AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Template with preference that does not require a new CodeDeploy Service
  Role

Resources:

  Function:
    Type: AWS::Serverless::Function
    Properties:
      Handler: lambda.lambda_handler
      Role:
        Fn::Sub: arn:${AWS::Partition}:iam::${AWS::AccountId}:role/lambda-role
      Runtime: python3.7
      CodeUri: s3://bucket/key
      AutoPublishAlias: live
      DeploymentPreference:
        Type: Linear10PercentEvery1Minute
        Role:
          Fn::Sub: arn:${AWS::Partition}:iam::${AWS::AccountId}:role/custom-codedeploy-servicerole
        Hooks:
          PreTraffic:
            Ref: preTrafficHook
      Events:
        Api:
          Type: Api
          Properties:
            Path: /test
            Method: get

  preTrafficHook:
    Type: AWS::Serverless::Function
    Properties:
      Handler: hook.lambda_handler
      Role:
        Fn::Sub: arn:${AWS::Partition}:iam::${AWS::AccountId}:role/lambda-role
      Runtime: python3.7
      CodeUri: s3://bucket/key
      FunctionName: CodeDeployHook_preTrafficHook
      AutoPublishAlias: live
      DeploymentPreference:
        Enabled: false
        Type: Linear10PercentEvery1Minute
      Timeout: 5
      Environment:
        Variables:
          NewVersion:
            Ref: Function.Version