You can use alert rules to specify how CloudMonitor checks monitoring data and when CloudMonitor sends alert notifications. After you configure alert rules for specific metrics, you can receive alert notifications immediately after exceptions occur and handle the exceptions at the earliest opportunity.

Background information

  • You can specify a mute period such as 24 hours for an alert rule. If the alert rule is not triggered as expected, CloudMonitor sends only one alert notification within the mute period. This prevents an excessive number of alert notifications from being sent in a short period of time.
  • By default, CloudMonitor automatically creates an alert contact group and adds your Alibaba Cloud account as an alert contact to the alert contact group.

Create an alert contact

An alert contact can be added to multiple alert contact groups.

  1. Log on to the CloudMonitor console.
  2. In the left-side navigation pane, choose Alerts > Alert Contacts.
  3. On the Alert Contacts tab, click Create Alert Contact.
  4. In the Set Alert Contact panel, enter the name, email address, and webhook of the alert contact, and make sure that the Language of Alert Notifications parameter is set to the default value Automatic.
    Note Automatic indicates that CloudMonitor automatically selects the language of alert notifications based on the language that you use to create your Alibaba Cloud account.
  5. Verify the parameters and click OK.
  6. Optional. Activate the email address of the alert contact.
    By default, the email address of the alert contact is in the Pending Activation state. After the alert contact receives an email that contains the activation link, the alert contact must activate the email address within 24 hours. Otherwise, the alert contact cannot receive alert notifications. After the email address is activated, you can view the email address in the alert contact list.

Create an alert contact group

An alert contact group can contain one or more alert contacts.

  1. Log on to the CloudMonitor console.
  2. In the left-side navigation pane, choose Alerts > Alert Contacts.
  3. Click the Alert Contact Group tab.
  4. On the Alert Contact Group tab, click Create Alert Contact Group.
  5. In the Create Alert Contact Group panel, enter a name for the alert contact group and add alert contacts to the alert contact group.
  6. Click Confirm.

Add multiple alert contacts to an alert contact group at a time

  1. Log on to the CloudMonitor console.
  2. In the left-side navigation pane, choose Alerts > Alert Contacts.
  3. On the Alert Contacts tab, click the check boxes in front of the alert contacts.
  4. Click Add to Contact Group.
  5. In the Confirm dialog box, select the alert contact group.
  6. Click OK.

Create an alert rule

  1. Log on to the CloudMonitor console.
  2. In the left-side navigation pane, choose Alerts > Alert Rules.
  3. On the Alert Rules page, click Create Alert Rule.
  4. In the Create Alert Rule panel, set the parameters. The following table describes the parameters.
    Parameter Description
    Product The name of the Alibaba Cloud service that can be monitored by CloudMonitor. Example: RDS-DB.
    Resource Range The range of the resources to which the alert rule is applied. Valid values:
    • All Resources: The alert rule applies to all resources of the specified cloud service.
    • Application Group: The alert rule applies to all resources in the specified application group of the specified cloud service.
    • Instances: The alert rule applies to the specified resources of the specified cloud service.
    Rule Description The content of the alert rule. The parameters in this section specify the conditions that trigger an alert. To configure the content of the alert rule, perform the following steps:
    1. Click Add Rules.
    2. In the Add Rule Description panel, specify the rule name, metric type, metrics, thresholds, and alert levels.
    3. Click OK.
    Mute For The interval at which CloudMonitor sends alert notifications until the alert that is triggered based on the alert rule is cleared. Valid values: 5 min, 15 min, 30 min, 60 min, 3 h, 6 h, 12 h, and 24 h.

    An alert is triggered when the conditions of an alert rule are met. CloudMonitor does not resend an alert notification if the alert is triggered within the mute period. If the alert is not cleared after the mute period ends, CloudMonitor resends alert notifications.

    Effective Period The period during which the alert rules are effective. CloudMonitor monitors the metrics and generates alerts only if the alert rules are effective.
    Alert Contact Group The alert contact group to which alert notifications are sent.

    The alert notifications of the application group are sent to the alert contacts that belong to the alert contact group. An alert contact group can contain one or more alert contacts.

    For more information about how to create an alert contact and an alert contact group, see Create an alert contact or alert contact group.

    Alert Callback The callback URL that can be accessed over the Internet. CloudMonitor sends a POST request to push an alert notification to the specified callback URL. Only HTTP requests are supported. For more information about how to configure alert callbacks, see Use the alert callback feature to send notifications about threshold-triggered alerts.
    Note You can click Advanced settings to set this parameter.
    Auto Scaling If you turn on Auto Scaling and an alert is triggered, the specified scaling rule is enabled. You must set the Region, ESS Group, and ESS Rule parameters.
    Note You can click Advanced settings to set this parameter.
    Log Service If you turn on Log Service and an alert is triggered, the alert information is written to the specified Logstore in Log Service. You must set the Region, ProjectName, and Logstore parameters.

    For information about how to create a project and a Logstore, see Getting Started.

    Note You can click Advanced settings to set this parameter.
    Message Service - topic If you turn on Message Service - topic and an alert is triggered, the alert information is written to the specified topic in Message Service (MNS). You must set the Region and topicName parameters.

    For information about how to create a topic, see Create a topic.

    Note You can click Advanced settings to set this parameter.
    Method to handle alerts when no monitoring data is found The method that is used to handle alerts when no monitoring data is found. Default value: Do not do anything. Valid values:
    • Do not do anything
    • Send alert notifications
    • Treated as normal
    Tag The specified tags are added to the alert content.
  5. Click OK.