zones-wildcardips.yaml

AWSTemplateFormatVersion: "2010-09-09"
Description: "Populated Route53 zone that provides wildcard dns by ip address."
# Create 4 zones in the form XX.my.zone, where XX is the hexadecimal representation
# of the 3rd IP octet. This jinja template will render into a CFn template with 4 zones
# and two A records for every hex number from 4 through 254 (*.xx and xx) in each zone 
Parameters:
  SubZones:
    Description: "List of four SubZones"
    Type: CommaDelimitedList
  IPs:
    Description: "List of IP prefixes for the 4 sub zones"
    Type: CommaDelimitedList
  ZoneName:
    Description: "Zone (domain) name"
    Type: String
  Owner:
    Description: "Owner Tag"
    Type: String
Resources:
  {% for n in range(4) -%}
  Zone{{n}}: 
    Type: "AWS::Route53::HostedZone"
    Properties: 
      Name: !Join ['.', [!Select [{{n}}, !Ref SubZones], !Ref ZoneName]]
      HostedZoneTags: 
      - Key: "Owner"
        Value: !Ref Owner
  Records{{n}}:
    Type: AWS::Route53::RecordSetGroup
    Properties:
      HostedZoneId: !Ref Zone{{n}}
      RecordSets:
      {% for i in range(4,255) -%}
      {%- for x in ['', '*.'] -%}
      - Name: !Join ['', ["{{x}}{{ '%02x' % i }}", ., !Select [{{n}}, !Ref SubZones], ., !Ref ZoneName, .]]
        Type: A
        TTL: "3600"
        ResourceRecords: [!Join ['.', [!Select [{{n}}, !Ref IPs], '{{i}}']]]
      {% endfor -%}
      {% endfor %}
  {% endfor %}