Dear everyone
I'm trying to deploy mod_wsgi to run my Django application, using a
MySQL backend, on SnowLeopard (10.6.6).
As I have read up on my posts from elsewhere, I know that MySQL and
Python/Django all have to be compiled into 32 bit mode to work in
SnowLeopard, so I have done that, and all is working fine in my
development site, using the standard python/django manage.py runserver
command.
So, now, I want to deploy this into the Apache 2 server running on my
mac, to test out some more dependencies, before moving the whole lot
over to our production Linux machine (where, happily, these problems I
am now having will go away -- but I need to test things on this
machine first). So first thing to do was recompile Apache 2 in 32
bit, and get that started as the default webserver in my local
machine, including the mod_wsgi.so also compiled to 32 bits.
So now the fun starts. When I have apache call the mod_wsgi handler
(which I am using to run a django user authentication etc module) I
get errors which I do NOT get when runing the same application in the
development server.
First error: from the apache error log --
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100] mod_wsgi
(pid=9128): Exception occurred processing WSGI script '/Peter stuff/
SDE/subscribers/django access control/anaaccess/apache/django.wsgi'.
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100] Traceback
(most recent call last):
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/core/handlers/wsgi.py", line 230, in __call__
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100]
self.load_middleware()
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/core/handlers/base.py", line 42, in load_middleware
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100] raise
exceptions.ImproperlyConfigured, 'Error importing middleware %s: "%s"'
% (mw_module, e)
[Fri Mar 18 08:14:05 2011] [error] [client 192.168.1.100]
ImproperlyConfigured: Error importing middleware request.middleware:
"No module named request.middleware"
OK, so I am using the django request middleware to log all user
accesses to a database so I can build nice traffic profiles etc. I
would like that, and don't understand why mod_wsgi can't find the
request stuff. The request package is right there in the same folder
along with everything else.
Second error. So I comment out the request stuff and try again. We
lose this error. But we get this one now:
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] mod_wsgi
(pid=9273): Exception occurred processing WSGI script '/Peter stuff/
SDE/subscribers/django access control/anaaccess/apache/django.wsgi'.
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] Traceback
(most recent call last):
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/core/handlers/wsgi.py", line 241, in __call__
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] response
= self.get_response(request)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/core/handlers/base.py", line 73, in get_response
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] response
= middleware_method(request)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/contrib/sessions/middleware.py", line 10, in
process_request
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] engine =
import_module(settings.SESSION_ENGINE)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/utils/importlib.py", line 35, in import_module
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100]
__import__(name)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/contrib/sessions/backends/db.py", line 2, in <module>
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] from
django.contrib.sessions.models import Session
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/contrib/sessions/models.py", line 4, in <module>
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] from
django.db import models
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/db/__init__.py", line 41, in <module>
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] backend
= load_backend(settings.DATABASE_ENGINE)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/db/__init__.py", line 17, in load_backend
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] return
import_module('.base', 'django.db.backends.%s' % backend_name)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/utils/importlib.py", line 35, in import_module
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100]
__import__(name)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] File "/
Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-
packages/django/db/backends/mysql/base.py", line 13, in <module>
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] raise
ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100]
ImproperlyConfigured: Error loading MySQLdb module: dlopen(/usr/local/
python-eggs/MySQL_python-1.2.3-py2.6-macosx-10.3-fat.egg-tmp/
_mysql.so, 2): Library not loaded: libmysqlclient.16.dylib
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] Referenced
from: /usr/local/python-eggs/MySQL_python-1.2.3-py2.6-macosx-10.3-
fat.egg-tmp/_mysql.so
[Fri Mar 18 08:58:29 2011] [error] [client 192.168.1.100] Reason:
image not found
Ok, the main one at the bottom seems to be that it cannot find the
libmysqlclient.16.dylib needed by the 32 bit mysql application. I had
this when compiling for the development version, and fixed it by
adding export DYLD_LIBRARY_PATH=/usr/local/mysql/lib/ to my bash
profile. But this seems to be ignored by mod_wsgi. Adding this to
the django.wsgi file
os.environ['DYLD_LIBRARY_PATH'] = '/usr/local/mysql/lib'
also does not work.
Help!
Peter Robinson
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