Configure a data collection rule for Prometheus Monitoring

You can edit the prometheus.yaml file or add ServiceMonitor to configure a data collection rule. Then, Prometheus Monitoring can use the rule to monitor an application.

1. Log on to the Prometheus console.
2. In the upper-left corner of the Prometheus Monitoring page, select the region where your Container Service for Kubernetes (ACK) clusters reside. Find the cluster that you want to manage and click Settings in the Actions column.
3. Configure data collection rules for ARMS Prometheus Monitoring to monitor the application in the following scenarios:
   • To monitor the business data of the application deployed in the cluster, such as order information, you can click Add ServiceMonitor on the Service Discovery tab. In the Add ServiceMonitor dialog box, reference the following content to enter the text and click OK:

     apiVersion: monitoring.coreos.com/v1
     kind: ServiceMonitor
     metadata:
       #  Enter a unique name.
       name: tomcat-demo
       #  Enter a namespace.
       namespace: default
     spec:
       endpoints:
       - interval: 30s
         #  Enter the value of the Name field for Port of Prometheus Exporter in the service.yaml file.
         port: tomcat-monitor
         #  Enter the value of the Path field for Prometheus Exporter.
         path: /metrics
       namespaceSelector:
         any: true
         #  The namespace of Demo.
       selector:
         matchLabels:
           # Enter the value of the Label field in the service.yaml file to find the service.yaml file.
           app: tomcat

   • To monitor business data outside the cluster, such as the number of Redis connections, you can reference the following content to enter the text on the Prometheus Settings tab and click Save:

     global:
       scrape_interval:     15s
       evaluation_interval: 15s
     scrape_configs:
       - job_name: 'prometheus'
         static_configs:
         - targets: ['localhost:9090']