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.Route 53 cross account alias records

May 31st 2021-2 min read

As you already know, a multi-account AWS environment enables you to use the cloud to move faster and build differentiated products and services, all while ensuring you do so in secure, scalable and resilient manner. Therefore, you set up AWS Organizations in your main account, created several core accounts for security, logging and other centralized services and deployed your applications into different workload accounts. You probably also created your main Route 53 Hosted Zone in one of the core accounts. But what do you do, if someone wants you to add a record there, which points to their CloudFront distribution or Elastic Load Balancer.

CNAME

Just create a CNAME record, which points to the domain name.

CloudFormation

Resources:
Record:
      Type: AWS::Route53::RecordSet
      Properties:
      HostedZoneId : GLOBALDATANET
      Name: aws.globaldatanet.com.
      ResourceRecords:
  - '1234567890.eu-central-1.elb.amazonaws.com'
      TTL: '3600'
      Type: CNAME

Terraform

resource "aws_route53_record" "aws" {
  name    = "aws"
  records = [
    "1234567890.eu-central-1.elb.amazonaws.com"
  ]
  ttl     = 3600
  type    = "CNAME"
  zone_id = "GLOBALDATANET"
}

Alias

A CNAME record works great as long as you don't want to add a record to your domain apex. In this case you can leverage the AWS provided alias records, and they even work cross account 🚀.

Architecture

CloudFormation

Resources:
  Record:
    Type: AWS::Route53::RecordSet
    Properties:
      AliasTarget:
        HostedZoneId: Z2FDTNDATAQYW2  # <-- this is the well-known Hosted Zone ID of CloudFront
        DNSName: 1234567890.cloudfront.net.
      HostedZoneId : GLOBALDATANET
      Name: globaldatanet.com.
      Type: A

Terraform

resource "aws_route53_record" "apex" {
  name    = "globaldatanet.com"
  type    = "A"
  zone_id = "GLOBALDATANET"

  alias {
    name    = "1234567890.cloudfront.net"
    zone_id = "Z2FDTNDATAQYW2"  # <-- this is the well-known Hosted Zone ID of CloudFront
  }
}
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