Aodh comes with a WSGI application file named aodh/api/app.wsgi for configuring the API service to run behind Apache with mod_wsgi. This file is installed with the rest of the Aodh application code, and should not need to be modified.
You can then configure Apache with something like this:
Listen 8042
<VirtualHost *:8042>
WSGIDaemonProcess aodh-api processes=2 threads=10 user=SOMEUSER display-name=%{GROUP}
WSGIProcessGroup aodh-api
WSGIScriptAlias / /usr/lib/python2.7/dist-packages/aodh/api/app
WSGIApplicationGroup %{GLOBAL}
<IfVersion >= 2.4>
ErrorLogFormat "%{cu}t %M"
</IfVersion>
ErrorLog /var/log/httpd/aodh_error.log
CustomLog /var/log/httpd/aodh_access.log combined
</VirtualHost>
WSGISocketPrefix /var/run/httpd
Modify the WSGIDaemonProcess directive to set the user and group values to an appropriate user on your server. In many installations aodh will be correct.