Hey,
Simple question so I made my own quick setup guide for a new python web app
served by ubuntu 14.04.3 vm, apache 2.4.7 and from source latest mod wsgi
(posted below). Im wondering how could I get the app and modwsgi and
apache to only run on the system python3.4.3 rather than the default 2.x?
It seems my venv isnt connecting properly to modwsgi or something and cant
serve the web app because I had to pip install flask into the standard
systems python (2.x) to get the configuration to work. So my concern is
if I start building/testing 5-10 web projects how is that going to work
unless my venv's python is connecting to apache and modwsgi, staying
isolated from the system pythons while properly connecting, hence the point
of virtual environments.? Im leaning towards python3 rather than legacy
python because Ive started with py3, but not sure if it even matters that
the app is running on py2 or any conflicts as a result of using 2.x and 3.x
on the same app.
************************************************************************************************************************************************************************************************************************
NEW PYTHON WEB APP SETUP INSTRUCTIONS - UBUNTU 14.04 VM / SERVER
0. PREREQUISITES: # on mac you may need
xcode-select --install
sudo apt-get update / upgrade
sudo apt-get install apache2
sudo apt-get install apache2-dev python-dev python3-dev
sudo apt-get install mysql-client mysql-server
1. INSTALL MOD_WSGI FROM SOURCE (run from a temp folder,
chown it if needed)
curl -sL https://github.com/GrahamDumpleton/mod_wsgi/archive/4.4.21.tar.gz
| tar xz
cd mod_wsgi-4.4.21
./configure #( --with-apxs=/usr/local/apache/bin/apxs \
# --with-python=/usr/local/bin/python)
make
sudo make install
make clean # To cleanup after installation
make distclean # If you need to build the module for a
different version of Apache
sudo nano /etc/apache2/mods-available/wsgi.load # create load
module file
# add the next string to the file:
LoadModule wsgi_module /usr/lib/apache2/modules/mod_wsgi.so #
save, exit, then
sudo a2enmod wsgi
sudo service apache2 restart
2. CREATE PROJECT STRUCTURE
cd /var/www
sudo mkdir site1 cd site1
sudo mkdir FlaskApp cd FlaskApp
sudo mkdir FlaskApp cd FlaskApp
sudo mkdir static templates
sudo nano __init__.py # copy text below into file,
save, close :
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello, flask app served to client browser properly!"
if __name__ == "__main__":
app.run(debug=True)
3. SET UP VIRTUAL ENV + INSTALL FLASK
sudo apt-get install python3-pip
sudo python3.4 -m venv --without-pip venv # pyvenv
workaround for ubuntu
source venv/bin/activate
sudo pip3 install flask
sudo python3 __init__.py # run test, check
localhost:5000
deactivate
# !! have to install flask into system python (python 2.x) or the app wont
be served to the browser
sudo pip install flask
4. CONFIGURE AND ENABLE A NEW VIRTUAL HOST (one for each
new web app)
sudo nano /etc/apache2/sites-available/site1.conf # copy
lines, save, exit :
<VirtualHost *:80>
ServerName 192.168.1.112
ServerAlias site1.me
ServerAdmin ad...@mywebsite.com
WSGIScriptAlias / /var/www/site1/FlaskApp/flaskapp.wsgi
<Directory /var/www/site1/FlaskApp/FlaskApp/>
Order allow,deny
Allow from all
</Directory>
Alias /static /var/www/site1/FlaskApp/FlaskApp/static
<Directory /var/www/site1/FlaskApp/FlaskApp/static/>
Order allow,deny
Allow from all
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
sudo a2ensite site1 # enable vhost
sudo service apache2 reload
5. CREATE .wsgi FILE TO LINK WSGI TO YOUR VHOST
sudo nano /var/www/site1/FlaskApp/flaskapp.wsgi
# copy lines, save, exit
# try? #!/usr/bin/python3.4
#!/usr/bin/python
import sys
import logging
logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,"/var/www/site1/FlaskApp/")
from FlaskApp import app as application
application.secret_key = 'a7j3sk29dk6gh4n69x0n70nn81mps'
6. RESTART APACHE, SET UP HOSTS FILE ALIAS (MAC), TEST IN BROWSER
sudo service apache2 restart # refresh configuration
sudo nano /etc/hosts # on MAC add line for your server IP and alias,
save, check in browser :
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
192.168.1.112 site1.me
SUCCESS !
**************************************************************************************************************************************************************************
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