Do not update a secret not referenced by ingress rules

test/e2e/framework/framework.go

@@ -172,6 +172,26 @@ func (f *Framework) WaitForNginxServer(name string, matcher func(cfg string) boo
 	return wait.PollImmediate(Poll, time.Minute*2, f.matchNginxConditions(name, matcher))
 }
 
+// NginxLogs returns the logs of the nginx ingress controller pod running
+func (f *Framework) NginxLogs() (string, error) {
+	l, err := f.KubeClientSet.CoreV1().Pods("ingress-nginx").List(metav1.ListOptions{
+		LabelSelector: "app=ingress-nginx",
+	})
+	if err != nil {
+		return "", err
+	}
+
+	if len(l.Items) == 0 {
+		return "", fmt.Errorf("no nginx ingress controller pod is running")
+	}
+
+	if len(l.Items) != 1 {
+		return "", fmt.Errorf("unexpected number of nginx ingress controller pod is running (%v)", len(l.Items))
+	}
+
+	return f.Logs(&l.Items[0])
+}
+
 func (f *Framework) matchNginxConditions(name string, matcher func(cfg string) bool) wait.ConditionFunc {
 	return func() (bool, error) {
 		l, err := f.KubeClientSet.CoreV1().Pods("ingress-nginx").List(metav1.ListOptions{

test/e2e/framework/logs.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2017 The Kubernetes 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 framework
+
+import (
+	"bytes"
+	"fmt"
+	"os/exec"
+
+	"k8s.io/api/core/v1"
+)
+
+func (f *Framework) Logs(pod *v1.Pod) (string, error) {
+	var (
+		execOut bytes.Buffer
+		execErr bytes.Buffer
+	)
+
+	if len(pod.Spec.Containers) != 1 {
+		return "", fmt.Errorf("could not determine which container to use")
+	}
+
+	args := fmt.Sprintf("kubectl logs -n %v %v", pod.Namespace, pod.Name)
+	cmd := exec.Command("/bin/bash", "-c", args)
+	cmd.Stdout = &execOut
+	cmd.Stderr = &execErr
+
+	err := cmd.Run()
+	if err != nil {
+		return "", fmt.Errorf("could not execute: %v", err)
+	}
+
+	if execErr.Len() > 0 {
+		return "", fmt.Errorf("stderr: %v", execErr.String())
+	}
+
+	return execOut.String(), nil
+}