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[Ketan Nilangekar <ketan_nilangekar@xxxxxxxxxxxx>]

Public bug reported:

I am seeing the following error during delete of an instance in
compute.log:

014-10-18 23:27:46.509 30501 ERROR nova.virt.libvirt.driver [-] [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] During wait destroy, instance disappeared.
2014-10-18 23:27:46.628 30501 ERROR nova.virt.libvirt.vif [req-6aa96e90-ea3b-4bf8-a546-c1dac69d05e9 5d559800e58849179f414112d7d2d026 d26c6927ca2249209c6736fe18e16b68] [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Failed while unplugging vif
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Traceback (most recent call last):
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/vif.py", line 602, in unplug_ovs_hybrid
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     utils.execute('brctl', 'delif', br_name, v1_name, run_as_root=True)
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/utils.py", line 178, in execute
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     return processutils.execute(*cmd, **kwargs)
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 180, in execute
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     cmd=sanitized_cmd)
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] ProcessExecutionError: Unexpected error while running command.
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Command: sudo nova-rootwrap /etc/nova/rootwrap.conf brctl delif qbr15cdd549-68 qvb15cdd549-68
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Exit code: 1
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Stdout: u''
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Stderr: u'interface qvb15cdd549-68 does not exist!\n'
2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]

However I see that the veth pair interfaces qv* and qbr* are getting
deleted as expected. I don't see any artifacts from the instance
deletion left over despite this message.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: libvirt

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https://bugs.launchpad.net/bugs/1385451

Title:
  Interface does not exist error during delete instance

Status in OpenStack Compute (Nova):
  New

Bug description:
  I am seeing the following error during delete of an instance in
  compute.log:

  014-10-18 23:27:46.509 30501 ERROR nova.virt.libvirt.driver [-] [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] During wait destroy, instance disappeared.
  2014-10-18 23:27:46.628 30501 ERROR nova.virt.libvirt.vif [req-6aa96e90-ea3b-4bf8-a546-c1dac69d05e9 5d559800e58849179f414112d7d2d026 d26c6927ca2249209c6736fe18e16b68] [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Failed while unplugging vif
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Traceback (most recent call last):
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/vif.py", line 602, in unplug_ovs_hybrid
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     utils.execute('brctl', 'delif', br_name, v1_name, run_as_root=True)
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/utils.py", line 178, in execute
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     return processutils.execute(*cmd, **kwargs)
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]   File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 180, in execute
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]     cmd=sanitized_cmd)
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] ProcessExecutionError: Unexpected error while running command.
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Command: sudo nova-rootwrap /etc/nova/rootwrap.conf brctl delif qbr15cdd549-68 qvb15cdd549-68
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Exit code: 1
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Stdout: u''
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c] Stderr: u'interface qvb15cdd549-68 does not exist!\n'
  2014-10-18 23:27:46.628 30501 TRACE nova.virt.libvirt.vif [instance: 91c742e3-8327-4b65-b96a-44dafccbbc1c]

  However I see that the veth pair interfaces qv* and qbr* are getting
  deleted as expected. I don't see any artifacts from the instance
  deletion left over despite this message.

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