Serverless Lambda

Serverless service which shows how one can chain Lambdas through SNS. The configuration which triggers the chain mechanims is defined on serverless.yml.

Installation

Make sure that you use Serverless v1.

1. Next up cd into the service with cd serverless-sns
2. Run npm install
3. Search your accountId with: aws sts get-caller-identity
4. Replace the accountId in the .env file with your AWS account id
5. Deploy with serverless deploy

Test

1. Run serverless invoke -f firstLambda to trigger the chaining process (this will call a lamnda function secondLambda who publish a message to the SNS topic called dispatcher the thirdLambda will listen to)
2. Run serverless logs -f firstLambda -t to see that the message which was send to the dispatcher topic successfully triggered the secondLambda function
3. Run serverless logs -f secondLambda -t to see that the message which was send to the dispatcher topic successfully triggered the secondLambda function
4. Run serverless logs -f thirdLambda -t to see that the message which was send to the dispatcher topic successfully triggered the thirdLambda function

AWS services used

• Lambda
• SNS

References

https://serverless.com/framework/docs/providers/aws/events/sns/#sns