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telegram-logger: Hack Your Logs

Welcome to telegram-logger, where we turn your logs into Telegram messages. Because logs should be as mobile as you are.

Table of Contents

What's This?

telegram-logger is a server that receives log entries via HTTP POST requests and sends them to a Telegram chat instance. It's like having a secret agent for your logs.

Configuration

Your config file is the key to the kingdom. Here's what you can tweak:

listenAddress: 0.0.0.0:8080 logger: level: debug format: json telegramBot: token: YOUR_SECRET_TOKEN_HERE superuserChatID: 38081130 storage: type: badgerDB badgerDB: dsn: /path/to/db/dir

Prefer environment variables? We've got you covered:

export LISTENADDRESS=0.0.0.0:8080 export LOGGER_LEVEL=debug export LOGGER_FORMAT=json export TELEGRAMBOT_TOKEN=YOUR_SECRET_TOKEN_HERE export TELEGRAMBOT_SUPERUSERCHATID=38081130 export STORAGE_TYPE=badgerDB export STORAGE_BADGERDB_DSN=/path/to/db/dir

HTTP API

Send a POST request with your log entry. Don't forget your secret handshake (X-ID header).

{ "caller": "myService", "time": "2022-03-11T12:34:56.789Z", "level": "error", "message": "Something went wrong!", "error": "Error: XYZ", "requestID": "abc123", "traceID": "def456", "spanID": "ghi789", "data": { "someKey": "someValue", "anotherKey": 123 } }

Telegram Bot

Our bot's got a few commands that you can throw at it:

  • /start: Get your unique ID
  • /stop: Go dark
  • /getAllUsers: For the admins
  • /addUser: Recruit new agents (admin only) - a user can also be a channel

Pro Tip: Adding a channel? Here's how:

  1. Send a message to your target channel
  2. Grab the channel ID from the message URL (e.g., https://t.me/c/2340157712/5)
  3. Add the prefix: -100
  4. Use the command: /addUser -1002340157712
  5. Grab the ID that the bot sends to the channel(and maybe delete that message) and use it as your X-ID header when doing your HTTP request.

Running the Service

Docker

docker run -it \ --env CONFIGFILE=/app/config.yml \ --env LOGGER_LEVEL=debug \ --env LOGGER_FORMAT=json \ --env TELEGRAMBOT_TOKEN=TOKEN \ --env TELEGRAMBOT_SUPERUSERCHATID=CHATID \ --env STORAGE_TYPE=badgerDB \ --env STORAGE_BADGERDB_DSN=/app/db \ --mount type=bind,src=$(pwd)/config.yml,dst=/app/config.yml,readonly \ --mount type=bind,src=$(pwd)/db,dst=/app/db \ -p 0.0.0.0:8080:80 \ psyb0t/telegram-logger

Docker Compose

version: "3.8" services: server: image: psyb0t/telegram-logger ports: - 8080:80 volumes: - ./config.yml:/app/config.yml:ro - ./db:/app/db environment: - CONFIGFILE=/app/config.yml - LOGGER_LEVEL=debug - LOGGER_FORMAT=json - TELEGRAMBOT_TOKEN=TOKEN - TELEGRAMBOT_SUPERUSERCHATID=CHATID - STORAGE_TYPE=badgerDB - STORAGE_BADGERDB_DSN=/app/db

Fire it up:

docker compose -f docker-compose.yml up

Binary

First, get the latest binary:

#!/usr/bin/env bash owner=psyb0t repo=telegram-logger asset_name=telegram-logger-linux-amd64 echo "Looking up the latest release of $asset_name for github.com/$owner/$repo..." releases=$(curl -s https://api.github.com/repos/$owner/$repo/releases) latest_release=$(echo "$releases" | jq -r '.[0]') asset_url=$(echo "$latest_release" | jq -r ".assets[] | select(.name == \"$asset_name\") | .browser_download_url") echo "Downloading $asset_url..." curl -s -L -o "$asset_name" "$asset_url" chmod +x "$asset_name"

Then run it:

export LISTENADDRESS=0.0.0.0:8080 export LOGGER_LEVEL=debug export LOGGER_FORMAT=json export TELEGRAMBOT_TOKEN=YOUR_SECRET_TOKEN_HERE export TELEGRAMBOT_SUPERUSERCHATID=YOUR_CHAT_ID_HERE export STORAGE_TYPE=badgerDB export STORAGE_BADGERDB_DSN=./db ./telegram-logger-linux-amd64

Interacting with the Service

Time to put it to the test:

curl -X POST -H "Content-Type: application/json" -H "X-ID: YOUR_SECRET_ID" -d '{  "caller": "myService",  "time": "2022-03-11T12:34:56.789Z",  "level": "warning",  "message": "Something went wrong!",  "error": "Error: XYZ",  "requestID": "abc123",  "traceID": "def456",  "spanID": "ghi789",  "data": {  "someKey": "someValue",  "anotherKey": 123  } }' http://localhost:8080/

Available Clients

More clients in the pipeline. Stay tuned.

TODO

  • More config validation
  • Add healthcheck
  • Add trace id to logs
  • Create external wrapper package based on telegramBotMessageHandler
  • Build embeddable helper packages to interact with a deployed service
  • Fix linting
  • SQLITE support

Now go forth and hack those logs! 🖥️

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HTTP service that receives log entries as JSON and sends them to users via a Telegram bot.

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