Question

I am in the process of publishing several custom metrics for CloudWatch.
When the metrics are on my own namespace, all goes well.
I now want to publish a per-instance metric, similar to CPUUtilization, with dimensions ImageId=i-XXXXXXXX, in the AWS/EC2 namespace.
Unfortunately, CloudWatch disagrees with me and gives me this error:
“The value AWS/ for parameter Namespace is invalid.”

• How do I add a custom metric to a specific instance?
• Is this possible at all?

many thanks,

Answer 1

The AWS/EC2 namespace is reserved for EC2 published metrics, so it’s not possible. I’m sure I read it in the documentation but I can’t find the source today.

Check the last post in this thread:
https://forums.aws.amazon.com/thread.jspa?threadID=86835