Open Infrastructure

Django-hosting » History » Revision 28

Revision 27 (Nico Schottelius, 09/24/2020 12:46 PM) → Revision 28/30 (Nico Schottelius, 11/05/2020 05:30 PM)

h1. Django hosting by ungleich 

 {{toc}} 

 h2. Status 

 This document is **IN PRODUCTION** (since 2016-04-08).  
 Pricing can be found on the "ungleich products page":https://ungleich.ch/u/products/django-hosting/. 

 h2. How to use 

 # Configure your app 
 # Deploy your app 
 # Install project specific python requirements into the pyvenv 
 # Restart uwsgi to restart your app 
 # Go to http://your-hostname/ and enjoy! 


 h2. Configure your app 

 h3. WSGI 

 * Ensure that there is _projectname_/wsgi.py in your project root 

 h3. Database 

 Add the following to your settings.py: 

 <pre> 
 DATABASES = { 
     'default': { 
         'ENGINE': 'django.db.backends.postgresql_psycopg2', 
         'NAME': 'app', 
     } 
 } 
 </pre> 

 h3. Static and media files 

 Static files should be placed in */home/app/app/static* and media files in */home/app/app/media*. 

 Use the following code for configuration: 

 <pre> 
 PROJECT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), "..")) 
 STATIC_ROOT = os.path.join(BASE_DIR, "static/") 
 MEDIA_ROOT = os.path.join(PROJECT_DIR, 'media') 
 </pre> 

 Usually to generate/deploy the static files, you can use collectstatic: 

 <pre> 
 python manage.py collectstatic                                                               </pre> 


 h2. Deploy (first time) 

 You can login to your VM as user *app*: 

 <pre> 
 ssh app@MYHOSTNAME 
 git clone <path-to-your-project> ~/app 
 </pre> 


 * Deploy / update your app into the folder *~app/app* (that is the app folder in the home of the user app) 
 * We recommended to use git to deploy it 

 h2. Deploy (update) 

 <pre> 
 ssh app@MYHOSTNAME 
 cd ~/app 
 git pull 
 </pre> 


 h2. Install python requirements into the pyvenv 

 Pyvenv has been installed to *~app/pyvenv* for you. 
 Required packages for the hosting like PostgreSQL support and uwsgi support have already been placed. 

 You need to use pyvenv found in *~app/pyvenv*, as uwsgi loads this pyvenv before loading your app. 

 To install your requirements use: 

 <pre> 
 . ~/pyvenv/bin/activate 
 pip install ... 
 </pre> 

 h2. Restarting the app 

 * *sudo systemctl restart uwsgi* 


 h3. Viewing logfiles 

 * nginx access log: *tail -F /var/log/nginx/access.log* 
 * nginx error log: *tail -F /var/log/nginx/error.log* 
 * uwsgi log: *tail -F /var/log/uwsgi/app/app.log* 



 h2. Description of the stack 

 

 h3. Technologies 

 * Debian 
 * nginx 
 * PostgreSQL 
 * uwsgi 
 * python3 venv 

 pyvenv 

 h3. Configuration 

 * user "app" 
 ** in group "adm" (to view logfiles) 
 * PostgreSQL with 
 ** database "app" 
 ** Listens only on localhost / socket (no remote connections)