Deploy django project to dotCloud

QuickNote: follow the Official guide may not be enough.

At first, I put ‘django’ in requirements.txt and put in the root dir of the DotCloud project, but it failed.

2011-07-22 XX:XX:XX [api] Waiting for the build. (It may take a few minutes)
2011-07-22 XX:XX:XX [www.0] The build started
2011-07-22 XX:XX:XX [www.0] Fetched code revision rsync-yyyyyyyyyy.y
2011-07-22 XX:XX:XX [www.0] Reloading nginx configuration: nginx.
2011-07-22 XX:XX:XX [www.0] uwsgi: stopped
2011-07-22 XX:XX:XX [www.0] uwsgi: started
2011-07-22 XX:XX:XX [www.0] The build finished successfully
2011-07-22 XX:XX:XX [api] Deploy finished

And when I trace the log, it shows….

==> /var/log/supervisor/uwsgi.log <==
added /home/dotcloud/current to pythonpath.
interpreter for app 0 initialized.
Traceback (most recent call last):
File "/home/dotcloud/current/wsgi.py", line 3, in <module>
import django.core.handlers.wsgi
ImportError: No module named django.core.handlers.wsgi

Then I figured out the reason, I didn’t put the requirements.txt in the right directory. So I move requirements.txt to the same directory where wsgi.py in.

2011-07-22 XX:XX:XX [api] Waiting for the build. (It may take a few minutes)
2011-07-22 XX:XX:XX [www.0] The build started
2011-07-22 XX:XX:XX [www.0] Fetched code revision rsync-yyyyyyyyyy.y
2011-07-22 XX:XX:XX [www.0] Downloading/unpacking django (from -r requirements.txt (line 1))
2011-07-22 XX:XX:XX [www.0] Creating supposed download cache at /home/dotcloud/.pip-cache
2011-07-22 XX:XX:XX [www.0]   Storing download in cache at /home/dotcloud/.pip-cache/http%3A%2F%2Fpypi.python.org%2Fpackages%2Fsource%2FD%2FDjango%2FDjango-1.3.tar.gz
2011-07-22 XX:XX:XX [www.0]   Running setup.py egg_info for package django
2011-07-22 XX:XX:XX [www.0] Installing collected packages: django
2011-07-22 XX:XX:XX [www.0]   Running setup.py install for django
2011-07-22 XX:XX:XX [www.0]     changing mode of build/scripts-2.6/django-admin.py from 644 to 755
2011-07-22 XX:XX:XX [www.0]     changing mode of /home/dotcloud/env/bin/django-admin.py to 755
2011-07-22 XX:XX:XX [www.0] Successfully installed django
2011-07-22 XX:XX:XX [www.0] Cleaning up...
2011-07-22 XX:XX:XX [www.0] Reloading nginx configuration: nginx.
2011-07-22 XX:XX:XX [www.0] uwsgi: stopped
2011-07-22 XX:XX:XX [www.0] uwsgi: started
2011-07-22 XX:XX:XX [www.0] The build finished successfully
2011-07-22 XX:XX:XX [api] Deploy finished

But wait, I still got the error message:

added /home/dotcloud/current to pythonpath.
interpreter for app 0 initialized.
application 0 () ready
setting default application to 0
Traceback (most recent call last):
  File "/home/dotcloud/current/wsgi.py", line 8, in application
    return djangoapplication(environ, start_response)
NameError: global name 'djangoapplication' is not defined

To investigate, let’s what happened to the wsgi.py

import os
os.environ['DJANGO_SETTINGS_MODULE'] = '.'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
def application(environ, start_response):
    if 'SCRIPT_NAME' in environ:
        del environ['SCRIPT_NAME']
    return djangoapplication(environ, start_response)

So I should follow the guide, let’s commented out line 4~8. But I got another error:

raceback (most recent call last):
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 250, in __call__
    self.load_middleware()
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/core/handlers/base.py", line 39, in load_middleware
    for middleware_path in settings.MIDDLEWARE_CLASSES:
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/utils/functional.py", line 276, in __getattr__
    self._setup()
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/conf/__init__.py", line 42, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/conf/__init__.py", line 87, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/home/dotcloud/env/lib/python2.6/site-packages/django/utils/importlib.py", line 28, in import_module
    raise TypeError("relative imports require the 'package' argument")
TypeError: relative imports require the 'package' argument

The similar problem reported on dotcloud forum can be found here. However, I found the official document is not suitable for me, at least I didn’t want to add any extra files to my original repository. So the final version of dotcloud.yml, wsgi.py is here:
dotcloud.yml:

www:
  type: python
# approot: djangoproject # comment the approot, otherwise you need to put wsgi.py/requirements.txt in this directory

wsgi.py: (Note the line 2, 3 is for django path search, line 4 is to specify which settings.py to be loaded)

import os
import sys
sys.path = sys.path + ["/home/dotcloud/current/djangoproject/"]
os.environ['DJANGO_SETTINGS_MODULE'] = 'djangoproject.settings'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()

Finally, my django project rocks on DotCloud, and the best part is I don’t have to add any extra files to my project directory.

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