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A monitor is a background task that periodically runs a query that you define. For example, it counts the number of error messages in your logs over the previous 5 minutes. A notifier defines how Axiom notifies you about the monitor output. For example, Axiom can send you an email. By adding a notifier to a monitor, you receive a notification with the following message:
  • When a match monitor matches an event, the message contains the full event if you created the monitor using the simple query builder, or the output of the APL query if you created the monitor using APL.
  • When a threshold monitor changes state, the message includes a relevant value from the query results. If you enable Notify by group, the notification message also contains the relevant group value.

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Include custom fields in alert messages

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Threshold monitors

To include a specific attribute, such as the app name or service name, in a threshold monitor alert message, group your query by that field and enable Notify by group. Axiom includes the group value in the notification. For example, to receive an alert that identifies which app triggered it, write a query like the following: 
['your_dataset']
| summarize count() by ['app_name'], bin(_time, 5m)
Then enable Notify by group in the monitor settings. Each notification identifies which app_name value crossed the threshold.

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Match monitors

To control exactly which fields appear in a match monitor notification, use the project operator in your APL query to select only the fields you want to include. For example: 
['your_dataset']
| where level == "error"
| project _time, app_name, message, user_id
The notification message contains only the fields you specified. Choose one of the following to learn more about a type of notifier:

Custom webhook

Discord

Email

Microsoft Teams

Opsgenie

Pagerduty

Slack