Open Stack

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Hi guys,

another day, another problem :).

  * Icehouse
  * Apache2.4
  * Ubuntu 14.04

I'm scaling our Neutron API endpoints to different servers to reach more
throughput. In this case i decided to use apache2 with WSGI module to
run the server in multi threaded mode to use optimal all CPU cores and
handle more parallel requests.

I create a vHost and a wsgi startup script file

script:

|from neutron.openstack.common import log as logging
from neutron.common import config

logging.setup('neutron')
config.parse(['--config-file', '/etc/neutron/neutron.conf',
'--config-file', '/etc/neutron/plugins/ml2/ml2_conf.ini'])
application = config.load_paste_app("neutron")|

vhost:

|Listen *:9696
<VirtualHost *:9696>
    WSGIScriptAlias / /var/www/cgi-bin/neutron
    WSGIDaemonProcess neutron-public user=neutron group=neutron
processes=3 threads=10
    WSGIProcessGroup neutron-public
    WSGIApplicationGroup %{GLOBAL}
    WSGIPassAuthorization On

    LogLevel info
    ErrorLog /var/log/apache2/neutron-error.log
    CustomLog /var/log/apache2/neutron-access.log combined
</VirtualHost>|

So the server is running well, all requests are working well but i see
on the messaging bus (rabbitmq) unack messages in two queues as far as
the apache2 is running. The unack messages on both queues
(n-lbaas-plugin & q-metering-plugin) is increasing over time. As soon as
i switch to the build-IN webserver of Neutron all messages on both
queues will ack and deliver.

Is there any trick or is that a problem with multi thread ?

Cheers and thanks
Heiko

- -- 
anynines.com
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