I have an Ubuntu 16.04 T3.small instance running and tried adding a cloudwatch alarm to the instance from the AWS console. After the request spun for about 2 minutes, which caused Apache running on the same server to become unresponsive; cloudwatch ultimately failed to add the alert and reported the following error:
"The request signature we calculated does not match the signature you provided".
This is particularly vexing since I made the request from the console, NOT the API. Does anyone know what this error implies specifically in terms of an issue with the instance?
More importantly, I wanted to stop the instance and re-size it. If I do this from the console, will stopping / restarting fail since the "signature" is not being calculated properly? I have a backup AMI, but if the primary AMI is failing on the cloudwatch console request, and could fail on other console functions, my guess is the backup won't work either.
Any insight into the issue, and what it implies when using other console commands would be much appreciated.
Thanks
-Avi
AWS OFFICIALUpdated 2 years ago
It's not very clear what are you trying to do. You're trying to add cloudwatch alarm for EC2 instance from AWS Console, right? But what about Apache, not clear why you mentioned it. Is it running on that instance?
Hey A-Shevchenko
Thanks for answering. I was trying to add a cloudwatch alarm for CPU overage to my instance from the cloudwatch console page. After configuring what I wanted and clicking "add alarm", the console UI "spun" for about 2 minutes, and as a side note, apache that was running on the instance in question became unresponsive; eventually, the alarm failed to set, and the above error was returned.
My real question is what does that error actually mean, and will other console functions like stopping / restarting the instance fail due to the same issue.
thanks