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[Fail] [sig-ui] Kubernetes Dashboard [It] should check that the kubernetes-dashboard instance is alive #56

Closed oomichi closed 5 years ago

oomichi commented 5 years ago 
[sig-ui] Kubernetes Dashboard
ESC[90m/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/framework.go:22ESC[0m
  ESC[91mESC[1mshould check that the kubernetes-dashboard instance is alive [It]ESC[0m
  ESC[90m/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/dashboard.go:52ESC[0m

  ESC[91mExpected error:
      <*errors.errorString | 0xc42076b9f0>: {
          s: "error waiting for service kube-system/kubernetes-dashboard to appear: timed out waiting for the condition",
      }
      error waiting for service kube-system/kubernetes-dashboard to appear: timed out waiting for the condition
  not to have occurredESC[0m

  /go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/dashboard.go:55
oomichi commented 5 years ago

shu:

このテストを実行してみて確認したのですが、local-up-cluster.shで起動したクラスタでは、
dashboard がいない、テストの中でもdashboard をデプロイしていない、というだけの様子です。
なので手動でdashboardをデプロイしたら、通りました。
oomichi commented 5 years ago 
$ wget https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/alternative/kubernetes-dashboard.yaml
$ vi kubernetes-dashboard.yaml
--- kubernetes-dashboard.yaml.orig      2018-10-05 17:11:40.145291494 +0000
+++ kubernetes-dashboard.yaml   2018-10-05 17:12:33.762681360 +0000
@@ -136,6 +136,7 @@
   name: kubernetes-dashboard
   namespace: kube-system
 spec:
+  type: NodePort
   ports:
   - port: 80
     targetPort: 9090
$ kubectl create -f kubernetes-dashboard.yaml

テスト → kube-system 配下に dashboard Pod が存在するかというチェックは通るようになった。 しかし、INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)

$ go run hack/e2e.go --provider=skeleton --test --test_args="--ginkgo.focus=the\skubernetes-dashboard\sinstance\sis\salive --master-os-distro=ubuntu --node-os-distro=ubuntu" --check-version-skew=false
...
STEP: Waiting for a default service account to be provisioned in namespace
[It] should check that the kubernetes-dashboard instance is alive
  /go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/dashboard.go:52
STEP: Checking whether the kubernetes-dashboard service exists.
Oct  5 22:00:34.808: INFO: Service kubernetes-dashboard in namespace kube-system found.
STEP: Checking to make sure the kubernetes-dashboard pods are running
STEP: Checking to make sure we get a response from the kubernetes-dashboard.
Oct  5 22:00:36.868: INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)
Oct  5 22:00:38.872: INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)
Oct  5 22:00:40.883: INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)
Oct  5 22:00:42.940: INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)
Oct  5 22:00:44.914: INFO: Request to kubernetes-dashboard failed: the server is currently unable to handle the request (get services https:kubernetes-dashboard:)
...
~ Failure [66.514 seconds]
[sig-ui] Kubernetes Dashboard
/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/framework.go:22
  should check that the kubernetes-dashboard instance is alive [It]
  /go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/dashboard.go:52

  Expected error:
      <*errors.errorString | 0xc420087550>: {
          s: "timed out waiting for the condition",
      }
      timed out waiting for the condition
  not to have occurred

  /go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/ui/dashboard.go:93

テストコード

 73                         // Query against the proxy URL for the kubernetes-dashboard service.
 74                         err := proxyRequest.Namespace(uiNamespace).
 75                                 Context(ctx).
 76                                 Name(utilnet.JoinSchemeNamePort("https", uiServiceName, "")).
 77                                 Timeout(framework.SingleCallTimeout).
 78                                 Do().
 79                                 StatusCode(&status).
 80                                 Error()
 81                         if err != nil {
 82                                 if ctx.Err() != nil {
 83                                         framework.Failf("Request to kubernetes-dashboard failed: %v", err)
 84                                         return true, err
 85                                 }
 86                                 framework.Logf("Request to kubernetes-dashboard failed: %v", err)

86 でエラーになっている。つまり proxyRequest.Namespace で失敗。 err は

the server is currently unable to handle the request (get services https:kubernetes-dashboard:)

the server is currently unable to handle the request は

369         case http.StatusServiceUnavailable:
370                 reason = metav1.StatusReasonServiceUnavailable
371                 message = "the server is currently unable to handle the request"
oomichi commented 5 years ago

以下の理由により、ローカル環境でもスキップすることにした。

dashboard のインストール手順を調べて、「本当にコミュニティとして k8s 本体の CI でテストされんのかな」と疑問に思って調べてみたら とスキップされてました・・・これは pull-kubernetes-e2e-kops-aws の場合 '--test_args=--ginkgo.flakeAttempts=2 --ginkgo.skip=\[Slow\]|\[Serial\]|\[Disruptive\]|\[Flaky\]|\[Feature:.+\]|\[HPA\]|Dashboard|Services.*functioning.*NodePort'

gke でもスキップされている。

35 var _ = SIGDescribe("Kubernetes Dashboard", func() {
36         BeforeEach(func() {
37                 // TODO(kubernetes/kubernetes#61559): Enable dashboard here rather than skip the test.
38                 framework.SkipIfProviderIs("gke")
39         })