Web Application Setup - Flask Setup

September 2, 2019

FLASK SITE SETUP

1. Create virutualenv for you application:

   ... cd /var/www/appname
   ... python3 -m virtualenv --python=python3 venv
   

2. Copy the basic application files to your new app directory:

   From your development machine:

   • scp manage.py wsgi.py adminusr@server:/var/www/appname

   • scp django.settings.ini adminusr@server:/var/www/appname/config

   • scp requirements.txt adminusr@server:/var/www/appname/packages

   • scp appsite-0.1.0.tar.gz adminusr@server:/var/www/appname/packages

   • scp app-plugin-0.1.0.tar.gz adminusr@server:/var/www/appname/packages

   Your directory structure should now look like:

   appname
   ├── config
   │   ├── django.settings.ini
   ├── data
   ├── logs
   ├── manage.py
   ├── packages
   │   ├── appsite-0.1.0.tar.gz
   │   ├── app-plugin-0.1.0.tar.gz
   │   ├── requirements.txt
   ├── static
   └── wsgi.py
   

   We’ll describe these files in more detail later.

   webapp python flask

Web Application Setup - HTTPS Set Up

September 2, 2019

set up Let’s Encrypt

1. Install certbot

   ... sudo apt-get update
   ... sudo apt-get install software-properties-common
   ... sudo add-apt-repository ppa:certbot/certbot
   ... sudo apt-get update
   ... sudo apt-get install python-certbot-nginx 
   

2. Run certbot

   ... sudo certbot --nginx
   

3. Automate renewal

   ... sudo certbot renew --dry-run
   

4. Reset firewall to only allow HTTPS

   ... sudo ufw
   

Prev Step: Nginx Setup

Web Application Setup - Install Software

September 2, 2019

Install Software

1. Install Python 3

   Good news, python 3 is already install on Ubuntu 17.10.

2. Install other top level software packages:

   You may need to run ubuntu upgrade before insalling:

   ... sudo apt-get update
   ... sudo apt-get upgrade
   

   Install the following packages:

   ... sudo apt-get install python3.7
   ... sudo apt-get install python3.7-venv
   ... sudo apt-get install python3-pip
   ... sudo apt-get install uwsgi-core
   ... sudo apt-get install uwsgi-plugin-python3
   ... sudo apt-get install nginx
   

   All other python packages will be installed in the applications virtual environment.

   webapp server python

Web Application Setup - Nginx Set Up

September 2, 2019

NGINX SET UP

1. Create your apps nginx configuration

   ... touch /var/www/appname/config/nginx-appname.cfg
   

2. The content of your nginx-appname.cfg files should look like this:

   upstream appname {
       server unix:/var/run/uwsgi/appname.socket;
   }
   
   server {
   
       listen 80;
       server_name SERVER_IP SERVER_DOMAIN;
   
       location = /favicon.ico { access_log off; log_not_found off; }
   
       location /static/ {
           root /var/www/appname/;
       }
   
       location / {
           uwsgi_pass      appname;
           include         /etc/nginx/uwsgi_params;
       }
   
   }
   

3. Link your nginx config file to nginx’ site config directory:

   ... cd /etc/nginx/sites-enabled
   ... ln -s /var/www/appname/config/appname-nginx.cfg appname
   

4. You can check your nginx config by running the following:

   webapp server nginx

Web Application Setup - Server Security

September 2, 2019

Optimizing Ubuntu Server

Services and programs you can likely kill:

This was taken from this site

1. BASICS

   Killing these didn’t impact the system at all when I tested:

   ... sudo apt remove snapd -y --purge
   ... sudo apt remove lxcfs -y --purge
   ... sudo apt remove policykit-1 -y --purge
   ... 
   ... sudo apt remove lvm2 -y --purge
   ... sudo apt remove at -y --purge
   ... sudo apt remove mdadm -y --purge
   ... sudo apt remove open-iscsi -y --purge
   ... sudo apt remove accountsservice -y --purge
   

2. EXTREME

   webapp server ubuntu digitalocean

Web Application Setup - uWSGI Set Up

September 2, 2019

Set Up uWSGI To Server Your Application

1. Create your uWSGI configuration file:

   ... touch /var/www/appname/config/uwsgi-appname.ini
   

2. Contents of your uwsgi-appname.ini should look like this:

   [uwsgi]
   
   plugins = python3,logfile
   
   chdir = /var/www/appname
   home = /var/www/appname/venv
   wsgi-file = /var/www/appname/wsgi.py
   
   master = True 
   cheap = True
   idle = 600
   die-on-idle = True
   manage-script-name = True
   

3. Link your config file so uwsgi can find it:

   ... cd /etc/uwsgi/apps-enabled
   ... ln -s /var/www/appname/config/uwsgi-appname.ini appname.ini
   

SYSTEMD UWSGI SET UP

1. Create systemd socket and server files for your uwsgi app:

   webapp server python uwsgi

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June 1, 2013

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