Autoscale api model (#3586)

* adding fields to specify that we should autoscale a cluster. These will be user

admin override due to these changes not being used in acs-engine and thus the tests don't test it.

pkg/api/types.go

@@ -460,6 +460,9 @@ type AgentPoolProfile struct {
 	Extensions                   []Extension          `json:"extensions"`
 	KubernetesConfig             *KubernetesConfig    `json:"kubernetesConfig,omitempty"`
 	ImageRef                     *ImageReference      `json:"imageReference,omitempty"`
+	MaxCount                     *int                 `json:"maxCount,omitempty"`
+	MinCount                     *int                 `json:"minCount,omitempty"`
+	EnableAutoScaling            *bool                `json:"enableAutoScaling,omitempty"`
 }
 
 // AgentPoolProfileRole represents an agent role

pkg/helpers/helpers.go

@@ -65,6 +65,12 @@ func PointerToBool(b bool) *bool {
 	return &p
 }
 
+// PointerToInt returns a pointer to a int
+func PointerToInt(i int) *int {
+	p := i
+	return &p
+}
+
 // EqualError is a ni;-safe method which reports whether errors a and b are considered equal.
 // They're equal if both are nil, or both are not nil and a.Error() == b.Error().
 func EqualError(a, b error) bool {

pkg/helpers/helpers_test.go

@@ -84,6 +84,23 @@ func TestPointerToBool(t *testing.T) {
 	}
 }
 
+func TestPointerToInt(t *testing.T) {
+	int1 := 1
+	int2 := 2
+	ret1 := PointerToInt(int1)
+	if *ret1 != int1 {
+		t.Fatalf("expected PointerToInt(1) to return *1, instead returned %#v", ret1)
+	}
+	ret2 := PointerToInt(int2)
+	if *ret2 != int2 {
+		t.Fatalf("expected PointerToInt(2) to return *2, instead returned %#v", ret2)
+	}
+
+	if *ret2 <= *ret1 {
+		t.Fatalf("Pointers to ints messed up their values and made 2 <= 1")
+	}
+}
+
 func TestCreateSSH(t *testing.T) {
 	rg := rand.New(rand.NewSource(42))