/cloudformation-refer-stacks

Demonstrate the ability to refer to cloudformation stack output of one in another stack

Goal

  • To be able to build layers of AWS infrastructure using cloudformation templates
  • Demonstrate the ability to refer to output of one stack in another.

Step 1:

  • Run LookupStackOutput.json to create a stack that creates a lambda function
aws cloudformation create-stack --stack-name "LookupStackOutput" --template-body file://$PWD/templates/LookupStackOutput.json --capabilities CAPABILITY_IAM

Step 2:

  • Run stack1.json to create a stack that creates an s3 bucket

  • Note: You will have to add output to your stack to be able to refer in another stack

aws cloudformation create-stack --stack-name  "stack1-test" --template-body file://$PWD/templates/stack1.json --parameters file://$PWD/params/stack1.json

step2

Step 3:

  • Obtain the lambda function ARN from the output stackoutput of LookupStackOutput stack you created in step 1
  • Update params/stack2.json with the name of the stack you want to refer and the lambda function ARN
  • Run stack2.json that obtains the name of the s3 bucket from stack 1 and apply policy
aws cloudformation create-stack --stack-name  "stack2-test" --template-body file://$PWD/templates/stack2.json --parameters file://$PWD/params/stack2.json

step3.1 step3.2