Use CloudMonitor to monitor service status

View monitoring data

1. Log on to the CloudMonitor console.
2. In the left-side navigation pane, click Cloud Service Monitoring and then E-MapReduce.
3. On the Clusters tab of the E-MapReduce Monitoring List page, find the target cluster and click the cluster ID or Monitoring Charts in the Actions column.
4. Click a time range above the monitoring charts or click the Custom icon to customize a time range.
   You can view the monitoring data from a maximum of seven consecutive days.

Create an alert rule

Follow these steps to create an alert rule:

1. Log on to the CloudMonitor console.
2. In the left-side navigation pane, click Cloud Service Monitoring and then E-MapReduce.
3. On the Clusters tab of the E-MapReduce Monitoring List page, find the target cluster and click Alarm Rules in the Actions column.
4. Click Create Alarm Rule in the upper-right corner or click here in the message that prompts you to create an alert rule.
   1. In the Related Resource section, specify Resource Range.
      If you select All Resources for Resource Range, CloudMonitor sends an alert notification when any of the clusters under your account meets the alert rule. If you select Cluster, you need to specify a cluster. In this case, CloudMonitor sends an alert notification only when the specified cluster meets the alert rule. If you want to create an alert rule that applies to an application group, see Application group.
   2. In the Set Alarm Rules section, set an alert rule.

      Set the required parameters. For the metrics of core services, see Metrics of core services.

      For example, to trigger an alert when the HTTP port of DataNodes is unreachable for longer than five minutes, select the DataNodeHttpPortOpen metric and specify the other parameters, as shown in the following figure.

      

      Note If you select All from the role drop-down list, the alert rule applies to all nodes in the cluster, including nodes that are added to the cluster in the future.
   3. In the Notification Method section, set Notification Contact and Notification Methods.
      Notification Contact must be set to one or more contact groups. You can click Quickly create a contact group to create a contact group.

      You can set Notification Methods to a combination of two or more of the following methods: phone calls, text messages, emails, and DingTalk chatbot. To use the phone call method, you must purchase a phone alert resource plan.

   4. Click Confirm.

Metrics of core services