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[Bug 1439855] Re: encrypted iSCSI volume fails to attach, name too long

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Fixing this on master (pike) now would mean fixing this in the os-brick
library since Nova no longer has this code in tree:

https://github.com/openstack/nova/commit/9c23cdc247770830fa288f429ca7231eb431a3b2

** Also affects: os-brick
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1439855

Title:
  encrypted iSCSI volume fails to attach, name too long

Status in OpenStack Compute (nova):
  Confirmed
Status in os-brick:
  New

Bug description:
  When running the following tempest tests an error occurs in n-cpu:

  tempest.scenario.test_encrypted_cinder_volumes.TestEncryptedCinderVolumes.test_encrypted_cinder_volumes_cryptsetup
  test_encrypted_cinder_volumes_luks

  This occurred when using devstack with nova at:

  HEAD is now at d0c2684 Merge "libvirt: Resize down an instance booted
  from a volume"

  Both stack traces below are from n-cpu logs:

  Stack Trace
  (tempest.scenario.test_encrypted_cinder_volumes.TestEncryptedCinderVolumes.test_encrypted_cinder_volumes_cryptsetup):

  2015-03-27 18:03:07.990 ERROR nova.compute.manager [req-cc941973-c038-4bac-a5ca-d516cd5dd33d TestEncryptedCinderVolumes-658052177 TestEncryptedCinderVolumes-1476988517] [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Failed to attach 2ab47be7-64ac-4d34-a38c-59c5e97e2ec2 at /dev/vdb
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Traceback (most recent call last):
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/compute/manager.py", line 4735, in _attach_volume
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     do_check_attach=False, do_driver_attach=True)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/virt/block_device.py", line 48, in wrapped
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     ret_val = method(obj, context, *args, **kwargs)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/virt/block_device.py", line 260, in attach
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     connector)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     six.reraise(self.type_, self.value, self.tb)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/virt/block_device.py", line 251, in attach
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     device_type=self['device_type'], encryption=encryption)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/virt/libvirt/driver.py", line 1065, in attach_volume
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     self._disconnect_volume(connection_info, disk_dev)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     six.reraise(self.type_, self.value, self.tb)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/virt/libvirt/driver.py", line 1052, in attach_volume
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     encryptor.attach_volume(context, **encryption)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/volume/encryptors/cryptsetup.py", line 86, in attach_volume
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     self._open_volume(passphrase, **kwargs)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/volume/encryptors/cryptsetup.py", line 71, in _open_volume
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     check_exit_code=True, run_as_root=True)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/opt/stack/new/nova/nova/utils.py", line 206, in execute
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     return processutils.execute(*cmd, **kwargs)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]   File "/usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py", line 233, in execute
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]     cmd=sanitized_cmd)
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] ProcessExecutionError: Unexpected error while running command.
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Command: sudo nova-rootwrap /etc/nova/rootwrap.conf cryptsetup create --key-file=- --cipher aes-xts-plain64 --key-size 512 ip-10.52.1.17:3260-iscsi-iqn.2003-10.com.lefthandnetworks:ci-vsa-12-725:159016:volume-2ab47be7-64ac-4d34-a38c-59c5e97e2ec2-lun-0 /dev/sdb
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Exit code: 1
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Stdout: u''
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46] Stderr: u'Name "ip-10.52.1.17:3260-iscsi-iqn.2003-10.com.lefthandnetworks:ci-vsa-12-725:159016:volume-2ab47be7-64ac-4d34-a38c-59c5e97e2ec2-lun-0" too long.\n'
  2015-03-27 18:03:07.990 29082 TRACE nova.compute.manager [instance: a2cccacf-2876-4e94-94e0-dbb3fbf51c46]

  
  Stack Trace (test_encrypted_cinder_volumes_luks):

  2015-03-27 18:06:48.928 ERROR nova.virt.libvirt.driver [req-7167f5a7-c620-474a-a6e0-1cc992192930 TestEncryptedCinderVolumes-658052177 TestEncryptedCinderVolumes-1476988517] [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Failed to attach volume at mountpoint: /dev/vdb
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Traceback (most recent call last):
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]   File "/opt/stack/new/nova/nova/virt/libvirt/driver.py", line 1052, in attach_volume
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]     encryptor.attach_volume(context, **encryption)
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]   File "/opt/stack/new/nova/nova/volume/encryptors/luks.py", line 114, in attach_volume
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]     self._open_volume(passphrase, **kwargs)
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]   File "/opt/stack/new/nova/nova/volume/encryptors/luks.py", line 89, in _open_volume
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]     run_as_root=True, check_exit_code=True)
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]   File "/opt/stack/new/nova/nova/utils.py", line 206, in execute
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]     return processutils.execute(*cmd, **kwargs)
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]   File "/usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py", line 233, in execute
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]     cmd=sanitized_cmd)
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] ProcessExecutionError: Unexpected error while running command.
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Command: sudo nova-rootwrap /etc/nova/rootwrap.conf cryptsetup luksOpen --key-file=- /dev/sdb ip-10.52.1.17:3260-iscsi-iqn.2003-10.com.lefthandnetworks:ci-vsa-12-725:159021:volume-e74c95eb-e69b-4cf3-ac37-74e4ef38f796-lun-0
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Exit code: 1
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Stdout: u''
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a] Stderr: u'Name "ip-10.52.1.17:3260-iscsi-iqn.2003-10.com.lefthandnetworks:ci-vsa-12-725:159021:volume-e74c95eb-e69b-4cf3-ac37-74e4ef38f796-lun-0" too long.\n'
  2015-03-27 18:06:48.928 29082 TRACE nova.virt.libvirt.driver [instance: ddeda0aa-1457-41d2-82e9-9a4ae888125a]

  
  To reproduce, run the tempest tests mentioned above on system that has an ip, iscsi properties and volume name which, when combined, results in a very long name used by cryptsetup.  The long name will cause the above error to occur.

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