Alert thresholds for automonitored resources are configured through alert definitions. Alert definitions are a streamlined and centralized mechanism to alert on collected metric data. After alert thresholds are configured, alerts are generated.
Automonitoring focuses on alert definition and directly configures the alert threshold on the discovered and automonitored resource. Alert definitions are set by metrics but are independent of the metric collection. They serve as a logical layer above the metric data.
Availability metrics are not support. In addition, resources do not have a default availability metric assigned.