goaccess 通过jsonpath 转换为prometheus metrics

goaccess 是一个不错的日志分析工具，包含了json 数据同时支持基于websocket 的实时数据处理，当然我们可以通过jsonpath
的exporter 转换为支持promethues 的metrics，还是很方便的

环境准备

• docker-compose 文件

version: "3"
services:
  metrics:
   image: sunbird/prometheus-jsonpath-exporter
   volumes:
   - "./conf/config.yml:/etc/prometheus-jsonpath-exporter/config.yml"
   ports:
   - "9158:9158"
   command: /etc/prometheus-jsonpath-exporter/config.yml
  g:
    image: grafana/grafana
    ports:
    - "3000:3000"
  p:
    image: prom/prometheus
    volumes:
    - "./conf/prometheus.yml:/etc/prometheus/prometheus.yml"
    ports:
    - "9090:9090"
  log:
    image: dalongrong/goaccess-geo
    ports:
    - "7890:7890"
    volumes:
    - "./data:/srv/data"
    - "./logs:/srv/logs"
    - "./html:/srv/report"
    - "./geoip/:/src/geoip/"
  web:
    image: nginx
    ports:
    - "8080:80"
    volumes:
    - "./html/:/usr/share/nginx/html/"

• prometheus 配置

  conf/prometheus.yml

scrape_configs:
  - job_name: go_access
    metrics_path: /
    static_configs:
      - targets: ['metrics:9158']

• jsonpath exporter 配置

  conf/config.yml

exporter_port: 9158 # Port on which prometheus can call this exporter to get metrics
log_level: info
json_data_url: http://web/app.json # Url to get json data used for fetching metric values
metric_name_prefix: go_access # All metric names will be prefixed with this value
metrics:
- name: total_request # Final metric name will be go_access_total_request
  description: Number of total request
  path: $.general.total_requests

• goaccess 配置

  主要是添加支持json 的处理data/goaccess.conf

geoip-database /src/geoip/GeoLiteCity.dat
log-format COMBINED
real-time-html true
log-file /srv/logs/access.log
output /srv/report/index.html
output /srv/report/app.json

• 说明
  metrics 很简单，就是通过jsonpath 获取请求的总数

运行&&测试

• 启动

docker-compose up -d

• 效果
  goaccess
  
  jsonpath exporter metrics
  
  prometheus
  

说明

这个只是一种简单的处理实际上我们可以基于其他的nginx 或者logger exporter 进行prometheus metrics 的处理，对于需要进行离线日志请求分析的，
也是一种不错的方案，需要的操作比较少，但是可以帮助我们分析好多有用的信息

参考资料

https://github.com/project-sunbird/prometheus-jsonpath-exporter
https://github.com/rongfengliang/goaccess-geoip-docker-compose-demo
https://goaccess.io/
https://goessner.net/articles/JsonPath/index.html#e2