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[Bug 1218251] Re: xenapi: permission denied on block device

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Sean Dague <sean@xxxxxxxxx>
Date: Wed, 17 Sep 2014 12:59:29 -0000
Reply-to: Bug 1218251 <1218251@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: nova
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1218251

Title:
  xenapi: permission denied on block device

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  Sometimes this error appears in n-cpu, making the builds fail:

  ERROR nova.virt.xenapi.vm_utils [req-1 demo demo] [instance-1] Failed to fetch glance image
  TRACE nova.virt.xenapi.vm_utils [instance-1] Traceback (most recent call last):
  TRACE nova.virt.xenapi.vm_utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1344, in _fetch_disk_image
  TRACE nova.virt.xenapi.vm_utils [instance-1]     session, image.stream_to, image_type, virtual_size, dev)
  TRACE nova.virt.xenapi.vm_utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 2011, in _stream_disk
  TRACE nova.virt.xenapi.vm_utils [instance-1]     with open(dev_path, 'wb') as f:
  TRACE nova.virt.xenapi.vm_utils [instance-1] IOError: [Errno 13] Permission denied: '/dev/xvdd'
  TRACE nova.virt.xenapi.vm_utils [instance-1] 
  ERROR nova.utils [req-1 demo demo] [instance-1] Failed to spawn, rolling back
  TRACE nova.utils [instance-1] Traceback (most recent call last):
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 497, in spawn
  TRACE nova.utils [instance-1]     vdis = create_disks_step(undo_mgr, disk_image_type, image_meta)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 153, in inner
  TRACE nova.utils [instance-1]     rv = f(*args, **kwargs)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 377, in create_disks_step
  TRACE nova.utils [instance-1]     block_device_info=block_device_info)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 348, in _create_disks
  TRACE nova.utils [instance-1]     block_device_info=block_device_info)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 540, in get_vdis_for_instance
  TRACE nova.utils [instance-1]     context, session, instance, name_label, image, image_type)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1119, in _create_image
  TRACE nova.utils [instance-1]     image_id, image_type)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1062, in _create_cached_image
  TRACE nova.utils [instance-1]     image_id, image_type)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1142, in _fetch_image
  TRACE nova.utils [instance-1]     image_id, image_type)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1344, in _fetch_disk_image
  TRACE nova.utils [instance-1]     session, image.stream_to, image_type, virtual_size, dev)
  TRACE nova.utils [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 2011, in _stream_disk
  TRACE nova.utils [instance-1]     with open(dev_path, 'wb') as f:
  TRACE nova.utils [instance-1] IOError: [Errno 13] Permission denied: '/dev/xvdd'
  TRACE nova.utils [instance-1] 
  ERROR nova.compute.manager [req-1 demo demo] [instance-1] Instance failed to spawn
  TRACE nova.compute.manager [instance-1] Traceback (most recent call last):
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/compute/manager.py", line 1286, in _spawn
  TRACE nova.compute.manager [instance-1]     block_device_info)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 180, in spawn
  TRACE nova.compute.manager [instance-1]     admin_password, network_info, block_device_info)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 514, in spawn
  TRACE nova.compute.manager [instance-1]     undo_mgr.rollback_and_reraise(msg=msg, instance=instance)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/utils.py", line 981, in rollback_and_reraise
  TRACE nova.compute.manager [instance-1]     self._rollback()
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 497, in spawn
  TRACE nova.compute.manager [instance-1]     vdis = create_disks_step(undo_mgr, disk_image_type, image_meta)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 153, in inner
  TRACE nova.compute.manager [instance-1]     rv = f(*args, **kwargs)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 377, in create_disks_step
  TRACE nova.compute.manager [instance-1]     block_device_info=block_device_info)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 348, in _create_disks
  TRACE nova.compute.manager [instance-1]     block_device_info=block_device_info)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 540, in get_vdis_for_instance
  TRACE nova.compute.manager [instance-1]     context, session, instance, name_label, image, image_type)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1119, in _create_image
  TRACE nova.compute.manager [instance-1]     image_id, image_type)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1062, in _create_cached_image
  TRACE nova.compute.manager [instance-1]     image_id, image_type)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1142, in _fetch_image
  TRACE nova.compute.manager [instance-1]     image_id, image_type)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 1344, in _fetch_disk_image
  TRACE nova.compute.manager [instance-1]     session, image.stream_to, image_type, virtual_size, dev)
  TRACE nova.compute.manager [instance-1]   File "/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 2011, in _stream_disk
  TRACE nova.compute.manager [instance-1]     with open(dev_path, 'wb') as f:
  TRACE nova.compute.manager [instance-1] IOError: [Errno 13] Permission denied: '/dev/xvdd'
  TRACE nova.compute.manager [instance-1]

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