Which alert gets triggered?

Question

Hi,

Let's say I've setup three alert rules for the same signal (e.g. a specific operation on virtual machine) on resource level, resource group level and subscription level. The resource is under the resource group and the subscription. When the condition is met, which alert gets triggered? All three alerts or only the one which is scoped at the resource level?

Answer 1

Hello Mahdi Azarboon,

Thanks for your question.

So far the conditions are met, all alert rules configured for that condition, regardless of their scope, will be triggered if they include the affected resource within their scope.

Hence, in your scenario all three alerts can be triggered if the condition is met.

Also, consider stateful and stateless alerts to tell if they will be triggered again.

See: https://learn.microsoft.com/en-us/azure/azure-monitor/alerts/alerts-overview#alerts-and-state

You can mark it 'Accept Answer' and 'Upvote' if this helped you

Regards,

Abiola

Answer 2

Hello Mahdi Azarboon, alerts can be stateful or stateless.

• Stateless alerts fire each time the condition is met, even if fired previously
• Stateful alerts fire when the rule conditions are met, and will not fire again or trigger any more actions until the conditions are resolved

Metric alerts are stateful by default, so other alerts aren't fired if there's already a fired alert on a specific time series. You would want to refer to a good FAQ on this -- https://learn.microsoft.com/en-us/azure/azure-monitor/alerts/alerts-troubleshoot-metric

Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.