aws-sam-application-template-python/template.yaml at main · claranet-ch/aws-sam-application-template-python · GitHub

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AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  How to organize, test, log and trace an AWS SAM application written in Python

Parameters:
  Environment:
    Default: staging
    Type: String
  PostsBucketName:
    Default: posts
    Type: String
  PostsMetaTableName:
    Default: posts-meta
    Type: String
  Project:
    Default: aws-sam-application-template-python
    Type: String

# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Runtime: python3.9
    Tags:
      Environment: !Ref Environment
      Project: !Ref Project
    Timeout: 3
    Tracing: Active # X-Ray tracing mode: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-function.html#sam-function-tracing

Resources:
  #region --------------------------------------------------------------- Layers
  #
  # https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/building-layers.html#building-applications-examples

  LayerRequests:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName: !Sub "${Project}-${Environment}-layer-requests"
      ContentUri: layers/layer_requests/
      CompatibleRuntimes:
        - python3.9
    Metadata:
      BuildMethod: python3.9 # Required to have AWS SAM build this layer

  LayerXRay:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName: !Sub "${Project}-${Environment}-layer-x-ray"
      ContentUri: layers/layer_x_ray/
      CompatibleRuntimes:
        - python3.9
    Metadata:
      BuildMethod: python3.9 # Required to have AWS SAM build this layer

  #endregion -------------------------------------------------------------------

  #region ---------------------------------------------------------- API Gateway

  RestApiGateway:
    Type: AWS::Serverless::Api
    Properties:
      Cors: "'*'"
      GatewayResponses:
        DEFAULT_4XX:
          ResponseParameters:
            Headers:
              Access-Control-Allow-Origin: "'*'"
              Access-Control-Allow-Headers: "'*'"
              Access-Control-Allow-Methods: "'*'"
        DEFAULT_5XX:
          ResponseParameters:
            Headers:
              Access-Control-Allow-Origin: "'*'"
              Access-Control-Allow-Headers: "'*'"
              Access-Control-Allow-Methods: "'*'"
      MinimumCompressionSize: 0 # compression enabled
      StageName: !Sub "${Environment}"

  #endregion -------------------------------------------------------------------

  #region -------------------------------------------------------------- Lambdas

  PostsGetFunction:
    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:
      CodeUri: functions/posts_get/
      Environment:
        Variables:
          BUCKET_POSTS: !Sub "${Project}-${Environment}-${PostsBucketName}"
          TABLE_POSTS: !Sub "${Project}-${Environment}-${PostsMetaTableName}"
      FunctionName: !Sub "${Project}-${Environment}-posts-get"
      Handler: handler.posts_get
      Layers:
        - !Ref LayerRequests
        - !Ref LayerXRay
      Events:
        ApiEvent:
          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: /posts
            Method: get
            RestApiId:
              Ref: RestApiGateway
      Policies:
        - DynamoDBReadPolicy:
            TableName:
              !Sub "${Project}-${Environment}-${PostsMetaTableName}"
        - S3ReadPolicy:
            BucketName:
              !Sub "${Project}-${Environment}-${PostsBucketName}"

  #endregion -------------------------------------------------------------------

  #region ----------------------------------------------------------- S3 Buckets

  PostsBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Sub "${Project}-${Environment}-${PostsBucketName}"

  #endregion -------------------------------------------------------------------

  #region ------------------------------------------------------ DynamoDB Tables

  PostsMetaTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: !Sub "${Project}-${Environment}-${PostsMetaTableName}"
      AttributeDefinitions:
        - AttributeName: id
          AttributeType: S
      KeySchema:
        - AttributeName: id
          KeyType: HASH
      BillingMode: PAY_PER_REQUEST
      # TimeToLiveSpecification:
      #   AttributeName: ttl
      #   Enabled: true

  #endregion -------------------------------------------------------------------

Outputs:
  ApiEndpoint:
    Description: "Posts API"
    Value: !Sub "https://${RestApiGateway}.execute-api.${AWS::Region}.amazonaws.com/${Environment}/"
  RestApiId:
    Value: !Ref RestApiGateway