12. Testing CloudFormation

How to run CloudFormation

• For this example, we’ll assume your CloudFormation file name is called testcfn.yml, and you’re giving your stack the name myfirsttest.

• In the terminal, to use your yml code to request the resources, type the following in the same directory as your yml file:

aws cloudformation create-stack 
--stack-name myfirsttest 
--region us-west-2 
--template-body testcfn.yml

• You may also want to use update-stack when you want to update an existing stack instead of destroying your stack and creating a new one.