Open Stack

Thanks Matt for the pointers. I was already aware of this cache mechanism.

However my approach is different: I do not want to cache clients, but
simply

update the context with the token that was obtained. And if the same
context

is reused, no new token will be generated.

Ala




2013/7/3 Matt Riedemann <mriedem at us.ibm.com>

> For some history, there was an attempt at consolidating some of this here:
>
> *
> https://github.com/openstack/nova/commit/dd9c27f999221001bae9faa03571645824d2a681
> *<https://github.com/openstack/nova/commit/dd9c27f999221001bae9faa03571645824d2a681>
>
> But that caused some issues and was reverted here:
>
>
> https://github.com/openstack/nova/commit/ee5d9ae8d376e41e852b06488e922400cf69b4ac
>
>
>
> Thanks,
>
> *MATT RIEDEMANN*
> Advisory Software Engineer
> Cloud Solutions and OpenStack Development
> ------------------------------
>  *Phone:* 1-507-253-7622 | *Mobile:* 1-507-990-1889*
> E-mail:* *mriedem at us.ibm.com* <mriedem at us.ibm.com>
> [image: IBM]
>
> 3605 Hwy 52 N
> Rochester, MN 55901-1407
> United States
>
>
>
>
>
> From:        Ala Rezmerita <ala.rezmerita at cloudwatt.com>
> To:        OpenStack Development Mailing List <
> openstack-dev at lists.openstack.org>,
> Cc:        gongysh at unitedstack.com, hrushikesh.gangur at hp.com
> Date:        07/03/2013 11:26 AM
> Subject:        [openstack-dev] [Nova] too many tokens
> ------------------------------
>
>
>
> Hi everyone,
>
> I have a question regarding too many token generation in nova when using
> quantumclient (also related to bug reports *
> https://bugs.launchpad.net/nova/+bug/1192383*<https://bugs.launchpad.net/nova/+bug/1192383>+
> *https://bugs.launchpad.net/nova-project/+bug/1191159*<https://bugs.launchpad.net/nova-project/+bug/1191159>)
>
>
> For instance during the periodic task  *heal_instance_info_cache*  (every
> 60s) nova calls quantum API method  get_instance_nw_info that calls
> _build_network_info_model (backtrace at the end of the mail).
>
> During the execution of this method,  4 quantum clients intances are
> created (all of them use the same context object) and for each of them a
> new token is generated.
>
> Is it possible to change this behavior by updating the context.auth_token
> property the first time a quantumclient for a given context is created (so
> that the same token will be reused among the 4 client instances) ?  Is
> there some security issue that can appear?
>
> Thanks
>
> Ala Rezmerita
> Cloudwatt
>
> The backtrace :
>
>   /usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py(194)main()
> -> result = function(*args, **kwargs)
>   /opt/stack/nova/nova/openstack/common/loopingcall.py(125)_inner()
> -> idle = self.f(*self.args, ***self.kw* <http://self.kw/>
> )
>
>   /opt/stack/nova/nova/service.py(283)periodic_tasks()
> -> return self.manager.periodic_tasks(ctxt, raise_on_error=raise_on_error)
>   /opt/stack/nova/nova/manager.py(100)periodic_tasks()
> -> return self.run_periodic_tasks(context, raise_on_error=raise_on_error)
>
> /opt/stack/nova/nova/openstack/common/periodic_task.py(179)run_periodic_tasks()
> -> task(self, context)
>   /opt/stack/nova/nova/compute/manager.py(3654)_heal_instance_info_cache()
> -> self._get_instance_nw_info(context, instance)
>   /opt/stack/nova/nova/compute/manager.py(767)_get_instance_nw_info()
> -> instance, conductor_api=self.conductor_api)
>   /opt/stack/nova/nova/network/quantumv2/api.py(367)get_instance_nw_info()
> -> result = self._get_instance_nw_info(context, instance, networks)
>   /opt/stack/nova/nova/network/quantumv2/api.py(375)_get_instance_nw_info()
> -> nw_info = self._build_network_info_model(context, instance, networks)
>
> /opt/stack/nova/nova/network/quantumv2/api.py(840)_build_network_info_model()
> -> client = quantumv2.get_client(context, admin=True)
> > /opt/stack/nova/nova/network/quantumv2/__init__.py(67)get_client()
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
>


-- 
Ala Rezmerita
Software Engineer
CloudWatt
Tel : (+33) 06 77 43 23 91
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20130704/c0840661/attachment.html>