How to properly serve Flask App on Ubuntu via Apache 2 and mod_wsgi? 404 Not Found Error


How to properly serve Flask App on Ubuntu via Apache 2 and mod_wsgi? 404 Not Found Error



My Flask App works great on local loopback with the Flask server, but now I am trying to get apache2 to serve the application on my private 192.168.0.0/24 network (my server's IP is 192.168.0.18).



EDIT3: I have followed most of Mr. Dumpleton's suggestions with the exception of moving the .wsgi out of document root (I plan to do that after all is running properly). I am able to get the hellow world script to run. Any machine on my private LAN can see it via my server's private IP. However when actually trying to get my site to run, a 404 is returned. There are no errors in /var/log/apache2/error.log. I suspect the issue is in my flaskapp.wsgi script. It seems a lot different than the one used for the simple "hello world" page.



Any suggestions? Thank you Stack Overflow


root@server:/var/www/flaskapp# cat /etc/hosts
127.0.0.1 www.flaskapp.com
127.0.1.1 server


root@server:/etc/apache2/sites-enabled# ls -l
total 0
lrwxrwxrwx 1 root root 32 Jun 29 23:27 flaskapp.conf -> ../sites-available/flaskapp.conf


root@server:/var/www/flaskapp# ls -l
total 8
drwxr-xr-x 8 root root 4096 Jun 30 18:14 flaskapp



-rw-r--r-- 1 root root 1397 Jun 30 19:02 flaskapp.wsgi


root@server:/var/www/flaskapp/flaskapp# ls -l
total 92
drwxr-xr-x 2 root root 4096 Jun 29 15:19 bin
drwxr-xr-x 2 bin root 4096 Jun 29 15:08 include
-rw-r--r-- 1 root root 64 Jun 30 00:19 __init__.py
drwxr-xr-x 3 bin root 4096 Jun 29 15:08 lib
drwxr-xr-x 2 bin root 4096 Jun 29 15:08 local
-rw-r--r-- 1 bin robobot 10113 Jun 30 19:12 main_state.py
-rw-r--r-- 1 bin robobot 10066 Jun 28 11:54 main_state.py.bak
-rw-r--r-- 1 bin root 61 Jun 29 15:08 pip-selfcheck.json
-rw-r--r-- 1 bin robobot 80 Jun 28 16:03 requirements.txt
-rw-r--r-- 1 bin robobot 7525 Jun 25 11:46 rss_gen27.py
-rw-r--r-- 1 bin robobot 7525 Jun 25 11:46 rss_gen27.py.bak
-rw-r--r-- 1 bin robobot 7520 Jun 25 11:42 rss_gen.py
-rw-r--r-- 1 bin robobot 7334 Jun 20 16:01 rss_gen.py.bak
drwxr-xr-x 2 bin robobot 4096 Jun 29 09:24 static
drwxr-xr-x 2 bin robobot 4096 Jun 28 11:53 templates


root@server:/var/www/flaskapp/flaskapp# cat /etc/apache2/sites-enabled/flaskapp.conf
<VirtualHost *:80>
ServerName www.flaskapp.com
ServerAlias flaskapp.com
DocumentRoot /var/www/flaskapp
<Directory /var/www/flaskapp>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
</Directory>
WSGIDaemonProcess flaskapp python-path=/var/www/flaskapp:/var/www/flaskapp/flaskapp/lib/python2.7/site-packages
WSGIProcessGroup flaskapp
WSGIScriptAlias / /var/www/flaskapp/flaskapp.wsgi
Alias /static /var/www/flaskapp/flaskapp/static
<Directory /var/www/flaskapp>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>


root@server:/var/www/flaskapp# cat flaskapp.wsgi
#!/usr/bin/python
activate_this = '/var/www/flaskapp/flaskapp/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))
import sys
import logging
import os
logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,"/var/www/flaskapp")
from flaskapp import app as application
application.secret_key = "random string of chars "


root@server:/var/www/flaskapp/flaskapp# cat __init__.py
from flask import Flask
app = Flask(__name__)
import main_state


main_state.py:

app = Flask(__name__)

@app.route('/', methods=['POST', 'GET'])
def home():
return render_template("index.html")

if __name__ == '__main__':
app.run(debug=True)





Comments are not for extended discussion; this conversation has been moved to chat.
– Yvette Colomb♦
2 days ago




1 Answer
1



The credit belongs to Mr. Dumpleton... here's what worked for me in order to get the flask app served on a private LAN:


root@server:/var/www/flaskapp# pwd
/var/www/flaskapp
root@server:/var/www/flaskapp# ls -l
total 96
drwxr-xr-x 2 root root 4096 Jun 29 15:19 bin
-rw-r--r-- 1 root root 750 Jul 1 00:14 flaskapp.wsgi
drwxr-xr-x 2 bin root 4096 Jun 29 15:08 include
-rw-r--r-- 1 root root 64 Jun 30 00:19 __init__.py
drwxr-xr-x 3 bin root 4096 Jun 29 15:08 lib
drwxr-xr-x 2 bin root 4096 Jun 29 15:08 local
-rw-r--r-- 1 root root 10113 Jun 30 23:34 main_state.py
-rw-r--r-- 1 bin robobot 10113 Jun 30 23:20 main_state.py.bak
-rw-r--r-- 1 bin root 61 Jun 29 15:08 pip-selfcheck.json
-rw-r--r-- 1 bin robobot 80 Jun 28 16:03 requirements.txt
-rw-r--r-- 1 bin robobot 7525 Jun 25 11:46 rss_gen27.py
-rw-r--r-- 1 bin robobot 7525 Jun 25 11:46 rss_gen27.py.bak
-rw-r--r-- 1 bin robobot 7520 Jun 25 11:42 rss_gen.py
-rw-r--r-- 1 bin robobot 7334 Jun 20 16:01 rss_gen.py.bak
drwxr-xr-x 2 bin robobot 4096 Jun 29 09:24 static
drwxr-xr-x 2 bin robobot 4096 Jun 28 11:53 templates

root@server:/var/www/flaskapp# cat __init__.py ; cat flaskapp.wsgi
from flask import Flask
app = Flask(__name__)
import main_state
#!/usr/bin/python
import sys
import logging
import os


this_dir = os.path.dirname(__file__)
sys.path.insert(0, this_dir)
activate_this = '/var/www/flaskapp/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))
this_dir = os.path.dirname(__file__)
logging.basicConfig(stream=sys.stderr)
from main_state import app as application
application.secret_key = "random string here"


Logs are located in /var/log/apache2/error.log

/etc/apache2/sites-enabled/flaskapp.conf:
<VirtualHost *:80>
ServerName www.flaskapp.com
ServerAlias flaskapp.com
DocumentRoot /var/www/flaskapp
<Directory /var/www/flaskapp>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
</Directory>
WSGIDaemonProcess flaskapp.com processes=2 threads=15 display-name=%{GROUP}
WSGIProcessGroup flaskapp.com
WSGIScriptAlias / /var/www/flaskapp/flaskapp.wsgi
Alias /static /var/www/flaskapp/static
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>


root@server:/var/www/flaskapp# cat /etc/hosts
127.0.0.1 www.flaskapp.com
127.0.1.1 server

and in the file with the routes... under the import statements there is
no more need for the app.secret_key = '....' or os.environ['...'] Only the
following lines were needed in my case:

app = Flask(__name__)
app.permanent_session_lifetime = datetime.timedelta(minutes=1)






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