有没有办法用Prometheus和Grafana监控Apache服务器？

Question

我的要求是使用Prometheus和Grafana监视包含Apache的Linode虚拟机。（PS-普罗米修斯和格拉法纳在一个单独的Linode虚拟机中运行）

我使用以下文档安装Apache exporter：https://www.techbeginner.in/2021/01/install-and-configure-apache-node.html.服务文件如下所示：

[Unit]
Description=Prometheus
Documentation=https://github.com/Lusitaniae/apache_exporter
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=prometheus
Group=prometheus
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/local/bin/apache_exporter \
  --insecure \
  --scrape_uri=http://localhost/server-status/?auto \
  --telemetry.address=0.0.0.0:9117 \
  --telemetry.endpoint=/metrics

SyslogIdentifier=apache_exporter
Restart=always

[Install]
WantedBy=multi-user.target

我已将--scrape_uri更改为http://usr_name:password@本地主机/服务器状态/？自动\和--遥测。地址127.0.0.1:9117，但我相信这不会有任何区别。普罗米修斯能够搜集数据。但是当我导入一个grafana仪表板（ID-3894）来可视化数据时，我没有得到任何数据。在整个仪表板中的7个面板（当前发送的总KB、当前的总apache访问量、apache记分板状态、apache worker状态、apache CPU负载、正常运行时间和apache Up/Down）中，我可以看到apache Up/Down的图形。其他6人说没有可用的数据。

这是prometheus.yml配置：

#Apache Servers
  - job_name: apache-web-server
    static_configs:
      - targets: ['x.x.x.x:9117']
        labels:
          alias: server-apache

PS-两个Linode实例都包含Debian GNU/Linux 9.8（stretch）作为其操作系统。

我错过了什么？我怎样才能得到其余面板的图表？非常感谢您的帮助。先谢谢你。

Answer 1

从您提到的内容来看，您似乎没有设置ExtendedStatus。

在这里查看：https://httpd.apache.org/docs/2.4/mod/mod_status.html.

The details given are:

The number of workers serving requests
The number of idle workers
The status of each worker, the number of requests that worker has     performed and the total number of bytes served by the worker (*)
A total number of accesses and byte count served (*)
The time the server was started/restarted and the time it has been running for
Averages giving the number of requests per second, the number of bytes served per second and the average number of bytes per request (*)
The current percentage CPU used by each worker and in total by all workers combined (*)
The current hosts and requests being processed (*)

The lines marked "(*)" are only available if ExtendedStatus is On. 

一个适用于我的示例配置涵盖了所有指标：

ExtendedStatus On

<Location /server-status>
SetHandler server-status
Order deny,allow
Deny from all
Allow from localhost
</Location>

也就是说，ExtendedStatus从2.3.6默认打开。我猜您使用的是比这个版本更低的Apache版本。

旁注：我写了一篇文章，涵盖了监控Apache的大部分方面，包括粒度流量指标：https://www.giffgaff.io/tech/monitoring-apache-with-prometheus

它还涵盖了使用ExtendedState的Apache配置。