Prometheus系列之监控Nginx服务

prometheus监控nginx有两种方式。一种是通过nginx_exporter监控，需要开启nginx_stub_status，主要是nginx自身的status信息，metrics数据现对较少；另外一种使用nginx-vts-exporter监控，但是需要在编译nginx的时候添加nginx-module-vts模块，监控数据较多，提供了包含server、upstream以及cache的相关监控指标，指标更丰富，所以采用nginx-vts-exporter实现对nginx的监控。

环境信息

Nginx : openresty 1.27.1 Prometheus : 3.2.1 operating system : RockyLinux 9.5 Mini

nginx-vts-exporter

  1. 下载nginx-module-vts模块
    [root@openresty-dev software]#  git clone https://github.com/vozlt/nginx-module-vts.git
  2. 编译nginx添加nginx-module-vts模块支持
    [root@openresty-dev software]#  ./configutre --prefix=/usr/local/openresty ...现有module..  --add-module=/data/software/nginx-module-vts
  3. 修改vhost配置文件，添加nginx-module-vts相关配置
    [root@openresty-dev software]# vim /usr/local/openresty/nginx/conf/nginx.conf
vhost_traffic_status_zone;
vhost_traffic_status_filter_by_host on;
    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;

        }
...
[root@openresty-dev software]# nginx  -t
[root@openresty-dev software]# nginx -s reload

​ 重载nginx配置之后，在浏览器中访问http://<ip或者domain>:port/status可以看到如下指标信息就是成功了。 4. 安装nginx-vts-exporter

[root@openresty-dev software]#  wget https://github.com/sysulq/nginx-vts-exporter/releases/download/v0.10.8/nginx-vtx-exporter_0.10.8_linux_amd64.tar.gz
[root@openresty-dev software]# mv nginx-vtx-exporter /usr/local/
[root@openresty-dev software]# chmod +x /usr/local/nginx_exporter/nginx-vtx-exporter
  1. 配置nginx-vts-exporter systemctl
    [root@openresty-dev software]# vim /usr/lib/systemd/system/nginx-exporter.service
[Unit] 
Description=nginx_vts_exporter
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/nginx_exporter/nginx-vtx-exporter  -nginx.scrape_uri http://192.168.3.232/status/format/json
Restart=on-failure

[Install]
WantedBy=multi-user.target

[root@openresty-dev software]# systemctl daemon-reload
[root@openresty-dev software]# systemctl start nginx-exporter
[root@openresty-dev software]# systemctl enable nginx-exporter
  2. 添加配置到prometheus.yml
      - job_name: 'nginx'
    static_configs:
    - targets: ['192.168.3.232:9913']
      labels:
         instance: nginx
    然后执行systemctl restart prometheus 重新启动prometheus。
  3. grafana导入nginx-exporter监控模板 模板连接：https://grafana.com/grafana/dashboards/2949

nginx_stub_status

This module is not built by default, it should be enabled with the --with-http_stub_status_module configuration parameter.

  1. 编译模块到nginx

    [root@openresty-dev software]#  ./configutre --prefix=/usr/local/openresty ...现有module..  --with-http_stub_status_module

  2. 修改nginx.conf配置文件

    ...
server {
....
location /nginx_status {
   stub_status;
}
}
...
[root@openresty-dev software]#  nginx -t && nginx -s reload

    浏览器中访问http://<ip或domain>:port/nginx_status

  3. 配置nginx_vts_exporter

    [Unit]
Description=nginx_vts_exporter
After=network.target

[Service]
Type=simple
#ExecStart=/usr/local/nginx_exporter/nginx-vtx-exporter  -nginx.scrape_uri http://192.168.3.232/status/format/jsonExecStart=/usr/local/nginx_exporter/nginx-vtx-exporter  -nginx.scrape_uri http://192.168.3.232/nbginx_status
Restart=on-failure

[Install]
WantedBy=multi-user.target

  4. 查看prometheus采集信息

  5. 添加配置到prometheus.yml

      - job_name: 'nginx'
    static_configs:
    - targets: ['192.168.3.232:9913']
      labels:
         instance: nginx

    然后执行systemctl restart prometheus 重新启动prometheus。

  6. 进入grafana导入监控模板，就可以了。