grizzly scheduler can not start with import error

[Gloria Gu]

Grizzly nova installtion finished without complain.

apt-get install -y nova-api nova-cert novnc nova-consoleauth nova-scheduler nova-novncproxy

When try to start nova-scheduler service:
service nova-scheduler restart

the log contains the following error:

2013-01-22 11:58:13 19961 TRACE nova
2013-01-22 13:36:24 20088 CRITICAL nova [-] No module named simple
2013-01-22 13:36:24 20088 TRACE nova Traceback (most recent call last):
2013-01-22 13:36:24 20088 TRACE nova File "/usr/bin/nova-scheduler", line 53, in <module>
2013-01-22 13:36:24 20088 TRACE nova topic=CONF.scheduler_topic)
2013-01-22 13:36:24 20088 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 496, in create
2013-01-22 13:36:24 20088 TRACE nova periodic_fuzzy_delay=periodic_fuzzy_delay)
2013-01-22 13:36:24 20088 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 381, in __init__
2013-01-22 13:36:24 20088 TRACE nova self.manager = manager_class(host=self.host, *args, **kwargs)
2013-01-22 13:36:24 20088 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 62, in __init__
2013-01-22 13:36:24 20088 TRACE nova self.driver = importutils.import_object(scheduler_driver)
2013-01-22 13:36:24 20088 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 40, in import_object
2013-01-22 13:36:24 20088 TRACE nova return import_class(import_str)(*args, **kwargs)
2013-01-22 13:36:24 20088 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 30, in import_class
2013-01-22 13:36:24 20088 TRACE nova __import__(mod_str)
2013-01-22 13:36:24 20088 TRACE nova ImportError: No module named simple
2013-01-22 13:36:24 20088 TRACE nova

service doesn't get started.

[Davanum Srinivas (DIMS) (dims-v)]

Can you please look in nova.conf to see if you have a definition for scheduler_driver? if you do, try commenting it out and restart the process?

thanks,
dims

[Thierry Carrez (ttx)]

Could also be a packaging issue, adding Ubuntu to make sure

[Yolanda Robla (yolanda.robla)]

Thanks for reporting this
Can you provide the Ubuntu version where that error is happening?
Also, can you use the command:
apt-get install -f

And check the results of this?

[Chuck Short (zulcss)]

Please attach your configuration file.

[Gloria Gu (gloria-gu)]

ubuntu version :

Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-3.2.0-23-generic linux-headers-3.2.0-23

in my nova.conf

it used to be this, I commented it out
#scheduler_driver=nova.scheduler.simple.SimpleScheduler

and added the following:

compute_scheduler_driver = nova.scheduler.filter_scheduler.FilterScheduler

it seems to work.

Again...there is NO doc for grizzly installation, I sort of follow the following link....got lots of road blocks.

https://github.com/mseknibilel/OpenStack-Folsom-Install-guide

[Chuck Short (zulcss)]

Again please attach your configuration file.

[Gloria Gu (gloria-gu)]

Hi,

I am not sure about the state of the system at this point since I move on to do a different project. Will ask one of my co-workers to follow up on this if the system info is still available. Gloria

[Chuck Short (zulcss)]

Please re-open this bug when you have the information.

[Thiago Martins (martinx)]

Same problem here... I'm installing Grizzly from Ubuntu PPA (grizzly-trunk-testing) and my nova-scheduler.log shows up:

2013-03-15 16:39:11.205 858 CRITICAL nova [-] No module named simple
2013-03-15 16:39:11.205 858 TRACE nova Traceback (most recent call last):
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/bin/nova-scheduler", line 54, in <module>
2013-03-15 16:39:11.205 858 TRACE nova topic=CONF.scheduler_topic)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 534, in create
2013-03-15 16:39:11.205 858 TRACE nova db_allowed=db_allowed)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 413, in __init__
2013-03-15 16:39:11.205 858 TRACE nova self.manager = manager_class(host=self.host, *args, **kwargs)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 65, in __init__
2013-03-15 16:39:11.205 858 TRACE nova self.driver = importutils.import_object(scheduler_driver)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 40, in import_object
2013-03-15 16:39:11.205 858 TRACE nova return import_class(import_str)(*args, **kwargs)
2013-03-15 16:39:11.205 858 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/openstack/common/importutils.py", line 30, in import_class
2013-03-15 16:39:11.205 858 TRACE nova __import__(mod_str)
2013-03-15 16:39:11.205 858 TRACE nova ImportError: No module named simple
2013-03-15 16:39:11.205 858 TRACE nova

[Thiago Martins (martinx)]

Comment #5 solves the issue...