AWS Lambda :: Part 2

USE-CASE :: Cost optimisation

This use case if used to check if you have any stale Snapshot in your AWS account and delete it . So that Python script checks the which volume and snapshot is present and then, if that snapshot is attached to any volume , if that then Lambda function delete that

Link for the python script

https://github.com/ApurvDevops/AWS/tree/master/cost-optimzation

Steps

1. Create EC2 Instance

Associated Volume

1. Take a Snapshot of the Volume associated with EC2 Instance

1. Create a Lambda Function and add the required IAM Roles ( DescribeInstance, DescribeSnapshot, Deletesnapshot,DescribeVolume )

Failed because of Insufficient permission

Added the Policies as mentioned on above steps DescribeInstance, DescribeSnapshot, Deletesnapshot,DescribeVolume. Also Increase the Timeout to 10 secconds default timeout is 3 sec

Increased it to 10 Seconds.

Lambda Function ran successfully, but snapshot is still there

1. Delete the EC2 Instance and then run the lambda function again.

Only Snapshot is there, now runt the function again manually

5) Extended Trails

You can even try to create a Volume create a snapshot of this, and try to run the function again. and again run the Lambda function, and see the result

Thanks for reading, if you reached till here, please try to implement this simplest lab , cheers !!!