prometheus+grafana 监控nginx

麦兜大表哥 / 2024-10-13 / 原文

一：安装插件

1.1 查看nginx已启用tub_status模块

nginx -V 2>&1 | grep -o with-http_stub_status_module 如果在终端输出with-http_stub_status_module，说明nginx已启用tub_status模块

在nginx 的配置文件添加如下配置

    location /nginx_status {
        stub_status on;
        access_log off;
        allow 127.0.0.1;
        deny all;
       }

1.2 下载插件nginx-prometheus-exporte 插件

nginx-prometheus-exporter用于把nginx的性能指标（stub_status）转化为prometheus可用的数据格式

在https://github.com/nginxinc/nginx-prometheus-exporter/releases下载nginx-prometheus-exporter_1.1.0_linux_amd64.tar.gz 安装包，并上传到nginx服务器/usr/local 目录下

1.3 安装nginx-prometheus-exporte

[root@rancher local]# mkdir nginx_exporter
[root@rancher local]# mv nginx-prometheus-exporter_1.1.0_linux_amd64.tar.gz ./nginx_exporter/
[root@rancher local]# cd nginx_exporter/
[root@rancher nginx_exporter]# tar -xvf nginx-prometheus-exporter_1.1.0_linux_amd64.tar.gz
[root@rancher local]# vim /usr/lib/systemd/system/nginx_exporter.service

[Unit]
Description=nginx_exporter
After=network.target

[Service]
Restart=on-failure
ExecStart=/usr/local/nginx_exporter/nginx-prometheus-exporter -nginx.scrape-uri http://10.12.121.198:7006/nginx_status

[Install]
WantedBy=multi-user.target

[root@rancher local]# systemctl restart nginx_exporter.service
[root@rancher local]# systemctl enable nginx_exporter.service

输入流量访问http://10.12.121.198:9113/metrics

1.4 prometheus配置

[root@rancher prometheus]# vim /data/prometheus/prometheus.yml

###nginx
  - job_name: 'nginx_status'
    metrics_path: '/metrics'
    scrape_interval: 5s
    static_configs:
      - targets: ["10.12.121.198:9113"]
    relabel_configs:
    - source_labels: [__address__]
      regex: "([^:]+):\\d+"
      target_label: instance