Add MTU to interconnect

.changelog/4496.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: added `mtu` field to `google_compute_interconnect_attachment`
+```

google-beta/resource_compute_interconnect_attachment.go

@@ -143,6 +143,13 @@ domain. If not specified, the value will default to AVAILABILITY_DOMAIN_ANY.`,
 				Description: `URL of the underlying Interconnect object that this attachment's
 traffic will traverse through. Required if type is DEDICATED, must not
 be set if type is PARTNER.`,
+			},
+			"mtu": {
+				Type:     schema.TypeString,
+				Computed: true,
+				Optional: true,
+				Description: `Maximum Transmission Unit (MTU), in bytes, of packets passing through
+this interconnect attachment. Currently, only 1440 and 1500 are allowed. If not specified, the value will default to 1440.`,
 			},
 			"region": {
 				Type:             schema.TypeString,
@@ -267,6 +274,12 @@ func resourceComputeInterconnectAttachmentCreate(d *schema.ResourceData, meta in
 	} else if v, ok := d.GetOkExists("description"); !isEmptyValue(reflect.ValueOf(descriptionProp)) && (ok || !reflect.DeepEqual(v, descriptionProp)) {
 		obj["description"] = descriptionProp
 	}
+	mtuProp, err := expandComputeInterconnectAttachmentMtu(d.Get("mtu"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("mtu"); !isEmptyValue(reflect.ValueOf(mtuProp)) && (ok || !reflect.DeepEqual(v, mtuProp)) {
+		obj["mtu"] = mtuProp
+	}
 	bandwidthProp, err := expandComputeInterconnectAttachmentBandwidth(d.Get("bandwidth"), d, config)
 	if err != nil {
 		return err
@@ -415,6 +428,9 @@ func resourceComputeInterconnectAttachmentRead(d *schema.ResourceData, meta inte
 	if err := d.Set("description", flattenComputeInterconnectAttachmentDescription(res["description"], d, config)); err != nil {
 		return fmt.Errorf("Error reading InterconnectAttachment: %s", err)
 	}
+	if err := d.Set("mtu", flattenComputeInterconnectAttachmentMtu(res["mtu"], d, config)); err != nil {
+		return fmt.Errorf("Error reading InterconnectAttachment: %s", err)
+	}
 	if err := d.Set("bandwidth", flattenComputeInterconnectAttachmentBandwidth(res["bandwidth"], d, config)); err != nil {
 		return fmt.Errorf("Error reading InterconnectAttachment: %s", err)
 	}
@@ -489,6 +505,12 @@ func resourceComputeInterconnectAttachmentUpdate(d *schema.ResourceData, meta in
 	} else if v, ok := d.GetOkExists("description"); !isEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, descriptionProp)) {
 		obj["description"] = descriptionProp
 	}
+	mtuProp, err := expandComputeInterconnectAttachmentMtu(d.Get("mtu"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("mtu"); !isEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, mtuProp)) {
+		obj["mtu"] = mtuProp
+	}
 	bandwidthProp, err := expandComputeInterconnectAttachmentBandwidth(d.Get("bandwidth"), d, config)
 	if err != nil {
 		return err
@@ -622,6 +644,10 @@ func flattenComputeInterconnectAttachmentDescription(v interface{}, d *schema.Re
 	return v
 }
 
+func flattenComputeInterconnectAttachmentMtu(v interface{}, d *schema.ResourceData, config *Config) interface{} {
+	return v
+}
+
 func flattenComputeInterconnectAttachmentBandwidth(v interface{}, d *schema.ResourceData, config *Config) interface{} {
 	return v
 }
@@ -731,6 +757,10 @@ func expandComputeInterconnectAttachmentDescription(v interface{}, d TerraformRe
 	return v, nil
 }
 
+func expandComputeInterconnectAttachmentMtu(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	return v, nil
+}
+
 func expandComputeInterconnectAttachmentBandwidth(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
 	return v, nil
 }

website/docs/r/compute_interconnect_attachment.html.markdown

@@ -35,6 +35,7 @@ resource "google_compute_interconnect_attachment" "on_prem" {
   name         = "on-prem-attachment"
   interconnect = "my-interconnect-id"
   router       = google_compute_router.foobar.id
+  mtu          = 1500
 }
 
 resource "google_compute_router" "foobar" {
@@ -83,6 +84,11 @@ The following arguments are supported:
   (Optional)
   An optional description of this resource.
 
+* `mtu` -
+  (Optional)
+  Maximum Transmission Unit (MTU), in bytes, of packets passing through
+  this interconnect attachment. Currently, only 1440 and 1500 are allowed. If not specified, the value will default to 1440.
+
 * `bandwidth` -
   (Optional)
   Provisioned bandwidth capacity for the interconnect attachment.