Once log management is enabled for your organization, you can create a logs monitor to alert you when a specified type of log exceeds a user-defined threshold over a given period of time.
To create a logs monitor in Datadog, use the main navigation: Monitors –> New Monitor –> Logs.
As you define the search query, the graph above the search fields updates.
Construct a search query using the same logic as a log explorer search.
Unique value countof the facet.
Group logs by multiple dimensions (optional):
All logs matching the query are aggregated into groups based on the value of up to four log facets. When there are multiple dimensions, the top values are determined according to the first dimension, then according to the second dimension within the top values of the first dimension, and so on up to the last dimension. Dimensions limit depends on the total number of dimension:
Configure the alerting grouping strategy (optional):
deviceto receive a separate alert for each device that is running out of space.
above or equal to,
below or equal to
1 hour, etc. or
customto set a value between
NO DATA is a state given when no logs match the monitor query during the timeframe.
To receive a notification when all groups matching a specific query have stopped sending logs, set the condition to
below 1. This notifies when no logs match the monitor query in a given timeframe across all aggregate groups.
When splitting the monitor by any dimension (tag or facet) and using a
below condition, the alert is triggered if and only if there are logs for a given group, and the count is below the threshold—or if there are no logs for all of the groups.
For detailed instructions on the Say what’s happening and Notify your team sections, see the Notifications page.
When a logs monitor is triggered, samples or values can be added to the notification message.
|Monitor over||Can be added to notification message|
|Log count||Grouped: The top 10 breaching values and their corresponding counts.|
Ungrouped: Up to 10 log samples.
|Facet or measure||Grouped: The top 10 facet or measure values.|
Ungrouped: The top 10 facet or measure values.
These are available for notifications sent to Slack, Jira, webhooks, Microsoft Teams, Pagerduty, and email. Note: Samples are not displayed for recovery notifications.
To disable log samples, uncheck the box at the bottom of the Say what’s happening section. The text next to the box is based on your monitor’s grouping (as stated above).
Include a table of the top 10 breaching values:
Include a sample of 10 logs in the alert notification:
Additional helpful documentation, links, and articles: