Run Flask in Docker with scale with HTTPS domain name using NGINX in Ubuntu 22.04

This repo is a template to run flask with docker-compose that is scalable and and uses a domain name.

Installation

Requirements

• docker
• docker-compose
• python
• flask
• nginx
• Ubuntu 22.04 Server
• domain

First step if to Clone this repo to your server

Point your domain to the server with A records

• Create 'A' record to ubuntu server's IP address with "@" as hostname
• Create 'A' record to ubuntu server's IP address with "www" as hostname

Update Ubuntu Server

Update Ubuntu

sudo apt-get update
sudo apt-get upgrade

Install Docker

How to install docker in Ubuntu 22.04

sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt update
apt-cache policy docker-ce
sudo apt install docker-ce

Check if docker is running

sudo systemctl status docker

Install docker-compose

Install Docker Compose on Ubuntu 22.04

sudo apt install docker-compose
sudo curl -L https://github.com/docker/compose/releases/download/v2.24.5/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose version

Check if docker-compose is running

docker compose version

Install Nginx

Install NGINX in Ubuntu 22.04

sudo apt update
sudo apt install nginx
sudo ufw app list
sudo ufw allow 'Nginx HTTP'
systemctl status nginx

Setup

Remove NGINX Defaults

sudo rm /etc/nginx/sites-enabled/default
sudo nano /etc/nginx/sites-enabled/<whatever you want, no spaces>

type the text below in the /etc/nginx/sites-enabled/<whatever you want, no spaces> then save it

server {
        listen 80;
        server_name www.insertdomainhere.com insertdomainhere.com;
        
        location / {
                proxy_pass http://localhost:8000;
                include /etc/nginx/proxy_params;
                proxy_redirect off;
        }
}

UFW Allow

sudo ufw allow http/tcp
sudo ufw allow ssh
sudo ufw allow https
sudo ufw enable
sudo ufw status

Get certificates for SSL

apt-get update
sudo apt-get install certbot
apt-get install python3-certbot-nginx
nginx -t && nginx -s reload
sudo certbot --nginx -d insertdomainhere.com -d www.insertdomainhere.com

SSL new folder

Create a folder inside nginx and name it ssl

Copy SSL cert pem file and private key

Get the contenst of fullchain.pem

sudo nano /etc/letsencrypt/live/insertdomainhere.com/fullchain.pem

copy and save it inside ./nginx/ssl/fullchain.pem

Get the contenst of privkey.pem

sudo nano /etc/letsencrypt/live/insertdomainhere.com/privkey.pem

copy and save it inside ./nginx/ssl/privkey.pem

Stop NGINX from localhost

sudo systemctl stop nginx

Usage

docker-compose up --build --scale web=3

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

Links

https://business-science.github.io/shiny-production-with-aws-book/https-nginx-docker-compose.html