In the previous section, we added two alarms to our CloudFormation template. Whenever possible, keeping your monitoring information with the resources they are monitoring is good practice. Unfortunately, it isn't always easy to do. For instance, we are keeping track of the disk space usage of our EC2 instances. Those EC2 instances are created by our Auto Scaling group. Because of that, adding alerts for that metric in our troposphere code is a lot more complicated, as we don't have some of the critical information, such as the instance ID. To get around that issue, we are going to see how to create alerts based on infrastructure changes.
As we saw earlier, whenever a change ...
