Django Server setup with Apache with mod

Description

Python application needs to be configured with apache webserver to publish the host.
The reason for mod_wsgi is the middleware which talks between python application and Apache

Overall Flow

installing the httpd service and modwsgi

sudo yum install httpd mod-wsgi

sudo systemctl start httpd
sudo systemctl status httpd
sudo systemctl enable httpd
httpd -v
sudo systemctl restart httpd

systemctl status httpd.service

Adding the user

[root@localhost ~]# adduser dj_adm
[root@localhost ~]# passwd dj_adm
Changing password for user dj_adm.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[root@localhost ~]#

Create the virtual environment using python3

[dj_adm@localhost ~]$ virtualenv -p python3 ~/virtualenvs/dj-env
created virtual environment CPython3.9.10.final.0-64 in 696ms
creator CPython3Posix(dest=/home/dj_adm/virtualenvs/dj-env, clear=False, no_vcs_ignore=False, global=False)
seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/dj_adm/.local/share/virtualenv)
added seed packages: pip==22.0.4, setuptools==61.0.0, wheel==0.37.1
activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator
[dj_adm@localhost ~]$

Activating Virtual environment and installing django

[dj_adm@localhost ~]$ source ~/virtualenvs/dj-env/bin/activate
(dj-env) [dj_adm@localhost ~]$ pip install django
Collecting django
Downloading Django-4.0.3-py3-none-any.whl (8.0 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 8.0/8.0 MB 7.6 MB/s eta 0:00:00
Collecting sqlparse>=0.2.2
Downloading sqlparse-0.4.2-py3-none-any.whl (42 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 42.3/42.3 KB 2.1 MB/s eta 0:00:00
Collecting asgiref<4,>=3.4.1
Downloading asgiref-3.5.0-py3-none-any.whl (22 kB)
Installing collected packages: sqlparse, asgiref, django
Successfully installed asgiref-3.5.0 django-4.0.3 sqlparse-0.4.2

cloning the git repo

(dj-env) [dj_adm@localhost ~]$ git clone https://github.com/velmuruganpon/dj-practice.git
Cloning into 'dj-practice'...
Username for 'https://github.com': vel----@gmail.com
Password for 'https://vel-----@gmail.com@github.com':
remote: Enumerating objects: 3, done.
remote: Counting objects: 100% (3/3), done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
Receiving objects: 100% (3/3), done.

(dj-env) [dj_adm@localhost ~]$ cd dj-practice/
(dj-env) [dj_adm@localhost dj-practice]$ git status
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
(dj-env) [dj_adm@localhost dj-practice]$ tree
.
└── README.md

0 directories, 1 file
(dj-env) [dj_adm@localhost dj-practice]$

Creating the first project called "mysite"

(dj-env) [dj_adm@localhost dj-practice]$ django-admin startproject mysite
(dj-env) [dj_adm@localhost dj-practice]$ tree
.
├── mysite
│   ├── manage.py
│   └── mysite
│       ├── asgi.py
│       ├── __init__.py
│       ├── settings.py
│       ├── urls.py
│       └── wsgi.py
└── README.md

2 directories, 7 files

changing the wsgi file

dj-env) [dj_adm@localhost dj-practice]$ cat mysite/mysite/wsgi.py
"""
WSGI config for mysite project.

It exposes the WSGI callable as a module-level variable named ``application``.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/howto/deployment/wsgi/
"""

python_home = '/home/dj_adm/virtualenvs/dj-env'

activate_this = python_home + '/bin/activate_this.py'

with open(activate_this) as f:
code = compile(f.read(), activate_this, 'exec')
exec(code, dict(__file__=activate_this))

import os
import sys

from django.core.wsgi import get_wsgi_application

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')

application = get_wsgi_application()

permission changes

chmod -R o+x /home/dj_adm/

selinux changes using root

chcon -R system_u:object_r:httpd_sys_script_exec_t:s0 /home/dj_adm/virtualenvs/dj-env
sudo chcon -R system_u:system_r:httpd_sys_script_exec_t:s0 /home/dj_adm/dj-practice/mysite

create the django.conf under /etc/httpd/conf.d/

[root@localhost opt]# cat /etc/httpd/conf.d/django.conf

<VirtualHost *:80>
   <Directory /home/dj_adm/dj-practice/mysite/mysite>
   <files wsgi.py>
       Require all granted
   </files>
   </Directory>

   WSGIDaemonProcess mysite
   WSGIProcessGroup mysite
   WSGIScriptAlias / /home/dj_adm/dj-practice/mysite/mysite/wsgi.py process-group=mysite
</VirtualHost>

restart the httpd service

[root@localhost opt]# sudo systemctl restart httpd

Permanent Selinux Changes using root

semanage fcontext -a -t httpd_sys_script_exec_t /home/dj_adm/virtualenvs/dj-env
semanage fcontext -a -t httpd_sys_script_exec_t /home/dj_adm/dj-practice/mysite

To verify the selinux changes

[root@localhost opt]# cat /etc/selinux/targeted/contexts/files/file_contexts.local
# This file is auto-generated by libsemanage
# Do not edit directly.

/home/dj_adm/virtualenvs/dj-env system_u:object_r:httpd_sys_script_exec_t:s0
/home/dj_adm/dj-practice/mysite system_u:object_r:httpd_sys_script_exec_t:s0

[root@localhost opt]#

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