Add Custom response header e2e test

cmd/e2e-test/customresponseheaders_test.go

@@ -0,0 +1,139 @@
+/*
+Copyright 2022 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 main
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"testing"
+
+	v1 "k8s.io/api/networking/v1"
+	"k8s.io/ingress-gce/pkg/annotations"
+	backendconfig "k8s.io/ingress-gce/pkg/apis/backendconfig/v1"
+	"k8s.io/ingress-gce/pkg/e2e"
+	"k8s.io/ingress-gce/pkg/e2e/adapter"
+	"k8s.io/ingress-gce/pkg/fuzz"
+	"k8s.io/ingress-gce/pkg/fuzz/features"
+	"k8s.io/ingress-gce/pkg/utils"
+)
+
+func TestCustomResponseHeaders(t *testing.T) {
+	t.Parallel()
+
+	ing := fuzz.NewIngressBuilder("", "ingress-1", "").
+		AddPath("test.com", "/", "service-1", v1.ServiceBackendPort{Number: 80}).
+		Build()
+
+	for _, tc := range []struct {
+		desc     string
+		beConfig *backendconfig.BackendConfig
+	}{
+		{
+			desc: "http one path w/ Custom Response header.",
+			beConfig: fuzz.NewBackendConfigBuilder("", "backendconfig-1").
+				AddCustomResponseHeader("X-Test-Header: test").
+				Build(),
+		},
+	} {
+		tc := tc // Capture tc as we are running this in parallel.
+		Framework.RunWithSandbox(tc.desc, t, func(t *testing.T, s *e2e.Sandbox) {
+			t.Parallel()
+			ctx := context.Background()
+
+			backendConfigAnnotation := map[string]string{
+				annotations.BetaBackendConfigKey: `{"default":"backendconfig-1"}`,
+			}
+			bcCRUD := adapter.BackendConfigCRUD{C: Framework.BackendConfigClient}
+			tc.beConfig.Namespace = s.Namespace
+			if _, err := bcCRUD.Create(tc.beConfig); err != nil {
+				t.Fatalf(appendDesc(tc.desc, "error creating BackendConfig: %v"), err)
+			}
+			t.Logf(appendDesc(tc.desc, "BackendConfig created (%s/%s) "), s.Namespace, tc.beConfig.Name)
+
+			_, err := e2e.CreateEchoService(s, "service-1", backendConfigAnnotation)
+			if err != nil {
+				t.Fatalf(appendDesc(tc.desc, "error creating echo service: %v"), err)
+			}
+			t.Logf(appendDesc(tc.desc, "Echo service created (%s/%s)"), s.Namespace, "service-1")
+
+			ing.Namespace = s.Namespace
+			crud := adapter.IngressCRUD{C: Framework.Clientset}
+			if _, err := crud.Create(ing); err != nil {
+				t.Fatalf(appendDesc(tc.desc, "error creating Ingress spec: %v"), err)
+			}
+			t.Logf(appendDesc(tc.desc, "Ingress created (%s/%s)"), s.Namespace, ing.Name)
+
+			ing, err := e2e.WaitForIngress(s, ing, nil, nil)
+			if err != nil {
+				t.Fatalf(appendDesc(tc.desc, "error waiting for Ingress to stabilize: %v"), err)
+			}
+			t.Logf(appendDesc(tc.desc, "GCLB resources created (%s/%s)"), s.Namespace, ing.Name)
+
+			vip := ing.Status.LoadBalancer.Ingress[0].IP
+			t.Logf(appendDesc(tc.desc, "Ingress %s/%s VIP = %s"), s.Namespace, ing.Name, vip)
+			params := &fuzz.GCLBForVIPParams{VIP: vip, Validators: fuzz.FeatureValidators(features.All)}
+			gclb, err := fuzz.GCLBForVIP(context.Background(), Framework.Cloud, params)
+			if err != nil {
+				t.Fatalf(appendDesc(tc.desc, "Error getting GCP resources for LB with IP = %q: %v"), vip, err)
+			}
+			if tc.beConfig.Spec.CustomResponseHeaders != nil {
+				verifyResponseHeaders(t, gclb, s.Namespace, "service-1", tc.beConfig.Spec.CustomResponseHeaders, tc.desc)
+			}
+
+			// Wait for GCLB resources to be deleted.
+			if err := crud.Delete(ing.Namespace, ing.Name); err != nil {
+				t.Errorf(appendDesc(tc.desc, "Delete(%q) = %v, want nil"), ing.Name, err)
+			}
+
+			deleteOptions := &fuzz.GCLBDeleteOptions{
+				SkipDefaultBackend: true,
+			}
+			t.Logf(appendDesc(tc.desc, "Waiting for GCLB resources to be deleted (%s/%s)"), s.Namespace, ing.Name)
+			if err := e2e.WaitForGCLBDeletion(ctx, Framework.Cloud, gclb, deleteOptions); err != nil {
+				t.Errorf("e2e.WaitForGCLBDeletion(...) = %v, want nil", err)
+			}
+			t.Logf(appendDesc(tc.desc, "GCLB resources deleted (%s/%s)"), s.Namespace, ing.Name)
+		})
+	}
+}
+
+func verifyResponseHeaders(t *testing.T, gclb *fuzz.GCLB, svcNamespace, svcName string, expectedCustomResponseHeaders *backendconfig.CustomResponseHeadersConfig, testDesc string) error {
+	numBsWithCRH := 0
+	for _, bs := range gclb.BackendService {
+		desc := utils.DescriptionFromString(bs.GA.Description)
+		if desc.ServiceName != fmt.Sprintf("%s/%s", svcNamespace, svcName) {
+			continue
+		}
+		headers := bs.GA.CustomResponseHeaders
+		if !reflect.DeepEqual(headers, expectedCustomResponseHeaders.Headers) {
+			return fmt.Errorf("backend service %q has custom response headers %v, want %v", bs.GA.Name, headers, expectedCustomResponseHeaders.Headers)
+		}
+
+		t.Logf(appendDesc(testDesc, "Backend service %q has expected custom response headers"), bs.GA.Name)
+		numBsWithCRH = numBsWithCRH + 1
+	}
+	if numBsWithCRH != 1 {
+		return fmt.Errorf("unexpected number of backend service has custom response headers: got %d, want 1", numBsWithCRH)
+	}
+	return nil
+}
+
+// Append test description to the log for debugging
+func appendDesc(desc string, format string) string {
+	return fmt.Sprintf("[%s]: %s", desc, format)
+}

pkg/fuzz/helpers.go

@@ -447,6 +447,15 @@ func (b *BackendConfigBuilder) AddCustomRequestHeader(header string) *BackendCon
 	return b
 }
 
+// AddCustomResponseHeader adds a custom response header to the BackendConfig.
+func (b *BackendConfigBuilder) AddCustomResponseHeader(header string) *BackendConfigBuilder {
+	if b.backendConfig.Spec.CustomResponseHeaders == nil {
+		b.backendConfig.Spec.CustomResponseHeaders = &backendconfig.CustomResponseHeadersConfig{}
+	}
+	b.backendConfig.Spec.CustomResponseHeaders.Headers = append(b.backendConfig.Spec.CustomResponseHeaders.Headers, header)
+	return b
+}
+
 // SetHealthCheckPath adds a health check path override.
 func (b *BackendConfigBuilder) SetHealthCheckPath(path string) *BackendConfigBuilder {
 	if b.backendConfig.Spec.HealthCheck == nil {