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[Bug 1453274] [NEW] libvirt: resume instance with utf-8 name results in UnicodeDecodeError

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Public bug reported:

This bug is very similar to
https://bugs.launchpad.net/nova/+bug/1388386.

Resuming a server that has a unicode name after suspending it results
in:

2015-05-08 15:22:30.148 4370 INFO nova.compute.manager [req-ac919325-aa2d-422c-b679-5f05ecca5d42 0688b01e6439ca32d698d20789d52169126fb41fb1a4ddafcebb97d854e836c9 6dfced8dd0df4d4d98e4a0db60526c8d - - -] [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Resuming
2015-05-08 15:22:31.651 4370 ERROR nova.compute.manager [req-ac919325-aa2d-422c-b679-5f05ecca5d42 0688b01e6439ca32d698d20789d52169126fb41fb1a4ddafcebb97d854e836c9 6dfced8dd0df4d4d98e4a0db60526c8d - - -] [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Setting instance vm_state to ERROR
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Traceback (most recent call last):
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 6427, in _error_out_instance_on_exception
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     yield
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 4371, in resume_instance
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     block_device_info)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2234, in resume
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     vifs_already_plugged=True)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/powervc_nova/virt/powerkvm/driver.py", line 2061, in _create_domain_and_network
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     disk_info=disk_info)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4391, in _create_domain_and_network
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     power_on=power_on)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4322, in _create_domain
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     LOG.error(err)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 85, in __exit__
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     six.reraise(self.type_, self.value, self.tb)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4305, in _create_domain
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     err = _LE('Error defining a domain with XML: %s') % xml
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547] UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 297: ordinal not in range(128)
2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]

The _create_domain() method has the following line:

err = _LE('Error defining a domain with XML: %s') % xml

which fails with the UnicodeDecodeError because the xml object has utf-8
encoding.  The fix is to wrap the xml object in
oslo.utils.encodeutils.safe_decode for the error message.

I'm seeing the issue on Kilo, but it is also likely an issue on Juno as
well.

** Affects: nova
     Importance: Undecided
     Assignee: Taylor Peoples (tpeoples)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Taylor Peoples (tpeoples)

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https://bugs.launchpad.net/bugs/1453274

Title:
  libvirt: resume instance with utf-8 name results in UnicodeDecodeError

Status in OpenStack Compute (Nova):
  New

Bug description:
  This bug is very similar to
  https://bugs.launchpad.net/nova/+bug/1388386.

  Resuming a server that has a unicode name after suspending it results
  in:

  2015-05-08 15:22:30.148 4370 INFO nova.compute.manager [req-ac919325-aa2d-422c-b679-5f05ecca5d42 0688b01e6439ca32d698d20789d52169126fb41fb1a4ddafcebb97d854e836c9 6dfced8dd0df4d4d98e4a0db60526c8d - - -] [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Resuming
  2015-05-08 15:22:31.651 4370 ERROR nova.compute.manager [req-ac919325-aa2d-422c-b679-5f05ecca5d42 0688b01e6439ca32d698d20789d52169126fb41fb1a4ddafcebb97d854e836c9 6dfced8dd0df4d4d98e4a0db60526c8d - - -] [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Setting instance vm_state to ERROR
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547] Traceback (most recent call last):
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 6427, in _error_out_instance_on_exception
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     yield
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 4371, in resume_instance
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     block_device_info)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2234, in resume
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     vifs_already_plugged=True)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/powervc_nova/virt/powerkvm/driver.py", line 2061, in _create_domain_and_network
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     disk_info=disk_info)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4391, in _create_domain_and_network
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     power_on=power_on)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4322, in _create_domain
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     LOG.error(err)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 85, in __exit__
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     six.reraise(self.type_, self.value, self.tb)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4305, in _create_domain
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]     err = _LE('Error defining a domain with XML: %s') % xml
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547] UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 297: ordinal not in range(128)
  2015-05-08 15:22:31.651 4370 TRACE nova.compute.manager [instance: 12371aa8-889d-4333-8fab-61a13f87a547]

  The _create_domain() method has the following line:

  err = _LE('Error defining a domain with XML: %s') % xml

  which fails with the UnicodeDecodeError because the xml object has
  utf-8 encoding.  The fix is to wrap the xml object in
  oslo.utils.encodeutils.safe_decode for the error message.

  I'm seeing the issue on Kilo, but it is also likely an issue on Juno
  as well.

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