make initial size or autoscaling policy required on creation time, no…

…degroup mutable, update tests

mmv1/products/compute/NodeGroup.yaml

@@ -16,10 +16,11 @@ name: 'NodeGroup'
 kind: 'compute#NodeGroup'
 base_url: projects/{{project}}/zones/{{zone}}/nodeGroups
 create_url: projects/{{project}}/zones/{{zone}}/nodeGroups?initialNodeCount=PRE_CREATE_REPLACE_ME
+update_verb: :PATCH
+update_mask: true
 has_self_link: true
 description: |
   Represents a NodeGroup resource to manage a group of sole-tenant nodes.
-immutable: true
 references: !ruby/object:Api::Resource::ReferenceLinks
   guides:
     'Sole-Tenant Nodes': 'https://cloud.google.com/compute/docs/nodes/'
@@ -43,12 +44,6 @@ async: !ruby/object:Api::OpAsync
   error: !ruby/object:Api::OpAsync::Error
     path: 'error/errors'
     message: 'message'
-docs: !ruby/object:Provider::Terraform::Docs
-  warning: |
-    Due to limitations of the API, Terraform cannot update the
-    number of nodes in a node group and changes to node group size either
-    through Terraform config or through external changes will cause
-    Terraform to delete and recreate the node group.
 examples:
   - !ruby/object:Provider::Terraform::Examples
     name: 'node_group_basic'
@@ -112,21 +107,13 @@ properties:
   - !ruby/object:Api::Type::Integer
     name: 'size'
     description: |
-      The total number of nodes in the node group. One of `initial_size` or `size` must be specified.
-    immutable: true
-    send_empty_value: true
-    default_from_api: true
-    exactly_one_of:
-      - size
-      - initial_size
+      The total number of nodes in the node group.
+    output: true
   - !ruby/object:Api::Type::Integer
     name: 'initialSize'
     description: |
-      The initial number of nodes in the node group. One of `initial_size` or `size` must be specified.
+      The initial number of nodes in the node group. One of `initial_size` or `autoscaling_policy` must be configured on resource creation.
     url_param_only: true
-    exactly_one_of:
-      - size
-      - initial_size
   - !ruby/object:Api::Type::String
     name: 'maintenancePolicy'
     description: |
@@ -147,6 +134,8 @@ properties:
     description: |
       If you use sole-tenant nodes for your workloads, you can use the node
       group autoscaler to automatically manage the sizes of your node groups.
+
+      One of `initial_size` or `autoscaling_policy` must be configured on resource creation.
     default_from_api: true
     properties:
       - !ruby/object:Api::Type::Enum

mmv1/templates/terraform/pre_create/compute_node_group_url_replace.go.erb

@@ -1,8 +1,12 @@
 var sizeParam string
-if v, ok := d.GetOkExists("size"); ok {
-	sizeParam = fmt.Sprintf("%v", v)
-} else if v, ok := d.GetOkExists("initial_size"); ok {
+if v, ok := d.GetOkExists("initial_size"); ok {
 	sizeParam = fmt.Sprintf("%v", v)
+}else{
+	if _, ok := d.GetOkExists("autoscaling_policy"); ok{
+		sizeParam = fmt.Sprintf("%v", d.Get("autoscaling_policy.min_nodes"))
+	}else{
+		return errors.New("An initial_size or autoscaling_policy must be configured on node group creation.")
+	}
 }
 
 url = regexp.MustCompile("PRE_CREATE_REPLACE_ME").ReplaceAllLiteralString(url, sizeParam)

mmv1/third_party/terraform/services/compute/resource_compute_node_group_test.go.erb

@@ -8,12 +8,14 @@ import (
 	"strings"
 	"time"
 
+	"regexp"
+
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
 	"github.com/hashicorp/terraform-provider-google/google/acctest"
 )
 
-func TestAccComputeNodeGroup_updateNodeTemplate(t *testing.T) {
+func TestAccComputeNodeGroup_update(t *testing.T) {
 	t.Parallel()
 
 	groupName := fmt.Sprintf("group--%d", acctest.RandInt(t))
@@ -26,31 +28,54 @@ func TestAccComputeNodeGroup_updateNodeTemplate(t *testing.T) {
 		CheckDestroy:             testAccCheckComputeNodeGroupDestroyProducer(t),
 		Steps: []resource.TestStep{
 			{
-				Config: testAccComputeNodeGroup_updateNodeTemplate(groupName, tmplPrefix, "tmpl1"),
+				Config: testAccComputeNodeGroup_update(groupName, tmplPrefix, "tmpl1"),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckComputeNodeGroupCreationTimeBefore(&timeCreated),
 				),
 			},
 			{
-				ResourceName:      "google_compute_node_group.nodes",
-				ImportState:       true,
-				ImportStateVerify: true,
+				ResourceName:            "google_compute_node_group.nodes",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"initial_size"},
 			},
 			{
-				Config: testAccComputeNodeGroup_updateNodeTemplate(groupName, tmplPrefix, "tmpl2"),
+				Config: testAccComputeNodeGroup_update2(groupName, tmplPrefix, "tmpl2"),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckComputeNodeGroupCreationTimeBefore(&timeCreated),
 				),
 			},
 			{
-				ResourceName:      "google_compute_node_group.nodes",
-				ImportState:       true,
-				ImportStateVerify: true,
+				ResourceName:            "google_compute_node_group.nodes",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"initial_size"},
 			},
 		},
 	})
 }
 
+func TestAccComputeNodeGroup_fail(t *testing.T) {
+	t.Parallel()
+
+	groupName := fmt.Sprintf("group--%d", acctest.RandInt(t))
+	tmplPrefix := fmt.Sprintf("tmpl--%d", acctest.RandInt(t))
+
+	var timeCreated time.Time
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckComputeNodeGroupDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccComputeNodeGroup_fail(groupName, tmplPrefix, "tmpl1"),
+				ExpectError: regexp.MustCompile("An initial_size or autoscaling_policy must be configured on node group creation."),
+			},
+		},
+	})
+}
+
+
 func testAccCheckComputeNodeGroupCreationTimeBefore(prevTimeCreated *time.Time) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		for name, rs := range s.RootModule().Resources {
@@ -86,7 +111,7 @@ func testAccCheckComputeNodeGroupCreationTimeBefore(prevTimeCreated *time.Time)
 	}
 }
 
-func testAccComputeNodeGroup_updateNodeTemplate(groupName, tmplPrefix, tmplToUse string) string {
+func testAccComputeNodeGroup_update(groupName, tmplPrefix, tmplToUse string) string {
 	return fmt.Sprintf(`
 resource "google_compute_node_template" "tmpl1" {
   name      = "%s-first"
@@ -105,8 +130,58 @@ resource "google_compute_node_group" "nodes" {
   zone        = "us-central1-a"
   description = "example google_compute_node_group for Terraform Google Provider"
 
-  size          = 0
+  initial_size = 1
   node_template = google_compute_node_template.%s.self_link
 }
+
 `, tmplPrefix, tmplPrefix, groupName, tmplToUse)
 }
+
+func testAccComputeNodeGroup_update2(groupName, tmplPrefix, tmplToUse string) string {
+	return fmt.Sprintf(`
+resource "google_compute_node_template" "tmpl1" {
+  name      = "%s-first"
+  region    = "us-central1"
+  node_type = "n1-node-96-624"
+}
+
+resource "google_compute_node_template" "tmpl2" {
+  name      = "%s-second"
+  region    = "us-central1"
+  node_type = "n1-node-96-624"
+}
+
+resource "google_compute_node_group" "nodes" {
+  name        = "%s"
+  zone        = "us-central1-a"
+  description = "example google_compute_node_group for Terraform Google Provider"
+
+  autoscaling_policy {
+    mode      = "ONLY_SCALE_OUT"
+    min_nodes = 1
+    max_nodes = 10
+  }
+  node_template = google_compute_node_template.%s.self_link
+}
+
+`, tmplPrefix, tmplPrefix, groupName, tmplToUse)
+}
+
+func testAccComputeNodeGroup_update(groupName, tmplPrefix, tmplToUse string) string {
+	return fmt.Sprintf(`
+resource "google_compute_node_template" "tmpl1" {
+  name      = "%s-first"
+  region    = "us-central1"
+  node_type = "n1-node-96-624"
+}
+
+resource "google_compute_node_group" "nodes" {
+  name        = "%s"
+  zone        = "us-central1-a"
+  description = "example google_compute_node_group for Terraform Google Provider"
+
+  node_template = google_compute_node_template.%s.self_link
+}
+
+`, tmplPrefix, tmplPrefix, groupName, tmplToUse)
+}