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.call_xenapi("SR.scan", sr_ref)
except self._session.XenAPI.Failure, exc:
if exc.details[0] == 'SR_BACKEND_FAILURE_40':
vbd_rec = vbd_rec = self._session.call_xenapi(
"VBD.get_record", vbd_ref)
bad_devices.append('/dev/%s' % vbd_rec['device'])
else:
raise
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.call_xenapi("SR.scan", sr_ref)
except self._session.XenAPI.Failure as exc:
if exc.details[0] == 'SR_BACKEND_FAILURE_40':
vbd_rec = vbd_rec = self._session.call_xenapi(
"VBD.get_record", vbd_ref)
bad_devices.append('/dev/%s' % vbd_rec['device'])
else:
raise
return bad_devices
def _detach_vbd(self, vbd_ref, unplug=False):
if unplug:
vm_utils.unplug_vbd(self._session, vbd_ref)
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
vm_utils.destroy_vbd(self._session, vbd_ref)
# Forget SR only if not in use
volume_utils.purge_sr(self._session, sr_ref)
def _detach_vbd(self, vbd_ref, unplug=False):
if unplug:
vm_utils.unplug_vbd(self._session, vbd_ref)
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
vm_utils.destroy_vbd(self._session, vbd_ref)
# Forget 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)
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_volume(self, connection_info, instance_name, mountpoint):
"""Detach volume storage to VM instance."""
vm_ref = vm_utils.vm_ref_or_raise(self._session, instance_name)
# Detach VBD from VM
LOG.debug(
_("Detach_volume: %(instance_name)s, %(mountpoint)s") % locals())
device_number = volume_utils.get_device_number(mountpoint)
try:
vbd_ref = vm_utils.find_vbd_by_number(self._session, vm_ref,
device_number)
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to locate volume %s') % mountpoint)
def detach_volume(self, connection_info, instance_name, mountpoint):
"""Detach volume storage to VM instance."""
vm_ref = vm_utils.vm_ref_or_raise(self._session, instance_name)
# Detach VBD from VM
LOG.debug(_("Detach_volume: %(instance_name)s, %(mountpoint)s")
% locals())
device_number = volume_utils.get_device_number(mountpoint)
try:
vbd_ref = vm_utils.find_vbd_by_number(self._session, vm_ref,
device_number)
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to locate volume %s') % mountpoint)
vm_ref = vm_utils.vm_ref_or_raise(self._session, instance_name)
# Detach VBD from VM
LOG.debug(
_("Detach_volume: %(instance_name)s, %(mountpoint)s") % locals())
device_number = volume_utils.mountpoint_to_number(mountpoint)
try:
vbd_ref = vm_utils.find_vbd_by_number(self._session, vm_ref,
device_number)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to locate volume %s') % mountpoint)
try:
vm_rec = self._session.call_xenapi("VM.get_record", vm_ref)
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
if vm_rec['power_state'] != 'Halted':
vm_utils.unplug_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to detach volume %s') % mountpoint)
try:
vm_utils.destroy_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to destroy vbd %s') % mountpoint)
# Forget SR only if no other volumes on this host are using it
try:
volume_utils.purge_sr(self._session, sr_ref)
except volume_utils.StorageError, exc:
vm_ref = vm_utils.lookup(self._session, instance_name)
if vm_ref is None:
raise exception.InstanceNotFound(instance_id=instance_name)
# Detach VBD from VM
LOG.debug(_("Detach_volume: %(instance_name)s, %(mountpoint)s")
% locals())
device_number = volume_utils.mountpoint_to_number(mountpoint)
try:
vbd_ref = vm_utils.find_vbd_by_number(self._session, vm_ref,
device_number)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to locate volume %s') % mountpoint)
try:
sr_ref = volume_utils.find_sr_from_vbd(self._session, vbd_ref)
vm_utils.unplug_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to detach volume %s') % mountpoint)
try:
vm_utils.destroy_vbd(self._session, vbd_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to destroy vbd %s') % mountpoint)
# Forget SR only if no other volumes on this host are using it
try:
volume_utils.purge_sr(self._session, sr_ref)
except volume_utils.StorageError, exc:
LOG.exception(exc)
