You have a requirement to automate the creation of EBS Snapshots. You need to create a trigger for this activity. Which of the following can be used to achieve this in the best way possible?

Answer options:

A.Create a powershell script that uses the AWS CLI to get the volumes and then run the script as a cron job.
B.Use the AWS Config service to create a snapshot of the AWS Volumes.
C.Use the AWS CodeDeploy service to create a snapshot of the AWS Volumes.
D.Use Cloudwatch Events to trigger the snapshots of EBS Volumes.

Answer – D
The best is to use the inbuilt service from Cloudwatch, as Cloudwatch Events automate the creation of EBS Snapshots. With
Option A, you would be restricted to running the powrshell script on Windows machines and maintaining the script itself. And then you have the overhead of having a separate instance just to run that script.
When you go to Cloudwatch events, you can use the Target as EC2 CreateSnapshot API call as shown below.
The AWS Documentation mentions
Amazon CloudWatch Events delivers a near real-time stream of system events that describe changes in Amazon Web Services (AWS) resources. Using simple rules that you can quickly set up, you can match events and route them to one or more target functions or streams. CloudWatch Events becomes aware of operational changes as they occur. CloudWatch Events responds to these operational changes and takes corrective action as necessary by sending messages to respond to the environment, activating functions, making changes, and capturing state information.
For more information on Cloudwatch Events, please visit the below URL:
http://docs.aws.amazon.com/AmazonCloudWatch/latest/events/WhatIsCloudWatchEvents.html