Cloud Monitor centrally manages system events and custom events for your cloud products. You can set alert rules for these events to receive alert notifications when an anomaly occurs. This helps you quickly analyze and resolve issues.
Background information
The legacy system event alert rule feature is no longer being upgraded and will be phased out. We recommend that you use the new event subscription feature instead. For more information about how to create a subscription policy, see Create a subscription policy.
The following table describes the event types and Alibaba Cloud services that CloudMonitor supports.
Event type | Description | Supported Alibaba Cloud services |
System event | CloudMonitor provides a unified portal to query system events for Alibaba Cloud services. This helps you monitor the operational status of your services and receive alert notifications. | |
Custom event | Use the custom event reporting API of CloudMonitor to report anomalous activities of a target Alibaba Cloud service to CloudMonitor. This helps you monitor the operational status of the service and receive alert notifications. | All Alibaba Cloud services supported by CloudMonitor. |
Create a custom event-triggered alert rule
Prerequisites: If you want an alert rule to apply to instances in a specific application group, you must first create the application group and add resources to it. For more information, see Create an application group and Add resources to an application group.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Custom Event page, click the Event-triggered Alert Rule tab.
Click Create Alert Rule.
In the Create/Modify Event Alert panel, set the parameters for the custom event-triggered alert rule.
Table 1. Parameters for custom event-triggered alert rules
Parameter
Description
Alert Rule Name
The name of the event-triggered alert rule.
Application Group
Alert notifications are sent only when a relevant event occurs on a resource within the specified application group.
Event Name
The name of the custom event.
Rule Description
A description of the event-triggered alert rule. The cumulative number of alerts that occur within a 1- to 5-minute period.
Notification Method
The notification method and level for the event alert. Valid values:
Phone call + Text message + Email + Webhook (CRITICAL)
Text message + Email + Webhook (WARN)
Email + Webhook (INFO)
Contact Group
The alert contact group for the event-triggered alert rule.
Alert Callback
Set the webhook address and request method. Enter a URL that is accessible over the Internet. Cloud Monitor pushes alert information to this URL using POST or GET requests. Only the HTTP protocol is supported. For more information about how to set an alert callback, see Use a threshold-triggered alert callback.
To test the connectivity of the alert callback URL, perform these steps:
Click Test next to the callback URL.
In the Webhook Test panel, you can check the connectivity of the alert callback URL and troubleshoot issues based on the returned status code and test result details.
NoteYou can also set the Callback Template Type and Language for the webhook and then click Test again to view the test result details.
Click Close.
Click OK.
Modify a custom event-triggered alert rule
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Custom Event page, click the Event-triggered Alert Rule tab.
In the Operation column of the target alert rule, click Modify.
In the Create/Modify Event Alert panel, set the parameters for the custom event-triggered alert rule.
For more information about the parameters for a custom event-triggered alert rule, see Parameters for custom event-triggered alert rules.
Click OK.
Disable a custom event-triggered alert rule
By default, a newly created custom event-triggered alert rule is enabled, and its Enable Status is 
. If you do not want to receive alert notifications for a custom event, you can disable its rule. Alert notifications automatically resume when you re-enable the rule.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Custom Event page, click the Event-triggered Alert Rule tab.
Disable the custom event-triggered alert rule.
Disable a single rule
In the Operation column of the target alert rule, click the
icon, and then click Disable.Click OK.
Disable rules in a batch
Select the check boxes for the alert rules that you want to disable, and then click Disable in the lower-left corner.
Click OK.
Enable a custom event-triggered alert rule
If the Enable Status of a custom event-triggered alert rule is 
, you can enable the rule.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Custom Event page, click the Event-triggered Alert Rule tab.
Enable the custom event-triggered alert rule.
Can be enabled individually
In the Operation column of the target alert rule, click the
icon, and then click Enable.Click OK.
Enable rules in a batch
Select the check boxes for the alert rules that you want to enable, and then click Enable in the lower-left corner.
Click OK.
Delete a custom event-triggered alert rule
After you delete the alert rule for a custom event, you will no longer receive alert notifications for that event.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Custom Event page, click the Event-triggered Alert Rule tab.
Delete the custom event-triggered alert rule.
Deleting items individually
In the Operation column of the target alert rule, click the
icon, and then click Delete.Click OK.
Batch deletion
Select the check boxes for the alert rules that you want to delete, and then click Delete in the lower-left corner.
Click OK.