Surpport snippet for server section by the annotation of the ingess

controllers/nginx/Makefile

@@ -3,7 +3,7 @@ all: push
 BUILDTAGS=
 
 # Use the 0.0 tag for testing, it shouldn't clobber any release builds
-RELEASE?=0.9.0-beta.8
+RELEASE?=0.9.0-beta.8.hack
 PREFIX?=gcr.io/google_containers/nginx-ingress-controller
 GOOS?=linux
 DOCKER?=gcloud docker --

controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl

@@ -286,6 +286,10 @@ http {
 
         {{ if $cfg.EnableVtsStatus }}vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;{{ end }}
 
+        {{ if not (empty $server.ServerSnippet) }}
+        {{ $server.ServerSnippet }}
+        {{ end }}
+
         {{ range $location := $server.Locations }}
         {{ $path := buildLocation $location }}
         {{ $authPath := buildAuthLocation $location }}

core/pkg/ingress/annotations/serversnippet/main.go

@@ -0,0 +1,42 @@
+/*
+Copyright 2016 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 serversnippet
+
+import (
+	extensions "k8s.io/client-go/pkg/apis/extensions/v1beta1"
+
+	"k8s.io/ingress/core/pkg/ingress/annotations/parser"
+)
+
+const (
+	annotation = "ingress.kubernetes.io/server-snippet"
+)
+
+type serverSnippet struct {
+}
+
+// NewParser creates a new CORS annotation parser
+func NewParser() parser.IngressAnnotation {
+	return serverSnippet{}
+}
+
+// Parse parses the annotations contained in the ingress rule
+// used to indicate if the location/s contains a fragment of
+// configuration to be included inside the paths of the rules
+func (a serverSnippet) Parse(ing *extensions.Ingress) (interface{}, error) {
+	return parser.GetStringAnnotation(annotation, ing)
+}

core/pkg/ingress/annotations/serversnippet/main_test.go

@@ -0,0 +1,58 @@
+/*
+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 serversnippet
+
+import (
+	"testing"
+
+	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	api "k8s.io/client-go/pkg/api/v1"
+	extensions "k8s.io/client-go/pkg/apis/extensions/v1beta1"
+)
+
+func TestParse(t *testing.T) {
+	ap := NewParser()
+	if ap == nil {
+		t.Fatalf("expected a parser.IngressAnnotation but returned nil")
+	}
+
+	testCases := []struct {
+		annotations map[string]string
+		expected    string
+	}{
+		{map[string]string{annotation: "more_headers"}, "more_headers"},
+		{map[string]string{annotation: "false"}, "false"},
+		{map[string]string{}, ""},
+		{nil, ""},
+	}
+
+	ing := &extensions.Ingress{
+		ObjectMeta: meta_v1.ObjectMeta{
+			Name:      "foo",
+			Namespace: api.NamespaceDefault,
+		},
+		Spec: extensions.IngressSpec{},
+	}
+
+	for _, testCase := range testCases {
+		ing.SetAnnotations(testCase.annotations)
+		result, _ := ap.Parse(ing)
+		if result != testCase.expected {
+			t.Errorf("expected %v but returned %v, annotations: %s", testCase.expected, result, testCase.annotations)
+		}
+	}
+}

core/pkg/ingress/controller/annotations.go

@@ -31,6 +31,7 @@ import (
 	"k8s.io/ingress/core/pkg/ingress/annotations/ratelimit"
 	"k8s.io/ingress/core/pkg/ingress/annotations/rewrite"
 	"k8s.io/ingress/core/pkg/ingress/annotations/secureupstream"
+	"k8s.io/ingress/core/pkg/ingress/annotations/serversnippet"
 	"k8s.io/ingress/core/pkg/ingress/annotations/sessionaffinity"
 	"k8s.io/ingress/core/pkg/ingress/annotations/snippet"
 	"k8s.io/ingress/core/pkg/ingress/annotations/sslpassthrough"
@@ -67,6 +68,7 @@ func newAnnotationExtractor(cfg extractorConfig) annotationExtractor {
 			"SessionAffinity":      sessionaffinity.NewParser(),
 			"SSLPassthrough":       sslpassthrough.NewParser(),
 			"ConfigurationSnippet": snippet.NewParser(),
+			"ServerSnippet":        serversnippet.NewParser(),
 		},
 	}
 }
@@ -104,6 +106,7 @@ const (
 	healthCheck     = "HealthCheck"
 	sslPassthrough  = "SSLPassthrough"
 	sessionAffinity = "SessionAffinity"
+	serverSnippet   = "ServerSnippet"
 )
 
 func (e *annotationExtractor) SecureUpstream(ing *extensions.Ingress) *secureupstream.Secure {
@@ -129,3 +132,11 @@ func (e *annotationExtractor) SessionAffinity(ing *extensions.Ingress) *sessiona
 	val, _ := e.annotations[sessionAffinity].Parse(ing)
 	return val.(*sessionaffinity.AffinityConfig)
 }
+
+func (e *annotationExtractor) ServerSnippet(ing *extensions.Ingress) string {
+	val, err := e.annotations[serverSnippet].Parse(ing)
+	if err != nil {
+		glog.Errorf("error parsing server snippet: %v", err)
+	}
+	return val.(string)
+}

core/pkg/ingress/controller/controller.go

@@ -1028,6 +1028,28 @@ func (ic *GenericController) createServers(data []interface{},
 		}
 	}
 
+	// configure server snippet
+	for _, ingIf := range data {
+		ing := ingIf.(*extensions.Ingress)
+		if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
+			continue
+		}
+
+		for _, rule := range ing.Spec.Rules {
+			host := rule.Host
+			if host == "" {
+				host = defServerName
+			}
+
+			srvsnippet := ic.annotations.ServerSnippet(ing)
+			// only add a server snippet if the server does not have one previously configured
+
+			if servers[host].ServerSnippet == "" && srvsnippet != "" {
+				servers[host].ServerSnippet = srvsnippet
+			}
+		}
+	}
+
 	return servers
 }
 

core/pkg/ingress/types.go

@@ -211,6 +211,9 @@ type Server struct {
 	// used to  determine if the secret changed without the use of file
 	// system notifications
 	SSLPemChecksum string `json:"sslPemChecksum"`
+
+	// ServerSnippet returns the snippet of server
+	ServerSnippet string `json:"serverSnippet"`
 	// Locations list of URIs configured in the server.
 	Locations []*Location `json:"locations,omitempty"`
 }