Container Service for Kubernetes:Set up alerting for a registered cluster

1. Log on to the ACK console. In the left navigation pane, click Clusters.

2. On the Clusters page, find the cluster you want and click its name. In the left-side pane, choose Operations > Alerts.

3. On the Alert Rule Management tab, click Edit Alert Configuration in the upper-right corner. Then, click Actions > YAML in the row of the target rule to view the AckAlertRule resource configuration of the current cluster.

4. Refer to the description of the default alert rule template and modify the sample YAML file.

   Example:

   apiVersion: alert.alibabacloud.com/v1beta1
   kind: AckAlertRule
   metadata:
     name: default
   spec:
     groups:
       # The following is a sample configuration of a cluster event alert rule.
       - name: pod-exceptions                             # The name of the alert rule group, which corresponds to the Group_Name field in the alert template.
         rules:
           - name: pod-oom                                # The name of the alert rule.
             type: event                                  # The type of the alert rule (Rule_Type). Valid values: event and metric-cms.
             expression: sls.app.ack.pod.oom              # The expression of the alert rule. When the rule type is event, the value of the expression is the value of Rule_Expression_Id in the default alert rule template described in this topic.
             enable: enable                               # The status of the alert rule. Valid values: enable and disable.
           - name: pod-failed
             type: event
             expression: sls.app.ack.pod.failed
             enable: enable
       # The following is a sample configuration of a cluster basic resource alert rule.
       - name: res-exceptions                              # The name of the alert rule group, which corresponds to the Group_Name field in the alert template.
         rules:
           - name: node_cpu_util_high                      # The name of the alert rule.
             type: metric-cms                              # The type of the alert rule (Rule_Type). Valid values: event and metric-cms.
             expression: cms.host.cpu.utilization          # The expression of the alert rule. When the rule type is metric-cms, the value of the expression is the value of Rule_Expression_Id in the default alert rule template described in this topic.
             contactGroups:                                # The alert contact group configuration that is mapped to the alert rule. The configuration is generated by the ACK console. The same contact is used for the same account. The contact can be reused in multiple clusters.
             enable: enable                                # The status of the alert rule. Valid values: enable and disable.
             thresholds:                                   # The threshold of the alert rule. For more information, see the section about how to change the threshold of an alert rule.            
               - key: CMS_ESCALATIONS_CRITICAL_Threshold
                 unit: percent
                 value: '1'

Example: Modify the threshold of a cluster basic resource alert rule by using a CRD

Based on the default alert rule template set, the Rule_Type of the cluster resource exception alert rule set is metric-cms, and the alert rule is synchronized from the basic resource alert rule of CloudMonitor. In this example, the thresholds parameter is added to the CRD that corresponds to the Node - CPU usage alert rule set to configure the threshold, the number of retries, and the silence period of the basic monitoring alert rule.

apiVersion: alert.alibabacloud.com/v1beta1
kind: AckAlertRule
metadata:
  name: default
spec:
  groups:
    # The following is a sample configuration of a cluster basic resource alert rule.
    - name: res-exceptions                                        # The name of the alert rule group, which corresponds to the Group_Name field in the alert template.
      rules:
        - name: node_cpu_util_high                                # The name of the alert rule.
          type: metric-cms                                        # The type of the alert rule (Rule_Type). Valid values: event and metric-cms.
          expression: cms.host.cpu.utilization                    # The expression of the alert rule. When the rule type is metric-cms, the value of the expression is the value of Rule_Expression_Id in the default alert rule template described in this topic.
          contactGroups:                                          # The alert contact group configuration that is mapped to the alert rule. The configuration is generated by the ACK console. The same contact is used for the same account. The contact can be reused in multiple clusters.
          enable: enable                                          # The status of the alert rule. Valid values: enable and disable.
          thresholds:                                             # The threshold of the alert rule. For more information, see how to configure alert rules by using CRDs.
            - key: CMS_ESCALATIONS_CRITICAL_Threshold
              unit: percent
              value: '1'  
            - key: CMS_ESCALATIONS_CRITICAL_Times
              value: '3'  
            - key: CMS_RULE_SILENCE_SEC
              value: '900'