docker - 普罗米修斯未公开自定义指标

Question

我正在编写Go应用程序，并且需要使用Prometheus记录一些自定义指标。我有Prometheus的本地实例，这是我的prometheus.yml文件:

scrape_configs:
- job_name: myapp
  scrape_interval: 10s
  static_configs:
  - targets:
    - localhost:2112

这是我的Go代码:

package main

import (
    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promauto"
    "github.com/prometheus/client_golang/prometheus/promhttp"

    "net/http"
    "time"
)

func recordMetrics() {
    go func() {
        for {
            opsProcessed.Inc()
            time.Sleep(2 * time.Second)

        }
    }()
}

var (
    opsProcessed = promauto.NewCounter(prometheus.CounterOpts{
        Name: "myapp_processed_ops_total",
        Help: "The total number of processed events",
    })
)

func main() {
    recordMetrics()

    http.Handle("/metrics", promhttp.Handler())
    http.ListenAndServe(":2112", nil)
}

如您所见，我定义了一个自定义指标opsProcessed，其名称为myapp_processed_ops_total。我可以在http://localhost:2112/metrics上看到myapp_processed_ops_total。但是，我在Prometheus实例上看不到该指标。

问题是什么？
我认为我的服务器已被删除，因为我可以在Prometheus中看到其他指标，例如scrape_duration_seconds:

也许问题出在我的docker-compose文件中，用于prometheus。这是prometheus UI中的目标页面:

这是我的docker-compose文件:

version: '2.1'

networks:
  monitor-net:
    driver: bridge

volumes:
    prometheus_data: {}
    grafana_data: {}

services:

  prometheus:
    image: prom/prometheus:v2.15.2
    container_name: prometheus1
    volumes:
      - ./prometheus:/etc/prometheus
      - prometheus_data:/prometheus
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'
      - '--storage.tsdb.path=/prometheus'
      - '--web.console.libraries=/etc/prometheus/console_libraries'
      - '--web.console.templates=/etc/prometheus/consoles'
      - '--storage.tsdb.retention.time=200h'
      - '--web.enable-lifecycle'
    restart: unless-stopped
    expose:
      - 9090
    ports:
      - "9090:9090"
    networks:
      - monitor-net
    labels:
      org.label-schema.group: "monitoring"

  grafana:
    image: grafana/grafana:6.5.3
    container_name: grafana1
    volumes:
      - grafana_data:/var/lib/grafana
      - ./grafana/provisioning:/etc/grafana/provisioning
    environment:
      - GF_SECURITY_ADMIN_USER=${ADMIN_USER:-admin}
      - GF_SECURITY_ADMIN_PASSWORD=${ADMIN_PASSWORD:-admin}
      - GF_USERS_ALLOW_SIGN_UP=false
    restart: unless-stopped
    ports:
      - "3000:3000"
    networks:
      - monitor-net
    labels:
      org.label-schema.group: "monitoring"

Answer 1

scrape_configs:
- job_name: myapp
  scrape_interval: 10s
  static_configs:
  - targets:
  - localhost:2112

如果您的应用是普罗米修斯的辅助工具，则可以使用localhost；
如果没有，您必须在这里使用其服务