an Elasticsearch cluster.
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var statusCode int
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err = nil
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var body []byte
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for start := time.Now(); time.Since(start) < graceTime; time.Sleep(10 * time.Second) {
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proxyRequest, errProxy := framework.GetServicesProxyRequest(f.ClientSet, f.ClientSet.Core().RESTClient().Get())
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if errProxy != nil {
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framework.Logf("After %v failed to get services proxy request: %v", time.Since(start), errProxy)
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continue
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}
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ctx, cancel := context.WithTimeout(context.Background(), framework.SingleCallTimeout)
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defer cancel()
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// Query against the root URL for Elasticsearch.
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response := proxyRequest.Namespace(api.NamespaceSystem).
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Context(ctx).
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Name("elasticsearch-logging").
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Do()
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err = response.Error()
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response.StatusCode(&statusCode)
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if err != nil {
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if ctx.Err() != nil {
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framework.Failf("After %v proxy call to elasticsearch-loigging failed: %v", time.Since(start), err)
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continue
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}
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framework.Logf("After %v proxy call to elasticsearch-loigging failed: %v", time.Since(start), err)
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continue
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}
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if int(statusCode) != 200 {
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framework.Logf("After %v Elasticsearch cluster has a bad status: %v", time.Since(start), statusCode)
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continue
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}
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break
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}
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Expect(err).NotTo(HaveOccurred())
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if int(statusCode) != 200 {
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framework.Failf("Elasticsearch cluster has a bad status: %v", statusCode)
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}
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// Now assume we really are talking to an Elasticsearch instance.
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// Check the cluster health.
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By("Checking health of Elasticsearch service.")
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healthy := false
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for start := time.Now(); time.Since(start) < graceTime; time.Sleep(5 * time.Second) {
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proxyRequest, errProxy := framework.GetServicesProxyRequest(f.ClientSet, f.ClientSet.Core().RESTClient().Get())
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if errProxy != nil {
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framework.Logf("After %v failed to get services proxy request: %v", time.Since(start), errProxy)
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continue
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}
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ctx, cancel := context.WithTimeout(context.Background(), framework.SingleCallTimeout)
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defer cancel()
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body, err = proxyRequest.Namespace(api.NamespaceSystem).
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Context(ctx).
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Name("elasticsearch-logging").
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Suffix("_cluster/health").
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Param("level", "indices").
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DoRaw()
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if err != nil {
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if ctx.Err() != nil {
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framework.Failf("Failed to get cluster health from elasticsearch: %v", err)
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}
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continue
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}
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health := make(map[string]interface{})
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err := json.Unmarshal(body, &health)
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if err != nil {
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framework.Logf("Bad json response from elasticsearch: %v", err)
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continue
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}
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statusIntf, ok := health["status"]
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if !ok {
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framework.Logf("No status field found in cluster health response: %v", health)
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continue
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}
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status := statusIntf.(string)
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if status != "green" && status != "yellow" {
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framework.Logf("Cluster health has bad status: %v", health)
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continue
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}
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if err == nil && ok {
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healthy = true
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break
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}
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}
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if !healthy {
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return fmt.Errorf("After %v elasticsearch cluster is not healthy", graceTime)
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}
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return nil
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}
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func getMissingLinesCountElasticsearch(f *framework.Framework, expectedCount int) (int, error) {
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proxyRequest, errProxy := framework.GetServicesProxyRequest(f.ClientSet, f.ClientSet.Core().RESTClient().Get())
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if errProxy != nil {
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return 0, fmt.Errorf("Failed to get services proxy request: %v", errProxy)
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}
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ctx, cancel := context.WithTimeout(context.Background(), framework.SingleCallTimeout)
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defer cancel()
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// Ask Elasticsearch to return all the log lines that were tagged with the
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// pod name. Ask for ten times as many log lines because duplication is possible.
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body, err := proxyRequest.Namespace(api.NamespaceSystem).
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Context(ctx).
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Name("elasticsearch-logging").
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Suffix("_search").
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// TODO: Change filter to only match records from current test run
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// after fluent-plugin-kubernetes_metadata_filter is enabled
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// and optimize current query
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Param("q", fmt.Sprintf("tag:*%s*", synthLoggerPodName)).
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Param("size", strconv.Itoa(expectedCount*10)).
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DoRaw()
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if err != nil {
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if ctx.Err() != nil {
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framework.Failf("Failed to make proxy call to elasticsearch-logging: %v", err)
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}
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return 0, fmt.Errorf("Failed to make proxy call to elasticsearch-logging: %v", err)
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}
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var response map[string]interface{}
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err = json.Unmarshal(body, &response)
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if err != nil {
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return 0, fmt.Errorf("Failed to unmarshal response: %v", err)
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}
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hits, ok := response["hits"].(map[string]interface{})
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if !ok {
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return 0, fmt.Errorf("response[hits] not of the expected type: %T", response["hits"])
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}
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h, ok := hits["hits"].([]interface{})
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if !ok {
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return 0, fmt.Errorf("Hits not of the expected type: %T", hits["hits"])
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}
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// Initialize data-structure for observing counts.
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counts := make(map[int]int)
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// Iterate over the hits and populate the observed array.
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for _, e := range h {
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l, ok := e.(map[string]interface{})
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if !ok {
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framework.Logf("Element of hit not of expected type: %T", e)
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continue
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}
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source, ok := l["_source"].(map[string]interface{})
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if !ok {
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framework.Logf("_source not of the expected type: %T", l["_source"])
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continue
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}
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msg, ok := source["log"].(string)
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if !ok {
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framework.Logf("Log not of the expected type: %T", source["log"])
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continue
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}
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lineNumber, err := strconv.Atoi(strings.TrimSpace(msg))
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if err != nil {
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framework.Logf("Log line %s is not a number", msg)
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continue
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}
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if lineNumber < 0 || lineNumber >= expectedCount {
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framework.Logf("Number %d is not valid, expected number from range [0, %d)", lineNumber, expectedCount)
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continue
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}
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// Record the observation of a log line
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// Duplicates are possible and fine, fluentd has at-least-once delivery
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counts[lineNumber]++
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}
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return expectedCount - len(counts), nil
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}
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