Every-Monday and Every-month cron expression doesn't work properly - amazon-web-services

Question

I've created a lambda and EventBridge stack with cloudformation, I have two lambda with exact same cloudformation template with different cron expressions, one is cron(0 8 1 * ? *) for every month 8:00Am and one is cron(0 16 ? * 2 *) for every monday 4:00Pm, but my lambda are not logging means they haven't been executed, here's the 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
Any help is more than welcome!

Answer 1

First of all, what you can do to save code is to directly use the Event property of the serverless function:
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 * ? *)
Your cron expressions look right, I am not sure what the problem is, but maybe you can try this solution and it works.