CloudMonitor:Create an alert rule

Procedure

1. Log on to the CloudMonitor console.

2. In the left-side navigation pane, choose Hybrid Cloud Monitoring > Namespace.

3. On the Namespace page, click Create Alert Rule in the upper-left corner.

4. In the Create Alert Rule panel, configure the parameters. The following table describes the parameters.

   Parameter	Description
   Alert Rule	The name of the alert rule.
   Namespace	The namespace of metrics. The alert rule takes effect only on the metrics that belong to the specified namespace.
   Alert Expression (PromQL)	The condition that triggers alerts. If a metric meets the specified condition, an alert is triggered.
   Tag	The tags of the alert rule. You can set the key and value of each tag.
   Annotations	The annotations of the alert rule. You can set the key and value of each annotation.
   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 monitors the specified resources based on the alert rule only within the specified period.
   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.
   Notification Methods	The alert level and the methods that are used to send alert notifications. Valid values: Info (Email + Webhook) You can specify the consecutive periods of time during which the metric value exceeds the threshold before an alert is triggered. Valid values of the consecutive cycles: 1, 3, 5, 10, 15, 30, 60, 70, 90, 120, and 180. One consecutive cycle is equal to 1 minute.
   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. You can enter only an HTTP URL. 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.
   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 information about how to create a scaling group, see Manage scaling groups. For information about how to create a scaling rule, see Manage scaling rules.
   Log Service	If you turn on Log Service, the alert information is written to the specified Logstore in Simple Log Service 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.
   Message Service - topic	If you turn on Message Service - topic, the alert information is written 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 information about how to create a topic, see Create a topic.
   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 information about how to create a service and a function, see Quickly create a function.
   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 Send alert notifications Treated as normal (default)

5. Click OK.

6. View the created alert rule.

   In the left-side navigation pane, choose Alerts > Alert Rules.

   On the Alert Rules page, the alert rule whose Product Name is Prometheus is the one that you created.