Fix error setting $service_name NGINX variable

internal/ingress/controller/template/template.go

@@ -871,6 +871,10 @@ func getIngressInformation(i, h, p interface{}) *ingressInformation {
 			continue
 		}
 
+		if hostname != rule.Host {
+			continue
+		}
+
 		for _, rPath := range rule.HTTP.Paths {
 			if path == rPath.Path {
 				info.Service = rPath.Backend.ServiceName

test/e2e/ingress/multiple_rules.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2019 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 ingress
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/onsi/ginkgo"
+	"github.com/stretchr/testify/assert"
+	networkingv1beta1 "k8s.io/api/networking/v1beta1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.IngressNginxDescribe("single ingress - multiple hosts", func() {
+	f := framework.NewDefaultFramework("simh")
+
+	ginkgo.BeforeEach(func() {
+		f.NewEchoDeploymentWithNameAndReplicas("first-service", 1)
+		f.NewEchoDeploymentWithNameAndReplicas("second-service", 1)
+	})
+
+	ginkgo.It("should set the correct $service_name NGINX variable", func() {
+		annotations := map[string]string{
+			"nginx.ingress.kubernetes.io/configuration-snippet": `more_set_input_headers "service-name: $service_name";`,
+		}
+
+		ing := framework.NewSingleIngress("simh", "/", "first.host", f.Namespace, "first-service", 80, annotations)
+
+		ing.Spec.Rules = append(ing.Spec.Rules, networkingv1beta1.IngressRule{
+			Host: "second.host",
+			IngressRuleValue: networkingv1beta1.IngressRuleValue{
+				HTTP: &networkingv1beta1.HTTPIngressRuleValue{
+					Paths: []networkingv1beta1.HTTPIngressPath{
+						{
+							Path: "/",
+							Backend: networkingv1beta1.IngressBackend{
+								ServiceName: "second-service",
+								ServicePort: intstr.FromInt(80),
+							},
+						},
+					},
+				},
+			},
+		})
+
+		f.EnsureIngress(ing)
+
+		f.WaitForNginxServer("first.host",
+			func(server string) bool {
+				return strings.Contains(server, "first.host")
+			})
+
+		f.WaitForNginxServer("second.host",
+			func(server string) bool {
+				return strings.Contains(server, "second.host")
+			})
+
+		body := f.HTTPTestClient().
+			GET("/exact").
+			WithHeader("Host", "first.host").
+			Expect().
+			Status(http.StatusOK).
+			Body().
+			Raw()
+
+		assert.Contains(ginkgo.GinkgoT(), body, "service-name=first-service")
+		assert.NotContains(ginkgo.GinkgoT(), body, "service-name=second-service")
+
+		body = f.HTTPTestClient().
+			GET("/exact").
+			WithHeader("Host", "second.host").
+			Expect().
+			Status(http.StatusOK).
+			Body().
+			Raw()
+
+		assert.NotContains(ginkgo.GinkgoT(), body, "service-name=first-service")
+		assert.Contains(ginkgo.GinkgoT(), body, "service-name=second-service")
+	})
+})