Flask Web-App Setup Using WSGI and Apache or httpd on Debian and fedora based servers

[1] Installing Dependence

Debian

sudo apt-get install libapache2-mod-wsgi python-dev

pip3 install virtualenv

Fedora

sudo dnf install python-dev python3-pip mod_wsgi

pip3 install virtualenv

[2] Setting up the File System

mkdir /var/www/webapp
mkdir /var/www/webapp/logs
mkdir /var/www/webapp/static
touch app.py && touch webapp.wsgi
cd /var/www/webapp

virtualenv venv
source venv/bin/activate

pip install flask

app.py content

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return 'Hello, World!'

if __name__ == "__main__":
    app.run()

webapp.wsgi content

#!/usr/bin/python
import sys
import logging

activate_this = "/var/www/webapp/venv/bin/activate_this.py"
logging.basicConfig(stream=sys.stderr)
sys.path.insert(0, '/var/www/web-app/webapp')

with open(activate_this) as file_:
    exec(file_.read(), dict(__file__=activate_this))

from app import app as application

[3] Setting up httpd

Fedora

In /etc/httpd/conf.d/ create a new config file of any name flaskwebapp.conf

<VirtualHost *:80>

    ServerName <you_server_ip>

    ServerAdmin <email>

    WSGIDaemonProcess <webapp> user=apache group=apache threads=5
    WSGIScriptAlias / /var/www/webapp/webapp.wsgi

    <Directory /var/www/webapp/>
        Order allow,deny
        Allow from all
    </Directory>

    #FOR FLASK STATIC FOLDER

    Alias /static /var/www/web-app/webapp/static

    <Directory /var/www/webapp/static/>
        Order allow,deny
        Allow from all
    </Directory>

</VirtualHost>

Debian

for Debian base system running apache2, create .conf in /etc/apache2/sites-available/FlaskApp

.conf content

<VirtualHost *:80>

    ServerName <you_server_ip>

    ServerAdmin <email>

    WSGIDaemonProcess <webapp> user=apache group=apache threads=5
    WSGIScriptAlias / /var/www/webapp/webapp.wsgi

    <Directory /var/www/webapp/>
        Order allow,deny
        Allow from all
    </Directory>

    #FOR FLASK STATIC FOLDER

    Alias /static /var/www/web-app/webapp/static

    <Directory /var/www/webapp/static/>
        Order allow,deny
        Allow from all
    </Directory>

</VirtualHost>

after creating the .conf run this sudo a2ensite <naem_of_the_conf_without_.conf>

[4] changing context's for Fedora

For project folder

cd /var/www
semanage fcontext -a -t httpd_sys_content_t './webapp(/.*)?'
restorecon -vvRF ./webapp

For the WSGI script

cd /var/www
semanage fcontext -a -t httpd_sys_script_exec_t './webapp/webapp.wsgi'
restorecon -vvRF ./webapp/webapp.wsgi

To check context

ls -ldZ <file_or_dir>

[5] Refresh the server

sudo systemctl stop httpd
sudo systemctl start httpd
sudo systemctl enable httpd

To check the Status

sudo systemctl status httpd