CloudMonitor:Create an alert rule

Procedure

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, configure the parameters. The following table describes the parameters.

   Example: Configure an alert rule for the CPU utilization of all Elastic Compute Service (ECS) instances. If the maximum CPU utilization is greater than or equal to 85% for three consecutive cycles, alert notifications are sent to all alert contacts in the alert contact group Alarm_Group by using emails and webhooks.

   1. Select Elastic Compute Service (ECS) for Product and All Resources for Resource Range.

   2. Configure trigger conditions for the alert rule.

      1. Click Add Rule.

      2. In the Add Rule Description panel, enter a rule name in the Alert Rule field, set Metric Type to Single Metric, and select Instance Dimension > (ECS) CPU Utilization from the Metric drop-down list. In the Critical section, select 3 Consecutive Cycles (1 Cycle = 1 Minute) and set the trigger condition to Maximum Value >= 85%.

      3. Click OK.

   3. Select Alarm_Group from the Alert Contact Group drop-down list. Retain the default settings of other parameters.

   Table 1. Parameters of an alert rule

   Parameter	Description
   Product	The name of the Alibaba Cloud service that can be monitored by CloudMonitor. For example, you can select ApsaraDB RDS.
   Resource Range	The range of the resources to which the alert rule applies. Valid values: All Resources: The alert rule applies to all resources of the specified cloud service. Application Groups: 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 specify the rule description, perform the following steps: Click Add Rule. In the Config Rule Description panel, enter a rule name and specify conditions. Single Metric: Select a metric and set the threshold and alert level for the metric. Multiple Metrics: Select an alert level and specify alert conditions for two or more metrics. Dynamic Threshold: For more information about dynamic thresholds, see Overview and Create dynamic threshold-triggered alert rules. Note The dynamic threshold feature is in invitational preview. To use the feature, you must submit a ticket. Click OK. Note For more information about how to specify complex alert conditions, see Alert rule expressions.
   Mute For	The interval at which CloudMonitor resends alert notifications before an alert is cleared. Valid values: 5 Minutes, 15 Minutes, 30 Minutes, 60 Minutes, 3 Hours, 6 Hours, 12 Hours, and 24 Hours. If a metric value reaches the threshold, CloudMonitor sends an alert notification. If the metric value reaches the threshold again within the mute period, CloudMonitor does not resend an alert notification. If the alert is not cleared after the mute period ends, CloudMonitor resends an alert notification. For example, if the Mute For parameter is set to 12 Hours and the alert is not cleared, CloudMonitor resends an alert notification after 12 hours.
   Effective Period	The period during which the alert rule is effective. CloudMonitor sends alert notifications based on the alert rule only within the effective period. Note If an alert rule is not effective, no alert notification is sent. However, the alert history is still displayed on the Alert History page.
   Alert Contact Group	The alert contact groups to which alert notifications are sent. The alert notifications of the application group are sent to the alert contacts that belong to the selected alert contact groups. 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.
   Tag	The tag of the alert rule. A tag consists of a key and a value. Note You can set a maximum of six tags.
   Alert Callback	The callback URL that can be accessed over the Internet. CloudMonitor sends HTTP POST requests to push alert notifications to the specified URL. Only the HTTP protocol is supported. For more information about how to configure alert callback, see Use the alert callback feature to send notifications about threshold-triggered alerts. To test the connectivity of an alert callback URL, perform the following steps: Click Test next to the callback URL. In the Webhook Test panel, you can check and troubleshoot the connectivity of the alert callback URL based on the returned status code and test result details. Note To obtain the details of the test result, configure the Test Template Type and Language parameters and click Test. Click Close. Note You can click Advanced Settings to configure this parameter.
   Auto Scaling	If you turn on Auto Scaling, the specified scaling rule is enabled when an alert is triggered. In this case, you must configure the Region, ESS Group, and ESS Rule parameters. For more information about how to create a scaling group, see Manage scaling groups. For more information about how to create a scaling rule, see Manage scaling rules. Note You can click Advanced Settings to configure this parameter.
   Log Service	If you turn on Log Service, the alert information is sent to the specified Logstore when an alert is triggered. In this case, you must configure the Region, ProjectName, and Logstore parameters. For more information about how to create a project and a Logstore, see Getting Started. Note You can click Advanced Settings to configure this parameter.
   Message Service - Topic	If you turn on Message Service - Topic, the alert information is sent to the specified topic in Message Service (MNS) when an alert is triggered. In this case, you must configure the Region and topicName parameters. For more information about how to create a topic, see Create a topic. Note You can click Advanced Settings to configure this parameter.
   Function Compute	If you turn on Function Compute, an alert notification is sent to Function Compute for format processing when an alert is triggered. In this case, you must configure the Region, Service, and Function parameters. For more information about how to create a service and a function, see Quickly create a function. Note You can click Advanced Settings to configure 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. Valid values: Do not do anything (default) Send alert notifications Treated as normal Note You can click Advanced Settings to configure this parameter.

5. Click Confirm.