Add Update Connector Support for VPC Access Connectors (#8205)

* Add Update Connetor Support for VPC Access Connectors

* fix lint

* fix go lint

* fix tests

Signed-off-by: Modular Magician <magic-modules@google.com>

.changelog/8205.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+vpcaccess: added support for updates to `google_vpc_access_connector` resource
+```

google/data_source_vpc_access_connector_test.go

@@ -42,6 +42,8 @@ resource "google_vpc_access_connector" "connector" {
   ip_cidr_range = "10.8.0.0/28"
   network       = "default"
   region        = "us-central1"
+  min_instances = 2
+  max_instances = 3
 }
 
 data "google_vpc_access_connector" "connector" {

google/resource_app_engine_standard_app_version_test.go

@@ -179,6 +179,8 @@ resource "google_vpc_access_connector" "bar" {
   region = "us-central1"
   ip_cidr_range = "10.8.0.0/28"
   network = "default"
+  min_instances = 3
+  max_instances = 10
 }
 
 resource "google_app_engine_standard_app_version" "foo" {

google/resource_cloudfunctions_function_test.go

@@ -955,6 +955,8 @@ resource "google_vpc_access_connector" "%s" {
   region        = "us-central1"
   ip_cidr_range = "%s"
   network       = google_compute_network.vpc.name
+  min_instances = 3
+  max_instances = 10
 }
 
 resource "google_storage_bucket" "bucket" {

google/resource_vpc_access_connector_generated_test.go

@@ -59,8 +59,10 @@ func testAccVPCAccessConnector_vpcAccessConnectorExample(context map[string]inte
 	return acctest.Nprintf(`
 resource "google_vpc_access_connector" "connector" {
   name          = "tf-test-vpc-con%{random_suffix}"
-  ip_cidr_range = "10.8.0.0/28"
+  ip_cidr_range = "10.18.0.0/28"
   network       = "default"
+  min_instances  = 2
+  max_instances  = 3
 }
 `, context)
 }
@@ -98,6 +100,8 @@ resource "google_vpc_access_connector" "connector" {
     name = google_compute_subnetwork.custom_test.name
   }
   machine_type = "e2-standard-4"
+  min_instances = 2
+  max_instances = 3
 }
 
 resource "google_compute_subnetwork" "custom_test" {

google/resource_vpc_access_connector_test.go

@@ -33,6 +33,38 @@ func TestAccVPCAccessConnector_vpcAccessConnectorThroughput(t *testing.T) {
 	})
 }
 
+func TestAccVPCAccessConnector_vpcAccessConnectorMachineAndInstancesChanged(t *testing.T) {
+	t.Parallel()
+
+	context := map[string]interface{}{
+		"random_suffix": RandString(t, 10),
+	}
+
+	VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckVPCAccessConnectorDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccVPCAccessConnector_vpcAccessConnectorThroughput(context),
+			},
+			{
+				ResourceName:      "google_vpc_access_connector.connector",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+			{
+				Config: testAccVPCAccessConnector_vpcAccessConnectorMachineAndInstancesChanged(context),
+			},
+			{
+				ResourceName:      "google_vpc_access_connector.connector",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func testAccVPCAccessConnector_vpcAccessConnectorThroughput(context map[string]interface{}) string {
 	return acctest.Nprintf(`
 resource "google_vpc_access_connector" "connector" {
@@ -59,3 +91,30 @@ resource "google_compute_network" "custom_test" {
 }
 `, context)
 }
+
+func testAccVPCAccessConnector_vpcAccessConnectorMachineAndInstancesChanged(context map[string]interface{}) string {
+	return Nprintf(`
+resource "google_vpc_access_connector" "connector" {
+  name          = "tf-test-vpc-con%{random_suffix}"
+  subnet {
+    name = google_compute_subnetwork.custom_test.name
+  }
+  machine_type  = "e2-micro"
+  min_instances = 3
+  max_instances = 5
+  region        = "us-central1"
+}
+
+resource "google_compute_subnetwork" "custom_test" {
+  name          = "tf-test-vpc-con%{random_suffix}"
+  ip_cidr_range = "10.2.0.0/28"
+  region        = "us-central1"
+  network       = google_compute_network.custom_test.id
+}
+
+resource "google_compute_network" "custom_test" {
+  name                    = "tf-test-vpc-con%{random_suffix}"
+  auto_create_subnetworks = false
+}
+`, context)
+}

google/services/vpcaccess/resource_vpc_access_connector.go

@@ -18,22 +18,31 @@
 package vpcaccess
 
 import (
+	"context"
 	"fmt"
 	"log"
 	"reflect"
+	"strings"
 	"time"
 
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/customdiff"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 
 	"github.com/hashicorp/terraform-provider-google/google/tpgresource"
 	transport_tpg "github.com/hashicorp/terraform-provider-google/google/transport"
 )
 
+// Are the number of min/max instances reduced?
+func AreInstancesReduced(_ context.Context, old, new, _ interface{}) bool {
+	return new.(int) < old.(int)
+}
+
 func ResourceVPCAccessConnector() *schema.Resource {
 	return &schema.Resource{
 		Create: resourceVPCAccessConnectorCreate,
 		Read:   resourceVPCAccessConnectorRead,
+		Update: resourceVPCAccessConnectorUpdate,
 		Delete: resourceVPCAccessConnectorDelete,
 
 		Importer: &schema.ResourceImporter{
@@ -42,9 +51,14 @@ func ResourceVPCAccessConnector() *schema.Resource {
 
 		Timeouts: &schema.ResourceTimeout{
 			Create: schema.DefaultTimeout(20 * time.Minute),
+			Update: schema.DefaultTimeout(20 * time.Minute),
 			Delete: schema.DefaultTimeout(20 * time.Minute),
 		},
 
+		CustomizeDiff: customdiff.All(
+			customdiff.ForceNewIfChange("min_instances", AreInstancesReduced),
+			customdiff.ForceNewIfChange("max_instances", AreInstancesReduced)),
+
 		Schema: map[string]*schema.Schema{
 			"name": {
 				Type:        schema.TypeString,
@@ -62,39 +76,36 @@ func ResourceVPCAccessConnector() *schema.Resource {
 			"machine_type": {
 				Type:        schema.TypeString,
 				Optional:    true,
-				ForceNew:    true,
 				Description: `Machine type of VM Instance underlying connector. Default is e2-micro`,
 				Default:     "e2-micro",
 			},
 			"max_instances": {
 				Type:        schema.TypeInt,
 				Computed:    true,
 				Optional:    true,
-				ForceNew:    true,
 				Description: `Maximum value of instances in autoscaling group underlying the connector.`,
 			},
 			"max_throughput": {
 				Type:         schema.TypeInt,
+				Computed:     true,
 				Optional:     true,
 				ForceNew:     true,
-				ValidateFunc: validation.IntBetween(200, 1000),
-				Description:  `Maximum throughput of the connector in Mbps, must be greater than 'min_throughput'. Default is 300.`,
-				Default:      300,
+				ValidateFunc: validation.IntBetween(300, 1000),
+				Description:  `Maximum throughput of the connector in Mbps, must be greater than 'min_throughput'. Default is 1000.`,
 			},
 			"min_instances": {
 				Type:        schema.TypeInt,
 				Computed:    true,
 				Optional:    true,
-				ForceNew:    true,
 				Description: `Minimum value of instances in autoscaling group underlying the connector.`,
 			},
 			"min_throughput": {
 				Type:         schema.TypeInt,
+				Computed:     true,
 				Optional:     true,
 				ForceNew:     true,
-				ValidateFunc: validation.IntBetween(200, 1000),
+				ValidateFunc: validation.IntBetween(200, 900),
 				Description:  `Minimum throughput of the connector in Mbps. Default and min is 200.`,
-				Default:      200,
 			},
 			"network": {
 				Type:             schema.TypeString,
@@ -405,6 +416,104 @@ func resourceVPCAccessConnectorRead(d *schema.ResourceData, meta interface{}) er
 	return nil
 }
 
+func resourceVPCAccessConnectorUpdate(d *schema.ResourceData, meta interface{}) error {
+	config := meta.(*transport_tpg.Config)
+	userAgent, err := tpgresource.GenerateUserAgentString(d, config.UserAgent)
+	if err != nil {
+		return err
+	}
+
+	billingProject := ""
+
+	project, err := tpgresource.GetProject(d, config)
+	if err != nil {
+		return fmt.Errorf("Error fetching project for Connector: %s", err)
+	}
+	billingProject = project
+
+	obj := make(map[string]interface{})
+	machineTypeProp, err := expandVPCAccessConnectorMachineType(d.Get("machine_type"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("machine_type"); !tpgresource.IsEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, machineTypeProp)) {
+		obj["machineType"] = machineTypeProp
+	}
+	minInstancesProp, err := expandVPCAccessConnectorMinInstances(d.Get("min_instances"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("min_instances"); !tpgresource.IsEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, minInstancesProp)) {
+		obj["minInstances"] = minInstancesProp
+	}
+	maxInstancesProp, err := expandVPCAccessConnectorMaxInstances(d.Get("max_instances"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("max_instances"); !tpgresource.IsEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, maxInstancesProp)) {
+		obj["maxInstances"] = maxInstancesProp
+	}
+
+	obj, err = resourceVPCAccessConnectorEncoder(d, meta, obj)
+	if err != nil {
+		return err
+	}
+
+	url, err := tpgresource.ReplaceVars(d, config, "{{VPCAccessBasePath}}projects/{{project}}/locations/{{region}}/connectors/{{name}}")
+	if err != nil {
+		return err
+	}
+
+	log.Printf("[DEBUG] Updating Connector %q: %#v", d.Id(), obj)
+	updateMask := []string{}
+
+	if d.HasChange("machine_type") {
+		updateMask = append(updateMask, "machineType")
+	}
+
+	if d.HasChange("min_instances") {
+		updateMask = append(updateMask, "minInstances")
+	}
+
+	if d.HasChange("max_instances") {
+		updateMask = append(updateMask, "maxInstances")
+	}
+	// updateMask is a URL parameter but not present in the schema, so ReplaceVars
+	// won't set it
+	url, err = transport_tpg.AddQueryParams(url, map[string]string{"updateMask": strings.Join(updateMask, ",")})
+	if err != nil {
+		return err
+	}
+
+	// err == nil indicates that the billing_project value was found
+	if bp, err := tpgresource.GetBillingProject(d, config); err == nil {
+		billingProject = bp
+	}
+
+	res, err := transport_tpg.SendRequest(transport_tpg.SendRequestOptions{
+		Config:    config,
+		Method:    "PATCH",
+		Project:   billingProject,
+		RawURL:    url,
+		UserAgent: userAgent,
+		Body:      obj,
+		Timeout:   d.Timeout(schema.TimeoutUpdate),
+	})
+
+	if err != nil {
+		return fmt.Errorf("Error updating Connector %q: %s", d.Id(), err)
+	} else {
+		log.Printf("[DEBUG] Finished updating Connector %q: %#v", d.Id(), res)
+	}
+
+	err = VPCAccessOperationWaitTime(
+		config, res, project, "Updating Connector", userAgent,
+		d.Timeout(schema.TimeoutUpdate))
+
+	if err != nil {
+		return err
+	}
+
+	return resourceVPCAccessConnectorRead(d, meta)
+}
+
 func resourceVPCAccessConnectorDelete(d *schema.ResourceData, meta interface{}) error {
 	config := meta.(*transport_tpg.Config)
 	userAgent, err := tpgresource.GenerateUserAgentString(d, config.UserAgent)

website/docs/r/vpc_access_connector.html.markdown

@@ -39,8 +39,10 @@ To get more information about Connector, see:
 ```hcl
 resource "google_vpc_access_connector" "connector" {
   name          = "vpc-con"
-  ip_cidr_range = "10.8.0.0/28"
+  ip_cidr_range = "10.18.0.0/28"
   network       = "default"
+  min_instances  = 2
+  max_instances  = 3
 }
 ```
 <div class = "oics-button" style="float: right; margin: 0 0 -15px">
@@ -58,6 +60,8 @@ resource "google_vpc_access_connector" "connector" {
     name = google_compute_subnetwork.custom_test.name
   }
   machine_type = "e2-standard-4"
+  min_instances = 2
+  max_instances = 3
 }
 
 resource "google_compute_subnetwork" "custom_test" {
@@ -112,7 +116,7 @@ The following arguments are supported:
 
 * `max_throughput` -
   (Optional)
-  Maximum throughput of the connector in Mbps, must be greater than `min_throughput`. Default is 300.
+  Maximum throughput of the connector in Mbps, must be greater than `min_throughput`. Default is 1000.
 
 * `subnet` -
   (Optional)
@@ -160,6 +164,7 @@ This resource provides the following
 [Timeouts](https://developer.hashicorp.com/terraform/plugin/sdkv2/resources/retries-and-customizable-timeouts) configuration options:
 
 - `create` - Default is 20 minutes.
+- `update` - Default is 20 minutes.
 - `delete` - Default is 20 minutes.
 
 ## Import