Problematic Situation:
1 check the hosts visible to nova compute
nova hypervisor-list
id hypervisor hostname state status
xx compute2 up enbled
2 check the hosts visible to cellv2
nova-manage cell_v2 list_hosts
cell name cell uuid hostname
cell1 xxxx compute1
cell1 xxxx compute2
Here compute1 that actually does not exist (like renamed) still remains in cell_mappings
3 now try to delete host compute1
nova-manage cell_v2 delete_host --cell_uuid xxxx --host compute1
then the following error is shown:
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 1620, in main
ret = fn(*fn_args, **fn_kwargs)
File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 1558, in delete_host
nodes = objects.ComputeNodeList.get_all_by_host(cctxt, host)
File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper
result = fn(cls, context, *args, **kwargs)
File "/usr/lib/python2.7/site-packages/nova/objects/compute_node.py", line 437, in get_all_by_host
use_slave=use_slave)
File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 225, in wrapper
return f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/nova/objects/compute_node.py", line 432, in _db_compute_node_get_all_by_host
return db.compute_node_get_all_by_host(context, host)
File "/usr/lib/python2.7/site-packages/nova/db/api.py", line 297, in compute_node_get_all_by_host
return IMPL.compute_node_get_all_by_host(context, host)
File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 270, in wrapped
return f(context, *args, **kwargs)
File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 672, in compute_node_get_all_by_host
raise exception.ComputeHostNotFound(host=host)
ComputeHostNotFound: Compute host compute1 could not be found.
Not quite sure the exact way to reproduce it, but I think it would be nicer to allow the delete_host
operation for situations like this.
Fix proposed to branch: master
Review: https:/