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Advanced

Creating an Alarm Rule

Scenarios

The alarm function provides the alarm service for monitoring data. By creating alarm rules, you define how the alarm system checks monitoring data and sends alarm notifications when monitoring data meets alarm policies.

After creating alarm rules for important metrics or events, you can promptly identify metric data exceptions and quickly rectify the faults.

Functions

  • Alarm rules can be created for all monitoring items on Cloud Eye.
  • Alarm rules can be created for all resources, resource groups, log monitoring, and custom monitoring.
  • You can set notification windows of alarm rules, that is, customize the time when alarm rules are applied.
  • Notifications can be sent by email, SMS message, or HTTP/HTTPS message.

Procedure

  1. Log in to the management console.
  2. Click Service List in the upper left corner and select Cloud Eye.
  3. In the navigation pane on the left, choose Alarm Management > Alarm Rules, and click Create Alarm Rule in the upper right corner.
  4. On the Create Alarm Rule page, configure the parameters.
    1. Configure the alarm rule name and description.
      Table 1 Name and Description

      Parameter

      Description

      Name

      Specifies the alarm rule name. The system generates a random name, which you can modify.

      Example value: alarm-b6al

      Description

      (Optional) Provides supplementary information about the alarm rule.

    2. Select a monitored object and configure alarm content parameters.
      Table 2 Parameters

      Parameter

      Description

      Example Value

      Alarm Type

      Specifies the alarm type to which the alarm rule applies. The value can be Metric or Event.

      Metric

      Resource Type

      Specifies the type of the resource the alarm rule is created for.

      Elastic Cloud Server

      Dimension

      Specifies the metric dimension of the selected resource type.

      ECSs

      Monitoring Scope

      Specifies the monitoring scope the alarm rule applies to. You can select Resource groups or Specific resources.

      NOTE:
      • If Resource groups is selected and any resource in the group meets the alarm policy, an alarm is triggered.
      • If you select Specific resources, click Select Specific Resources and select resources.

      Specific resources

      Group

      This parameter is mandatory when Monitoring Scope is set to Resource groups.

      N/A

      Method

      There are two options: Use template or Configure manually.

      Configure manually

      Template

      Specifies the template to be used.

      You can select a default or a custom alarm template.

      ECS Alarm Template

      Alarm Policy

      Specifies the policy for triggering an alarm.

      If you set Resource Type to Custom Monitoring or a specific cloud service, whether an alarm will be triggered depends on whether the metric data in consecutive periods reaches the threshold. For example, Cloud Eye triggers an alarm if the average CPU usage of the monitored object is 80% or more for three consecutive 5-minute periods.

      If you set Resource Type to Event Monitoring, the event that triggers an alarm is an instant operation. For example, if event improper ECS running occurs, Cloud Eye triggers an alarm.

      NOTE:

      A maximum of 50 alarm policies can be added to an alarm rule. If any one of these alarm policies is met, an alarm will be triggered.

      N/A

      Mount Point or Disk

      This parameter is displayed on the console and can be configured only when the following conditions are met:

      • The monitoring scope is Resource groups or Specific resources.
      • Resource Type: ECSs or BMSs
      • Method : Configure manually.
      • Metric Name in an alarm policy: disk metric whose name is prefixed with Agent

      For the Windows OS, enter a drive letter, such as C, D, or E. For the Linux OS, enter a mount point, such as /dev or /opt.

      /dev

      Alarm Severity

      Specifies the alarm severity, which can be Critical, Major, Minor, or Informational.

      Major

    3. Configure the alarm notification.
      Table 3 Parameters for configuring alarm notifications

      Parameter

      Description

      Alarm Notification

      Specifies whether to notify users when alarms are triggered. Notifications can be sent by email, SMS message, or HTTP/HTTPS message.

      Notification Object

      Specifies the object to which alarm notifications will be sent. You can select the account contact or a topic.

      • The account contact is the tenant owner. If a user registers both a mobile number and an email address, they will receive alarm information through both channels. However, if only one of these contact methods is registered, the alarm information will be sent exclusively to that registered one.
      • A topic is a specific event type for publishing messages or subscribing to notifications. If the required topic is not available, create one and add subscriptions to it first. For details, see Creating a Topic and Adding Subscriptions.

      Notification Window

      Cloud Eye sends notifications only within the notification window specified in the alarm rule.

      If Notification Window is set to 08:00-20:00, Cloud Eye sends notifications only from 08:00 to 20:00.

      Trigger Condition

      Specifies the condition for triggering an alarm notification.

      • If Alarm Type is set to Metric, you can select Generated alarm, Cleared alarm, or both.
      • If Alarm Type is set to Event, you can select Generated alarm only.
    4. Click Create.

After the alarm rule is created, if the metric data reaches the specified threshold, Cloud Eye immediately informs you that an exception has occurred.