Sinyal.
A tool that monitors service health, reports outages, and publishes a public status page.
- Node.js
- Redis
- Docker
The problem
Users often notice an outage before the team does. Sinyal is a sample monitoring tool that checks services regularly and reports problems early.
My contribution
Check scheduler, alert rules, status page, and Docker-based deployment.
How I built it
- Interface
- Checks on configurable intervals that re-verify failures instead of alerting on a single bad response.
- API and server
- A service that manages email and webhook notifications through one rule structure.
- Data layer
- A statically generated status page that stays up even when the service is down and shows past incidents.
Outcome and takeaways
This sample highlighted the value of quiet alerts: fewer but trustworthy notifications are the ones teams actually act on.