Update google_compute_router_interface import, acctest, docs

.changelog/7758.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: fixed an import bug for `google_compute_router_interface` that happened when project was not set in the provider configuration or via environment variable
+```

google/resource_compute_router_interface.go

@@ -366,19 +366,35 @@ func resourceComputeRouterInterfaceDelete(d *schema.ResourceData, meta interface
 
 func resourceComputeRouterInterfaceImportState(d *schema.ResourceData, meta interface{}) ([]*schema.ResourceData, error) {
 	parts := strings.Split(d.Id(), "/")
-	if len(parts) != 3 {
-		return nil, fmt.Errorf("Invalid router interface specifier. Expecting {region}/{router}/{interface}")
-	}
-
-	if err := d.Set("region", parts[0]); err != nil {
-		return nil, fmt.Errorf("Error setting region: %s", err)
-	}
-	if err := d.Set("router", parts[1]); err != nil {
-		return nil, fmt.Errorf("Error setting router: %s", err)
-	}
-	if err := d.Set("name", parts[2]); err != nil {
-		return nil, fmt.Errorf("Error setting name: %s", err)
+	switch len(parts) {
+	case 3:
+		// {{region}}/{{router}}/{{name}} import id
+		if err := d.Set("region", parts[0]); err != nil {
+			return nil, fmt.Errorf("error setting region: %s", err)
+		}
+		if err := d.Set("router", parts[1]); err != nil {
+			return nil, fmt.Errorf("error setting router: %s", err)
+		}
+		if err := d.Set("name", parts[2]); err != nil {
+			return nil, fmt.Errorf("error setting name: %s", err)
+		}
+		return []*schema.ResourceData{d}, nil
+	case 4:
+		// {{project}}/{{region}}/{{router}}/{{name}} import id
+		if err := d.Set("project", parts[0]); err != nil {
+			return nil, fmt.Errorf("error setting project: %s", err)
+		}
+		if err := d.Set("region", parts[1]); err != nil {
+			return nil, fmt.Errorf("error setting region: %s", err)
+		}
+		if err := d.Set("router", parts[2]); err != nil {
+			return nil, fmt.Errorf("error setting router: %s", err)
+		}
+		if err := d.Set("name", parts[3]); err != nil {
+			return nil, fmt.Errorf("error setting name: %s", err)
+		}
+		return []*schema.ResourceData{d}, nil
 	}
 
-	return []*schema.ResourceData{d}, nil
+	return nil, fmt.Errorf("invalid router interface specifier. Expecting either {region}/{router}/{interface} or {project}/{region}/{router}/{interface} import id format")
 }

google/resource_compute_router_interface_test.go

@@ -11,24 +11,36 @@ import (
 func TestAccComputeRouterInterface_basic(t *testing.T) {
 	t.Parallel()
 
-	routerName := fmt.Sprintf("tf-test-router-%s", RandString(t, 10))
+	name := fmt.Sprintf("tf-test-router-%s", RandString(t, 10))
+	context := map[string]interface{}{
+		"name":   name,
+		"region": "us-central1",
+	}
+	importIdFourPart := fmt.Sprintf("%s/%s/%s/%s", GetTestProjectFromEnv(), context["region"], context["name"], context["name"]) // name reused in config
+
 	VcrTest(t, resource.TestCase{
 		PreCheck:                 func() { AccTestPreCheck(t) },
 		ProtoV5ProviderFactories: ProtoV5ProviderFactories(t),
 		CheckDestroy:             testAccCheckComputeRouterInterfaceDestroyProducer(t),
 		Steps: []resource.TestStep{
 			{
-				Config: testAccComputeRouterInterfaceBasic(routerName),
+				Config: testAccComputeRouterInterfaceBasic(context),
 				Check: testAccCheckComputeRouterInterfaceExists(
 					t, "google_compute_router_interface.foobar"),
 			},
+			{
+				ResourceName:      "google_compute_router_interface.foobar",
+				ImportState:       true, // Will use the 3 part {{region}}/{{router}}/{{name}} import id by default as it's the id in state
+				ImportStateVerify: true,
+			},
 			{
 				ResourceName:      "google_compute_router_interface.foobar",
 				ImportState:       true,
+				ImportStateId:     importIdFourPart, // Make test step use 4 part {{project}}/{{region}}/{{router}}/{{name}} import id
 				ImportStateVerify: true,
 			},
 			{
-				Config: testAccComputeRouterInterfaceKeepRouter(routerName),
+				Config: testAccComputeRouterInterfaceKeepRouter(name),
 				Check: testAccCheckComputeRouterInterfaceDelete(
 					t, "google_compute_router_interface.foobar"),
 			},
@@ -227,40 +239,40 @@ func testAccCheckComputeRouterInterfaceExists(t *testing.T, n string) resource.T
 	}
 }
 
-func testAccComputeRouterInterfaceBasic(routerName string) string {
-	return fmt.Sprintf(`
+func testAccComputeRouterInterfaceBasic(context map[string]interface{}) string {
+	return Nprintf(`
 resource "google_compute_network" "foobar" {
-  name = "%s-net"
+  name = "%{name}-net"
 }
 
 resource "google_compute_subnetwork" "foobar" {
-  name          = "%s-subnet"
+  name          = "%{name}-subnet"
   network       = google_compute_network.foobar.self_link
   ip_cidr_range = "10.0.0.0/16"
-  region        = "us-central1"
+  region        = "%{region}"
 }
 
 resource "google_compute_address" "foobar" {
-  name   = "%s-addr"
+  name   = "%{name}-addr"
   region = google_compute_subnetwork.foobar.region
 }
 
 resource "google_compute_vpn_gateway" "foobar" {
-  name    = "%s-gateway"
+  name    = "%{name}-gateway"
   network = google_compute_network.foobar.self_link
   region  = google_compute_subnetwork.foobar.region
 }
 
 resource "google_compute_forwarding_rule" "foobar_esp" {
-  name        = "%s-fr1"
+  name        = "%{name}-fr1"
   region      = google_compute_vpn_gateway.foobar.region
   ip_protocol = "ESP"
   ip_address  = google_compute_address.foobar.address
   target      = google_compute_vpn_gateway.foobar.self_link
 }
 
 resource "google_compute_forwarding_rule" "foobar_udp500" {
-  name        = "%s-fr2"
+  name        = "%{name}-fr2"
   region      = google_compute_forwarding_rule.foobar_esp.region
   ip_protocol = "UDP"
   port_range  = "500-500"
@@ -269,7 +281,7 @@ resource "google_compute_forwarding_rule" "foobar_udp500" {
 }
 
 resource "google_compute_forwarding_rule" "foobar_udp4500" {
-  name        = "%s-fr3"
+  name        = "%{name}-fr3"
   region      = google_compute_forwarding_rule.foobar_udp500.region
   ip_protocol = "UDP"
   port_range  = "4500-4500"
@@ -278,7 +290,7 @@ resource "google_compute_forwarding_rule" "foobar_udp4500" {
 }
 
 resource "google_compute_router" "foobar" {
-  name    = "%s"
+  name    = "%{name}"
   region  = google_compute_forwarding_rule.foobar_udp500.region
   network = google_compute_network.foobar.self_link
   bgp {
@@ -287,12 +299,12 @@ resource "google_compute_router" "foobar" {
 }
 
 resource "google_compute_router_interface" "foobar" {
-  name     = "%s"
+  name     = "%{name}"
   router   = google_compute_router.foobar.name
   region   = google_compute_router.foobar.region
   ip_range = "169.254.3.1/30"
 }
-`, routerName, routerName, routerName, routerName, routerName, routerName, routerName, routerName, routerName)
+`, context)
 }
 
 func testAccComputeRouterInterfaceRedundant(routerName string) string {

website/docs/r/compute_router_interface.html.markdown

@@ -82,8 +82,9 @@ This resource provides the following
 
 ## Import
 
-Router interfaces can be imported using the `region`, `router`, and `name`, e.g.
+Router interfaces can be imported using the `project` (optional), `region`, `router`, and `name`, e.g.
 
 ```
+$ terraform import google_compute_router_interface.foobar my-project/us-central1/router-1/interface-1
 $ terraform import google_compute_router_interface.foobar us-central1/router-1/interface-1
 ```