Open Stack

Potential fix here: https://review.openstack.org/#/c/12384/

Vish

On Sep 4, 2012, at 1:18 PM, David Kang <dkang at isi.edu> wrote:

> 
> 
> mysql DB shows that 'root_device_name' of an LXC instance is set as "/dev/a".
> I believe it is a bug.
> Let me file it as a bug.
> 
> David
> 
> ----- Original Message -----
>> This looks like a recent bug. Lxc may not be setting root_device_path
>> in the block device mapping table. It is now using root_device_path to
>> set the path for the volumes. We may need to supply a fallback if it
>> isn't set.
>> 
>> Vish
>> 
>> On Sep 4, 2012, at 11:00 AM, David Kang <dkang at isi.edu> wrote:
>> 
>>> 
>>> Is volume attachment to an LXC instance is broken?
>>> 
>>> I'm trying to run the following command:
>>> $ euca-attach-volume vol-00000007 -i i-0000000b -d /dev/vdc
>>> 
>>> It fails and the nova-compute log is copied and pasted below.
>>> The error message is :
>>>  "InvalidDevicePath: The supplied device path (/dev/a) is invalid."
>>> The device name given is "/dev/vdc", but it looks like that
>>> get_device_name_for_instance()
>>> changes it to '/dev/a'.
>>> And it ends up the error of "InvalidDevicePath".
>>> 
>>> Is it bug or my mistake?
>>> I pulled the nova from github on August 29th.
>>> And the followings are configured in /etc/nova/nova.conf file.
>>>  use_cow_images=True
>>>  libvirt_type=lxc
>>> 
>>> Thanks,
>>> David
>>> 
>>> ------------- log of nova-compute ---------------
>>> 
>>> 2012-09-04 13:37:46 DEBUG nova.utils
>>> [req-79250a0b-6c11-4afc-a0a4-75736d3853c5 admin admin] Got semaphore
>>> "f3fb4350-a72e-404f-a21f-10f333fe67e8" for method "do_reserve"...
>>> from (pid=13108) inner /usr/local/nova/nova/utils.py:712
>>> 2012-09-04 13:37:46 DEBUG nova.utils
>>> [req-79250a0b-6c11-4afc-a0a4-75736d3853c5 admin admin] Attempting to
>>> grab semaphore "compute_resources" for method
>>> "update_load_stats_for_instance"... from (pid=13108) inner
>>> /usr/local/nova/nova/utils.py:708
>>> 2012-09-04 13:37:46 DEBUG nova.utils
>>> [req-79250a0b-6c11-4afc-a0a4-75736d3853c5 admin admin] Got semaphore
>>> "compute_resources" for method "update_load_stats_for_instance"...
>>> from (pid=13108) inner /usr/local/nova/nova/utils.py:712
>>> 2012-09-04 13:37:46 ERROR nova.openstack.common.rpc.amqp [-]
>>> Exception during message handling
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp Traceback
>>> (most recent call last):
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/openstack/common/rpc/amqp.py", line 275, in
>>> _process_data
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp rval =
>>> self.proxy.dispatch(ctxt, version, method, **args)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/openstack/common/rpc/dispatcher.py", line 145,
>>> in dispatch
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp return
>>> getattr(proxyobj, method)(ctxt, **kwargs)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/exception.py", line 117, in wrapped
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp temp_level,
>>> payload)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> self.gen.next()
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/exception.py", line 92, in wrapped
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp return
>>> f(*args, **kw)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 211, in
>>> decorated_function
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp pass
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> self.gen.next()
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 204, in
>>> decorated_function
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp return
>>> function(self, context, *args, **kwargs)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 237, in
>>> decorated_function
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> instance_uuid, e, sys.exc_info())
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> self.gen.next()
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 226, in
>>> decorated_function
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp return
>>> function(self, context, *args, **kwargs)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 2057, in
>>> reserve_block_device_name
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp return
>>> do_reserve()
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/utils.py", line 733, in inner
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp retval =
>>> f(*args, **kwargs)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/manager.py", line 2051, in do_reserve
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp device)
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp File
>>> "/usr/local/nova/nova/compute/utils.py", line 56, in
>>> get_device_name_for_instance
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp raise
>>> exception.InvalidDevicePath(path=mappings['root'])
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> InvalidDevicePath: The supplied device path (/dev/a) is invalid.
>>> 2012-09-04 13:37:46 TRACE nova.openstack.common.rpc.amqp
>>> 2012-09-04 13:37:46 ERROR nova.openstack.common.rpc.common [-]
>>> Returning exception The supplied device path (/dev/a) is invalid. to
>>> caller
>>> 2012-09-04 13:37:46 ERROR nova.openstack.common.rpc.common [-]
>>> ['Traceback (most recent call last):\n', ' File
>>> "/usr/local/nova/nova/openstack/common/rpc/amqp.py", line 275, in
>>> _process_data\n rval = self.proxy.dispatch(ctxt, version, method,
>>> **args)\n', ' File
>>> "/usr/local/nova/nova/openstack/common/rpc/dispatcher.py", line 145,
>>> in dispatch\n return getattr(proxyobj, method)(ctxt, **kwargs)\n', '
>>> File "/usr/local/nova/nova/exception.py", line 117, in wrapped\n
>>> temp_level, payload)\n', ' File
>>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__\n
>>> self.gen.next()\n', ' File "/usr/local/nova/nova/exception.py", line
>>> 92, in wrapped\n return f(*args, **kw)\n', ' File
>>> "/usr/local/nova/nova/compute/manager.py", line 211, in
>>> decorated_function\n pass\n', ' File
>>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__\n
>>> self.gen.next()\n', ' File
>>> "/usr/local/nova/nova/compute/manager.py", line 204, in
>>> decorated_function\n return function(self!
>> , context, *args, **kwargs)\n', ' File
>> "/usr/local/nova/nova/compute/manager.py", line 237, in
>> decorated_function\n instance_uuid, e, sys.exc_info())\n', ' File
>> "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__\n
>> self.gen.next()\n', ' File "/usr/local/nova/nova/compute/manager.py",
>> line 226, in decorated_function\n return function(self, context,
>> *args, **kwargs)\n', ' File "/usr/local/nova/nova/compute/manager.py",
>> line 2057, in reserve_block_device_name\n return do_reserve()\n', '
>> File "/usr/local/nova/nova/utils.py", line 733, in inner\n retval =
>> f(*args, **kwargs)\n', ' File
>> "/usr/local/nova/nova/compute/manager.py", line 2051, in do_reserve\n
>> device)\n', ' File "/usr/local/nova/nova/compute/utils.py", line 56,
>> in get_device_name_for_instance\n raise
>> exception.InvalidDevicePath(path=mappings[\'root\'])\n',
>> 'InvalidDevicePath: The supplied device path (/dev/a) is invalid.\n']
>>> 
>>> 
>>> 
>>> ----------------------
>>> Dr. Dong-In "David" Kang
>>> Computer Scientist
>>> USC/ISI
>>> 
>>> _______________________________________________
>>> OpenStack-dev mailing list
>>> OpenStack-dev at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>> 
>> 
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>> OpenStack-dev at lists.openstack.org
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> 
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