On 05/18/2013 07:24 PM, Gary Kotton wrote:
  Hi,
  I Have encountered a problem and maybe someone can help (RHEL-6.4 with
  upstream devstack). I deploy a VM and it works. If I restart my host,
  install devstack and then try and deploy a VM then it fails. If I try
  again it works. After the next reboot in order to get a VM up and
  running I need to deploy 3 VM's.
  The trace on nova compute is:
  2013-05-16 08:18:11.742 ERROR nova.openstack.common.rpc.amqp
  [req-cd75ed38-1d04-4611-9f34-cce01b388413 demo demo] Exception during
  message handling
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp Traceback
  (most recent call last):
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/openstack/common/rpc/amqp.py", line 433, in
  _process_data
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp     **args)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/openstack/common/rpc/dispatcher.py", line 148,
  in dispatch
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  return getattr(proxyobj, method)(ctxt, **kwargs)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/exception.py", line 98, in wrapped
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  temp_level, payload)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  self.gen.next()
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/exception.py", line 75, in wrapped
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  return f(self, context, *args, **kw)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 213, in
  decorated_function
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp     pass
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  self.gen.next()
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 199, in
  decorated_function
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  return function(self, context, *args, **kwargs)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 264, in
  decorated_function
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  function(self, context, *args, **kwargs)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 241, in
  decorated_function
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp     e,
  sys.exc_info())
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  self.gen.next()
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 228, in
  decorated_function
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  return function(self, context, *args, **kwargs)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 1320, in run_instance
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  do_run_instance()
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/openstack/common/lockutils.py", line 246, in inner
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  retval = f(*args, **kwargs)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 1319, in do_run_instance
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  admin_password, is_first_time, node, instance)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 877, in _run_instance
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  notify("error", msg=unicode(e))  # notify that build failed
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  self.gen.next()
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 853, in _run_instance
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  image_meta = self._prebuild_instance(context, instance)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 880, in
  _prebuild_instance
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  self._check_instance_exists(context, instance)
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp   File
  "/opt/stack/nova/nova/compute/manager.py", line 1083, in
  _check_instance_exists
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp     raise
  exception.InstanceExists(name=instance['name'])
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  InstanceExists: Instance instance-00000001 already exists.
  2013-05-16 08:18:11.742 TRACE nova.openstack.common.rpc.amqp
  Problem seems to be that instances hang around:
  [openstack@dhcp-4-126 devstack]$ virsh list --all
   Id    Name                           State
  ----------------------------------------------------
  [openstack@dhcp-4-126 devstack]$ sudo virsh list --all
   Id    Name                           State
  ----------------------------------------------------
   -     instance-00000001              shut off
   -     instance-00000002              shut off
   -     instance-00000003              shut off
   -     instance-00000004              shut off 
Issue appears to be that when one reboots a host running devstack (with
running VMS) that the domains are saved:
./etc/libvirt/qemu/instance-00000001.xml
./var/lib/libvirt/qemu/save/instance-00000001.save
./var/log/libvirt/qemu/instance-00000001.log
By deleting the files it enables one to run VM's after reboot.
Is there a libvirt configuration variable that will ensure that this is
not persistent? Or do we need to purge these each time devstack is
restarted?
  Problem is that I am unable to delete any of these.
  Any ideas?
  Thanks
  Gary