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Keystone has specifically avoided including multiple process patches because they want to encourage apache + mod_wsgi as the standard way of scaling the keystone api.

Vish

On May 13, 2014, at 9:34 PM, Aniruddha Singh Gautam <aniruddha.gautam at aricent.com> wrote:

> Hi,
>  
> Hope you are doing well…
>  
> I was working on trying to apply the patch for running multiple instance of Keystone. Somehow it does not work with following errors, I wish to still debug it further, but thought that I will check with you if you can provide some quick help. I was following http://blog.gridcentric.com/?Tag=Scalability. I did the changes on Ice House GA.
>  
> Error
> Traceback (most recent call last):
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/threadgroup.py", line 119, in wait
>     x.wait()
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/threadgroup.py", line 47, in wait
>     return self.thread.wait()
>   File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 168, in wait
>     return self._exit_event.wait()
>   File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line 116, in wait
>     return hubs.get_hub().switch()
>   File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 187, in switch
>     return self.greenlet.switch()
>   File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 194, in main
>     result = function(*args, **kwargs)
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 449, in run_service
>     service.start()
> AttributeError: 'tuple' object has no attribute 'start'
> (keystone): 2014-05-13 08:17:37,073 CRITICAL AttributeError: 'tuple' object has no attribute 'stop'
> Traceback (most recent call last):
>   File "/usr/bin/keystone-all", line 162, in <module>
>     serve(*servers)
>   File "/usr/bin/keystone-all", line 111, in serve
>     launcher.wait()
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 352, in wait
>     self._respawn_children()
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 342, in _respawn_children
>     self._start_child(wrap)
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 282, in _start_child
>     status, signo = self._child_wait_for_exit_or_signal(launcher)
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 240, in _child_wait_for_exit_or_signal
>     launcher.stop()
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 95, in stop
>     self.services.stop()
>   File "/usr/lib/python2.7/dist-packages/keystone/openstack/common/service.py", line 419, in stop
>     service.stop()
> AttributeError: 'tuple' object has no attribute 'stop'
>  
> In logs I can find the new child processes, somehow probably they are stopped and then it spawns another child processes.
>  
> I also noticed that support for running multiple neutron servers in ICE House GA. Any specific reason of not having same thing for Keystone (My knowledge of Openstack is limited, so please bear with my dumb questions)
>  
>  
> Best regards,
> Aniruddha
>  
> 
> 
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