When you initiate a stack update, AWS CloudFormation updates resources based on differences between what you submit and the stack's current template and parameters. If you update a resource property that requires that the resource be replaced, AWS CloudFormation recreates the resource during the update. Recreating the resource generates a new physical ID.
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Wednesday, 30 January 2019
Thursday, 10 January 2019
Cloudformation nested stacks
The AWS::CloudFormation::Stack type nests a stack as a resource in a top-level template.https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-stack.html
You can add output values from a nested stack within the containing template. You use the GetAtt function with the nested stack's logical name and the name of the output value in the nested stack in the format Outputs.NestedStackOutputName.
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