UoL LAMP HowTo Install Python Flask Applications

Tags: HowTo Install Pain in the proverbial UoL LAMP Server

This page is for python 3, for python 2 see UoL LAMP HowTo Install Legacy Python Flask Applications

Create Environment

1. Add python 3 to your path by adding the following line to .profile file in your home directory:

PATH=$PATH:/opt/python3/bin/

You will need to log off and log back in to add the above to your current environment.

2. Change directory into /local/ and create a virtual environment:

cd /local/ && virtualenv --no-site-packages venv

3. Activate the virtual environment:

source /local/venv/bin/activate

4. Download your application from a repository such as ​GitHub. Go to the application directory and install Flask and the other requirements by running the command:

pip install -r requirements.txt

Apache Setup

1. Edit the Apache config:

vi /local/apache2/etc/httpd.conf

2. Amend the values below the comment # List of resources to look for when the client requests a directory to be:

# List of resources to look for when the client requests a directory
DirectoryIndex index.html

WSGIDaemonProcess application user=wwwrun threads=5 python-path=/local/venv/lib/python3.5/site-packages home={{{path to application folder}}}
WSGIScriptAlias / {{{path to application}}}

3. Edit the Apache modules conf:

vi /local/apache2/etc/loadmodule.conf

4. Add the following line to the end of the file:

LoadModule      wsgi_module             /opt/python3/lib/mod_wsgi.so

5. Restart Apache using the command:

sudo /etc/init.d/uol.apache2 restart

Error: Macro BackLinks(None) failed

'Environment' object has no attribute 'get_db_cnx'