AWS Cloudformation stack - best practices

Question

Hello Team.

I am starting with cloudformation to create aws resources, so I would like to have some recommendations and best practices according your experience.

When I create cloudformation stacks to create resources, I understand these stacks must keep forever? or if I delete the stack, all my resources will be deleted?
Is it possible to update some parameters in the stack? and this will delete the current resource and create new resource with new parameters?

Thank you.

Answer

Hello.

The parameters you update may replace the resource.  
As described in the document below, if the parameter type is "Replacement", if you update it, it will be replaced with a new resource.  
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html

If you want to keep the resources even if you delete the CloudFormation stack, the resources will be retained by creating it with "DeletionPolicy" set to "Retain".  
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html

AWS Cloudformation stack - best practices

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