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Do you have a __init__.py in your new directory?
http://www.chesnok.com/daily/2011/02/09/learning-python-the-hard-way-__init__-py-needed-for-packages-as-opposed-to-modules/

On Mon, Nov 10, 2014 at 3:43 AM, Mohammad Hosein Zarei
<hosein.zarei at gmail.com> wrote:
> Hi everyone
> I have a modified compute driver (my_driver.py and my_driver.pyc) and I
> copied files to /opt/stack/nova/nova/virt/libvirt/ directory.
> Also, nova.conf modified to use this driver
> (compute_driver=libvirt.my_driver.MyDriver).
> I can't start nova-compute with this modified driver and nova.conf. When
> nova-compute start , it shows this error:
>
>> 2014-11-10 12:03:25.300 DEBUG nova.servicegroup.api [-] ServiceGroup
>> driver defined as an instance of db from (pid=18709) __new__
>> /opt/stack/nova/nova/servicegroup/api.py:65
>> 2014-11-10 12:03:25.401 INFO nova.virt.driver [-] Loading compute driver
>> 'libvirt.my_driver.MyDriver'
>> 2014-11-10 12:03:25.406 INFO nova.openstack.common.periodic_task [-]
>> Skipping periodic task _periodic_update_dns because its interval is negative
>> 2014-11-10 12:03:25.424 ERROR nova.virt.driver [-] Unable to load the
>> virtualization driver
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver Traceback (most recent call
>> last):
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver   File
>> "/opt/stack/nova/nova/virt/driver.py", line 1385, in load_compute_driver
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver     virtapi)
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver   File
>> "/usr/local/lib/python2.7/dist-packages/oslo/utils/importutils.py", line 52,
>> in import_object_ns
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver     return
>> import_class(import_str)(*args, **kwargs)
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver   File
>> "/usr/local/lib/python2.7/dist-packages/oslo/utils/importutils.py", line 27,
>> in import_class
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver     __import__(mod_str)
>> 2014-11-10 12:03:25.424 TRACE nova.virt.driver ImportError: No module
>> named my_driver
>
>
> I really appreciate with any idea.
>
> Best Regard.
>
>
> --
> M.H.Zarei
>
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>



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