CloudWatch isn't just for the cloud
How to extend CloudWatch to monitor and graph whatever you like
Amazon CloudWatch is an inexpensive way to monitor your solution in AWS and due to the extensive set of metrics provided for every AWS service out of the box, it’s easy and quick to adopt. Granted it’s not going to replace your enterprise monitoring solution overnight, but for those who haven’t got the time or justification to spin up their own Nagios/Zabbix/OpsView solution it can do basic event monitoring and alerting.