f2685fc531
Now Pecan is sharing the same debug configration with Ceilometer, but DebugMiddleware of Pecan doesn't support multi processes. That means user can't enable the Ceilometer debug mode if he is using multi process mode for mod_wsgi config. Closes-Bug: 1352088 Change-Id: I6e83fbcbee23a519fe26c3036f42cc619848a989
70 lines
2.5 KiB
ReStructuredText
70 lines
2.5 KiB
ReStructuredText
..
|
|
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. Copy or symlink the file to ``/etc/apache2/sites-avilable``.
|
|
|
|
2. Modify the ``VirtualHost`` directive, setting a hostname or IP for
|
|
the service. The default settings assume that the ceilometer API is
|
|
the only service running on the local Apache instance, which
|
|
conflicts with Horizon's default configuration.
|
|
|
|
3. Modify the ``WSGIDaemonProcess`` directive to set the
|
|
``user`` and ``group`` values to a user available on your server.
|
|
|
|
4. Modify the ``APACHE_RUN_USER`` and ``APACHE_RUN_GROUP`` values to
|
|
the name of a user and group available on your server.
|
|
|
|
5. Enable the ceilometer site.
|
|
|
|
::
|
|
|
|
$ a2ensite ceilometer
|
|
$ service apache2 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. So user will run into HTTP 500 error if the mod_wsgi's multiprocessing
|
|
is enabled and the Ceilometer debug mode is enabled at the same time. There
|
|
is no good way to make both of them work, since Pecan is sharing the debug
|
|
mode with Ceilometer, see[1]. If you really need to enable both, a possible
|
|
workaround is hacking that line and hardcode the debug configration to False.
|
|
|
|
[1] https://github.com/openstack/ceilometer/blob/master/ceilometer/api/app.py
|