Create an alert rule

Lindorm supports the following three ways to create alert rules:

• Use the ARMS console (Recommended): Applies to all Lindorm instances in your Alibaba Cloud account.

• Use the Lindorm console (Recommended): Integrates with the ARMS dashboard and applies to a single instance.

• Use the Cloud Monitor console: Create global or instance-specific alert rules.

Prerequisites

• You have created an instance.

• To apply an alert rule to instances in an application group, you must have created an application group and added the instances to it.

Limitations

Only Lindorm V1 and Lindorm instances support creating alert rules. To see if your instance is eligible, you can view the instance type on the console.

Create a global alert rule (ARMS console)

These alert rules apply to all Lindorm instances under your Alibaba Cloud account.

Create an instance-level alert rule

An alert rule created using this method applies only to the current instance.

1. Log on to the Lindorm console. In the upper-left corner of the page, select the region of the instance. On the Instances page, click the ID of the target instance or click View Instance Details in the Actions column for the instance.

2. In the left-side navigation pane, click Alerts to view the alert rules for the instance. On the Lindorm alert list page, you can view created alert rules and their status, and filter them by check type, alert group, and status.

3. Click Create Lindorm Alert Rules.

4. On the Create Lindorm Alert Rules page, configure the following parameters.

   Note

   The required parameters depend on the check type.

   Static threshold

   Parameter	Description
   Alert name	The name of the alert rule.
   Check type	Select Static Threshold.
   Lindorm cluster	The Lindorm instance for which to create the alert rule. This is the current instance.
   Alert group	Select an alert group, such as a group for an engine, a system, or storage. For information about the recommended settings for each engine, see Best practices for alert rules.
   Alert metric	From the drop-down list, select the metric for the alert rule.
   Alert condition	Set the condition that triggers an alert event based on the selected alert metric.
   Filter condition	Specifies conditions to filter which resources the alert rule applies to. An alert is triggered if a resource meets these filter conditions and the alert condition.
   Data preview	The Data preview section plots the monitored metric on a time series curve. By default, this section displays real-time values for the alert metric. Use the filters in this section to view data for different time ranges or resources. Note The alert threshold is displayed as a red line on the time series curve. The parts of the curve that breach the threshold are shown in dark red, and the other parts are displayed in different colors. Hover over the time series curve to view resource details at a specific point in time. On the time series curve, select a time range to zoom in.
   Duration	If an alert condition is met, an alert event is triggered immediately: An alert event is triggered if any data point meets the threshold. An alert event is triggered only after an alert condition persists for N minutes: An alert event is triggered only if the time that the threshold is met is greater than or equal to N minutes.
   Alert level	Customize the alert level. The severity levels, from lowest to highest, are Default, P4, P3, P2, and P1.
   Alert content	Defines the content for alert notifications. You can use Go template syntax to include variables in the alert content.
   Alert notification	Two modes are available: Simple Mode and Normal Mode. Simple Mode: Set notification recipients, notification periods, and alert repeat policies. Normal mode: You can quickly select an existing notification policy. You can also click New Notification Policy to create a new notification policy. For more information, see Create a notification policy.
   Check interval	The frequency for evaluating the alert condition. The default and minimum value is 1 minute.
   Check after data is complete	Specifies whether to evaluate the alert rule only after data collection is complete. The default value is Yes. The default setting is recommended for most use cases.
   Label	Labels to attach to the alert rule. These labels can be used as matching criteria in notification policies.
   Annotation	Annotations to attach to the alert rule.

   Custom PromQL

   Parameter	Description
   Alert name	The name of the alert rule.
   Check type	Select Custom PromQL.
   Lindorm cluster	The Lindorm instance for which to create the alert rule. This is the current instance.
   Reference alert group	This option is not supported for Lindorm instances.
   Custom PromQL statement	The PromQL expression that defines the alert condition.
   Data preview	The Data Preview section plots the time series for metrics that match the PromQL expression. By default, this section displays data for all resources matching the PromQL expression. You can filter the view by selecting a specific resource or time range. Note Hover the mouse over the time series curve to view resource details for a specific data point. Select a time range on the curve to view the time series for that period.
   Duration	If an alert condition is met, an alert event is triggered immediately: An alert event is triggered if any data point meets the threshold. An alert event is triggered only after an alert condition persists for N minutes: An alert event is triggered only if the time that the threshold is met is greater than or equal to N minutes.
   Alert level	The severity of the alert. The levels, from lowest to highest, are Default, P4, P3, P2, and P1. The default level is Default.
   Alert content	Defines the content for alert notifications. You can use Go template syntax to include variables in the alert content.
   Alert notification	Two modes are available: Simple Mode and Normal Mode. Simple Mode: Set notification recipients, notification periods, and alert repeat policies. Normal mode: You can quickly specify an existing notification policy. You can also click New Notification Policy to create a new notification policy. For more information, see Create a notification policy.
   Check interval	The frequency for evaluating the alert condition. The default and minimum value is 1 minute.
   Check after data is complete	Specifies whether to evaluate the alert rule only after data collection is complete. The default value is Yes. The default setting is recommended for most use cases.
   Label	Labels to attach to the alert rule. These labels can be used as matching criteria in notification policies.
   Annotation	Annotations to attach to the alert rule.

Create a global or instance-level alert rule (Cloud Monitor console)

You can use Cloud Monitor to create an alert rule for all instances or a specific instance in your Alibaba Cloud account.

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 following parameters.

   Parameter	Description
   Product	Select Lindorm.
   Resource Range	The resources to which the alert rule applies. Valid values: All Resources: Indicates that the rule applies to all instances of Lindorm under the current Alibaba Cloud account. Application Groups: Specifies that the rule applies to all instances within the specified application group of Lindorm. Instances: The rule applies to a specific Lindorm instance.
   Rule Description	The core settings of the alert rule. An alert is triggered when monitoring data meets the alert condition. Configure the rule as follows: Click Add Rule. In the Add Rule Description panel, configure parameters such as the rule name, metric type, monitoring metric, dimension, threshold, alert level, and alert notification method. Click Determine.
   Related Resource	Select the application group name or instance ID of Lindorm. Note This parameter is required when Application Groups is set to Instances or Instance.
   Mute Period	The period during which repeated alerts for the same issue are suppressed. Valid values: 5 minutes, 15 minutes, 30 minutes, 60 minutes, 3 hours, 6 hours, 12 hours, and 24 hours. When a monitoring metric crosses the alert threshold, Cloud Monitor sends an alert notification. If the metric continues to exceed the threshold during the silence period, Cloud Monitor does not send duplicate notifications. If the metric is still abnormal after the silence period ends, Cloud Monitor sends another notification. Note Click Advanced Settings to configure this parameter.
   Effective Period	The period during which the alert rule is active. The rule checks monitoring data and triggers alerts only during this period. Note Click Advanced Settings to configure this parameter.
   Tag	Tags for the alert rule, specified as key-value pairs.
   Alert Contact Group	The alert contact group that receives alert notifications. Alert notifications are sent to the contacts in this alert contact group. A group can include one or more alert contacts. For more information about how to create alert contacts and alert contact groups, see Create an alert contact or an alert contact group.
   Alert Callback	Pushes alert notifications to a specified URL by using an HTTP or HTTPS POST request. For more information about how to use alert callbacks, see Use threshold-triggered alert callbacks.
   Auto Scaling	Turn on Auto Scaling to trigger a scaling rule when an alert occurs. You must specify the region, scaling group, and scaling rule. For more information about how to create a scaling group, see Configure a scaling group. For more information about how to create a scaling rule, see Configure a scaling rule.
   Simple Log Service	Turn on Simple Log Service to write alert information to a Log Service Logstore when an alert occurs. You must specify the region, Project, and Logstore. For more information about how to create a Project and a Logstore, see Use LoongCollector to collect and analyze text logs from ECS instances.
   Simple Message Queue (formerly MNS) - Topic	Turn on Simple Message Queue (formerly MNS) - Topic to send alert information to a Message Service (MNS) topic when an alert occurs. You must specify the region and topic. For more information about how to create a topic, see Create a topic.
   method for handling no data	Specifies how Cloud Monitor handles alerts when no monitoring data is available. Valid values: Do not do anything (default) Send alert notifications Treat as recovered

5. After configuring the parameters, click Determine.