Fill in Default Values for CPU/Memory (#130)

Update k8s client and the dependencies
ACI client change for Mocking
Add ACI Provider Mock Tests
Add the Windows development environment
Add UT for Default Resource Requests
Enable the make test in Docker file
Update the vendors

vendor/k8s.io/client-go/examples/create-update-delete-deployment/main.go

@@ -22,23 +22,28 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"path/filepath"
 
 	appsv1beta1 "k8s.io/api/apps/v1beta1"
 	apiv1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/client-go/util/homedir"
+	"k8s.io/client-go/util/retry"
 	// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
 	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
 )
 
 func main() {
-	kubeconfig := flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
-	flag.Parse()
-	if *kubeconfig == "" {
-		panic("-kubeconfig not specified")
+	var kubeconfig *string
+	if home := homedir.HomeDir(); home != "" {
+		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
+	} else {
+		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
 	}
+	flag.Parse()
+
 	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
 	if err != nil {
 		panic(err)
@@ -66,7 +71,7 @@ func main() {
 					Containers: []apiv1.Container{
 						{
 							Name:  "web",
-							Image: "nginx:1.13",
+							Image: "nginx:1.12",
 							Ports: []apiv1.ContainerPort{
 								{
 									Name:          "http",
@@ -97,36 +102,53 @@ func main() {
 	//    1. Modify the "deployment" variable and call: Update(deployment).
 	//       This works like the "kubectl replace" command and it overwrites/loses changes
 	//       made by other clients between you Create() and Update() the object.
-	//    2. Modify the "result" returned by Create()/Get() and retry Update(result) until
+	//    2. Modify the "result" returned by Get() and retry Update(result) until
 	//       you no longer get a conflict error. This way, you can preserve changes made
-	//       by other clients between Create() and Update(). This is implemented below:
+	//       by other clients between Create() and Update(). This is implemented below
+	//			 using the retry utility package included with client-go. (RECOMMENDED)
+	//
+	// More Info:
+	// https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#concurrency-control-and-consistency
 
-	for {
-		result.Spec.Replicas = int32Ptr(1)                    // reduce replica count
-		result.Spec.Template.Annotations = map[string]string{ // add annotations
-			"foo": "bar",
+	retryErr := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		// Retrieve the latest version of Deployment before attempting update
+		// RetryOnConflict uses exponential backoff to avoid exhausting the apiserver
+		result, getErr := deploymentsClient.Get("demo-deployment", metav1.GetOptions{})
+		if getErr != nil {
+			panic(fmt.Errorf("Failed to get latest version of Deployment: %v", getErr))
 		}
 
-		if _, err := deploymentsClient.Update(result); errors.IsConflict(err) {
-			// Deployment is modified in the meanwhile, query the latest version
-			// and modify the retrieved object.
-			fmt.Println("encountered conflict, retrying")
-			result, err = deploymentsClient.Get("demo-deployment", metav1.GetOptions{})
-			if err != nil {
-				panic(fmt.Errorf("Get failed: %+v", err))
-			}
-		} else if err != nil {
-			panic(err)
-		} else {
-			break
-		}
-
-		// TODO: You should sleep here with an exponential backoff to avoid
-		// exhausting the apiserver, and add a limit/timeout on the retries to
-		// avoid getting stuck in this loop indefintiely.
+		result.Spec.Replicas = int32Ptr(1)                           // reduce replica count
+		result.Spec.Template.Spec.Containers[0].Image = "nginx:1.13" // change nginx version
+		_, updateErr := deploymentsClient.Update(result)
+		return updateErr
+	})
+	if retryErr != nil {
+		panic(fmt.Errorf("Update failed: %v", retryErr))
 	}
 	fmt.Println("Updated deployment...")
 
+	// Rollback Deployment
+	prompt()
+	fmt.Println("Rolling back deployment...")
+	// Once again use RetryOnConflict to avoid update conflicts
+	retryErr = retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		result, getErr := deploymentsClient.Get("demo-deployment", metav1.GetOptions{})
+		if getErr != nil {
+			panic(fmt.Errorf("Failed to get latest version of Deployment: %v", getErr))
+		}
+
+		result.Spec.RollbackTo = &appsv1beta1.RollbackConfig{
+			Revision: 0, // can be specific revision number, or 0 for last revision
+		}
+		_, updateErr := deploymentsClient.Update(result)
+		return updateErr
+	})
+	if retryErr != nil {
+		panic(fmt.Errorf("Rollback failed: %v", retryErr))
+	}
+	fmt.Println("Rolled back deployment...")
+
 	// List Deployments
 	prompt()
 	fmt.Printf("Listing deployments in namespace %q:\n", apiv1.NamespaceDefault)