serverless - not able to trigger aws lambda using cloudwatch event - amazon-web-services

Question

Currently my serverless.yml file looks like this:
service: bbb
provider:
name: aws
runtime: go1.x
stage: dev
package:
exclude:
- ./**
include:
- ./bin/**
functions:
ccc:
handler: bin/executable
name: my1minutelambda
role:
'Fn::GetAtt':
- mylambdaexecutionrole
- Arn
resources:
Resources:
mylambdaexecutionrole:
Type: AWS::IAM::Role
Properties:
RoleName: my-basiclambdaexec-role
Description: This is my basiclambdaexecution role
AssumeRolePolicyDocument:
Version: "2012-10-17"
Statement:
-
Effect: Allow
Principal:
Service:
- "lambda.amazonaws.com"
Action:
- "sts:AssumeRole"
ManagedPolicyArns:
- "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
myminschedulerevent:
Type: AWS::Events::Rule
Properties:
Description: This is my 1 minute rate scheduler.
Name: my-1-min-trigger-event-scheduler
ScheduleExpression: rate(1 hour)
Targets:
-
Arn: "arn:aws:lambda:us-east-1:111111111111:function:my1minutelambda" #update your a/c Id
Id: "TargetFunctionV1"
command used to deploy: sls deploy
After deployment finished, I can see on aws management console that all my resources got created.
BUT I am not able to see cloudwatch trigger extablishment for my lambda function.
See below screenshot:
CloudWatch Event Rule created successfully. (Target section pointing to my lambda function)
Trigger link not established for my lambda:
Please let me know what i am missing here. Thank you.
Update#1:
After adding following lines (as suggested by Marcin), I am able to see "CloudWatch event".
EventsPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: my1minutelambda
Action: lambda:InvokeFunction
Principal: events.amazonaws.com
SourceAccount: !Ref 'AWS::AccountId'
SourceArn: !GetAtt myminschedulerevent.Arn
But, I can't see CloudWatch logs!! So, I can't findout if my lambda function is executing. Please see image below:

Answer 1

I tried to replicate the issue using serverless framework.
To do so I added the following AWS::Lambda::Permission to the end of your template:
EventsPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: dsfgsdfg # <-- REPLACE this with your function name my1minutelambda
Action: lambda:InvokeFunction
Principal: events.amazonaws.com
SourceArn: !GetAtt myminschedulrevent.Arn
After adding the permissions, the console showed the trigger as expected:

Answer 2

If all you are trying to do is get a Lambda function to execute on a schedule, the Serverless Framework already includes an event type expressly for that purpose:
functions:
crawl:
handler: crawl
events:
- schedule: rate(2 hours)
- schedule: cron(0 12 * * ? *)
It will set everything up for you with no need to add additional CloudFormation. You can find the documentation here: https://www.serverless.com/framework/docs/providers/aws/events/schedule/#schedule/

Answer 3

ScheduledRule:
Type: AWS::Events::Rule
Properties:
Name: "SphEvent"
Description: "ScheduledRule"
ScheduleExpression: "rate(1 hour)"
State: "ENABLED"
Targets:
- Arn: !Sub "arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:lambda-name"
Id: "TargetFunctionV1"
PermissionForEventsToInvokeLambda:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !Ref "LambdaFunction"
Action: "lambda:InvokeFunction"
Principal: "events.amazonaws.com"
SourceArn:
Fn::GetAtt:
- "ScheduledRule"
- "Arn"