AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: An AWS Lambda application that calls the API for Performance Insights metrics in Amazon Aurora.
Parameters:
  TargetMetricNamespace:
    Type: String
    Default: /AuroraMonitoringGrafana/PerformanceInsightMetrics
    Description: Target Amazon CloudWatch namespace where you want to publish custom metrics
Resources:
  function:
    Type: AWS::Serverless::Function
    Properties:
      Handler: lambda_function.lambda_handler
      Runtime: python3.8
      CodeUri: function/.
      Description: Publish Custom Performance Insights metrics to Cloudwatch 
      Timeout: 900
      Environment:
        Variables:
          TargetMetricNamespace: !Ref TargetMetricNamespace
      Policies:
        - AWSLambdaBasicExecutionRole
        - AWSLambda_ReadOnlyAccess
        - AmazonRDSPerformanceInsightsReadOnly
        - CloudWatchAgentServerPolicy
      Tracing: Active
      Events:
        Schedule:
          Type: ScheduleV2
          Properties:
            ScheduleExpression: rate(10 minutes)
            Name: RunPIExtractorLambda
            Description: Trigger Lambda execution on a schedule
            State: ENABLED