Node Watcher

Node Watcher is a simple monitoring system using Prometheus and Grafana.

The system is based on Docker containers managed by docker-composer.

Features

• Prometheus collects metrics from target node using Prometheus Node Exporter.

• A Grafana dashboard allows you to visualize the metrics.

• Metrics can be inspected in alternative ways:

  • using the Prometheus web interface;
  • direct access to Node Exporter endpoint (eg. using curl).

Requirements

• Docker (Tested on v. 18.09.5)
• Docker Compose (Tested on v. 1.24.0)

Docker containers

• Prometheus:

  • it will store the metrics in its local time-series database;
  • the web GUI will be accessible on localhost at address http://localhost:9090.

• Nodeexporter:

  • it is configured to access to the host for collecting system information (rootfs, proc, sys);
  • it is accessible on localhost at the address http://localhost:9100/metrics.

• Grafana:

  • it is autoconfigured to access Prometheus database;
  • it includes a simple dashboard to show CPU utilization, free memory and disk space;
  • it is accessible on localhost at the address http://locahost:3000

Quick start

Demo setup for monitoring the host itself.

1. Install docker and docker-compose (see Requirements).

2. From node-watcher project dir run containers:

   docker-compose up -d

3. Login to grafana dashboard (user: admin; password: admin): http://localhost:3000

4. Try the Prometheus web GUI: http://localhost:9090

To monitor a different server, install node-exporter on it and modify the "target" parameter in Prometheus configuration accordingly.

Author

Alberto Eusebi [email protected].