stack.yml

AWSTemplateFormatVersion: "2010-09-09"
Description: CloudFormation template to create a Lambda function that prints "Hello, World!".

Resources:
    LambdaExecutionRole:
        Type: "AWS::IAM::Role"
        Properties:
            AssumeRolePolicyDocument:
                Version: "2012-10-17"
                Statement:
                    - Effect: "Allow"
                      Principal:
                          Service:
                              - "lambda.amazonaws.com"
                      Action: "sts:AssumeRole"
            Policies:
                - PolicyName: "LambdaExecutionPolicy"
                  PolicyDocument:
                      Version: "2012-10-17"
                      Statement:
                          - Effect: "Allow"
                            Action:
                                - "logs:CreateLogGroup"
                                - "logs:CreateLogStream"
                                - "logs:PutLogEvents"
                            Resource: "arn:aws:logs:*:*:*"

    HelloWorldLambda:
        Type: "AWS::Lambda::Function"
        Properties:
            FunctionName: "HelloWorldFunction"
            Handler: "index.handler"
            Role: !GetAtt LambdaExecutionRole.Arn
            Runtime: "python3.9"
            Code:
                ZipFile: |
                    def handler(event, context):
                        print("Hello, World!")
            Timeout: 30
            MemorySize: 128

Outputs:
    LambdaFunctionName:
        Description: "Name of the Lambda function created"
        Value: !Ref HelloWorldLambda
    LambdaExecutionRoleArn:
        Description: "ARN of the Lambda execution role"
        Value: !GetAtt LambdaExecutionRole.Arn