serverless.yml

service: sendgrid-receiver

provider:
  name: aws
  runtime: python3.8
  # Resolution of lambda version hashes was improved with better algorithm, which will be used in v3.0.0.
  # More Info: https://www.serverless.com/framework/docs/deprecations/#LAMBDA_HASHING_VERSION_V2
  lambdaHashingVersion: 20201221

  profile: ${env:SLS_PROF}
  region: ${env:SLS_REGION}
  stage: ${opt:stage}
  logRetentionInDays: 7 # CloudWatchLog
  iamRoleStatements:
    - Effect: Allow
      Action:
        - logs:CreateLogGroup
        - logs:CreateLogStream
        - logs:PutLogEvents
        - s3:PutObject
      Resource: '*'
plugins:
  #  - serverless-offline-python
  - serverless-prune-plugin # deletes old version of CloudFormation stack deployments
  - serverless-plugin-stage-variables # for apigw logging
  - serverless-python-requirements # allow pip

custom:
  prune: # retain 3 generations of CloudFormation stack configs in S3 buckets
    atuomatic: true
    number: 3
  pythonRequirements:
    dockerizePip: true

resources:
  Description: ${self:provider.stage} CloudFormation stack
  Resources:
    ApiGatewayRestApi: # setting name and description of APIGW
      Type: AWS::ApiGateway::RestApi
      Properties:
        Name: sendgrid-receiver-api
        Description: SendGrid receiver API (Lambda-proxy integration)
    ApiGatewayStage: # for apigw logging
      Type: AWS::ApiGateway::stage
      Properties:
        MethodSettings:
          - DataTraceEnabled: true
            HttpMethod: '*'
            LoggingLevel: INFO
            ResourcePath: '/*'
            MetricsEnabled: true

functions: # Lambda configuration
  'sendgrid-receiver':
    handler: lambda_function.lambda_handler
    name: sendgrid-receiver-function-${self:provider.stage}
    description: ${self:provider.stage} Lambda function
    events: # define resources one by one to save Lambda from consumption
      - http:
          path: /receive
          method: post
          cors: false
    environment:
      BUCKET_NAME: ${env:BUCKET_NAME}
      WEBHOOK_URL: ${env:WEBHOOK_URL}
      BASEPATH: ${env:BASEPATH}

package:
  patterns:
    - '!**'
    - 'lambda_function.py'
    - 'template_email_html.j2'
    - 'requirements.txt'
    - '.env'

# Starting with v3.0.0, Serverless will throw on configuration errors by default.
# More Info: https://www.serverless.com/framework/docs/deprecations/#CONFIG_VALIDATION_MODE_DEFAULT
configValidationMode: error
# just to deprecation ignore warning
useDotenv: true
# Starting with next major release, this will be communicated with a thrown error. Set "variablesResolutionMode: 20210326" in your service config, to adapt to this behavior now
# More Info: https://www.serverless.com/framework/docs/deprecations/#NEW_VARIABLES_RESOLVER
variablesResolutionMode: 20210326