Add data source for AppHub discovered workload

mmv1/third_party/terraform/provider/provider_mmv1_resources.go.erb

@@ -27,6 +27,7 @@ var handwrittenDatasources = map[string]*schema.Resource{
 	"google_alloydb_locations":                         alloydb.DataSourceAlloydbLocations(),
 	"google_alloydb_supported_database_flags":          alloydb.DataSourceAlloydbSupportedDatabaseFlags(),
 	"google_artifact_registry_repository":              artifactregistry.DataSourceArtifactRegistryRepository(),
+	"google_apphub_discovered_workload":		    apphub.DataSourceApphubDiscoveredWorkload(),
 	"google_app_engine_default_service_account":        appengine.DataSourceGoogleAppEngineDefaultServiceAccount(),
 	<% unless version == 'ga' -%>
 	"google_backup_dr_management_server":				backupdr.DataSourceGoogleCloudBackupDRService(),

mmv1/third_party/terraform/services/apphub/data_source_apphub_discovered_workload.go

@@ -0,0 +1,204 @@
+package apphub
+
+import (
+    "fmt"
+    "log"
+
+    "github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+    "github.com/hashicorp/terraform-provider-google/google/tpgresource"
+    transport_tpg "github.com/hashicorp/terraform-provider-google/google/transport"
+    "google.golang.org/api/googleapi"
+)
+
+func DataSourceApphubDiscoveredWorkload() *schema.Resource {
+    return &schema.Resource{
+        Read: dataSourceApphubDiscoveredWorkloadRead,
+        Schema: map[string]*schema.Schema{
+        		"project":{
+        		    Type: schema.TypeString,
+        		    Optional: true,
+        		 },
+                        "location":{
+                            Type: schema.TypeString,
+                            Required: true,
+                        },
+                        "workload_uri": {
+                            Type: schema.TypeString,
+                            Required: true,
+                        },
+                        "discovered_workload": {
+                                Type:     schema.TypeList,
+                                Computed: true,
+                                Elem: &schema.Resource{
+                                        Schema: map[string]*schema.Schema{
+                                                "name": {
+                                                        Type:     schema.TypeString,
+                                                        Computed: true,
+                                                },
+                                                "workload_reference": {
+                                                        Type:     schema.TypeList,
+                                                        Computed: true,
+                                                        Elem: &schema.Resource{
+                                                            Schema: map[string]*schema.Schema{
+                                                                "uri":{
+                                                                    Type: schema.TypeString,
+                                                                    Computed: true,
+                                                                },
+                                                            },
+                                                        },
+                                                },
+                                                "workload_properties": {
+                                                        Type:     schema.TypeList,
+                                                        Computed: true,
+                                                        Elem: &schema.Resource{
+                                                            Schema: map[string]*schema.Schema{
+                                                                "gcp_project":{
+                                                                    Type: schema.TypeString,
+                                                                    Computed: true,
+                                                                },
+                                                                "location":{
+                                                                    Type: schema.TypeString,
+                                                                    Computed: true,
+                                                                },
+                                                                "zone":{
+                                                                    Type: schema.TypeString,
+                                                                    Computed: true,
+                                                                },
+                                                            },
+                                                        },        
+                                                },
+                                        },
+                                },
+                        },
+        },
+    }
+}
+
+func dataSourceApphubDiscoveredWorkloadRead(d *schema.ResourceData, meta interface{}) error {
+        config := meta.(*transport_tpg.Config)
+        userAgent, err := tpgresource.GenerateUserAgentString(d, config.UserAgent)
+        if err != nil {
+                return err
+        }
+
+        url, err := tpgresource.ReplaceVars(d, config, "{{ApphubBasePath}}projects/{{project}}/locations/{{location}}/discoveredWorkloads:lookup?uri={{workload_uri}}")
+        if err != nil {
+                return err
+        }
+
+        billingProject := ""
+
+        // err == nil indicates that the billing_project value was found
+        if bp, err := tpgresource.GetBillingProject(d, config); err == nil {
+            	billingProject = bp
+        }
+
+        var res map[string]interface{}
+
+        err = transport_tpg.Retry(transport_tpg.RetryOptions{
+		RetryFunc: func() (rerr error) {
+			res, rerr = transport_tpg.SendRequest(transport_tpg.SendRequestOptions{
+				Config:    config,
+				Method:    "GET",
+				Project:   billingProject,
+				RawURL:    url,
+				UserAgent: userAgent,
+			})
+			return rerr
+		},
+		Timeout: d.Timeout(schema.TimeoutRead),
+		ErrorRetryPredicates: []transport_tpg.RetryErrorPredicateFunc{
+			func(err error) (bool, string) {
+				gerr, ok := err.(*googleapi.Error)
+				if !ok {
+					return false, ""
+				}
+
+				if gerr.Code == 404 {
+					log.Printf("[DEBUG] Dismissed an error as retryable based on error code: %s", err)
+					return true, fmt.Sprintf("Retryable error code %d", gerr.Code)
+				}
+				return false, ""
+			},
+		},
+	})
+
+        if err != nil {
+            return transport_tpg.HandleDataSourceNotFoundError(err, d, fmt.Sprintf("ApphubDiscoveredWorkload %q", d.Id()), url)
+        }
+
+        if err := d.Set("discovered_workload", flattenApphubDiscoveredWorkload(res["discoveredWorkload"], d, config)); err != nil {
+                return fmt.Errorf("Error setting discovered workload: %s", err)
+        }
+
+        d.SetId(res["discoveredWorkload"].(map[string]interface{})["name"].(string))
+
+        return nil
+
+}
+
+func flattenApphubDiscoveredWorkload(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        if v == nil {
+                return nil
+        }
+        original := v.(map[string]interface{})
+        if len(original) == 0 {
+                return nil
+        }
+
+        transformed := make(map[string]interface{})
+        transformed["name"] = flattenApphubDiscoveredWorkloadDataName(original["name"], d, config)
+        transformed["workload_reference"] =  flattenApphubWorkloadReference(original["workloadReference"], d, config)
+        transformed["workload_properties"] = flattenApphubWorkloadProperties(original["workloadProperties"], d, config)
+        return []interface{}{transformed}
+}
+
+
+func flattenApphubWorkloadReference(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        if v == nil {
+                return nil
+        }
+        original := v.(map[string]interface{})
+        if len(original) == 0 {
+                return nil
+        }
+        transformed := make(map[string]interface{})
+        transformed["uri"] = flattenApphubDiscoveredWorkloadDataUri(original["uri"], d, config)
+        return []interface{}{transformed}
+}
+
+func flattenApphubWorkloadProperties(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        if v == nil {
+                return nil
+        }
+        original := v.(map[string]interface{})
+        if len(original) == 0 {
+                return nil
+        }
+        transformed := make(map[string]interface{})
+        transformed["gcp_project"] = flattenApphubDiscoveredWorkloadDataGcpProject(original["gcpProject"], d, config)
+        transformed["location"] = flattenApphubDiscoveredWorkloadDataLocation(original["location"], d, config)
+        transformed["zone"] = flattenApphubDiscoveredWorkloadDataZone(original["zone"], d, config)
+        return []interface{}{transformed}
+}
+
+func flattenApphubDiscoveredWorkloadDataName(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        return v
+}
+
+func flattenApphubDiscoveredWorkloadDataUri(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        return v
+}
+
+func flattenApphubDiscoveredWorkloadDataGcpProject(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        return v
+}
+
+func flattenApphubDiscoveredWorkloadDataLocation(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        return v
+}
+
+func flattenApphubDiscoveredWorkloadDataZone(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+        return v
+}
+

mmv1/third_party/terraform/services/apphub/data_source_apphub_discovered_workload_test.go

@@ -0,0 +1,112 @@
+package apphub_test
+
+import (
+    "testing"
+
+    "github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+    "github.com/hashicorp/terraform-provider-google/google/acctest"
+)
+
+func TestAccDataSourceApphubDiscoveredWorkload_basic(t *testing.T) {
+    t.Parallel()
+
+    context := map[string]interface{}{
+    	"random_suffix": acctest.RandString(t, 10),
+    }
+
+    acctest.VcrTest(t, resource.TestCase{
+        PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+        ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+        Steps: []resource.TestStep{
+            {
+                Config: testDataSourceApphubDiscoveredWorkload_basic(context),
+            },
+        },
+    })
+}
+
+func testDataSourceApphubDiscoveredWorkload_basic(context map[string]interface{}) string {
+    return acctest.Nprintf(`
+data "google_apphub_discovered_workload" "catalog-workload" {
+  provider = google
+  location = "us-central1"
+  workload_uri = "${replace(google_compute_region_instance_group_manager.mig.instance_group, "https://www.googleapis.com/compute/v1", "//compute.googleapis.com")}"
+  depends_on = [google_compute_region_instance_group_manager.mig]
+}
+
+# VPC network
+resource "google_compute_network" "ilb_network" {
+  name                    = "l7-ilb-network-%{random_suffix}"
+  project                 = "tf-project-5-416803"
+  auto_create_subnetworks = false
+}
+
+# backend subnet
+resource "google_compute_subnetwork" "ilb_subnet" {
+  name          = "l7-ilb-subnetwork-%{random_suffix}"
+  project       = "tf-project-5-416803"
+  ip_cidr_range = "10.0.1.0/24"
+  region        = "us-central1"
+  network       = google_compute_network.ilb_network.id
+  depends_on = [google_compute_network.ilb_network]
+}
+
+# instance template
+resource "google_compute_instance_template" "instance_template" {
+  name         = "l7-ilb-mig-template-%{random_suffix}"
+  project               = "tf-project-5-416803"
+  machine_type = "e2-small"
+  tags         = ["http-server"]
+  network_interface {
+    network    = google_compute_network.ilb_network.id
+    subnetwork = google_compute_subnetwork.ilb_subnet.id
+    access_config {
+      # add external ip to fetch packages
+    }
+  }
+  disk {
+    source_image = "debian-cloud/debian-10"
+    auto_delete  = true
+    boot         = true
+  }
+  # install nginx and serve a simple web page
+  metadata = {
+    startup-script = <<-EOF1
+      #! /bin/bash
+      set -euo pipefail
+      export DEBIAN_FRONTEND=noninteractive
+      apt-get update
+      apt-get install -y nginx-light jq
+      NAME=$(curl -H "Metadata-Flavor: Google" "http://metadata.google.internal/computeMetadata/v1/instance/hostname")
+      IP=$(curl -H "Metadata-Flavor: Google" "http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ip")
+      METADATA=$(curl -f -H "Metadata-Flavor: Google" "http://metadata.google.internal/computeMetadata/v1/instance/attributes/?recursive=True" | jq 'del(.["startup-script"])')
+      cat <<EOF > /var/www/html/index.html
+      <pre>
+      Name: $NAME
+      IP: $IP
+      Metadata: $METADATA
+      </pre>
+      EOF
+    EOF1
+  }
+  lifecycle {
+    create_before_destroy = true
+  }
+  depends_on = [google_compute_subnetwork.ilb_subnet, google_compute_network.ilb_network]
+}
+
+resource "google_compute_region_instance_group_manager" "mig" {
+  name     = "l7-ilb-mig1-%{random_suffix}"
+  project               = "tf-project-5-416803"
+  region   = "us-central1"
+  version {
+    instance_template = google_compute_instance_template.instance_template.id
+    name              = "primary"
+  }
+  base_instance_name = "vm"
+  target_size        = 2
+  depends_on = [google_compute_instance_template.instance_template]
+}
+`, context)
+}
+

mmv1/third_party/terraform/website/docs/d/apphub_discovered_workload.html.markdown

@@ -0,0 +1,56 @@
+---
+subcategory: "Apphub"
+description: |-
+  Get information about a discovered workload.
+---
+
+# google\_apphub\_discovered_workload
+
+Get information about a discovered workload from its uri.
+
+
+## Example Usage
+
+
+```hcl
+data "google_apphub_discovered_workload" "my-workload" {
+  location = "my-location"
+  workload_uri = "my-workload-uri"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `project` - The host project of the discovered workload.
+* `workload_uri` - (Required) The uri of the workload.
+* `location` - (Required) The location of the discovered workload.
+
+## Attributes Reference
+
+In addition to the arguments listed above, the following computed attributes are exported:
+
+* `discovered_workload` - Represents a network/api interface that exposes some functionality to clients for consumption over the network. Structure is [documented below](#nested_discovered_workloads)
+
+<a name="nested_discovered_workloads"></a>A `discovered_workload` object would contain the following fields:-
+
+* `name` - Resource name of a Workload. Format: "projects/{host-project-id}/locations/{location}/applications/{application-id}/workloads/{workload-id}".
+
+* `workload_reference` - Reference to an underlying networking resource that can comprise a Workload. Structure is [documented below](#nested_workload_reference)
+
+<a name="nested_workload_reference"></a>A `workload_reference` object would contain the following fields:-
+
+* uri - The underlying resource URI.
+
+* path - Additional path under the resource URI.
+
+* `workload_properties` - Properties of an underlying compute resource that can comprise a Workload. Structure is [documented below](#nested_workload_properties)
+
+<a name="nested_workload_properties"></a>A `workload_properties` object would contain the following fields:-
+
+* gcp_project - The service project identifier that the underlying cloud resource resides in.
+
+* location - The location that the underlying resource resides in.
+
+* zone - The location that the underlying resource resides in if it is zonal.