Route53 Alias Record Targets for the CDK Route53 Library

---

AWS CDK v1 has reached End-of-Support on 2023-06-01. This package is no longer being updated, and users should migrate to AWS CDK v2.

For more information on how to migrate, see the Migrating to AWS CDK v2 guide.

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This library contains Route53 Alias Record targets for:

• API Gateway custom domains

  import aws_cdk.aws_apigateway as apigw
  
  # zone: route53.HostedZone
  # rest_api: apigw.LambdaRestApi
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.ApiGateway(rest_api))
  )
  

• API Gateway V2 custom domains

  import aws_cdk.aws_apigatewayv2 as apigwv2
  
  # zone: route53.HostedZone
  # domain_name: apigwv2.DomainName
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.ApiGatewayv2DomainProperties(domain_name.regional_domain_name, domain_name.regional_hosted_zone_id))
  )
  

• CloudFront distributions

  import aws_cdk.aws_cloudfront as cloudfront
  
  # zone: route53.HostedZone
  # distribution: cloudfront.CloudFrontWebDistribution
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.CloudFrontTarget(distribution))
  )
  

• ELBv2 load balancers

  import aws_cdk.aws_elasticloadbalancingv2 as elbv2
  
  # zone: route53.HostedZone
  # lb: elbv2.ApplicationLoadBalancer
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.LoadBalancerTarget(lb))
  )
  

• Classic load balancers

  import aws_cdk.aws_elasticloadbalancing as elb
  
  # zone: route53.HostedZone
  # lb: elb.LoadBalancer
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.ClassicLoadBalancerTarget(lb))
  )
  

Important: Based on AWS documentation, all alias record in Route 53 that points to a Elastic Load Balancer will always include dualstack for the DNSName to resolve IPv4/IPv6 addresses (without dualstack IPv6 will not resolve).

For example, if the Amazon-provided DNS for the load balancer is ALB-xxxxxxx.us-west-2.elb.amazonaws.com, CDK will create alias target in Route 53 will be dualstack.ALB-xxxxxxx.us-west-2.elb.amazonaws.com.

• GlobalAccelerator

  import aws_cdk.aws_globalaccelerator as globalaccelerator
  
  # zone: route53.HostedZone
  # accelerator: globalaccelerator.Accelerator
  
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.GlobalAcceleratorTarget(accelerator))
  )
  

Important: If you use GlobalAcceleratorDomainTarget, passing a string rather than an instance of IAccelerator, ensure that the string is a valid domain name of an existing Global Accelerator instance. See the documentation on DNS addressing with Global Accelerator for more info.

• InterfaceVpcEndpoints

Important: Based on the CFN docs for VPCEndpoints - see here - the attributes returned for DnsEntries in CloudFormation is a combination of the hosted zone ID and the DNS name. The entries are ordered as follows: regional public DNS, zonal public DNS, private DNS, and wildcard DNS. This order is not enforced for AWS Marketplace services, and therefore this CDK construct is ONLY guaranteed to work with non-marketplace services.

import aws_cdk.aws_ec2 as ec2

# zone: route53.HostedZone
# interface_vpc_endpoint: ec2.InterfaceVpcEndpoint


route53.ARecord(self, "AliasRecord",
    zone=zone,
    target=route53.RecordTarget.from_alias(targets.InterfaceVpcEndpointTarget(interface_vpc_endpoint))
)

• S3 Bucket Website:

Important: The Bucket name must strictly match the full DNS name. See the Developer Guide for more info.

import aws_cdk.aws_s3 as s3


record_name = "www"
domain_name = "example.com"

bucket_website = s3.Bucket(self, "BucketWebsite",
    bucket_name=[record_name, domain_name].join("."),  # www.example.com
    public_read_access=True,
    website_index_document="index.html"
)

zone = route53.HostedZone.from_lookup(self, "Zone", domain_name=domain_name) # example.com

route53.ARecord(self, "AliasRecord",
    zone=zone,
    record_name=record_name,  # www
    target=route53.RecordTarget.from_alias(targets.BucketWebsiteTarget(bucket_website))
)

• User pool domain

  import aws_cdk.aws_cognito as cognito
  
  # zone: route53.HostedZone
  # domain: cognito.UserPoolDomain
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.UserPoolDomainTarget(domain))
  )
  

• Route 53 record

  # zone: route53.HostedZone
  # record: route53.ARecord
  
  route53.ARecord(self, "AliasRecord",
      zone=zone,
      target=route53.RecordTarget.from_alias(targets.Route53RecordTarget(record))
  )
  

• Elastic Beanstalk environment:

Important: Only supports Elastic Beanstalk environments created after 2016 that have a regional endpoint.

# zone: route53.HostedZone
# ebs_environment_url: str


route53.ARecord(self, "AliasRecord",
    zone=zone,
    target=route53.RecordTarget.from_alias(targets.ElasticBeanstalkEnvironmentEndpointTarget(ebs_environment_url))
)

See the documentation of @aws-cdk/aws-route53 for more information.