Ensure that all Amazon ElastiCache Reserved Cache Node (RCN) purchases are reviewed every 7 days in order to confirm that no unwanted reservation purchase has been placed recently.
This rule can help you work with the AWS Well-Architected Framework
This rule resolution is part of the Cloud Conformity Cost Management tool for AWS
By checking your ElastiCache Reserved Cache Nodes on a regular basis you can detect and cancel any unwanted purchases placed within your AWS account and avoid unexpected charges on your AWS monthly bill.
Note: You can change the default threshold value (7 days) for the review time range within the rule settings available on the Cloud Conformity console.
To identify all ElastiCache RCN purchases placed recently in your AWS account for review purposes, perform the following:
Case A: Check the Cloudtrail service logs (if Amazon Cloudtrail is enabled) from the date when the ElastiCache RCN purchase request was placed to determine the request origin and context. To find and analyze the necessary AWS API logging data recorded by CloudTrail, perform the following actions:
Case B: Another way to mitigate unwanted ElastiCache Reserved Cache Node purchase requests is to contact Amazon Web Services and ask for RCN purchases cancellation. To create the necessary case through the AWS Support Center, perform the following:Note: Requesting Amazon to cancel your unwanted ElastiCache RCN purchase requests using AWS Management Console or AWS API via Command Line Interface (CLI) is not currently supported.