Feat/#299 kube deployment (#311)

* -init created template file

* -added kubernetes template for deploy and expose a service.

* -instead of using "test" as tag, using the version defined in config.yml as tag. In future we may need to remove the version from the image name.

* -added following to the kubernetes deploy template:
       resource requests/limits
       liveness/readiness checks
       label for environment

light-rest-4j/src/main/java/com/networknt/codegen/rest/OpenApiGenerator.java

@@ -10,7 +10,10 @@
 import com.networknt.oas.OpenApiParser;
 import com.networknt.oas.model.*;
 import com.networknt.oas.model.impl.OpenApi3Impl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import javax.lang.model.SourceVersion;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -24,21 +27,8 @@
 import java.util.Map.Entry;
 import java.util.stream.Collectors;
 
-import com.networknt.oas.model.Example;
-import com.networknt.oas.model.MediaType;
-import com.networknt.oas.model.OpenApi3;
-import com.networknt.oas.model.Operation;
-import com.networknt.oas.model.Parameter;
-import com.networknt.oas.model.Path;
-import com.networknt.oas.model.Response;
-import com.networknt.oas.model.Schema;
-import com.networknt.oas.model.Server;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import static java.io.File.separator;
 
-import javax.lang.model.SourceVersion;
-
 /**
  * The input for OpenAPI 3.0 generator include config with json format and OpenAPI specification in yaml format.
  *
@@ -155,6 +145,7 @@ public void generate(final String targetPath, Object model, Any config) throws I
                 transfer(targetPath, "docker", "Dockerfile", templates.rest.dockerfile.template(config, expose));
                 transfer(targetPath, "docker", "Dockerfile-Redhat", templates.rest.dockerfileredhat.template(config, expose));
                 transfer(targetPath, "", "build.sh", templates.rest.buildSh.template(dockerOrganization, serviceId));
+                transfer(targetPath, "", "kubernetes.yml", templates.rest.kubernetes.template(dockerOrganization, serviceId, config.get("artifactId").toString().trim(), expose, version));
                 transfer(targetPath, "", ".gitignore", templates.rest.gitignore.template());
                 transfer(targetPath, "", "README.md", templates.rest.README.template());
                 transfer(targetPath, "", "LICENSE", templates.rest.LICENSE.template());

light-rest-4j/src/main/resources/templates/rest/kubernetes.rocker.raw

@@ -0,0 +1,58 @@
+@args (String org, String serviceId, String artifact, String expose, String version)
+#change the image tag before you deploy, if using minikube, please use any tag other than "latest"
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: @artifact-deployment
+  labels:
+    app: @artifact
+    environment: dev
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: @artifact
+  template:
+    metadata:
+      labels:
+        app: @artifact
+    spec:
+      containers:
+        - name: @artifact
+          image: @org/@serviceId:@version
+          ports:
+            - containerPort: @expose
+          resources:
+            requests:
+              memory: "64Mi"
+              #0.25 cpu
+              cpu: "250m"
+            limits:
+              #0.5 cpu
+              memory: "128Mi"
+              cpu: "500m"
+          #cannot use httpcheck due to the server can be https
+          readinessProbe:
+            tcpSocket:
+              port: @expose
+            initialDelaySeconds: 3
+            periodSeconds: 3
+          livenessProbe:
+            tcpSocket:
+              port: @expose
+            initialDelaySeconds: 5
+            periodSeconds: 20
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: @artifact-service
+  labels:
+    app: @artifact
+spec:
+  selector:
+    app: @artifact
+  type: NodePort
+  ports:
+    - protocol: TCP
+      port: @expose