route53-dns-failover.json

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "'A' record to 'Alias' record DNS failover.",
  "Parameters": {
    "PrimaryRecord": {
      "Type": "String",
      "Description": "The primary record. A standard 'A' record to an IP address.",
      "Default": "1.2.3.4"
    },
    "SecondaryRecord": {
      "Type": "String",
      "Description": "The secondary record (fallback). An alias 'A' record to a CloudFront distribution."
    },
    "DomainName": {
      "Type": "String",
      "Description": "The domain name.",
      "Default": "example.com"
    },
    "HealthCheckPath": {
      "Type": "String",
      "Description": "The URL to perform the health check against.",
      "Default": "/index.html"
    },
    "HostedZoneId": {
      "Type": "String",
      "Description": "The Route53 HostedZoneId to create these records in."
    }
  },
  "Resources": {
    "HealthCheck": {
      "Type": "AWS::Route53::HealthCheck",
      "Properties": {
        "HealthCheckConfig": {
          "FailureThreshold": 3,
          "IPAddress": {
            "Ref": "PrimaryRecord"
          },
          "FullyQualifiedDomainName": {
            "Ref": "DomainName"
          },
          "Port": 80,
          "RequestInterval": 30,
          "ResourcePath": {
            "Ref": "HealthCheckPath"
          },
          "Type": "HTTP"
        },
        "HealthCheckTags": [
          {
            "Key": "Name",
            "Value": {
              "Ref": "DomainName"
            }
          }
        ]
      }
    },
    "ThePrimaryRecord": {
      "Type": "AWS::Route53::RecordSet",
      "Properties": {
        "Failover": "PRIMARY",
        "HealthCheckId": {
          "Ref": "HealthCheck"
        },
        "HostedZoneId": {
          "Ref": "HostedZoneId"
        },
        "Name": {
          "Ref": "DomainName"
        },
        "ResourceRecords": [
          {
            "Ref": "PrimaryRecord"
          }
        ],
        "SetIdentifier": "primary-record",
        "TTL": "60",
        "Type": "A"
      }
    },
    "TheSecondaryRecord": {
      "Type": "AWS::Route53::RecordSet",
      "Properties": {
        "AliasTarget": {
          "DNSName": {
            "Ref": "SecondaryRecord"
          },
          "HostedZoneId": "Z2FDTNDATAQYW2"
        },
        "Failover": "SECONDARY",
        "HostedZoneId": {
          "Ref": "HostedZoneId"
        },
        "Name": {
          "Ref": "DomainName"
        },
        "SetIdentifier": "secondary-record",
        "Type": "A"
      }
    }
  }
}