ceilometer/doc/source/install/mod_wsgi.rst

Installing the API behind mod_wsgi

Ceilometer comes with a few example files for configuring the API service to run behind Apache with mod_wsgi.

app.wsgi

The file ceilometer/api/app.wsgi sets up the V2 API WSGI application. The file is installed with the rest of the ceilometer application code, and should not need to be modified.

etc/apache2/ceilometer

The etc/apache2/ceilometer file contains example settings that work with a copy of ceilometer installed via devstack.

../../../etc/apache2/ceilometer

1. On deb-based systems copy or symlink the file to /etc/apache2/sites-available. For rpm-based systems the file will go in /etc/httpd/conf.d.

2. Modify the WSGIDaemonProcess directive to set the user and group values to a appropriate user on your server. In many installations ceilometer will be correct.

3. Enable the ceilometer site. On deb-based systems:

   $ a2ensite ceilometer
   $ service apache2 reload

   On rpm-based systems:

   $ service httpd reload

Limitation

As Ceilometer is using Pecan and Pecan's DebugMiddleware doesn't support multiple processes, there is no way to set debug mode in the multiprocessing case. To allow multiple processes the DebugMiddleware may be turned off by setting pecan_debug to False in the api section of ceilometer.conf.

For other WSGI setup you can refer to the pecan deployment documentation. .. _`pecan deployment`: http://pecan.readthedocs.org/en/latest/deployment.html#deployment