Add flag to allow setting a shutdown grace period

test/e2e/gracefulshutdown/grace_period.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2020 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 gracefulshutdown
+
+import (
+	"context"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/onsi/ginkgo"
+	"github.com/stretchr/testify/assert"
+	appsv1 "k8s.io/api/apps/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.IngressNginxDescribe("[Shutdown] Grace period shutdown", func() {
+	f := framework.NewDefaultFramework("shutdown-grace-period")
+
+	ginkgo.It("/healthz should return status code 500 during shutdown grace period", func() {
+
+		f.NewSlowEchoDeployment()
+
+		err := f.UpdateIngressControllerDeployment(func(deployment *appsv1.Deployment) error {
+			args := []string{}
+			for _, v := range deployment.Spec.Template.Spec.Containers[0].Args {
+				if strings.Contains(v, "--shutdown-grace-period") {
+					continue
+				}
+
+				args = append(args, v)
+			}
+
+			args = append(args, "--shutdown-grace-period=90")
+			deployment.Spec.Template.Spec.Containers[0].Args = args
+			cmds := []string{"/wait-shutdown"}
+			deployment.Spec.Template.Spec.Containers[0].Lifecycle.PreStop.Exec.Command = cmds
+			grace := int64(3600)
+			deployment.Spec.Template.Spec.TerminationGracePeriodSeconds = &grace
+			_, err := f.KubeClientSet.AppsV1().Deployments(f.Namespace).Update(context.TODO(), deployment, metav1.UpdateOptions{})
+			return err
+		})
+
+		assert.Nil(ginkgo.GinkgoT(), err, "updating ingress controller deployment flags")
+
+		ip := f.GetNginxPodIP()
+
+		err = f.VerifyHealthz(ip, http.StatusOK)
+		assert.Nil(ginkgo.GinkgoT(), err)
+
+		result := make(chan []error)
+		go func(c chan []error) {
+			defer ginkgo.GinkgoRecover()
+			errors := []error{}
+
+			framework.Sleep(60 * time.Second)
+
+			err = f.VerifyHealthz(ip, http.StatusInternalServerError)
+			if err != nil {
+				errors = append(errors, err)
+			}
+
+			c <- errors
+		}(result)
+
+		f.ScaleDeploymentToZero("nginx-ingress-controller")
+
+		for _, err := range <-result {
+			assert.Nil(ginkgo.GinkgoT(), err)
+		}
+
+	})
+})