Add k8s example (#19)

examples/k8s/Makefile

@@ -0,0 +1,10 @@
+SOURCES :=	$(shell find . -name "*.proto" -not -path ./vendor/\*)
+
+TARGETS_K8S :=	$(foreach source, $(SOURCES), $(source)_k8s)
+
+.PHONY: build
+build: $(TARGETS_K8S)
+
+$(TARGETS_K8S): %_k8s:
+	@mkdir -p $(dir $*)gen
+	protoc $(PROTOC_OPTS) --gotemplate_out=debug=true,template_dir=./templates:$(dir $*)gen "$*"

examples/k8s/gen/nginx/dpl.yaml

@@ -0,0 +1,18 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: nginx
+  labels:
+    method: Hello-World-nginx
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        ports:
+        - containerPort: 80

examples/k8s/gen/nginx/svc.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx
+spec:
+  selector:
+    app: nginx
+  ports:
+  - name: http
+    port: 80

examples/k8s/nginx.proto

@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package nginx;
+
+message Empty {
+}
+
+service Nginx {
+  rpc Hello(Empty) returns (Empty) {}
+  rpc World(Empty) returns (Empty) {}
+}

examples/k8s/templates/{{.File.Package}}/dpl.yaml.tmpl

@@ -0,0 +1,18 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: {{.File.Package}}
+  labels:
+    method: {{range .Service.Method}}{{.Name}}-{{end}}{{.File.Package}}
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: {{.File.Package}}
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        ports:
+        - containerPort: 80

examples/k8s/templates/{{.File.Package}}/svc.yaml.tmpl

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{.File.Package}}
+spec:
+  selector:
+    app: {{.File.Package}}
+  ports:
+  - name: http
+    port: 80