如何在Cloudformation中使用Route53创建动态数量的子域？

Question

I need to create a dynamic number of subdomains depending on how many instances I want to create. my goal id to create something like

• customer-code-100.example.com

• customer-code-101.example.com

• customer-code-102.example.com

• customer-code-103.example.com

I've researched, but there doesn't seem to be a solution. I need to be able to run Puppet on multiple hosts, but they each need a different domain.

Ideally, I want to be able to use autoscaling or some sort of dynamic way to accomplish this, but I haven't been able to find any answers.

MyRecordSet: 
   Type: AWS::Route53::RecordSet
   Properties: 
     HostedZoneName: example.com.
     Name: !Join[".", [!Ref Alias, "example.com"]]
     Type: A

Answer 1

The easier method is to have the instances register themselves with Amazon Route 53 . This can be done with a startup script that uses the AWS CLI to register a domain name.

Admittedly, it can be hard to decide which number to assign an instance, especially if Auto Scaling is being used. For example:

• If Instance 1 and Instance 2 exist, obviously the next is Instance 3
• But if Instance 2 is terminated by Auto Scaling and only Instance 1 and Instance 3 exist, should the next instance be Instance 2 or Instance 4 ?

Or, use part of the Instance ID to generate the name.

Then there is the problem of "unregistering" a subdomain when the instance is terminated.

Actually, there should normally be no need to assign a subdomain to an Auto Scaling instance . This is because traffic is normally routed through a Load Balancer, or the instances are pulling work from a queue. There should be no need to uniquely address a specific instance.