yahoo-eng-team team mailing list archive

[Chen <1781391@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

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.

** Affects: nova
     Importance: Undecided
     Assignee: Chen (chenn2)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Chen (chenn2)

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1781391

Title:
  cellv2_delete_host when host not found by ComputeNodeList

Status in OpenStack Compute (nova):
  New

Bug description:
  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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1781391/+subscriptions