hakanbayraktar / langchain-python

Deploy lang-chain and Flask Application Using Github Actions and AWS EC2 (Gunicorn & Nginx)

Steps:-

1. Create EC2 instance.
2. Add GitHub env variables.
3. Add GitHub actions, deployment script, and requirements.txt

Deployment Script for EC2 server [https://github.com/hakanbayraktar/langchain-course-python/blob/main/deploy.sh]

#!/bin/bash

echo "deleting old app" sudo rm -rf /var/www/

echo "creating app folder" sudo mkdir -p /var/www/app

echo "moving files to app folder" sudo mv * /var/www/app

Navigate to the app directory
cd /var/www/app/ sudo mv env .env

sudo apt-get update echo "installing python and pip" sudo apt-get install -y python3 python3-pip

Install application dependencies from requirements.txt
echo "Install application dependencies from requirements.txt" sudo pip install -r requirements.txt

Update and install Nginx if not already installed
if ! command -v nginx > /dev/null; then echo "Installing Nginx" sudo apt-get update sudo apt-get install -y nginx fi

Configure Nginx to act as a reverse proxy if not already configured
if [ ! -f /etc/nginx/sites-available/myapp ]; then sudo rm -f /etc/nginx/sites-enabled/default sudo bash -c 'cat > /etc/nginx/sites-available/myapp <<EOF server { listen 80; server_name _;

location / {
    include proxy_params;
    proxy_pass http://unix:/var/www/app/myapp.sock;
}

} EOF'

sudo ln -s /etc/nginx/sites-available/myapp /etc/nginx/sites-enabled
sudo systemctl restart nginx

else echo "Nginx reverse proxy configuration already exists." fi

Stop any existing Gunicorn process
sudo pkill gunicorn sudo rm -rf myapp.sock

Notes:

• Start Gunicorn with the Flask application
• Replace 'server:app' with 'yourfile:app' if your Flask instance is named differently.
• gunicorn --workers 3 --bind 0.0.0.0:8000 server:app & echo "starting gunicorn" sudo gunicorn --workers 3 --bind unix:myapp.sock server:app --user www-data --group www-data --daemon echo "started gunicorn 🚀"