Open Infrastructure

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

h3. Configuration

* user "app"

** in group "adm" (to view logfiles)

* PostgreSQL with

** database "app"

** Listens only on localhost / socket (no remote connections)