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apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    app: metallb
    component: speaker
  name: speaker
  namespace: metallb-system
spec:
  selector:

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jmx:
  per_process_beans:
    systemStatus:
      pattern: "Main"
      beans:
        - query: "com.sysdig.app:name=SystemStatusExample"
          attributes:
            - name: NumberOfSecondsRunning
              alias: java.app.numberOfSecondsRunning
            - name: NumberOfUnixSecondsRunning

tembleking

import javax.management.*;
import java.lang.management.ManagementFactory;

public class Main {
   public static void main(String[] args) {
       try {
           String programName = (args.length == 0) ? "Java" : args[0];

           // Initialize the object
           SystemStatus systemStatus = new SystemStatus(programName);

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public class SystemStatus implements SystemStatusMBean {
   private Integer numberOfSecondsRunning;
   private String programName;
   private Long numberOfUnixSecondsRunning;
   private Boolean switchStatus;
   private Thread backgroundThread;

   public SystemStatus(String programName) {
       // First we initialize all the metrics
       this.backgroundThread = new Thread();

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public interface SystemStatusMBean {
   Integer getNumberOfSecondsRunning();
   String getProgramName();
   Long getNumberOfUnixSecondsRunning();
   Boolean getSwitchStatus();
}

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 - name: go-expvar
    check_module: go_expvar
    pattern:
          comm: go-expvar
    conf:
      expvar_url: "http://localhost:8080/debug/vars" # automatically match url using the listening port
      # Add custom metrics if you want
      metrics:
        - path: system.numberOfSeconds
            type: gauge # gauge or rate

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$ curl localhost:8080/debug/vars
{
  "cmdline": [
    "/go-expvar"
  ],
  "memstats": {
    "Alloc": 878208,
    "TotalAlloc": 878208,
    "Sys": 3084288,
    "Lookups": 277,

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package main

import (
  "expvar"
  "net/http"
  "time"
  "os"
  "io/ioutil"
  "strings"
  "strconv"

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import prometheus_client as prom
import random
import time
from threading import Thread

from flask import Flask, request
from flask_prometheus import monitor

req_summary = prom.Summary('python_my_req_example', 'Time spent processing a request')

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import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import io.prometheus.client.*;
import io.prometheus.client.exporter.HTTPServer;
import io.prometheus.client.hotspot.DefaultExports;

import java.io.IOException;
import java.net.InetSocketAddress;