feat(ec2-alpha): nested ipam pool #

packages/@aws-cdk/aws-ec2-alpha/lib/ipam.ts

@@ -144,6 +144,12 @@ export interface PoolOptions {
    * @default - autogenerated by CDK if not provided
    */
   readonly ipamPoolName?: string;
+
+  /**
+   * The ID of the source IPAM pool. Use this option to create a pool within an existing pool.
+   * @default - Pool is created at the top level.
+   */
+  readonly sourceIpamPoolId?: string;
 }
 
 const NAME_TAG: string = 'Name';
@@ -359,6 +365,7 @@ class IpamPool extends Resource implements IIpamPool {
       ipamScopeId: props.ipamScopeId,
       publicIpSource: props.publicIpSource,
       awsService: props.awsService,
+      sourceIpamPoolId: props.sourceIpamPoolId,
     });
     this.ipamPoolId = this._ipamPool.attrIpamPoolId;
 
@@ -594,5 +601,6 @@ function createIpamPool(
     locale: poolOptions.locale,
     publicIpSource: poolOptions.publicIpSource,
     awsService: poolOptions.awsService,
+    sourceIpamPoolId: poolOptions.sourceIpamPoolId,
   });
 }

packages/@aws-cdk/aws-ec2-alpha/test/ipam.test.ts

@@ -77,6 +77,27 @@ describe('IPAM Test', () => {
     ); // End Template
   });
 
+  test('Creates nested IP Pools', () => {
+    const pool = ipam.privateScope.addPool('Private', {
+      addressFamily: vpc.AddressFamily.IP_V4,
+      ipv4ProvisionedCidrs: ['10.2.0.0/14'],
+      locale: 'us-west-2',
+    });
+    ipam.privateScope.addPool('PrivateChild', {
+      addressFamily: vpc.AddressFamily.IP_V4,
+      ipv4ProvisionedCidrs: ['10.2.0.0/16'],
+      sourceIpamPoolId: pool.ipamPoolId,
+    });
+
+    Template.fromStack(stack).hasResourceProperties(
+      'AWS::EC2::IPAMPool',
+      {
+        AddressFamily: 'ipv4',
+        SourceIpamPoolId: { 'Fn::GetAtt': ['IpamPrivate4E8D7A02', 'IpamPoolId'] },
+      },
+    );
+  });
+
   test('Creates IPAM CIDR pool under public scope for IPv6', () => {
     // Create IPAM resources
     const ipamIpv6 = new Ipam(stack, 'TestIpam', {