From 0829bcc8fc634255cacd247c60e69517e10b9db1 Mon Sep 17 00:00:00 2001
From: nikhiljindal <nikhiljindal@google.com>
Date: Thu, 8 Oct 2015 14:03:32 -0700
Subject: [PATCH] Defaulting deployment selector and label

---
 pkg/apis/extensions/v1beta1/defaults.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/pkg/apis/extensions/v1beta1/defaults.go b/pkg/apis/extensions/v1beta1/defaults.go
index 655e17310e4..2d6efb04845 100644
--- a/pkg/apis/extensions/v1beta1/defaults.go
+++ b/pkg/apis/extensions/v1beta1/defaults.go
@@ -44,6 +44,19 @@ func addDefaultingFuncs() {
 			}
 		},
 		func(obj *Deployment) {
+			// Default labels and selector to labels from pod template spec.
+			var labels map[string]string
+			if obj.Spec.Template != nil {
+				labels = obj.Spec.Template.Labels
+			}
+			if labels != nil {
+				if len(obj.Spec.Selector) == 0 {
+					obj.Spec.Selector = labels
+				}
+				if len(obj.Labels) == 0 {
+					obj.Labels = labels
+				}
+			}
 			// Set DeploymentSpec.Replicas to 1 if it is not set.
 			if obj.Spec.Replicas == nil {
 				obj.Spec.Replicas = new(int)