python-lambda-ec2

This is a simple python serverless lambda function which would terminate all EC2 instances which don’t follow a tagging criteria. (A free tier AWS account would work).

Files intro.

every-hour-call.py - This function would call every 1-hour using cloud watch and remind the untagged instances with instance id by email. terminate.py - The terminate function runs every 6 hours using cloud watch and terminates the instance which doesn't have Name, Env, Created_By tags.

Setup in AWS

• Create the instance with a tag like a Name, Environment, and Created_by and without a tag(at least one)
• Setup IAM Roles to lambda function if you don't have(IAM->Access Management->Roles->create_role->lambda->choose lambdaBasicExecutionRole and ec2fullaccess).
• During creating lambda function choose to use an existing role from permission and create a function for every hour check.
• Copy-paste every-hour-call.py inside this function save and deploy.
• Now you have to be set up the configure test event with an empty JSON payload (e.g { })
• For termination follows the 3, 4, and 5 steps as mentioned above.
• After successful setup of lambda function we have to schedule lambda function using Cloudwatch Event Rules to trigger Lambda for both functions. (CloudWatch->Events->Rules->Create Rule->Schedule->Add target(select lambda function)[Create two rules for both function,1 hours rule for every hour call and 6 hours rule for termination.]).
• In the send_email function in both the files mention verified Amazon simple email service email address. [Change Source, ToAddresses email address from send_email function accordingly to your AWS verified email address.]