master.yaml

AWSTemplateFormatVersion: "2010-09-09"
Description: Master stack to create nested stack with resources to deploy serverless application.
Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      -
        Label:
          default: Lambda function parameters
        Parameters:
          - LambdaFunctionName
          - LambdaHandler
          - LambdaRuntime
          - LambdaCodeS3Bucket
          - LambdaCodeS3Key
      -
        Label:
          default: Nested Stack
        Parameters:
          - TemplateURLDynamoDB
          - TemplateURLambda
          - TemplateURLApiGateway
      -
        Label:
          default: DynamoDB table name.
          Parameters:
            - DynamoDBTableName

Parameters:

  TemplateURLDynamoDB:
    Default: https://s3.amazonaws.com/mybucket/path/to/dynamodb.yml
    Description: The DynamoDB stack template. Location of an object in Amazon S3.
    Type: String

  TemplateURLambda:
    Default: https://s3.amazonaws.com/mybucket/path/to/lambda.yml
    Description: The lambda function stack template. Location of an object in Amazon S3.
    Type: String

  TemplateURLApiGateway:
    Default: https://s3.amazonaws.com/mybucket/path/to/apigateway.yml
    Description: The API Gateway stack template. Location of an object in Amazon S3.
    Type: String

  DynamoDBTableName:
    Default: Customer
    Description: Name of the DynamoDB table.
    MinLength: 3
    MaxLength: 255
    Type: String

  LambdaFunctionName:
    ConstraintDescription: must contain only alphanumeric characters.
    Default: CustomerServerless
    Description: The name of the Lambda function.
    MaxLength: 64
    MinLength: 1
    Type: String

  LambdaHandler:
    Default: com.aws.lambda.customer.StreamLambdaHandler::handleRequest
    Description: Package, class and the name of the method within your code that Lambda calls to execute your function.
    MaxLength: 128
    MinLength: 1
    Type: String

  LambdaRuntime:
    Default: java8
    AllowedValues:
      - java8
      - java11
      - dotnetcore2.1
      - dotnetcore3.1
      - go1.x
      - java11
      - java8
      - nodejs10.x
      - nodejs12.x
      - provided
      - python2.7
      - python3.6
      - python3.7
      - python3.8
      - ruby2.5
      - ruby2.7
    Description: Lambda runtime to deploy application.
    Type: String

  LambdaCodeS3Bucket:
    Default: mybucket
    Description: The deployment package for a Lambda function. Location of an object in Amazon S3.
    Type: String

  LambdaCodeS3Key:
    Default: Customer-0.0.1.zip
    Description: The deployment package for a Lambda function. Name of the object in Amazon S3.
    Type: String

Resources:

  dynamodb:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Ref TemplateURLDynamoDB
      Parameters:
        DynamoDBTableName: !Ref DynamoDBTableName

  lambda:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Ref TemplateURLambda
      Parameters:
        LambdaFunctionName: !Ref LambdaFunctionName
        LambdaHandler: !Ref LambdaHandler
        LambdaRuntime: !Ref LambdaRuntime
        LambdaCodeS3Bucket: !Ref LambdaCodeS3Bucket
        LambdaCodeS3Key: !Ref LambdaCodeS3Key
        LambdaDynamoDBTableARN: !GetAtt dynamodb.Outputs.DynamoDBTableArn
    DependsOn: dynamodb

  apigateway:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Ref TemplateURLApiGateway
      Parameters:
        LambdaFunctionName: !Ref LambdaFunctionName
        LambdaFunctionArn: !GetAtt lambda.Outputs.LambdaFunctionArn
    DependsOn: lambda