New serverless pattern - lambda-cloudwatch-subscription-sns-notification

[shubsmor]

This sample project demonstrates an alerting system using CloudWatch Logs Subscription filter to a Lambda function to trigger a SNS notification when the original function encounters timeout

• Currently we dont have out of box offering to alert the customer when there Lambda function encounters timeout. For time sensitive applciations Customer would like to get notification when their Lambda function is timedout",
• This pattern deploys one SNS topic with email subsciption, CloudWatch loggroup and Subscription filter,
  two Lambda functions - sample Lambda [ to demonstrate timeout ] , notification Lambda [Is triggered by CloudWatch log Subscription and publish a SNS message]

[shubsmor]

Hello Team, could you please have a look at this PR?

[biswanathmukherjee]

Hi @shubsmor ,
I see an existing similar pattern: https://serverlessland.com/patterns/cwlogs-lambda-sns-sqs-cdk

1. How is this pattern different from the above?

If there is no major difference, we may not be able to proceed with this review.

2. If there are major differences and we are ok to proceed, then also we can not club multiple patterns together. Also there are a lot of typos in the text.

[shubsmor]

Hi @biswanathmukherjee, Thanks for looking into the project and suggesting the changes.
I would like to share one the first pattern showcase the loglevel subscription filter, as you mentioned it is similar to pattern you shared. However, kindly note that my pattern came out of custom case and specifically was designed for time sensitive application.

Having said that, as per your suggestion I have removed the similar pattern from this PR. Currently this pattern implements comprehensive alerting system using account level CloudWatch subscription filter which automatically starts monitoring any existing and new loggroups without binding it to the loggroups created as part of the pattern itself like https://serverlessland.com/patterns/cwlogs-lambda-sns-sqs-cdk

Additionally, there is no pattern demonstrating account level subscription filter as well as documentation on implementing same using any IAC.

Lastly, I have also rectified typos. Could you please check again ?

[shubsmor]

I have corrected the files as suggested. Could you please have a look at this again ?

[biswanathmukherjee]

Thanks for your contribution. Approved from my side. DA will perform the next review.