Explanation/Reference:
Explanation:
An alert rule enables you to monitor an available metric within a supported Azure service. When the

value of a specified metric violates the threshold assigned for a rule, the alert rule becomes active and registers an alert. When you create an alert rule, you can select options to send an email notification to the service administrator and co- administrators, or another administrator, when the rule becomes active, and when an alert condition is resolved.
You can configure cloud service alert rules on: Web endpoint status metrics

Monitoring metrics from the cloud service host operating system Performance counters collected from the cloud service guest virtual machine References: http://msdn.microsoft.com/en-us/library/azure/dn306639.aspx