AWS Serverless template resource count exceeds

Question

I have just started migrating all my Web APIs to AWS serverless functions using VS2015 dot net core. I have total 60 resources(AWS::Serverless::Function) defined in serverless.template file. When I started uploading it through Visual Studio (Publish to AWS Lamda), I got below error.

Failed to create CloudFormation change set: Template format error: Number of resources, 267, is greater than maximum allowed, 200

I tried deleting some resources but same error comes repeatedly. Initially when I do it by just having 2,3 resources, it was working just fine.

Any help would be highly appreciated.

Edit: Below is new master template referring nested stack

{
    "AWSTemplateFormatVersion" : "2010-09-09",
    "Transform" : "AWS::Serverless-2016-10-31",
    "Resources" : {
        "FirstStack" : {
           "Type" : "AWS::CloudFormation::Stack",
           "Properties" : {
              "TemplateURL" : "https://s3-us-west-2.amazonaws.com/serverless1.template",
              "TimeoutInMinutes" : "60"
           }          
        },
        "SecondStack" : {
           "Type" : "AWS::CloudFormation::Stack",
           "Properties" : {
              "TemplateURL" : "https://s3-us-west-2.amazonaws.com/serverless2.template",
              "TimeoutInMinutes" : "60"
           }          
        }
    },    
    "Outputs": {

    }    
}

Answer 1

If you look at Cloudformation Limits you'll see that 200 Resources is the max per template. Their recommendation is to use Nested Stacks.

Answer 2

AWS Changes Posted On:

• Oct 22, 2020

AWS Changes Posted At:

• https://aws.amazon.com/about-aws/whats-new/2020/10/aws-cloudformation-now-supports-increased-limits-on-five-service-quotas/

5 Increased Cloudformation Limits

• maximum size of a template that can be passed in an S3 Object

  • 1MB
  • previously 450KB

• per template limits for the maximum number of resources

  • 500
  • previously 200

• parameters

  • 200
  • previously 60

• mappings

  • 200
  • previously 100

• outputs

  • 200
  • previously 60