ceilometer api under mod_wsgi should allow multiple process

[Chris Dent]

Because of the configuration of the pecan app that hosts the ceilometer-api it is not possible to host the api under mod_wsgi when mod_wsgi is configured for multiple processes. See: http://docs.openstack.org/developer/ceilometer/install/mod_wsgi.html#limitation

This limitation can be overcome by using a separate (that is _explicit_) configuration option to control pecan's debug mode.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/121823

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/121823
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=8691ba8086348795fc70b8afce0f5ef6f94182b9
Submitter: Jenkins
Branch: master

commit 8691ba8086348795fc70b8afce0f5ef6f94182b9
Author: Chris Dent <email address hidden>
Date: Tue Sep 16 13:13:00 2014 +0100

    Allow pecan debug middleware to be turned off

    The Pecan DebugMiddleware is turned on or off based on the
    ceilometer.conf-wide debug setting. This is not useful for situations
    where running ceilometer-api under mod_wsgi with multiple processes
    is desired.

    This change adds a pecan_debug setting to the api section of config,
    defaulting to the DEFAULT debug value. mod_wsgi install docs updated
    accordingly.

    Configuration docs have not yet been udpated. They will be pending a
    fix to bug 1370030

    Closes-Bug: #1370009

    Change-Id: Ib4a472e3c8d1f34f64a5f3ab993c1211dee8af9a