Cloud Monitor supports monitoring on Elastic Compute Service (ECS) instances and third-party hosts. This topic describes how to configure an alert rule to monitor an ECS instance. In this example, the CPU Utilization metric is specified as the alert condition for the alert rule.
Prerequisites
An ECS instance is created. For more information, see Creation methods.
An alert contact group is created. For more information, see Create an alert contact or alert contact group.
Step 1: Check whether the Cloud Monitor agent is installed on the host
After you create an ECS instance in the ECS console, the host is displayed in the Host Monitoring list of the Cloud Monitor console. Before Cloud Monitor can monitor an ECS instance, you must install the Cloud Monitor agent on the ECS instance.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
Check whether the Cloud Monitor agent is installed on the ECS instance that you created.
If the Cloud Monitor agent is installed, perform Step 2: Create an alert rule for the host.
If Running is displayed in the argusagent Status column of the ECS instance, the Cloud Monitor agent is installed.
If the Cloud Monitor agent is not installed, manually install the Cloud Monitor agent on the ECS instance. For more information, see Automatic installation (recommended).
If Reinstall/Upgrade is displayed in the argusagent Status column of the ECS instance, the Cloud Monitor agent is not installed.
For more information about monitoring of third-party hosts, see Manage a Cloud Monitor agent.
For more information about how to delete third-party hosts from host monitoring, see What do I do If a third-party host fails to be deleted from the Host Monitoring list?
Step 2: Create an alert rule for the host
When you view the metrics for the ECS instance, you can create an alert rule for the ECS instance. If the value of the specified metric meets the specified alert condition, an alert is triggered and Cloud Monitor sends an alert notification. This helps you monitor the metric status in real time.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Host Monitoring page, click the name of the host that you want to manage.
On the Host Monitoring Details page, click the
icon in the CPU Utilization(%) section. In the Configure Rule Description panel, enter a rule name in the Alert Rule field, configure the Metric Type, Metric, and Threshold and Alert Level parameters, and then click OK.
Alert level
Default alert notification method
Critical
Email + Webhook
Warn
Email + Webhook
Info
Email + Webhook
In the Create Alert Rule panel, specify an alert contact group. Use the default values for other parameters.
NoteIf an alert contact is configured with only an email address or webhook URL, the alert contact can receive alert notifications only by using emails or webhooks.
Click Confirm.
For information about how to modify, disable, enable, and delete an alert rule, see Manage alert rules.
For more information about how to configure an alert rule, see Create an alert rule.
Step 3: View host alerts
After an alert rule is created, you can perform the following operations to view the alert rule and alert status.
Log on to the Cloud Monitor console.
In the left-side navigation pane, choose .
On the Alert Rules page, view the required alert rule and alert status.
If the status of the alert rule is Normal, no alert is triggered.
If the alert rule is in the Alert state, alerts are triggered and alert notifications are already sent. You can also view the historical alerts of the alert rule. For more information, see View historical alerts.