Azure Web App Timeout: Telegram Bot Deployment

Gunicorn is configured properly to handle incoming requests efficiently. You may need to tweak the number of worker processes and threads. By default, Gunicorn uses one worker process. Depending on the application’s requirements, you might need more.

• Implement a lightweight health check endpoint in the Flask app by this app responds quickly to Azure's warmup requests.

@app.route('/health')
def health_check():
    return 'OK', 200

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=8080)

Check my full code for the reference. bot.py:

import os
from flask import Flask, request
from telegram import Update, Bot
from telegram.ext import Dispatcher, CommandHandler, MessageHandler, Filters

app = Flask(__name__)

# Telegram Bot Token from environment variable
TOKEN = os.getenv('TELEGRAM_BOT_TOKEN')

# Create Bot instance
bot = Bot(token=TOKEN)
dispatcher = Dispatcher(bot, None, use_context=True)

# Command handler for /start
def start(update, context):
    update.message.reply_text('Hello! This is your bot.')

dispatcher.add_handler(CommandHandler('start', start))

# Health check endpoint
@app.route('/health', methods=['GET'])
def health():
    return 'OK', 200

# Webhook endpoint to receive updates from Telegram
@app.route('/webhook', methods=['POST'])
def webhook():
    update = Update.de_json(request.get_json(force=True), bot)
    dispatcher.process_update(update)
    return 'OK', 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8080)

Dockerfile:

# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set the working directory
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . /app

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Make port 8080 available to the world outside this container
EXPOSE 8080

# Run gunicorn.sh when the container launches
CMD ["./gunicorn.sh"]

Container Registry:

Console Output:

2024-05-27T00:00:00.000Z INFO  - Starting container for site
2024-05-27T00:00:00.000Z INFO  - docker run -d -p 8080:8080 --name telegram-bot -e WEBSITE_SITE_NAME=telegram-bot -e WEBSITE_AUTH_ENABLED=False -e WEBSITE_ROLE_INSTANCE_ID=0 -e WEBSITE_HOSTNAME=telegram-bot.azurewebsites.net -e WEBSITE_INSTANCE_ID=0000000000000000000000000000000000000000000000000000 -e HTTP_LOGGING_ENABLED=1 <your-registry-name>.azurecr.io/telegram-bot:latest
2024-05-27T00:00:00.000Z INFO  - Pulling image from Docker hub: testregmay28.azurecr.io/telegram-bot:latest
2024-05-27T00:00:00.000Z INFO  - Successfully pulled image ## testregmay28.azurecr.io/telegram-bot:latest
2024-05-27T00:00:00.000Z INFO  - Starting container
[2024-05-27 00:00:00 +0000] [1] [INFO] Starting gunicorn 20.x.x
[2024-05-27 00:00:00 +0000] [1] [INFO] Listening at: http://0.0.0.0:8080 (1)
[2024-05-27 00:00:00 +0000] [1] [INFO] Using worker: sync
[2024-05-27 00:00:00 +0000] [10] [INFO] Booting worker with pid: 10
[2024-05-27 00:00:00 +0000] [11] [INFO] Booting worker with pid: 11
[2024-05-27 00:00:00 +0000] [12] [INFO] Booting worker with pid: 12
[2024-05-27 00:00:00 +0000] [13] [INFO] Booting worker with pid: 13
[2024-05-27 00:00:01,000] INFO in bot: Flask app initialized.

indicating that the app wasn't responding to HTTP requests within the configured time limit.