Aggregated AMI metrics return "INSUFFICIENT_DATA"

Question

I'm trying to set up my own autoscaling system on AWS and I've set up alarms for any instance spawned with a specific AMI ID.

When I check the the metrics which are only monitoring one server, they get information just fine. The "aggregated" stats however always fail.

Is this a problem with AWS or does this not do what I think it does. I'll also point out these are all default metrics, not added through the CLI API.

Answer 1

Have you enabled detailed monitoring for your instances? AWS supports aggregated metrics only for instances with detailed monitoring enabled:

For the instances where you've enabled detailed monitoring, you can also get aggregated data across groups of similar instances.

See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/US_GetStatistics.html.

Answer 2

If your cloud metrics says "insufficient data" that means your server have not met the state which you have configured using CLI.