test: get pod network info if dns validation fails (#2778)

test/e2e/kubernetes/kubernetes_test.go

@@ -1018,16 +1018,26 @@ var _ = Describe("Azure Container Cluster using the Kubernetes Orchestrator", fu
 
 		It("should have functional container networking DNS", func() {
 			By("Ensuring that we have functional DNS resolution from a linux container")
-			j, err := job.CreateJobFromFileDeleteIfExists(filepath.Join(WorkloadDir, "validate-dns-linux.yaml"), "validate-dns-linux", "default", 3*time.Second, cfg.Timeout)
+			validateDNSLinuxName := "validate-dns-linux"
+			validateDNSLinuxNamespace := "default"
+			j, err := job.CreateJobFromFileDeleteIfExists(filepath.Join(WorkloadDir, fmt.Sprintf("%s.yaml", validateDNSLinuxName)), validateDNSLinuxName, validateDNSLinuxNamespace, 3*time.Second, cfg.Timeout)
 			Expect(err).NotTo(HaveOccurred())
 			ready, err := j.WaitOnSucceeded(sleepBetweenRetriesWhenWaitingForPodReady, validateDNSTimeout)
 			if err != nil {
-				pod.PrintPodsLogs("validate-dns-linux", "default", 5*time.Second, 1*time.Minute)
-			}
-			delErr := j.Delete(util.DefaultDeleteRetries)
-			if delErr != nil {
-				fmt.Printf("could not delete job %s\n", j.Metadata.Name)
-				fmt.Println(delErr)
+				pod.PrintPodsLogs(validateDNSLinuxName, validateDNSLinuxNamespace, 5*time.Second, 1*time.Minute)
+				pods, err := pod.GetAllByPrefixWithRetry(validateDNSLinuxName, validateDNSLinuxNamespace, 3*time.Second, cfg.Timeout)
+				Expect(err).NotTo(HaveOccurred())
+				for _, p := range pods {
+					out, err := p.Exec("--", "cat", "/etc/resolv.conf")
+					log.Printf("%s\n", string(out))
+					Expect(err).NotTo(HaveOccurred())
+					out, err = p.Exec("--", "ifconfig")
+					log.Printf("%s\n", string(out))
+					Expect(err).NotTo(HaveOccurred())
+					out, err = p.Exec("--", "nc", "-vz", eng.ExpandedDefinition.Properties.OrchestratorProfile.KubernetesConfig.DNSServiceIP, "53")
+					log.Printf("%s\n", string(out))
+					Expect(err).NotTo(HaveOccurred())
+				}
 			}
 			Expect(err).NotTo(HaveOccurred())
 			Expect(ready).To(Equal(true))
@@ -1042,11 +1052,6 @@ var _ = Describe("Azure Container Cluster using the Kubernetes Orchestrator", fu
 				if err != nil {
 					pod.PrintPodsLogs("validate-dns-windows", "default", 5*time.Second, 1*time.Minute)
 				}
-				delErr = j.Delete(util.DefaultDeleteRetries)
-				if delErr != nil {
-					fmt.Printf("could not delete job %s\n", j.Metadata.Name)
-					fmt.Println(delErr)
-				}
 				Expect(err).NotTo(HaveOccurred())
 				Expect(ready).To(Equal(true))
 			}

test/e2e/kubernetes/pod/pod.go

@@ -294,7 +294,7 @@ func GetAll(namespace string) (*List, error) {
 }
 
 // GetWithRetry gets a pod, allowing for retries
-func GetWithRetry(podPrefix, namespace string, sleep, timeout time.Duration) (*Pod, error) {
+func GetWithRetry(podName, namespace string, sleep, timeout time.Duration) (*Pod, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
 	ch := make(chan GetResult)
@@ -306,7 +306,7 @@ func GetWithRetry(podPrefix, namespace string, sleep, timeout time.Duration) (*P
 			case <-ctx.Done():
 				return
 			default:
-				ch <- GetAsync(podPrefix, namespace)
+				ch <- GetAsync(podName, namespace)
 				time.Sleep(sleep)
 			}
 		}