template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  python3.9

  Sample SAM Template for serverless-arch-example

Parameters:
  Environment:
    Type: String
    Description: AWS Environment where code is being executed (AWS_SAM_LOCAL or AWS)
    Default: 'AWS'

  DynamoDBUri:
    Type: String
    Description: AWS local DynamoDB instance URI (will only be used if AWSENVNAME is AWS_SAM_LOCAL)
    Default: 'http://docker.for.mac.host.internal:8000'
  
  ProjectName:
    Type: String
    Description: 'Name of the project'
    Default: 'serverless-arch-example'

# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 120
    MemorySize: 2048 
    EphemeralStorage:
      Size: 3072
    Environment:
      Variables:
        ENVIRONMENT: !Ref Environment
        DYNAMODB_DEV_URI: !Ref DynamoDBUri
        ORDERS_TABLE_NAME: !Ref OrdersTable
        SQS_QUEUE: !Ref OrdersQueue
        UPLOAD_BUCKET: !Ref OrdersBucket

Resources:
  OrdersBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Join ['-', [!Sub '${ProjectName}', 'csvs']]
      LifecycleConfiguration:
        Rules:
          - Id: DeleteContentAfterADay
            ExpirationInDays: 1
            Status: Enabled
      CorsConfiguration:
        CorsRules:
        - AllowedHeaders:
            - "*"
          AllowedMethods:
            - GET
            - PUT
            - POST
            - DELETE
            - HEAD
          AllowedOrigins:
            - "*"
  OrdersTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: !Join ['-', [!Sub '${ProjectName}', 'orders']]
      AttributeDefinitions:
        - AttributeName: request_id
          AttributeType: S        
      KeySchema:
        - AttributeName: request_id
          KeyType: HASH     
      ProvisionedThroughput:
        ReadCapacityUnits: 3
        WriteCapacityUnits: 3
  OrdersQueue:
    Type: AWS::SQS::Queue
    Properties:
      QueueName: !Join ['-', [!Sub '${ProjectName}', 'orders']]
      VisibilityTimeout: 120  # must be same as lambda timeout

  CreateFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      PackageType: Image
      ImageConfig:
        Command:
          - create.lambda_handler
      Architectures:
        - x86_64
      Events:
        CreateAPI:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /example/create
            Method: post
      Policies:
        - AmazonDynamoDBFullAccess
        - SQSSendMessagePolicy:
            QueueName: !GetAtt OrdersQueue.QueueName
    Metadata:
      Dockerfile: Dockerfile
      DockerContext: ./src
      DockerTag: python3.9-v1
  
  ProcessFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: !Join ['-', [!Sub '${ProjectName}', 'process']]
      PackageType: Image
      ImageConfig:
        Command:
          - process.lambda_handler
      Architectures:
        - x86_64
      Policies:
        - AmazonDynamoDBFullAccess
        - S3CrudPolicy:
            BucketName: !Ref OrdersBucket
      Events:
        SqsEvent:
          Type: SQS
          Properties:
            Queue: !GetAtt OrdersQueue.Arn
            BatchSize: 1
    Metadata:
      Dockerfile: Dockerfile
      DockerContext: ./src
      DockerTag: python3.9-v1
  GetStatusFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      FunctionName: !Join ['-', [!Sub '${ProjectName}', 'get-status']]
      PackageType: Image
      ImageConfig:
        Command:
          - get_status.lambda_handler
      Architectures:
        - x86_64
      Policies:
        - AmazonDynamoDBFullAccess
        - S3WritePolicy:
            BucketName: !Ref OrdersBucket
        - S3ReadPolicy:
            BucketName: !Ref OrdersBucket
      Events:
        GetStatusAPI:
          Type: Api
          Properties:
            Path: /example/get-status
            Method: get
    Metadata:
      Dockerfile: Dockerfile
      DockerContext: ./src
      DockerTag: python3.9-v1

Outputs:
  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  CreateAPI:
    Description: "API Gateway endpoint URL for Prod stage for Create function"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/example/create"
  CreateFunction:
    Description: "Create Lambda Function ARN"
    Value: !GetAtt CreateFunction.Arn
  CreateFunctionIamRole:
    Description: "Implicit IAM Role created for Create function"
    Value: !GetAtt CreateFunctionRole.Arn
  OrdersTable:
    Description: "DynamoDB Table for orders"
    Value: !GetAtt OrdersTable.Arn
  OrdersQueue:
    Description: "SQS Queue for orders"
    Value: !GetAtt OrdersQueue.Arn
  ProcessFunction:
    Description: "Process Lambda Function ARN"
    Value: !GetAtt ProcessFunction.Arn
  OrdersBucket:
    Description: "S3 bucket for Orders"
    Value: !GetAtt OrdersBucket.Arn
  GetStatus:
    Description: "API Gateway endpoint URL for Prod stage for Get Status function"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/example/get-status"
  GetStatusFunction:
    Description: "Get Status Lambda Function ARN"
    Value: !GetAtt GetStatusFunction.Arn
  GetStatusFunctionIamRole:
    Description: "Implicit IAM Role created for Get Status function"
    Value: !GetAtt GetStatusFunctionRole.Arn