You configure alarm triggers to generate warnings and alerts when the specified criteria is met. Alarms have two types of triggers: condition or state triggers, and event triggers.

Condition or State Triggers

Monitor the current condition or state of virtual machines, hosts, and datastores. This includes power states, connection states, and performance metrics, such as CPU and disk usage. To set alarms on other objects in the inventory, including datacenters, clusters, resource pools, and networking objects, use event triggers.


You can set a condition or state alarm at the datacenter level that monitors all virtual machines, hosts, or datastores in the datacenter.

Event Triggers

Monitors events that occur in response to operations occurring with any managed object in the inventory, the vCenter Server system, or the license server. For example, an event is recorded each time a virtual machine is cloned, created, deleted, deployed, and migrated.