Creating a Silence Rule

You can shield alarm notifications in a specified period. A silence rule takes effect immediately after it is created.

Procedure

You can create up to 100 silence rules.

Log in to the AOM 2.0 console.
In the navigation pane, choose Alarm Management > Alarm Noise Reduction.

On the Silence Rules tab page, click Create and set parameters such as the rule name and silence condition.

Figure 1 Creating a silence rule

**Table 1** Setting a silence rule
Category	Parameter	Description
-	Rule Name	Name of a silence rule. Enter up to 100 characters and do not start or end with an underscore (_). Only letters, digits, and underscores are allowed.
	Enterprise Project	Enterprise project. If you have selected All for Enterprise Project on the global settings page, select one from the drop-down list here. If you have already selected an enterprise project on the global settings page, this option will be dimmed and cannot be changed.
	Description	Description of a silence rule. Enter up to 1024 characters.
Silence Rule	Silence Condition	Any alarm notifications that meet the silence condition will be shielded. Value range and description: Alarm Severity: severity of a metric or event alarm. Options: Critical, Major, Minor, and Warning. Example: Alarm Severity Equals to Critical Resource Type: resource type selected when you create an alarm rule or customize alarm reporting. Options: host, container, process, and so on. Example: Resource Type Equals to container Alarm Source: name of the service that triggers the alarm or event. Options: AOM, LTS, CCE, and so on. Example: Alarm Source Equals to AOM Tag: alarm identification attribute, which consists of the tag name and tag value and can be customized. Example: Tag aom_monitor_level Equals to infrastructure XX Exists: indicates the alarm whose metadata contains parameter XX. Example: For Alarm Source Exists, the alarms whose metadata contains the provider will be filtered. XX Regular Expression: indicates the alarm whose parameter XX matches the regular expression. Example: For Resource Type Regular Expression host, the alarms whose resource type contains host* will be filtered. Rule description: You can create up to 10 parallel conditions under Silence Condition, and up to 10 serial conditions under each parallel condition. Serial conditions are in the AND relationship whereas parallel conditions are in the OR relationship. An alarm must meet all serial conditions under one of the parallel conditions. Example: If Alarm Severity is set to Warning in a serial condition, warnings will be shielded.
	Silence Time	Time when alarm notifications are shielded. There are two options: Fixed time: Alarm notifications are shielded only in a specified period. Cycle time: Alarm notifications are shielded periodically.
	Time Zone/Language	Time zone and language for which alarm notifications are shielded. The time zone and language configured in Preferences are selected by default. You can change them as required.

Click Confirm.

More Operations

After creating a silence rule, you can also perform the operations listed in Table 2.

**Table 2** Related operations
Operation	Description
Modifying a silence rule	Click Modify in the Operation column.
Deleting a silence 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 silence rule	Enter a rule name in the search box in the upper right corner and click .