start java application with jmx-exporter with a problem

[lvdb-wuzihong]

When my Java application uses jmx-exporter as the javaagent, the Java application starts normally, but the javaagent's interface does not take effect. That is, jmx-exporter does not appear to be started properly. My jmx-exporter config file is as follows:

startDelaySeconds: 0
ssl: false
username:
password:
lowercaseOutputName: false
lowercaseOutputLabelNames: false
rules: 
  - pattern: ".*"

[lvdb-wuzihong]

my Dockerfile write as follows(created from Jenkins pipeline):

script{
                        jar_name = sh (returnStdout: true, script: 'ls service/target/ | grep \'.jar\' | grep -v \'sources\' | head -n 1').trim()
                        sh """
                        rm Dockerfile -rf
                        JAR_NAME=${jar_name}
                        echo 'FROM ubuntu:16.04 as jar' >> Dockerfile
                        echo 'WORKDIR /' >> Dockerfile
                        echo 'RUN apt-get update -y'  >> Dockerfile
                        echo 'RUN DEBIAN_FRONTEND=noninteractive apt-get install -y wget' >> Dockerfile
                        echo 'RUN wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.20.0/jmx_prometheus_javaagent-0.20.0.jar' >> Dockerfile
                        echo 'FROM openjdk:11' >> Dockerfile
                        echo \"ADD service/target/\${JAR_NAME} /app/\${JAR_NAME}\" >> Dockerfile
                        echo 'COPY --from=jar /jmx_prometheus_javaagent-0.20.0.jar /app/jmx_prometheus_javaagent-0.20.0.jar' >> Dockerfile
                        echo 'ENV TZ=Asia/Shanghai' >> Dockerfile
                        echo 'EXPOSE 8088' >> Dockerfile
                        echo 'EXPOSE 8910' >> Dockerfile
                        echo 'ENTRYPOINT ["java", "-jar", "/app/${jar_name}"]' >> Dockerfile
                        """
                        sh '''
                        tag=`date +%s`;docker build -t harbor.xxx.com/develop/app:${tag} .
                        docker push harbor.xxx.com/develop/app:${tag}
                        kubectl set image deployment/app app=harbor.xxx.com/develop/app:$tag -n develop
                        '''
                    }

And my deployment.yaml's template as follows:

  template:
    metadata:
      labels:
        app: app
    spec:
      volumes:
        - name: config
          configMap:
            name: app-cm
            defaultMode: 420
        - name: log
          emptyDir: {}
        - name: jmx-exporter
          configMap:
            name: jmx-exporter
            items:
              - key: jmx_exporter.yaml
                path: jmx_exporter.yaml
            defaultMode: 420
      containers:
        - name: promtail
          image: 'docker.io/bitnami/promtail:2.8.4-debian-11-r0'
          args:
            - '-config.file=/etc/promtail/promtail.yaml'
          resources: {}
          volumeMounts:
            - name: config
              mountPath: /etc/promtail/
            - name: log
              mountPath: /logs/
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          imagePullPolicy: IfNotPresent
        - name: app
          image: 'harbor.xxx.com/develop/app:1698393685'
          args:
            - >-
              -javaagent:/app/jmx_prometheus_javaagent-0.20.0.jar=8088:/app/jmx_exporter.yaml
            - '--spring.config.location=/app/config/bootstrap.yml'
          ports:
            - containerPort: 8910
              protocol: TCP
            - containerPort: 8088
              protocol: TCP
          env:
            - name: PROPERTIES_PATH
              value: /app/config/tinyid_client.properties
          resources:
            limits:
              cpu: 500m
              memory: 800Mi
            requests:
              cpu: 100m
              memory: 400Mi
          volumeMounts:
            - name: config
              mountPath: /app/config
            - name: log
              mountPath: /logs/
            - name: jmx-exporter
              mountPath: /app/jmx_exporter.yaml
              subPath: jmx_exporter.yaml
          livenessProbe:
            tcpSocket:
              port: 8910
            initialDelaySeconds: 10
            timeoutSeconds: 5
            periodSeconds: 60
            successThreshold: 1
            failureThreshold: 5
          readinessProbe:
            tcpSocket:
              port: 8910
            initialDelaySeconds: 10
            timeoutSeconds: 5
            periodSeconds: 10
            successThreshold: 1
            failureThreshold: 5
          imagePullPolicy: IfNotPresent

[dhoard]

The exporter YAML file does not need the following configuration when running as a Java agent.

ssl: false
username:
password:

Bash into the POD and check that...

1. netstat shows a process listening on port 8080
2. provide the actual command line of the process