[rhos-list] nova-manage db sync error

[Pádraig Brady]

On 02/07/2013 06:41 PM, Shixiong Shang (shshang) wrote:
> Hi, experts:
>
> I am trying to issue the following command on nova node to sync with db, but it returns with error:
>
> [root at as-ctl1 bin]# sudo nova-manage db sync
> 2013-02-07 13:36:25 19362 DEBUG nova.utils [-] backend <module 'nova.db.sqlalchemy.migration' from '/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/migration.pyc'> __get_backend /usr/lib/python2.6/site-packages/nova/utils.py:502
> Command failed, please check log for more info
> 2013-02-07 13:36:25 19362 CRITICAL nova [-] No module named kombu
> 2013-02-07 13:36:25 19362 TRACE nova Traceback (most recent call last):
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/bin/nova-manage", line 1403, in <module>
> 2013-02-07 13:36:25 19362 TRACE nova     main()
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/bin/nova-manage", line 1391, in main
> 2013-02-07 13:36:25 19362 TRACE nova     rpc.cleanup()
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/__init__.py", line 203, in cleanup
> 2013-02-07 13:36:25 19362 TRACE nova     return _get_impl().cleanup()
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/__init__.py", line 269, in _get_impl
> 2013-02-07 13:36:25 19362 TRACE nova     _RPCIMPL = importutils.import_module(impl)
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/openstack/common/importutils.py", line 58, in import_module
> 2013-02-07 13:36:25 19362 TRACE nova     __import__(import_str)
> 2013-02-07 13:36:25 19362 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/impl_kombu.py", line 27, in <module>
> 2013-02-07 13:36:25 19362 TRACE nova     import kombu
> 2013-02-07 13:36:25 19362 TRACE nova ImportError: No module named kombu
> 2013-02-07 13:36:25 19362 TRACE nova
>
> Seems like it is missing python kombu module. I am using Preview plus RHEL 6.4 beta. Any suggestions?

This is fallout from our rearrangement of config variables.

Everything used to be in /etc/nova/nova.conf
and that's the default file read by nova-manage.

However we changed some distribution specific config vars,
that end users wouldn't need to touch out to /usr/share/nova/nova-dist.conf,
and that's where rpc_backend is set to "qpid".
Unfortunately nova-manage is unaware of that.

So to work around the issue I suggest adding this to /etc/nova/nova.conf
rpc_backend = nova.openstack.common.rpc.impl_qpid

The sample applies for /etc/cinder/cinder.conf

We'll fix this issue for the next version of these packages.

thanks,
Pádraig.