CircuitBreakerManager stack example

AWSTemplateFormatVersion: '2010-09-09'
Transform:
  - AWS::LanguageExtensions
  - AWS::Serverless-2016-10-31
Description: SAM Template for CbEventSourceManager

Parameters:
  Project:
    Type: String
  ProjectGroup:
    Type: String
  Environment:
    Type: String
  TracingName:
    Type: String
  CircuitBreakerAlarmArn:
    Description: Alarm that is base for the circuit breaker
    Type: String
  ManagedFunctionArn:
    Description: SQS Consumer Function ARN
    Type: String
  ManagedQueueArn:
    Description: Consumed SQS ARN
    Type: String
  ConsumerClosedConcurrency:
    Description: Closed concurrency for the consumer
    Type: Number

Mappings:
  Properties:
    DEV:
      loggingLevel: 'debug'
    SIT:
      loggingLevel: 'info'
    UAT:
      loggingLevel: 'info'
    OAT:
      loggingLevel: 'info'
    PROD:
      loggingLevel: 'info'

Resources:
  FunctionLogGroup:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: !Sub
        - '/aws/lambda/${LambdaName}'
        - { LambdaName: !Ref CbEventSourceManagerFunction }
      RetentionInDays: 14

  CbEventSourceManagerFunction:
    # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ..
      Handler: bootstrap
      Runtime: provided.al2
      AutoPublishAlias: live
      AutoPublishAliasAllProperties: true
      Architectures:
        - arm64
      Tracing: Active
      FunctionName: CB-ESM-MANAGER
      Timeout: 10
      MemorySize: 128
      Environment:
        Variables:
          LOG_LEVEL: !FindInMap [ Properties, !Ref Environment, loggingLevel ]
          APPLICATION: cb-esm-manager
          PROJECT: !Ref Project
          PROJECT_GROUP: !Ref ProjectGroup
          ATTRIBUTES_PREFIX: cb-esm-manager
          VERSION: 'N/A'
          OPENTELEMETRY_COLLECTOR_CONFIG_FILE:
            !Sub
            - '{{resolve:ssm:${ConfigLocation}}}'
            - ConfigLocation:
                Fn::ImportValue: OTEL::CollectorConfig::S3Location
          OPENTELEMETRY_EXTENSION_LOG_LEVEL: warn
          OTEL_SERVICE_NAME: !Ref TracingName
          FUNCTION_ARN: !Ref ManagedFunctionArn
          QUEUE_ARN: !Ref ManagedQueueArn
          CLOSED_CONCURRENCY: !Ref ConsumerClosedConcurrency
      Events:
        OpenCircuitRule:
          Type: EventBridgeRule
          Properties:
            Pattern:
              source:
                - "aws.cloudwatch"
              detail-type:
                - "CloudWatch Alarm State Change"
              resources:
                - !Ref CircuitBreakerAlarmArn
      Layers:
        - !Sub arn:aws:lambda:${AWS::Region}:184161586896:layer:opentelemetry-collector-arm64-0_5_0:1
      Policies:
        - Fn::ImportValue: OTEL::CollectorConfig::AccessPolicy
        - Fn::ImportValue: OTEL::CollectorConfig::DisableXRayReportingPolicy
        - Statement:
            - Sid: ListEventSourceMappings
              Effect: Allow
              Action:
                - lambda:listEventSourceMappings
              Resource: "*"
            - Sid: UpdateEventSourceMapping
              Effect: Allow
              Action:
                - lambda:UpdateEventSourceMapping
              Resource: !Sub arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:event-source-mapping:*
      Tags:
        Name: CB-ESM-MANAGER
    Metadata:
      BuildMethod: makefile