Internal 500 error with Django: trying to set up mod_wsgi - python

I created a website using django and am trying to set up mod_wsgi with my apache server.
When I go to my website I get this error:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root#localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
This is the error log file I get when I try setting up mod_wsgi:
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] mod_wsgi (pid=18513): Target WSGI script '/var/www/firstweb/firstweb/wsgi.py' cannot be loaded as Python module.
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] mod_wsgi (pid=18513): Exception occurred processing WSGI script '/var/www/firstweb/firstweb/wsgi.py'.
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] Traceback (most recent call last):
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] File "/var/www/firstweb/firstweb/wsgi.py", line 13, in <module>
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] from django.core.wsgi import get_wsgi_application
[Wed Jan 07 16:08:01 2015] [error] [client 108.200.246.4] ImportError: No module named django.core.wsgi
Below is my httpd.conf file:
WSGIScriptAlias /mahi/ /var/www/firstweb/firstweb/wsgi.py
WSGIPythonPath /var/www/firstweb/
<Directory "/var/www/firstweb/firstweb">
<Files wsgi.py>
Order allow,deny
Allow from all
</Files>
</Directory>
Please help me. I have no direction on where to go.

It seems that the python path is incomplete.
In ubuntu is something like this if you use the global Python installation.
WSGIPythonPath /var/www/firstweb/:/usr/local/lib/python3.4/dist-packages

You need to give
WSGIPythonPath /path/to/mysite.com
https://docs.djangoproject.com/en/1.7/howto/deployment/wsgi/modwsgi/#basic-configuration

Related

how to solve 500 internal server error mod_wsgi apache "importerror: No Module named 'django'

I have been trying to solve this error but I am not been able to solve, totally frustrated because I have tried every single answer on these related question , any help would be appreciated.
My configuration of VPS server
Ubuntu 18.04
django 2.2.5
apache 2.4.49
python 3.6(virtualenv)
libapache2-mod-wsgi-py3
My folder structure is:
/var/www/dataforze/prediction_project/venv (virtualenv folder)
bin
include
lib
/var/www/dataforze/prediction_project
|- manage.py
static
venv
prediction_project
|__init__.py
|settings.py
|urls.py
|wsgi.py
000-default.conf file code
<VirtualHost *:80>
<Directory /var/www/dataforze/prediction_project/prediction_project>
Require all granted
</Directory>
<Directory /var/www/dataforze/prediction_project/prediction_project>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
WSGIDaemonProcess prediction_project python-path=/var/www/dataforze/prediction_project python-home=/var/www/dataforze/prediction_project/venv
WSGIProcessGroup prediction_project
WSGIScriptAlias / /var/www/dataforze/prediction_project/prediction_project/wsgi.py
ErrorLog ${APACHE_LOG_DIR}/mysite_error.log
LogLevel warn
</VirtualHost>
my wsgi.py file code
import os
from django.core.wsgi import get_wsgi_application
sys.path.append('/var/www/dataforze/prediction_project/prediction_project')
# add the virtualenv site-packages path to the sys.path
sys.path.append('/var/www/dataforze/prediction_project/venv/lib/site-packages')
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'prediction_project.settings')
application = get_wsgi_application()
My server logs
[Wed Mar 18 17:29:01.003624 2020] [wsgi:error] [pid 82169:tid 140431942575872] mod_wsgi (pid=82169): Target WSGI script '/var/www/dataforze/prediction_project/prediction_project/wsgi.py' cannot be loaded as Python module.
[Wed Mar 18 17:29:01.003722 2020] [wsgi:error] [pid 82169:tid 140431942575872] mod_wsgi (pid=82169): Exception occurred processing WSGI script '/var/www/dataforze/prediction_project/prediction_project/wsgi.py'.
[Wed Mar 18 17:29:01.003823 2020] [wsgi:error] [pid 82169:tid 140431942575872] Traceback (most recent call last):
[Wed Mar 18 17:29:01.003844 2020] [wsgi:error] [pid 82169:tid 140431942575872] File "/var/www/dataforze/prediction_project/prediction_project/wsgi.py", line 12, in <module>
[Wed Mar 18 17:29:01.003849 2020] [wsgi:error] [pid 82169:tid 140431942575872] from django.core.wsgi import get_wsgi_application
[Wed Mar 18 17:29:01.003864 2020] [wsgi:error] [pid 82169:tid 140431942575872] ModuleNotFoundError: No module named 'django'

ImportError: No module named cv2 — WSGI + python + apache

I'm trying to run a python app on my apache Amazon EC2 server through WSGI, and I keep getting this error:
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] mod_wsgi (pid=28751): Target WSGI script '/var/www/html/lumos/wsgi.py' cannot be loaded as Python module.
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] mod_wsgi (pid=28751): Exception occurred processing WSGI script '/var/www/html/lumos/wsgi.py'.
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] Traceback (most recent call last):
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] File "/var/www/html/lumos/wsgi.py", line 11, in <module>
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] import app
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] File "/var/www/html/lumos/app.py", line 2, in <module>
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] import main
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] File "/var/www/html/lumos/main.py", line 1, in <module>
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] import mod_one
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] File "/var/www/html/lumos/mod_one.py", line 1, in <module>
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] import cv2
[Tue Aug 16 18:22:57 2016] [error] [client 72.219.147.5] ImportError: No module named cv2
This is where the cv2.so file is located (sudo find / -name "cv2.so"):
/var/www/html/lumos/opencv/build/lib/cv2.so
/usr/local/lib/python2.7/dist-packages/cv2.so
And I have set the WSGI Python Path to be where that file is located:
WSGIPythonPath /usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/
I know opencv is installed correctly because when I do the following, there's no error:
$ python
>>>import cv2 #no import error
>>>
When I installed mod_wsgi, this was used:
mod_wsgi-python26-3.2-6.11.amzn1.x86_64
Here is my wsgi.py file
import os, sys
sys.path.insert(0, "/var/www/html/lumos")
import bottle
import app
application = bottle.default_app() #using bottle.py web-framework
Here is my httpd.conf:
WSGISocketPrefix /var/run/wsgi
WSGIPythonPath /usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/
<VirtualHost *>
ServerName lumos.website.me
DocumentRoot /var/www/html/lumos
WSGIDaemonProcess lumos threads=5
WSGIScriptAlias / /var/www/html/lumos/app.wsgi
<Directory "/var/www/html/lumos">
WSGIProcessGroup lumos
WSGIApplicationGroup %{GLOBAL}
Order deny,allow
Allow from all
</Directory>
</VirtualHost>
When I run python -V, I get Python 2.7.10.
How can I make mod_wsgi work with opencv? Any help is appreciated.
Ok so it turns out, that according to the docs, you cannot use WSGIPythonPath when using daemon mode.
So the python path I had specified wasn't even doing anything. To fix, I used the 'python-path' option to the WSGIDaemonProcess directive instead.
In my httpd.conf file, I deleted this:
WSGIPythonPath /usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/
And changed this:
WSGIDaemonProcess lumos threads=5
To this:
WSGIDaemonProcess lumos threads=5 python-path=/usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/
So my final httpd.conf looks like this:
<VirtualHost *>
ServerName lumos.website.me
DocumentRoot /var/www/html/lumos
WSGIDaemonProcess lumos threads=5 python-path=/usr/local/lib/python2.7/site-packages/:/usr/local/lib/python2.7/dist-packages/
WSGIScriptAlias / /var/www/html/lumos/wsgi.py
<Directory "/var/www/html/lumos">
WSGIProcessGroup lumos
WSGIApplicationGroup %{GLOBAL}
Order deny,allow
Allow from all
</Directory>
</VirtualHost>
And now cv2 works.
Your setup is broken because mod_wsgi is compiled for Python 2.6 and not specifically for the Python 2.7 installation you want to use. You should not force the site-packages and dict-packages from your Python 2.7 installation into the module search path for what is a Python 2.6 environment. First up you are still running the wrong Python version and second, any extension modules in those directories will likely fail and possibly crash the processes.
You must uninstall the mod_wsgi you are using from system packages and install a version compiled for Python 2.7. Because you are using a non standard Python installation you likely will need to build mod_wsgi from source code.

Running Flask application from virtual environment

I have a simple flask app that i want to be accessible from internet.
OS is debian7, and unfortunately it can't be changed.
What I did:
- downloaded and installed Python3.4 into /usr/local/opt/python3.4.3
- installed wsgi lib for py3
- installed virtualenv and created new env in my flask project folder
- installed flask together with some other packages that I need within this env
- created VirtualHost as follows:
cat /etc/apache2/sites-available/Monitor
Listen 8080
<VirtualHost *:8080>
ServerName {ip address}
ServerAdmin {my email}
WSGIScriptAlias / /var/www/Monitor/monitor.wsgi
<Directory /var/www/Monitor/Monitor/>
Order allow,deny
Allow from all
</Directory>
Alias /static /var/www/Monitor/Monitor/static
<Directory /var/www/Monitor/Monitor/static/>
Order allow,deny
Allow from all
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
now when i try to access the app from the internet I see these errors in error.log
[Sat Nov 14 22:16:04 2015] [error] /usr/local/bin/python3
[Sat Nov 14 22:16:04 2015] [error] [client ip] mod_wsgi (pid=13450): Target WSGI script '/var/www/Monitor/monitor.wsgi' cannot be loaded as Python module.
[Sat Nov 14 22:16:04 2015] [error] [client ip] mod_wsgi (pid=13450): Exception occurred processing WSGI script '/var/www/Monitor/monitor.wsgi'.
[Sat Nov 14 22:16:04 2015] [error] [client ip] Traceback (most recent call last):
[Sat Nov 14 22:16:04 2015] [error] [client ip] File "/var/www/Monitor/monitor.wsgi", line 21, in <module>
[Sat Nov 14 22:16:04 2015] [error] [client ip] from Monitor import app as application
[Sat Nov 14 22:16:04 2015] [error] [client ip] File "/var/www/Monitor/Monitor/__init__.py", line 4, in <module>
[Sat Nov 14 22:16:04 2015] [error] [client ip] from flask import Flask, render_template, url_for
[Sat Nov 14 22:16:04 2015] [error] [client ip] File "/var/www/Monitor/Monitor/venv/lib/python3.4/site-packages/flask/__init__.py", line 17, in <module>
[Sat Nov 14 22:16:04 2015] [error] [client ip] from werkzeug.exceptions import abort
[Sat Nov 14 22:16:04 2015] [error] [client ip] File "/var/www/Monitor/Monitor/venv/lib/python3.4/site-packages/werkzeug/__init__.py", line 152, in <module>
[Sat Nov 14 22:16:04 2015] [error] [client ip] __import__('werkzeug.exceptions')
[Sat Nov 14 22:16:04 2015] [error] [client ip] File "/var/www/Monitor/Monitor/venv/lib/python3.4/site-packages/werkzeug/exceptions.py", line 113
[Sat Nov 14 22:16:04 2015] [error] [client ip] return u'<p>%s</p>' % escape(self.description)
[Sat Nov 14 22:16:04 2015] [error] [client ip] ^
[Sat Nov 14 22:16:04 2015] [error] [client ip] SyntaxError: invalid syntax
From what I could find in the internet, such errors appear when trying to start flask app with python version <= 3.3, which is not my case I think (how do i check?)
here is my wsgi that starts the app
#!/usr/bin/env python3
import os
import sys
import logging
logging.basicConfig(stream=sys.stderr)
PROJECT_DIR = '/var/www/Monitor/'
sys.path.insert(0, PROJECT_DIR)
def execfile(filename):
globals = dict(__file__ = filename)
exec(open(filename).read(), globals)
activate_this = '/var/www/Monitor/Monitor/venv/bin/activate_this.py'
execfile(activate_this)
from Monitor import app as application
Any help would be very much appreciated. Any additional information will be supplied if necessary.
Default Python3 on Debian 7 is 3.2.3, libapache2-mod-wsgi is in version 3.3.
You Apache run Your app with default Python because mod-wsgi has to be compiled against one and only one python version (in this case python 3.3).
mod-wsgi 3.3
If You want to run only one app (or many apps) with Python 3.4, try to recompile mod-wsgi with python 3.4
mod-wsgi 4.1.x or newer
This newer version of mod_wsgi provides a way of installing mod_wsgi against multiple Python versions and running up an Apache instance for each using a provided script. The script takes over all the setup of the Apache configuration so you do not need to worry about it.
https://pypi.python.org/pypi/mod_wsgi
old answer
To change Python version, set in Apache conf:
WSGIPythonHome /usr/local/opt/python3.4.3/
WSGIPythonPath /var/www/Monitor:/var/www/Monitor/Monitor/venv/lib/python3.4/site-packages:/usr/local/opt/python3.4.3/lib/site-packages
for details read https://code.google.com/p/modwsgi/wiki/ConfigurationDirectives#WSGIPythonHome

Django inside virtualenv keeps using wrong Python

I cannot, for the life of me, find a simple way to configure a (Linode Debian 6) server correctly with Django 1.8, Python 2.7.3, and virtualenv. Here's the steps I took:
mkvirtualenv --python=/usr/bin/python2.7 curator
This creates a VirtualEnv for me under /srv/ve/.virtualenvs/curator
Now I run:
pip install django
And Django 1.8 is successfully installed. Then, I switch to /srv/www/curator and run:
django-admin startproject cmscore
I then follow the Django Apache mod_wsgi instructions and end up with an Apache conf file under my sites-available directory looking like this:
<VirtualHost *:80>
ServerName cms.example.com
ServerAlias cms.example.com cms.example2.com
ServerAdmin errors#example.com
DocumentRoot /srv/www/curator/public_html
WSGIDaemonProcess cms.example.com python-path=/srv/ve/.virtualenvs/curator/bin/python:/srv/ve/.virtualenvs/curator/lib/python2.7/site-packages
WSGIProcessGroup cms.example.com
WSGIScriptAlias / /srv/www/curator/cmscore/cmscore/wsgi.py
<Directory /srv/www/curator/cmscore/cmscore>
<Files wsgi.py>
Order deny,allow
Allow from all
</Files>
</Directory>
Alias /robots.txt /srv/www/curator/public_html/robots.txt
Alias /favicon.ico /srv/www/curator/public_html/favicon.ico
Alias /css /srv/www/curator/public_html/css
Alias /js /srv/www/curator/public_html/js
Alias /img /srv/www/curator/public_html/img
Alias /static/admin /srv/www/curator/public_html/admin
Alias /static /srv/www/curator/public_html/static
Alias /media /srv/www/curator/public_html/media
ErrorLog /srv/www/curator/logs/error.log
CustomLog /srv/www/curator/logs/access.log combined
</VirtualHost>
The Django docs mention an WSGIPythonPath directive, but I get an error that WSGIPythonPath cannot occur within <VirtualHost> section when I use this.
With this configuration I get a 500 error (well obviously, there's a lot of settings I haven't added yet for example) but not one that I would expect. I get this (IPs blanked by me):
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] mod_wsgi (pid=21802): Target WSGI script '/srv/www/curator/cmscore/cmscore/wsgi.py' cannot be loaded as Python module.
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] mod_wsgi (pid=21802): Exception occurred processing WSGI script '/srv/www/curator/cmscore/cmscore/wsgi.py'.
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] Traceback (most recent call last):
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] File "/srv/www/curator/cmscore/cmscore/wsgi.py", line 15, in <module>
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] from django.core.wsgi import get_wsgi_application
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] File "/srv/ve/.virtualenvs/curator/lib/python2.7/site-packages/django/__init__.py", line 1, in <module>
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] from django.utils.version import get_version
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] File "/srv/ve/.virtualenvs/curator/lib/python2.7/site-packages/django/utils/version.py", line 7, in <module>
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] from django.utils.lru_cache import lru_cache
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] File "/srv/ve/.virtualenvs/curator/lib/python2.7/site-packages/django/utils/lru_cache.py", line 28
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] fasttypes = {int, str, frozenset, type(None)},
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] ^
[Thu May 21 14:55:16 2015] [error] [client xxx.xxx.xxx.xxx] SyntaxError: invalid syntax
So, this appears to be an error which occurs when Django 1.8 is being using by an earlier version of Python than 2.7. To debug, I threw this into the top of my wsgi.py file:
import sys
activate_this = '/srv/ve/.virtualenvs/curator/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))
sys.stderr.write(sys.version)
And in my Apache error log, I see:
2.6.6 (r266:84292, Dec 27 2010, 00:18:12)
I've tried every trick that I can think of (tricks that worked with existing virtualenvs of Django 1.6 and Python 2.7 on the exact same server!) including shebangs pointing to the correct Python install in my manage.py file, but I cannot find any way to get this to work.
I know I'm missing something really obvious here, but I am blind to it, can anyone help?

Import errors with WSGI, Flask, and Apache

Totally new to python-based web apps, so I'm somewhat lost. Here is my apache error:
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] mod_wsgi (pid=23704): Target WSGI script '/home/http/public/hello/hello.wsgi' cannot be loaded as Python module.
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] mod_wsgi (pid=23704): Exception occurred processing WSGI script '/home/http/public/hello/hello.wsgi'.
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] Traceback (most recent call last):
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] File "/home/http/public/hello/hello.wsgi", line 3, in <module>
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] from hello import app as application
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] File "/home/http/public/hello/hello.py", line 1, in <module>
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] from flask import Flask
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] ImportError: No module named 'flask'
[Wed May 08 22:41:47 2013] [error] [client 64.56.91.45] File does not exist: /home/http/public/favicon.ico
Apparently, it cannot find the flask module. I've looked this up, and it seems that most people get it to work by appending the project directory to the path, like so: (hello.wsgi)
import sys
sys.path.insert(0, "/home/http/public/hello")
from hello import app as application
And here is hello.py:
from flask import Flask
app = Flask(__name__)
#app.route('/')
def hello_world():
return 'Hello World!'
if __name__ == '__main__':
app.run(host='0.0.0.0')
Works great when ran as python hello.py, however, throws a 500 error when browsing to host/hello. Here's the Apache configuration:
WSGIDaemonProcess hello user=http group=http threads=5
WSGIScriptAlias /hello "/home/http/public/hello/hello.wsgi"
<Directory /home/http/public/hello/>
WSGIProcessGroup hello
WSGIApplicationGroup %{GLOBAL}
Order deny,allow
Allow from all
</Directory>
I'm somewhat lost.
The mod_wsgi module is built against a specific Python version and can only work with that version. You cannot force it to use a different version. Thus if you have multiple versions installed, you need to make sure that you are installing your packages and running your code in development against the same version.
You can determine which Python version/installation mod_wsgi is using by running the test:
http://code.google.com/p/modwsgi/wiki/CheckingYourInstallation#Python_Installation_In_Use

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