Every-Monday 和 Every-month cron 表达式不能正常工作

如何解决Every-Monday 和 Every-month cron 表达式不能正常工作

我使用 cloudformation 创建了一个 lambda 和 EventBridge 堆栈，我有两个 lambda 与完全相同的 cloudformation 模板和不同的 cron 表达式，一个是 cron(0 8 1 * ? *)，每个月 8:00Am，一个是 cron(0 16 ? * 2 *)每个星期一下午 4:00，但我的 lambda 没有记录意味着它们还没有被执行，这里是 cloudformation template.yml：

Transform: AWS::Serverless-2016-10-31

Parameters:
  ImageUri:
    Type: String
  LambdaName: 
    Type: String
  RoleName:
    Type: String
  DatabaseHost:
    Type: String
  DatabaseUsername:
    Type: String
  DatabasePassword:
    Type: String
  DatabaseName:
    Type: String
  SQSQueueUrl:
    Type: String

  

Resources:
  LogGroup:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: !Join ['/',['/aws/lambda',!Ref LambdaName]]

  ScheduledRule:
    Type: AWS::Events::Rule
    Properties:
      Description: "Montly Collision Cronjob"
      ScheduleExpression: "cron(0 8 1 * ? *)"
      State: "ENABLED"
      Targets:
        -
          Arn:
            Fn::GetAtt:
              - LambdaFunction
              - Arn
          Id: !Join
          - ''
          - - "monthly-collision-cronjob"
            - !Ref LambdaName
  
  LambdaPermission:
      Type: "AWS::Lambda::Permission"
      Properties:
          Action: "lambda:InvokeFunction"
          FunctionName: !Join
          - ''
          - - !Sub "arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:"
            - !Ref LambdaName
          Principal: "events.amazonaws.com"
          SourceArn: !GetAtt ScheduledRule.Arn

  LambdaRole:
    Type: AWS::IAM::Role
    Properties:
      RoleName: !Ref RoleName
      AssumeRolePolicyDocument:
        Statement:
          - Action:
            - sts:AssumeRole
            Effect: Allow
            Principal:
              Service:
              - lambda.amazonaws.com
        Version: 2012-10-17
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole # For cloudwatch logging
        - arn:aws:iam::aws:policy/AmazonSQSFullAccess

  LambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: !Ref LambdaName
      PackageType: Image
      MemorySize: 256
      Timeout: 45
      ImageUri: !Ref ImageUri
      Environment:
        Variables:
          DATABASE_HOST: !Ref DatabaseHost 
          DATABASE_USERNAME: !Ref DatabaseUsername
          DATABASE_PASSWORD: !Ref DatabasePassword
          DATABASE_NAME: !Ref DatabaseName
          SQS_QUEUE_URL: !Ref SQSQueueUrl
      Role: !GetAtt
        - LambdaRole
        - Arn

欢迎任何帮助！

解决方法

首先，为了节省代码，你可以直接使用serverless函数的Event属性：

  LambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: !Ref LambdaName
      PackageType: Image
      MemorySize: 256
      Timeout: 45
      ImageUri: !Ref ImageUri
      Environment:
        Variables:
          DATABASE_HOST: !Ref DatabaseHost 
          DATABASE_USERNAME: !Ref DatabaseUsername
          DATABASE_PASSWORD: !Ref DatabasePassword
          DATABASE_NAME: !Ref DatabaseName
          SQS_QUEUE_URL: !Ref SQSQueueUrl
      Role: !GetAtt
        - LambdaRole
        - Arn
      Events:
        EveryFirstOfTheMonth:
          Type: Schedule
          Properties:
            Schedule: cron(0 8 1 * ? *)

你的 cron 表达式看起来不错，我不确定问题是什么，但也许你可以尝试这个解决方案并且它有效。