An example of defining a CloudWatch scheduled event as an event for an AWS Lambda in the serverless framework by using a CloudFront template for resources

serverless_lambda_cloudwatch_event.yml

functions:
  MyLambdaFunction:
    role: MyLambdaRole
    handler: index.handle
resources:
  Resources:
    MyEventName:
      Type: AWS::Events::Rule
      Properties:
        Description: An awesome periodic event
        Name: MyEventName
        ScheduleExpression: "cron(0 6 * * ? *)"
        State: ENABLED
        RoleArn:
          Fn::GetAtt:
            - "MyLambdaRole"
            - "Arn"
        Targets:
          -
            Arn:
              Fn::GetAtt:
                - "MyLambdaFunction"
                - "Arn"
            Id: "MyLambdaFunction"
            Input: '{"key": "value"}'
    MyLambdaRole:
      Type: AWS::IAM::Role
      Properties:
        Path: /my_uservices/
        RoleName: MyLambdaRole
        AssumeRolePolicyDocument:
          Version: '2012-10-17'
          Statement:
            - Effect: Allow
              Principal:
                Service:
                  - lambda.amazonaws.com
                  - events.amazonaws.com
              Action: sts:AssumeRole
        Policies:
          - PolicyName: MyLambdaPolicy
            PolicyDocument:
              Version: '2012-10-17'
              Statement:
                - Effect: Allow
                  Action:
                    - logs:CreateLogGroup
                    - logs:CreateLogStream
                    - logs:PutLogEvents
                  Resource: "arn:aws:logs:*:*:log-group:/aws/lambda/*:*:*"