fix(route53): vpc region in template overridden by stack region

packages/@aws-cdk/aws-ec2/lib/vpc.ts

@@ -763,6 +763,13 @@ export interface VpcAttributes {
    * VPN gateway's identifier
    */
   readonly vpnGatewayId?: string;
+
+  /**
+   * The region the VPC is in
+   *
+   * @default - The region of the stack where the VPC belongs to
+   */
+  readonly region?: string;
 }
 
 export interface SubnetAttributes {
@@ -1203,7 +1210,12 @@ export class Vpc extends VpcBase {
       dummyValue: undefined,
     }).value;
 
-    return new LookedUpVpc(scope, id, attributes || DUMMY_VPC_PROPS, attributes === undefined);
+    const lookedUpVpcProps = {
+      ...attributes,
+      region: options.region,
+    };
+
+    return new LookedUpVpc(scope, id, attributes ? lookedUpVpcProps : DUMMY_VPC_PROPS, attributes === undefined);
 
     /**
      * Prefixes all keys in the argument with `tag:`.`
@@ -2008,7 +2020,9 @@ class ImportedVpc extends VpcBase {
   private readonly cidr?: string | undefined;
 
   constructor(scope: Construct, id: string, props: VpcAttributes, isIncomplete: boolean) {
-    super(scope, id);
+    super(scope, id, {
+      region: props.region,
+    });
 
     this.vpcId = props.vpcId;
     this.vpcArn = Arn.format({
@@ -2058,7 +2072,9 @@ class LookedUpVpc extends VpcBase {
   private readonly cidr?: string | undefined;
 
   constructor(scope: Construct, id: string, props: cxapi.VpcContextResponse, isIncomplete: boolean) {
-    super(scope, id);
+    super(scope, id, {
+      region: props.region,
+    });
 
     this.vpcId = props.vpcId;
     this.vpcArn = Arn.format({

packages/@aws-cdk/aws-ec2/test/integ.vpc-lookup.ts

@@ -0,0 +1,48 @@
+import * as cdk from '@aws-cdk/core';
+import { IntegTest } from '@aws-cdk/integ-tests';
+import * as ec2 from '../lib';
+
+const appWithVpc = new cdk.App();
+const stack = new cdk.Stack(appWithVpc, 'StackWithVpc', {
+  env: {
+    region: 'eu-west-1',
+    account: '123456',
+  },
+});
+
+const testVpc = new ec2.Vpc(stack, 'MyVpc', {
+  vpcName: 'my-vpc-name',
+});
+
+const appUnderTest = new cdk.App();
+const stackLookup = new cdk.Stack(appUnderTest, 'StackUnderTest', {
+  env: {
+    region: 'us-east-2',
+    account: '123456',
+  },
+});
+
+const vpcFromVpcAttributes = ec2.Vpc.fromVpcAttributes(stackLookup, 'VpcFromVpcAttributes', {
+  region: 'eu-west-1',
+  availabilityZones: ['eu-west-1a'],
+  vpcId: testVpc.vpcId,
+});
+
+const vpcFromLookup = ec2.Vpc.fromLookup(stack, 'VpcFromLookup', {
+  region: 'eu-west-1',
+  vpcName: 'my-vpc-name',
+});
+
+new cdk.CfnOutput(stackLookup, 'OutputFromVpcAttributes', {
+  value: `Region fromVpcAttributes: ${vpcFromVpcAttributes.env.region}`,
+});
+
+new cdk.CfnOutput(stackLookup, 'OutputFromLookup', {
+  value: `Region fromLookup: ${vpcFromLookup.env.region}`,
+});
+
+new IntegTest(appUnderTest, 'ArchiveTest', {
+  testCases: [stackLookup],
+});
+appWithVpc.synth();
+appUnderTest.synth();

packages/@aws-cdk/aws-ec2/test/vpc-lookup.integ.snapshot/ArchiveTestDefaultTestDeployAssert3405726A.template.json

@@ -0,0 +1 @@
+{}

packages/@aws-cdk/aws-ec2/test/vpc-lookup.integ.snapshot/StackUnderTest.template.json

@@ -0,0 +1,10 @@
+{
+ "Outputs": {
+  "OutputFromVpcAttributes": {
+   "Value": "Region fromVpcAttributes: eu-west-1"
+  },
+  "OutputFromLookup": {
+   "Value": "Region fromLookup: eu-west-1"
+  }
+ }
+}