AutoComputeOptimizer

Easy to configure automation to automatically apply AWS Compute Optimizer recommendations on EC2 instances It uses CloudFormation, Lambda (Python 3.8), CloudWatch Events and AWS Compute Optimizer (Compute Optimizer should be already working on the account)

You can select the day to check the recommendatios, set the time when should be apply and the type of recommendations: Overprovisioned, Underprovisioned or Both.

You have to define a TAG to select the EC2 Instances affected by the Automation. You can set SNS Notifications for this automation.

If it's not working on your Region create an Issue and I will fix it.

Version 2.1.0

Files:

autoComputeOptimizer-template.yml, CloudFormation template to Run in your account, it is already in a public S3 bucket
autocomputeoptimizer.py, Lambda code that actually do the job of implementing the recommendations, source code only for reviewing
autocomputeoptimizer.zip, Zip file used by the template to deploy de Lambda, it is already in a public S3 Bucket

How To Deploy

Use AWS CloudFormation to deploy the following template:

https://higher-artifacts.s3.amazonaws.com/solutions/autoComputeOptimizer-template.yml

Parameters:

Env Tag, use to identified the components of the template
Selection Tag Key, sets the Tag used to identify the EC2 Instances
Selection Tag Value, sets the Value of the Tag to identify the EC2 Instances
Day, specify the day of the week the recommendations will be applied (Mon-Sun)
Time, specify at what time the changes to the EC2 Instances will occur (downtime requiered) (UTC 24 hours syntax)
Default Recommendation Type, specify which kind of recommendations to apply: Underprovisioned, Overprovisioned, Both
Tolerable Risk, select the maximum tolerable Risk of the recommendation to apply
Email Address, e-mail address to receive notifications of the implemmented recommendations

If you edit the template remember to use LF end of lines.

Update KMS user policy if you find troubles starting again the instances.

Notes:

Function DOES modify EC2 Instances types (this will require a reboot)
Function DOES NOT modify EC2 Instances of an AutoScaling Group
You can set a Tag Key and Value to select the group of EC2 Instances to be evaluated
UPDATE: Now you can override the behaviour per instance with: -- Selection Tag Values of ACOO-OVER to apply Oversized recomendations, ACOO-UNDER to apply Undersized recomendations, ACOO-BOTH to apply both recommendations

To-Do

Make a more restrict EC2 and KMS policy for the Lambda
A better error management
Evaluate the AutoScaling Group Recommendations
Improve SNS Notifications