Question

You manage 30 Azure virtual machines in the same subscription and region. You need to receive an alert whenever the average CPU on any of these VMs exceeds 85% over a 5-minute window. You want to minimize the number of alert rules you have to create and maintain. What should you do?

Accepted Answer

Create a single metric alert rule that targets all 30 VMs as a multi-resource scope, using the Percentage CPU metric with an 85% threshold.

Answer

Create 30 separate metric alert rules, one for each VM, using the Percentage CPU metric.

Answer

Create a single log search alert rule using a KQL query that joins each VM's performance data individually.

Answer

Create an activity log alert scoped to the resource group containing the VMs.