.. Copyright 2013 New Dream Network, LLC (DreamHost) Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. =================================== 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. .. literalinclude:: ../../../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 an 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