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INSTALL.md

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Install instructions of Benchmarking Event API

The source code of this API is written using the Flask framework for Python 3. It depends on standard libreries, plus the ones declared in requirements.txt.

  • In order to install the dependencies you need pip3 and venv Python modules. - pip3 is available in many Linux distributions (Ubuntu package python3-pip, CentOS EPEL package python3-pip), and also as pip Python package.

    sudo apt-get install python3-pip python-dev build-essential
    	- `venv` for Python 3 can be installed with:

    sudo apt-get install python3-venv

  • The creation of a virtual environment and installation of the dependencies in that environment is done running:

python3 -m venv .pyenv
source .pyenv/bin/activate
pip install --upgrade pip wheel
pip install -r requirements.txt -c constraints.txt

API deployment

As the API can be used both for development and production, this code looks for the configuration file flask_app.py.json at the very same directory as it is installed. There are a couple of pre-configured files flask_app.py.json.dev and flask_app.py.json.prod which can be symlinked to flask_app.py.json.

Also, as the API queries collection TestActions, which has controlled access, a configuration file flask_app.py.json.auth is also needed. There is a template of this file at flask_app.py.json.auth.template.

API integration into Apache

This API can be integrated into an Apache instance. The instance must have the module WSGI installed (package libapache2-mod-wsgi-py3 in Ubuntu).

sudo apt-get install libapache2-mod-wsgi-py3
sudo a2enmod wsgi
sudo service apache2 restart
	<VirtualHost *:80>
		ServerAdmin webmaster@localhost
        DocumentRoot /home/<USERNAME>/public_html

		ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
		
		# Added to ensure Apache forwards authentication headers to Flask
		WSGIPassAuthorization On
		WSGIDaemonProcess flask_app python-path=/path/to/bench_event_api python-home=/path/to/bench_event_api/.pyenv
		WSGIProcessGroup flask_app
		WSGIApplicationGroup %{GLOBAL}
		
		Alias /rest/bench_event_api   /path/to/bench_event_api/flask_app.wsgi/
		<Location /rest/bench_event_api>
			Require all granted
			SetHandler wsgi-script
			Options +ExecCGI
		</Location>

     	ErrorLog ${APACHE_LOG_DIR}/error.log
     	LogLevel warn
     	CustomLog ${APACHE_LOG_DIR}/access.log combined
	</VirtualHost>