# Atalaya Uptime Monitor

[![CI](https://github.com/dcarrillo/atalaya/actions/workflows/ci.yml/badge.svg)](https://github.com/dcarrillo/atalaya/actions/workflows/ci.yml)
[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
[![Node.js](https://img.shields.io/badge/node-%3E%3D22-brightgreen.svg)](https://nodejs.org/)
[![TypeScript](https://img.shields.io/badge/TypeScript-6.0-blue.svg)](https://www.typescriptlang.org/)
[![Cloudflare Workers](https://img.shields.io/badge/Cloudflare-Workers-orange.svg)](https://workers.cloudflare.com/)
[![Astro](https://img.shields.io/badge/Astro-6.0-purple.svg)](https://astro.build/)

Atalaya (Spanish for watchtower) is an uptime & status page monitoring service running on Cloudflare Workers and Durable Objects.

It runs entirely on Cloudflare's free tier, so you get a self-hosted uptime monitor and status page without paying for servers. It's aimed at hobbyists who want control over their monitoring and don't mind living inside Cloudflare's ecosystem.

Live [example](https://uptime.ifconfig.es/).

:warning: 99% of the code has been generated by an AI agent under human supervision, bearing in mind that I haven't used TypeScript before. You have been warned!

```ASCII
                    🏴‍☠️
                    |
                _  _|_  _
               |;|_|;|_|;|
               \\.    .  /
                \\:  .  /
                 ||:   |
                 ||:.  |
                 ||:  .|
                 ||: , |
                 ||:   |
                 ||: . |
                _||_   |
        __ ----~    ~`---,
__ ,--~'                  ~~----____
```

## Features

- HTTP/HTTPs, TCP, and DNS monitoring.
- Regional monitoring from specific Cloudflare locations.
- Configurable retries with immediate retry on failure.
- Configurable failure thresholds before alerting.
- Custom alert templates for notifications (currently only webhooks are supported).
- Historical data stored in Cloudflare D1.
- Status page built with Astro 6 SSR, served by the same Worker via Static Assets.
  - 90-day uptime history with daily bars.
  - Response time charts (uPlot) with downtime bands.
  - Basic auth or public access modes.
  - Dark/light mode.
  - Custom banner image support with optional clickable link.

## Documentation

Read the [docs](https://atalaya-docs.dcarrillo.es/) for [setup](https://atalaya-docs.dcarrillo.es/getting-started/), [configuration](https://atalaya-docs.dcarrillo.es/configuration/), [alerts](https://atalaya-docs.dcarrillo.es/configuration/#alerts), and more.

## Development

```bash
# Run worker locally
wrangler dev --test-scheduled

# Run status page locally
pnpm dev:pages

# Trigger cron manually
curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"
```

### Testing

```bash
# First build the status page
pnpm build:pages

# Worker tests
pnpm test

# Status page unit tests
pnpm test:pages

# Type checking and linting
pnpm check              # worker (typecheck + lint + format)
pnpm check:pages        # pages (astro check + tsc + lint)
```

## TODO

- [ ] Add support for TLS checks (certificate validity, expiration). Apparently, the Workers API does not support certificate data access, even at the socket level. An external service may be required.
- [ ] Refine the status page to look... well... less AI-generated.
- [x] Per-monitor maintenance windows
- [ ] Initial support for incident management (manual status overrides, incident timeline).
- [x] Branded status page (simple custom banner).
- [ ] Add support for notifications other than webhooks.