AlertBot

Русский · English

A Telegram bot for monitoring a small server fleet on top of Prometheus and Alertmanager: it sends "problem / resolved" alerts and, on command, shows the state of servers, services and TLS certificates.

Status: personal project, in production · watches the author's five servers

Серверы

SPB
CPU 7% · RAM 41% · диск 38% · swap 0%
load 0.21 · аптайм 12д 4ч

DORM · ⚠ диск
CPU 18% · RAM 63% · диск 87% · swap 2% · temp 52°C
load 1.40 · аптайм 3д 9ч

_{Sample /servers reply (illustrative values; the bot speaks Russian).}

Stack: Python 3.10+ · aiogram 3 · aiohttp · SQLite · Prometheus HTTP API · Alertmanager API v2 · Docker

Features

• Alerts: polls Alertmanager every N seconds, deduplicates by fingerprint and immediately notifies subscribers about new and resolved alerts. No rules of its own — whatever Alertmanager has
• Watchdog: if Alertmanager itself stops responding, the bot reports it once and again when monitoring is back
• /servers — CPU, RAM, disk, swap, load, uptime and temperature per node, ⚠ above thresholds
• /services — which Prometheus targets are down
• /certs — days until TLS certificates expire, warning under 14 days
• /alerts — active alerts; /alerts on|off — subscription
• Access is limited to a list of Telegram IDs; everyone else is silently ignored

Quick start

git clone https://github.com/EDeev/alertbot.git && cd alertbot
cp .env.example .env      # bot token, IDs, Prometheus/Alertmanager URLs and tokens
docker compose up -d

Prebuilt image: docker pull ghcr.io/edeev/alertbot or docker pull dcr.deev.su/edeev/alertbot.

Installing without Docker

python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env
python bot.py

Configuration

Variable	Purpose
BOT_TOKEN	bot token from @BotFather
ALLOWED_IDS	comma-separated Telegram IDs allowed to use the bot
AM_ALERTS_URL, PROM_QUERY_URL	Alertmanager /api/v2/alerts and Prometheus /api/v1/query
AM_TOKEN, PROM_TOKEN	tokens sent in the Authorization: Bearer header
SERVERS_ORDER	comma-separated node names as in the metrics' server label
ALERT_POLL_SECONDS, ALERT_HTTP_TIMEOUT	poll interval and request timeout
ALERT_WATCHDOG_FAILURES	failed polls in a row before reporting monitoring as unreachable (default 4)
ALERTBOT_DB, ALERTBOT_LOG_FILE	SQLite file and log file (empty means stdout only)

Important

Do not expose Prometheus and Alertmanager to the internet without authentication. The bot expects a reverse proxy that checks the Authorization: Bearer … token; see the nginx example in docs/deploy.md (in Russian).

Deployment

The bot runs on a separate VPS as a systemd unit. Prometheus and Alertmanager live on another server behind nginx, which lets the bot in only with a token. GitHub Actions builds the Docker image on every v* tag and publishes it to GitHub Packages and to dcr.deev.su.

Development

pip install -r requirements-dev.txt
ruff check . && pytest

The tests need no network: Telegram and Prometheus are faked. They cover alert deduplication, resolved notifications, the watchdog and report texts.

License

MIT — see LICENSE.

Author

Egor Deev — GitHub · Telegram · egor@deev.space

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_{⭐ If you find this project useful, give it a star on GitHub!}

_{Made with ❤️ — deev.space}