ConnectionFailure when connecting to MongoHQ URI via Flask-PyMongo on httpd

Question

I have a Flask application with a Mongo backend that works fine in my local environment. I moved it to an RHEL instance hosted on AWS and got a Flask application running via httpd / mod_wsgi. However, the database connection on MongoHQ continues to fail.

Code for connection:

from flask import Flask
from flask.ext.pymongo import PyMongo

app = Flask(__name__)
app.config["MONGO_URI"] = 'mongodb://myusername:[e-mail]:myport/mydb'
mongo = PyMongo(app)

Request example:

@app.route('/books')
def books()
    all_books = mongo.db.listings.distinct("bookinfo")
    return all_books

Error message from Apache (edited for readability):

mod_wsgi (pid=5116, process='myProcess', application=''): Loading WSGI script '/route/to/myapp.wsgi'. 
mod_wsgi (pid=5116): Target WSGI script '/route/to/myapp.wsgi' cannot be loaded as Python module. 
mod_wsgi (pid=5116): Exception occurred processing WSGI script '/route/to/myapp.wsgi'. 
Traceback (most recent call last): 
File "/route/to/myapp.wsgi", line 10, in <module>
     from myApp import app as application   
File "/route/to/myapp.py", line 8, in <module>
     mongo = PyMongo(app)
File "/route/to/my/venv/lib/python2.6/site-packages/flask_pymongo/__init__.py", line 98, in __init__
    self.init_app(app, config_prefix)
File "/route/to/my/venv/python2.6/site-packages/flask_pymongo/__init__.py", line 230, in init_app
     cx = connection_cls(*args, **kwargs)
File "/route/to/my/venv/python2.6/site-packages/pymongo/mongo_client.py", line 352, in __init__
     raise ConnectionFailure(str(e))
ConnectionFailure: could not connect to myhost.mongohq.com:myport: [Errno 13] Permission denied

My thoughts / investigation:

• The application works fine when I delete the database connection: so is it not mod_wsgi, Apache or permission?
• I can connect to the mongo-uri through the Mongo shell and the Python shell, but not through the application: so this is not a firewall problem?
• MongoHQ ultraresponsive (, ) , Flask-PyMongo, , .

// .

Answer 1

SELinux . , SELinux, /etc/sysconfig/selinux. , :

import logging
file_handler = logging.FileHandler(filename='/var/www/myapp/flaskerror.log')
file_handler.setLevel(logging.WARNING)
app.logger.addHandler(file_handler)