Add a custom controller example

examples/custom-controller/Makefile

@@ -0,0 +1,39 @@
+# Copyright 2017 The Kubernetes Authors All rights reserved.
+#
+# 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.
+
+# Build the default backend binary or image for amd64, arm, arm64 and ppc64le
+#
+# Usage:
+# 	[PREFIX=gcr.io/google_containers/dummy-ingress-controller] [ARCH=amd64] [TAG=1.1] make (server|container|push)
+
+all: push
+
+TAG=0.1
+PREFIX?=bprashanth/dummy-ingress-controller
+ARCH?=amd64
+GOLANG_VERSION=1.6
+TEMP_DIR:=$(shell mktemp -d)
+
+server: server.go
+	CGO_ENABLED=0 GOOS=linux GOARCH=$(ARCH) GOARM=6 godep go build -a -installsuffix cgo -ldflags '-w' -o server ./server.go
+
+container: server
+	docker build --pull -t $(PREFIX)-$(ARCH):$(TAG) .
+
+push: container
+	gcloud docker push $(PREFIX)-$(ARCH):$(TAG)
+
+clean:
+	rm -f server
+