ApsaraDB for MongoDB:Create an event-triggered alert rule

Prerequisites

Before you begin, ensure that you have:

• An application group with MongoDB instances added, if you plan to scope alerts to a specific group. See Create an application group and Modify an application group

Event types

CloudMonitor supports two event types:

Create a system event-triggered alert rule

1. Log on to the CloudMonitor console.

2. In the left-side navigation pane, click Application Groups.

3. On the Application Groups tab, click the name of the application group you want.

4. In the left-side navigation pane, click System Event.

5. On the Event Monitoring page, click Save as Alert Rule.

6. In the Create/Modify Event-triggered Alert Rule panel, configure the following parameters.

   Basic info

   Parameter	Description
   Alert Rule Name	A name for the alert rule.

   Event-triggered alert rules

   Parameter	Description
   Product Type	The Alibaba Cloud service to monitor. For supported services, see Appendix 2: System events.
   Event Type	The category of event that triggers the alert. For supported event types per service, see Appendix 2: System events.
   Event Level	The severity level that triggers the alert. For supported levels per service, see Appendix 2: System events.
   Event Name	The specific event name that triggers the alert. For supported event names per service, see Appendix 2: System events.
   Keyword Filtering	Filter alerts by keywords in the event content. Valid values: Contains any of the keywords (alert fires when the event content includes any specified keyword) and Does not contain any of the keywords (alert fires when none of the specified keywords are present). To view the event content structure, see View system events.
   SQL Filter	A SQL expression to filter event content using and and or operators. For example, Warn and i-hp368focau7dp0hw**** triggers alerts only when the event content contains both the instance ID i-hp368focau7dp0hw**** and the severity level Warn.
   Resource Range	The scope of resources the rule monitors. All Resources applies the rule to all resources of the selected service. Application Group applies it only to resources in a specific application group, which you select from a dropdown.

   Notification method (select at least one)

   Option	Description
   Alert Notification	Sends notifications to a contact group. Configure the Contact Group and the Notification Method (Critical, Warning, or Info, each delivered via Email + Webhook).
   Message Service - Queue	Delivers alerts to a Message Service (MNS) queue for programmatic processing.
   Function Compute	Triggers a Function Compute (FC) function when an alert fires.
   URL Callback	Sends an HTTP POST request to a public URL. Only HTTP URLs are supported. To verify connectivity, click Test next to the URL, configure the Test Template Type and Language in the Webhook Test panel, click Test, then click Close. For setup details, see Configure callbacks for system event-triggered alerts.
   Log Service	Delivers alerts to a Simple Log Service (SLS) Logstore.

   Mute For

   The interval at which CloudMonitor resends notifications while an alert remains unresolved. Valid values: 5 Minutes, 15 Minutes, 30 Minutes, 60 Minutes, 3 Hours, 6 Hours, 12 Hours, and 24 Hours.

   During the mute period, CloudMonitor suppresses repeated notifications even if the condition persists. Once the mute period ends and the alert is still active, CloudMonitor sends another notification. For example, if Mute For is set to 12 Hours, you receive a follow-up notification every 12 hours until the alert clears.

7. Click OK.

Create a custom event-triggered alert rule

1. Log on to the CloudMonitor console.

2. In the left-side navigation pane, click Application Groups.

3. On the Application Groups tab, click the name of the application group you want.

4. In the left-side navigation pane, click Custom Event.

5. On the Custom Event page, click the Event-triggered Alert Rules tab.

6. Click Create Alert Rule.

7. In the Create/Modify Event-triggered Alert Rule panel, configure the following parameters.

   Parameter	Description
   Alert Rule Name	A name for the alert rule.
   Event Name	The name of the custom event to monitor.
   Rule Description	The alert condition: the number of times the event must occur within a given period before an alert fires. The period can be 1, 2, 3, 4, or 5 minutes.
   Notification Methods	The severity level and delivery method for alert notifications. Valid values: Email + Webhook(CRITICAL), Email + Webhook(WARN), and Email + Webhook(INFO).
   Contact Group	The alert contact group that receives the notifications.
   Alert Callback	A public callback URL and request method. CloudMonitor sends a POST or GET request to the URL. Only HTTP URLs are supported. To verify connectivity, click Test next to the URL, configure the Test Template Type and Language in the Webhook Test panel, click Test, then click Close.

8. Click OK.