kubevela/documentation/samples/metrics-demo/appConfig.yaml

apiVersion: core.oam.dev/v1alpha2
kind: ApplicationConfiguration
metadata:
  name: sample-application-with-metrics
spec:
  components:
    - componentName: autoscale-application
      traits:
        - trait:
            apiVersion: standard.oam.dev/v1alpha1
            kind: MetricsTrait
            spec:
              scrapeService:
                format: "prometheus"
                port: 8080
                path: "/metrics"
                scheme:  "http"
                enabled: true
        - trait:
            apiVersion: core.oam.dev/v1alpha2
            kind: ManualScalerTrait
            metadata:
              name:  example-appconfig-trait
            spec:
              replicaCount: 3
    - componentName: metrics-application
      traits:
        - trait:
            apiVersion: standard.oam.dev/v1alpha1
            kind: MetricsTrait
            spec:
              scrapeService:
                port: 8080