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Java Application with JVM Metrics to Dock Insight

If your Java application exposes JVM monitoring metrics through other means (such as Spring Boot Actuator), We need to allow monitoring data to be collected. You can let Insight collect existing JVM metrics by adding Kubernetes Annotations to the workload:

annatation:
   insight.opentelemetry.io/metric-scrape: "true" # whether to collect
   insight.opentelemetry.io/metric-path: "/" # path to collect metrics
   insight.opentelemetry.io/metric-port: "9464" # port for collecting metrics

YAML Example to add annotations for my-deployment-app workload： 

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment-app
spec:
  selector:
    matchLabels:
      app: my-deployment-app
      app.kubernetes.io/name: my-deployment-app
  replicas: 1
  template:
    metadata:
      labels:
        app: my-deployment-app
        app.kubernetes.io/name: my-deployment-app
      annotations:
        insight.opentelemetry.io/metric-scrape: "true" # whether to collect
        insight.opentelemetry.io/metric-path: "/" # path to collect metrics
        insight.opentelemetry.io/metric-port: "9464" # port for collecting metrics

The following shows the complete YAML: 

---
apiVersion: v1
kind: Service
metadata:
  name: spring-boot-actuator-prometheus-metrics-demo
spec:
  type: NodePort
  selector:
    #app: my-deployment-with-aotu-instrumentation-app
    app.kubernetes.io/name: spring-boot-actuator-prometheus-metrics-demo
  ports:
    - name: http
      port: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: spring-boot-actuator-prometheus-metrics-demo
spec:
  selector:
    matchLabels:
      #app: my-deployment-with-aotu-instrumentation-app
      app.kubernetes.io/name: spring-boot-actuator-prometheus-metrics-demo
  replicas: 1
  template:
    metadata:
      labels:
        app.kubernetes.io/name: spring-boot-actuator-prometheus-metrics-demo
      annotations:
        insight.opentelemetry.io/metric-scrape: "true" # whether to collect
        insight.opentelemetry.io/metric-path: "/actuator/prometheus"      # path to collect metrics
        insight.opentelemetry.io/metric-port: "8080"   # port for collecting metrics
    spec:
      containers:
        - name: myapp
          image: docker.m.daocloud.io/wutang/spring-boot-actuator-prometheus-metrics-demo
          ports:
            - name: http
              containerPort: 8080
          resources:
            limits:
              cpu: 500m
              memory: 800Mi
            requests:
              cpu: 200m
              memory: 400Mi

In the above example，Insight will use :8080//actuator/prometheus to get Prometheus metrics exposed through Spring Boot Actuator .

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