nginx-monitoring

Monitoring stack for nginx ssl web server

Table of contents

• Demo
• Tech stack
• Features
• To do
• Installation
• More

Demo

Tech stack

• Docker
• Nginx
• Grafana
• Prometheus
• Node-Exporter
• Cadvisor
• Nginx-Prom-Exporter

Features

• pre-configured, only cert/key and dhparam are needed to generate
• clean dashboard
• selfsigned ssl for web server
• useful metrics

To do

• more complex metrics

Installation

1. Git clone this repo

git clone https://github.com/k4mien/nginx-monitoring.git

2. Change directory to project

cd nginx-monitoring

3. Generate cert/key and dhparam

sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout ./selfsigned.key -out ./selfsigned.crt -subj "/CN=localhost"

sudo openssl dhparam -out ./dhparam.pem 2048

4. Start docker compose

docker compose up -d

More

By default I kept node-exporter in docker bridge network. It should be running on network_mode=host or host. To get network metrics from host you have to change following config:

node_exporter:
  image: prom/node-exporter
  container_name: node-exporter
  command:
    - "--path.rootfs=/host"
  pid: host
  network_mode: host
  volumes:
    - "/:/host:ro"

Now your node-exporter wont be in docker compose network but host. Then in prometheus.yml point to host ip rather than docker dns.

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: nginx-prom
    static_configs:
      - targets:
          - nginx-prom-export:9113

  - job_name: node-exporter
    static_configs:
      - targets:
          - <host-ip>:9100

  - job_name: cadvisor
    static_configs:
      - targets:
          - cadvisor:8080