def find_bad_volumes(self, vm_ref):
"""Find any volumes with their connection severed.
Certain VM operations (e.g. `VM.start`, `VM.reboot`, etc.) will not
work when a VBD is present that points to a non-working volume. To work
around this, we scan for non-working volumes and detach them before
retrying a failed operation.
"""
bad_devices = []
vbd_refs = self._get_all_volume_vbd_refs(vm_ref)
for vbd_ref in vbd_refs:
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
try:
# TODO(sirp): bug1152401 This relies on a 120 sec timeout
# within XenServer, update this to fail-fast when this is fixed
# upstream
self._session.SR.scan(sr_ref)
except self._session.XenAPI.Failure as exc:
if exc.details[0] == 'SR_BACKEND_FAILURE_40':
device = self._session.VBD.get_device(vbd_ref)
bad_devices.append('/dev/%s' % device)
else:
raise
return bad_devices
def find_bad_volumes(self, vm_ref):
"""Find any volumes with their connection severed.
Certain VM operations (e.g. `VM.start`, `VM.reboot`, etc.) will not
work when a VBD is present that points to a non-working volume. To work
around this, we scan for non-working volumes and detach them before
retrying a failed operation.
"""
bad_devices = []
vbd_refs = self._get_all_volume_vbd_refs(vm_ref)
for vbd_ref in vbd_refs:
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
try:
# TODO(sirp): bug1152401 This relies on a 120 sec timeout
# within XenServer, update this to fail-fast when this is fixed
# upstream
self._session.SR.scan(sr_ref)
except self._session.XenAPI.Failure as exc:
if exc.details[0] == 'SR_BACKEND_FAILURE_40':
device = self._session.VBD.get_device(vbd_ref)
bad_devices.append('/dev/%s' % device)
else:
raise
return bad_devices
def _detach_vbds_and_srs(self, vm_ref, vbd_refs):
is_vm_shutdown = vm_utils.is_vm_shutdown(self._session, vm_ref)
for vbd_ref in vbd_refs:
# find sr before we destroy the vbd
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
if not is_vm_shutdown:
vm_utils.unplug_vbd(self._session, vbd_ref, vm_ref)
vm_utils.destroy_vbd(self._session, vbd_ref)
# Forget (i.e. disconnect) SR only if not in use
volume_utils.purge_sr(self._session, sr_ref)
def _detach_vbds_and_srs(self, vm_ref, vbd_refs):
is_vm_shutdown = vm_utils.is_vm_shutdown(self._session, vm_ref)
for vbd_ref in vbd_refs:
# find sr before we destroy the vbd
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
if not is_vm_shutdown:
vm_utils.unplug_vbd(self._session, vbd_ref, vm_ref)
vm_utils.destroy_vbd(self._session, vbd_ref)
# Forget (i.e. disconnect) SR only if not in use
volume_utils.purge_sr(self._session, sr_ref)