Nested stacks for modularity in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a nested stack resource in AWS CloudFormation.

AWS

Resources:
  NestedStack:
    Type: [1]
    Properties:
      TemplateURL: https://s3.amazonaws.com/mybucket/mytemplate.yaml

Drag options to blanks, or click blank then click option'

AAWS::S3::Bucket

BAWS::CloudFormation::Stack

CAWS::EC2::Instance

DAWS::Lambda::Function

Attempts:

3 left

💡 Hint

Common Mistakes

Using resource types like AWS::S3::Bucket instead of AWS::CloudFormation::Stack.

Confusing nested stack with other AWS resources.

The nested stack resource type in CloudFormation is AWS::CloudFormation::Stack. This allows you to include another template inside your main template.

2fill in blank

medium

Complete the code to pass a parameter named 'EnvType' to the nested stack.

AWS

Resources:
  NestedStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://s3.amazonaws.com/mybucket/mytemplate.yaml
      Parameters:
        EnvType: [1]

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AProduction

B"Production"

CEnvType

D!Ref EnvType

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a plain string without quotes or intrinsic functions.

Using the parameter name as a string instead of referencing it.

To pass a parameter from the parent stack to the nested stack, you use !Ref EnvType to reference the parameter value defined in the parent stack.

3fill in blank

hard

Fix the error in the nested stack resource by completing the missing property key.

AWS

Resources:
  NestedStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      [1]: https://s3.amazonaws.com/mybucket/mytemplate.yaml

Drag options to blanks, or click blank then click option'

ATemplateBody

BTemplatePath

CTemplateURL

DTemplateFile

Attempts:

3 left

💡 Hint

Common Mistakes

Using TemplateBody instead of TemplateURL for external templates.

Using incorrect property names like TemplatePath or TemplateFile.

The correct property to specify the location of the nested stack template is TemplateURL. It must be a URL to the template file in S3 or another accessible location.

4fill in blank

hard

Fill both blanks to define outputs in the nested stack and reference them in the parent stack.

AWS

Resources:
  NestedStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://s3.amazonaws.com/mybucket/mytemplate.yaml
Outputs:
  NestedOutputValue:
    Value: ![1] NestedStack.[2]

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AGetAtt

BRef

COutputs

DAttributes

Attempts:

3 left

💡 Hint

Common Mistakes

Using !Ref instead of !GetAtt to access nested stack outputs.

Using wrong keys like Attributes instead of Outputs.

To get an output value from a nested stack, you use !GetAtt NestedStack.Outputs.OutputName. Here, Outputs is the key to access the nested stack's outputs.

5fill in blank

hard

Fill all three blanks to pass multiple parameters and set the timeout for the nested stack.

AWS

Resources:
  NestedStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://s3.amazonaws.com/mybucket/mytemplate.yaml
      Parameters:
        EnvType: [1]
        InstanceType: [2]
      [3]: 30

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A!Ref EnvType

B!Ref InstanceType

CTimeoutInMinutes

DTimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Using plain strings instead of !Ref for parameters.

Using incorrect timeout property names like Timeout.

To pass parameters, use !Ref to reference parent stack parameters. The timeout property for nested stacks is TimeoutInMinutes.