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Creating a notification channel that invokes a function

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Updated at October 29, 2025

You can specify a function in Cloud Functions as the notification method. This function will be invoked when an alert fires or in an escalation as a standard notification channel.

To set up notifications with Cloud Functions:

  1. In the management console, go to the folder containing the resources you monitor in Monitoring.
  2. In the list of services, select Cloud Functions.
  3. Create a function and a function version.
  4. In the settings, enable asynchronous invocation.
  5. Create a service account with the functions.functionInvoker and functions.viewer roles. You will need it to invoke your function.
  6. In the list of services, select Monitoring.
  7. Click Create channel.
  8. Enter a name for your notification channel.
  9. From the Method list, select Cloud Functions.
  10. From the Service account list, select an account for running the function.
  11. Click Create.

Message format when invoking a function in Cloud Functions

When invoking a function in Cloud Functions, the alert or escalation will send a JSON message with details of the triggered alert to the event argument in the function entry point:

{
    "alertId": "",
    "alertName": "",
    "folderId": "",
    "status": "",
    "annotations": {
        "key1": "value1",
        "key2": "value2"
    }
}
  • alertId: ID of the triggered alert (text).
  • alertName: Name of the triggered alert (text).
  • folderId: ID of the folder where the alert fired (text).
  • status: Alert status (text).
  • annotations: Values of annotations for the fired alert (key:value dictionary).

For an example of invoking a function, see Webhook using Cloud Functions.

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