Feat: Add min_instances to cloudfunctions functions (#5513) (#10712)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/5513.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+cloudfunctions: added support for `min_instances` to `google_cloudfunctions_function`
+```

google/resource_cloudfunctions_function.go

@@ -293,6 +293,13 @@ func resourceCloudFunctionsFunction() *schema.Resource {
 				Description:  `The limit on the maximum number of function instances that may coexist at a given time.`,
 			},
 
+			"min_instances": {
+				Type:         schema.TypeInt,
+				Optional:     true,
+				ValidateFunc: validation.IntAtLeast(0),
+				Description:  `The limit on the minimum number of function instances that may coexist at a given time.`,
+			},
+
 			"project": {
 				Type:        schema.TypeString,
 				Optional:    true,
@@ -409,6 +416,10 @@ func resourceCloudFunctionsCreate(d *schema.ResourceData, meta interface{}) erro
 		function.MaxInstances = int64(v.(int))
 	}
 
+	if v, ok := d.GetOk("min_instances"); ok {
+		function.MinInstances = int64(v.(int))
+	}
+
 	log.Printf("[DEBUG] Creating cloud function: %s", function.Name)
 
 	// We retry the whole create-and-wait because Cloud Functions
@@ -527,6 +538,9 @@ func resourceCloudFunctionsRead(d *schema.ResourceData, meta interface{}) error
 	if err := d.Set("max_instances", function.MaxInstances); err != nil {
 		return fmt.Errorf("Error setting max_instances: %s", err)
 	}
+	if err := d.Set("min_instances", function.MinInstances); err != nil {
+		return fmt.Errorf("Error setting min_instances: %s", err)
+	}
 	if err := d.Set("region", cloudFuncId.Region); err != nil {
 		return fmt.Errorf("Error setting region: %s", err)
 	}
@@ -641,6 +655,11 @@ func resourceCloudFunctionsUpdate(d *schema.ResourceData, meta interface{}) erro
 		updateMaskArr = append(updateMaskArr, "maxInstances")
 	}
 
+	if d.HasChange("min_instances") {
+		function.MinInstances = int64(d.Get("min_instances").(int))
+		updateMaskArr = append(updateMaskArr, "minInstances")
+	}
+
 	if len(updateMaskArr) > 0 {
 		log.Printf("[DEBUG] Send Patch CloudFunction Configuration request: %#v", function)
 		updateMask := strings.Join(updateMaskArr, ",")

google/resource_cloudfunctions_function_test.go

@@ -145,6 +145,8 @@ func TestAccCloudFunctionsFunction_basic(t *testing.T) {
 						"available_memory_mb", "128"),
 					resource.TestCheckResourceAttr(funcResourceName,
 						"max_instances", "10"),
+					resource.TestCheckResourceAttr(funcResourceName,
+						"min_instances", "3"),
 					resource.TestCheckResourceAttr(funcResourceName,
 						"ingress_settings", "ALLOW_INTERNAL_ONLY"),
 					testAccCloudFunctionsFunctionSource(fmt.Sprintf("gs://%s/index.zip", bucketName), &function),
@@ -215,6 +217,8 @@ func TestAccCloudFunctionsFunction_update(t *testing.T) {
 						"timeout", "91"),
 					resource.TestCheckResourceAttr(funcResourceName,
 						"max_instances", "15"),
+					resource.TestCheckResourceAttr(funcResourceName,
+						"min_instances", "5"),
 					resource.TestCheckResourceAttr(funcResourceName,
 						"ingress_settings", "ALLOW_ALL"),
 					testAccCloudFunctionsFunctionHasLabel("my-label", "my-updated-label-value", &function),
@@ -623,6 +627,7 @@ resource "google_cloudfunctions_function" "function" {
     TEST_ENV_VARIABLE = "test-build-env-variable-value"
   }
   max_instances = 10
+  min_instances = 3
 }
 `, bucketName, zipFilePath, functionName)
 }
@@ -664,6 +669,7 @@ resource "google_cloudfunctions_function" "function" {
     NEW_ENV_VARIABLE  = "new-build-env-variable-value"
   }
   max_instances = 15
+  min_instances = 5
 }
 `, bucketName, zipFilePath, functionName)
 }
@@ -903,6 +909,7 @@ resource "google_cloudfunctions_function" "function" {
 	TEST_ENV_VARIABLE = "test-env-variable-value"
   }
   max_instances = 10
+  min_instances = 3
   vpc_connector = google_vpc_access_connector.%s.self_link
   vpc_connector_egress_settings = "PRIVATE_RANGES_ONLY"
 

website/docs/r/cloudfunctions_function.html.markdown

@@ -150,6 +150,8 @@ Eg. `"nodejs10"`, `"nodejs12"`, `"nodejs14"`, `"python37"`, `"python38"`, `"pyth
 
 * `max_instances` - (Optional) The limit on the maximum number of function instances that may coexist at a given time.
 
+* `min_instances` - (Optional) The limit on the minimum number of function instances that may coexist at a given time.
+
 <a name="nested_event_trigger"></a>The `event_trigger` block supports:
 
 * `event_type` - (Required) The type of event to observe. For example: `"google.storage.object.finalize"`.