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I've moved a cluster to a new network, and therefore want to delete the 
old private network, as it is in conflict with the new network.

nova-manage network delete --uuid=a37cbdd2-b016-4713-9ca4-962a1a1e5788

gives:
2012-09-04 19:40:04 DEBUG nova.utils 
[req-bb582d5d-4d87-407a-a702-21b298d82b50 None None] backend <module 
'nova.db.sqlalchemy.api' from 
'/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.pyc'> from 
(pid=2648) __get_backend 
/usr/lib/python2.7/dist-packages/nova/utils.py:658 
 
 

Command failed, please check log for more info 
 
 

2012-09-04 19:40:04 CRITICAL nova 
[req-bb582d5d-4d87-407a-a702-21b298d82b50 None None] Network 1 is still 
in use. 

2012-09-04 19:40:04 TRACE nova Traceback (most recent call last): 
 
 

2012-09-04 19:40:04 TRACE nova   File "/usr/bin/nova-manage", line 1746, 
in <module> 
 

2012-09-04 19:40:04 TRACE nova     main() 
 
 

2012-09-04 19:40:04 TRACE nova   File "/usr/bin/nova-manage", line 1733, 
in main 
 

2012-09-04 19:40:04 TRACE nova     fn(*fn_args, **fn_kwargs) 
 
 

2012-09-04 19:40:04 TRACE nova   File "/usr/bin/nova-manage", line 871, 
in delete 
 

2012-09-04 19:40:04 TRACE nova     fixed_range, uuid) 
 
 

2012-09-04 19:40:04 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 257, in 
wrapped 

2012-09-04 19:40:04 TRACE nova     return func(self, context, *args, 
**kwargs) 
 

2012-09-04 19:40:04 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 1425, 
in delete_network 

2012-09-04 19:40:04 TRACE nova     self.db.network_delete_safe(context, 
network.id) 
 

2012-09-04 19:40:04 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/db/api.py", line 740, in 
network_delete_safe 

2012-09-04 19:40:04 TRACE nova     return 
IMPL.network_delete_safe(context, network_id) 
 

2012-09-04 19:40:04 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 102, 
in wrapper 

2012-09-04 19:40:04 TRACE nova     return f(*args, **kwargs) 
 
 

2012-09-04 19:40:04 TRACE nova   File 
"/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 1907, 
in network_delete_safe 

2012-09-04 19:40:04 TRACE nova     raise 
exception.NetworkInUse(network_id=network_id) 
 

2012-09-04 19:40:04 TRACE nova NetworkInUse: Network 1 is still in use. 
 
 

2012-09-04 19:40:04 TRACE nova


It looks like the network is in use. I've done
nova-manage project scrub projectname

for all the projects. And I still get the "Network 1 is still in use." 
exception. I've read about removing it directly from the nova DB, but I 
don't know if that is correct or dangerous.

Can I get some feedback about how to delete this network.

I'm using Essex on top of Ubuntu 12.04

Thank you,

Simon

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