Creating an AOM Alarm Suppression Rule

Constraints

• If the source alarm corresponding to the suppression condition is cleared before the alarm notification is sent, the suppression rule becomes invalid. For the suppressed object (alarm suppressed by the source alarm), the alarm notification can still be sent as usual.
• You can create a maximum of 100 suppression rules. If this number has been reached, delete unnecessary rules.
• Orchestration only applies to the alarms triggered by Prometheus and log monitoring-related alarm rules.

Procedure

1. Log in to the AOM 2.0 console.
2. In the navigation pane, choose Alarm Center > Alarm Noise Reduction. On the Suppression tab page, click Create.
3. Set the basic information about a suppression rule.

   Table 1 Basic information about the suppression rule

   Parameter	Description
   Rule Name	Name of a suppression rule. Enter a maximum of 100 characters and do not start or end with an underscore (_). Only letters, digits, and underscores are allowed.
   Enterprise Project	Enterprise project. If Enterprise Project is set to All on the global settings page, select an enterprise project from the drop-down list here. If you have already selected an enterprise project on the global settings page, this option will be grayed and cannot be changed. To select the newly created enterprise project during the creation of an alarm suppression rule, wait for about 10 minutes after the enterprise project is created.
   Description	Description of a suppression rule. Enter up to 1,024 characters.

4. Set Impact On.
   • Specific grouping rule: applies to the alarms triggered by the alarm rule bound to a specific grouping rule. The alarm rules that are not bound to the specific grouping rule will not be impacted.
   • Any grouping rule: applies to the alarms triggered by the alarm rule bound to any grouping rule. This option has a wide impact. The alarm rules whose alarm mode is set to Direct alarm reporting will not be impacted.

5. Orchestrate the suppression rule. Source alarms will suppress other alarms. Suppressed alarms are those alarms suppressed by source alarms.
   For example, if the source alarm's serial condition is Alarm Severity Equals To Critical and the suppressed alarm's serial condition is Alarm Severity Equals To Warning, warnings will be suppressed when critical alarms are generated.

   • Click . Then you can select And or Or to configure filter conditions.
     • And: An alarm is triggered only when all conditions are met.
     • Or: An alarm is triggered when any condition is met.
   • Click to nest filter conditions.
   • Click to set multiple filter conditions.

     Table 2 Filter condition parameters

     Parameter	Description	Example
     Alarm Severity	Severity of a metric or event alarm. Options: Critical, Major, Minor, and Warning.	Alarm Severity + Equals To + Critical
     Resource Type	Type of the resource selected when you create an alarm rule or configure custom alarm reporting. Options: include Service and Cluster.	Resource Type + Equals To + Cluster
     Alarm Source	Name of the service that triggers an alarm or event. Options: include AOM, LTS, and CCE.	Alarm Source + Equals To + AOM
     Tag	Alarm identification attribute. It consists of a tag name and tag value and can be customized.	Tag + resource_type + Equals To + AOM
     Alarm Rule's Enterprise Project	Enterprise project specified when the alarm rule is created. You can select the corresponding enterprise project.	Alarm Rule's Enterprise Project + Equals To + default
     Original Rule Name	Original alarm rule name configured during rule creation. Enter the original name of the alarm rule.	Original Rule Name + Equals To + AOMAlarm
     Annotation	Configured during alarm rule creation. It is an attribute that cannot be used to identify alarms. It consists of an annotation name and annotation value and can be customized.	Annotation + aom_monitor_level + Equals To + infrastructure
     First Triggered	Time range when an alarm is triggered for the first time. You can select Within Range or Out of Range for matching.	First Triggered + Within Range + 2025.04.08 15:26 — 2025.04.08 16:26
     -	Matching conditions: Exists: XX + Exists + AA. This means that the alarm whose XX contains AA is filtered. For example, Tag + Exists + AOM indicates that the alarm whose tag contains AOM is filtered. Not Exist: XX + Not Exist + AA. This means that the alarm whose XX does not contain AA is filtered. For example, Tag + Not Exist + AOM indicates that the alarm whose tag does not contain AOM is filtered. Matches Regular Expression: XX + Matches Regular Expression + Expression. This means that the alarm whose XX matches the specified regular expression is filtered. For example, Resource Type + Matches Regular Expression + host* indicates that the alarm whose resource type starts with host is filtered. Not Match Regular Expression: XX + Not Match Regular Expression + Expression. This means that the alarm whose XX does not match the specified regular expression is filtered. For example, Alarm Source + Not Match Regular Expression + LTS* indicates that the alarm whose alarm source does not start with LTS is filtered. Equals To, Not Equal To, Within Range, and Out of Range are not described in detail herein.	-

6. Click OK.

More Operations

After creating a suppression rule, perform the operations listed in Table 3 if needed.

Table 3 Related operations

Operation	Description
Viewing a suppression rule	Click the name of a suppression rule in the rule list to view its details.
Modifying a suppression rule	Click Modify in the Operation column.
Deleting a suppression rule	To delete a single rule, click Delete in the Operation column in the row that contains the rule. To delete one or more rules, select them and click Delete above the rule list.
Searching for a suppression rule	Enter a rule name in the search box in the upper right corner and click . Suppression rules can be filtered by rule name, description, and enterprise project only in some regions.
Setting column display	Click in the upper right corner of the list. In the displayed dialog box, set column display. Basic settings Table Text Wrapping: This feature is enabled by default. If you enable this feature, excess text will move down to the next line; otherwise, the text will be truncated. Data Columns: You can select Freeze none, Freeze first, or Freeze first two. Operation Column: Select Freeze. Then the operation column will always be in the last column and visible. Custom Columns: Select or deselect the columns to display.