Adds support for root context redirection

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

@@ -28,6 +28,7 @@ const (
 	addBaseURL       = "ingress.kubernetes.io/add-base-url"
 	sslRedirect      = "ingress.kubernetes.io/ssl-redirect"
 	forceSSLRedirect = "ingress.kubernetes.io/force-ssl-redirect"
+	appRoot          = "ingress.kubernetes.io/app-root"
 )
 
 // Redirect describes the per location redirect config
@@ -40,7 +41,8 @@ type Redirect struct {
 	// SSLRedirect indicates if the location section is accessible SSL only
 	SSLRedirect bool `json:"sslRedirect"`
 	// ForceSSLRedirect indicates if the location section is accessible SSL only
-	ForceSSLRedirect bool `json:"forceSSLRedirect"`
+	ForceSSLRedirect bool   `json:"forceSSLRedirect"`
+	AppRoot          string `json:"appRoot"`
 }
 
 type rewrite struct {
@@ -65,10 +67,12 @@ func (a rewrite) Parse(ing *extensions.Ingress) (interface{}, error) {
 		fSslRe = a.backendResolver.GetDefaultBackend().ForceSSLRedirect
 	}
 	abu, _ := parser.GetBoolAnnotation(addBaseURL, ing)
+	ar, _ := parser.GetStringAnnotation(appRoot, ing)
 	return &Redirect{
 		Target:           rt,
 		AddBaseURL:       abu,
 		SSLRedirect:      sslRe,
 		ForceSSLRedirect: fSslRe,
+		AppRoot:          ar,
 	}, nil
 }

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

@@ -158,3 +158,20 @@ func TestForceSSLRedirect(t *testing.T) {
 		t.Errorf("Expected true but returned false")
 	}
 }
+func TestAppRoot(t *testing.T) {
+	ing := buildIngress()
+
+	data := map[string]string{}
+	data[appRoot] = "/app1"
+	ing.SetAnnotations(data)
+
+	i, _ := NewParser(mockBackend{true}).Parse(ing)
+	redirect, ok := i.(*Redirect)
+	if !ok {
+		t.Errorf("expected a App Context")
+	}
+	if redirect.AppRoot != "/app1" {
+		t.Errorf("Unexpected value got in AppRoot")
+	}
+
+}

core/pkg/ingress/defaults/main.go

@@ -6,6 +6,8 @@ import "net"
 // The reason of this requirements is the annotations are generic. If some implementation do not supports
 // one or more annotations it just can provides defaults
 type Backend struct {
+	// AppRoot contains the AppRoot for apps that doesn't exposes its content in the 'root' context
+	AppRoot string `json:"app-root"`
 
 	// enables which HTTP codes should be passed for processing with the error_page directive
 	// http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_intercept_errors