向现有CloudFormation堆栈添加资源

Question

I have a CloudFormation master stack. I want to write a tool that allows me to add Lambda functions to the master stack using Boto3.

In order to add the function to the stack I need to be able to

• Get Outputs from the master stack to use in the function's template.

• Add the Function to the master stack.

I have only been able to get this to work with:

• Build, zip, and upload the function to S3

• Add the function's template to the master stack's templates. (requires editing the master stack's files)

• Deploy the master stack.

I would like to be able to create the function without editing the master stack's files.

(ie boto3.get_stack_id -> boto3.add_resource_to_stack_by_stack_id )

Is this possible? If so, how do I do it?

Answer 1

No that is not possible. When updating a stack, you always have to provide a URL for the new stack template, or provide the full template body as a string, or use the previous template.

Source: https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_UpdateStack.html

There is no API call that allows you to directly add a resource to a stack.