Configure a data collection rule for Prometheus Monitoring to monitor the application

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

1. In the left-side navigation pane, click Prometheus Monitoring.
2. Find the target cluster, and clickSettings in the Actions column.
3. You can configure the data collection rule for Prometheus Monitoring to monitor the application in the following scenarios:
   • To monitor the business data of applications deployed in the Kubernetes cluster, such as order information, you can click Add ServiceMonitor on the Details tab. In the Add ServiceMonitor dialog box, enter the following information:

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

   • To monitor business data outside the Kubernetes cluster, such as the number of Redis connections, you can click Edit prometheus.yaml on the Details tab to configure the native prometheus.yaml file. In the Edit prometheus.yaml dialog box, enter the following information:

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