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).

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

Demo setup for monitoring the host itself.

Install docker and docker-compose (see Requirements).
From node-watcher project dir run containers:
```
docker-compose up -d
```
Login to grafana dashboard (user: admin; password: admin): http://localhost:3000
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.