AWS CDK Cross Account Route53

AWS CDK Constructs that define:

• IAM role that can be used to allow discrete Route53 Record changes
• Cross Account Record construct to create Route53 cross account Route53 records

These constructs allow you to create Route53 records where the zone exists in a separate AWS account to the Cloudformation Stack.

Getting started

yarn add cdk-cross-account-route53

First create the role in the stack for the AWS account which contains the hosted zone.

// DNS Stack
const zone = new route53.PublicHostedZone(this, 'HostedZone', {
  zoneName: 'example.com',
});

new CrossAccountRoute53Role(this, 'WebRoute53Role', {
  roleName: 'WebRoute53Role',
  assumedBy: new iam.AccountPrincipal('22222222'), // Web Stack Account
  zone,
  records: [{ domainNames: 'www.example.com' }],
 });

Then in the child stack create the records

const hostedZoneId = 'Z12345'; // ID of the zone in the other account

const distribution = new cloudfront.Distribution(this, 'Distribution', {
  domainNames: ['example.com'],
});

new CrossAccountRoute53RecordSet(this, 'ARecord', {
  delegationRoleName: 'WebRoute53Role',
  delegationRoleAccount: '111111111', // The account that contains the zone and role
  hostedZoneId,
  resourceRecordSets: [{
    Name: `example.com`,
    Type: 'A',
    AliasTarget: {
      DNSName: distribution.distributionDomainName,
      HostedZoneId: 'Z2FDTNDATAQYW2', // Cloudfront Hosted Zone Id
      EvaluateTargetHealth: false,
    },
  }],
});

If you want to use wildcard matching on domains you can choose to not autonormalise the domains and pass in a wildcard e.g.

new CrossAccountRoute53Role(this, 'WebRoute53Role', {
  roleName: 'WebRoute53Role',
  assumedBy: new iam.AccountPrincipal('22222222'), // Web Stack Account
  zone,
  records: [{ domainNames: '*.example.com' }],
  normaliseDomains: false,
 });

CrossAccountRoute53Role

Initializer

new CrossAccountRoute53Role(scope: Construct, id: string, props: CrossAccountRoute53RoleProps)

Parameters

• scope Construct
• id string
• props CrossAccountRoute53RoleProps

Construct Props

Name	Type	Description
roleName	string	The role name
assumedBy	iam.IPrincipal	The principals that are allowed to assume the role
zone	route53.IHostedZone	The hosted zone.
records	CrossAccountRoute53RolePropsRecord[]	The records that can be created by this role
normaliseDomains	boolean	Normalise the domains names as per AWS documentation (default: true)

CrossAccountRoute53RolePropsRecords

Name	Type	Description
domainNames	string | string[]	The names of the records that can be created or changed
types	route53.RecordType[]	The typepsof records that can be created. Default ['A', 'AAAA']
actions	'CREATE' | 'UPSERT' | 'DELETE'	The allowed actions. Default ['CREATE', 'UPSERT', 'DELETE']

CrossAccountRoute53RecordSet

Initializer

new CrossAccountRoute53RecordSet(scope: Construct, id: string, props: CrossAccountRoute53RecordSetProps)

Parameters

• scope Construct
• id string
• props CrossAccountRoute53RecordSet

Construct Props

Name	Type	Description
delegationRoleName	string	The role name created in the account with the hosted zone
delegationRoleAccount	string	The account identfier of the account with the hosted zone
hostedZoneId	string	The hosted zoned id
resourceRecordSets	Route53.ResourceRecordSets	The changes to be applied. These are in the same format as taken by ChangeResourceRecordSets Action

Development Status

These constructs will stay in v0.x.x for a while, to allow easier bug fixing & breaking changes if absolutely needed. Once bugs are fixed (if any), the constructs will be published with v1 major version and will be marked as stable.

Only typescript has been tested.

Development

• npm run build compile typescript to js
• npm run watch watch for changes and compile
• npm run test perform the jest unit tests