vm_ref = VMHelper.lookup(self._session, instance_name)
if vm_ref is None:
raise exception.NotFound(
_('Instance %s not found') % instance_name)
# Detach VBD from VM
LOG.debug(
_("Detach_volume: %(instance_name)s, %(mountpoint)s") % locals())
device_number = VolumeHelper.mountpoint_to_number(mountpoint)
try:
vbd_ref = VMHelper.find_vbd_by_number(self._session, vm_ref,
device_number)
except StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to locate volume %s') % mountpoint)
else:
try:
sr_ref = VolumeHelper.find_sr_from_vbd(self._session, vbd_ref)
VMHelper.unplug_vbd(self._session, vbd_ref)
except StorageError, exc:
LOG.exception(exc)
raise Exception(_('Unable to detach volume %s') % mountpoint)
try:
VMHelper.destroy_vbd(self._session, vbd_ref)
except StorageError, exc:
LOG.exception(exc)
# Forget SR
VolumeHelper.destroy_iscsi_storage(self._session, sr_ref)
LOG.info(
_('Mountpoint %(mountpoint)s detached from'
' instance %(instance_name)s') % locals())
LOG.info(_("Mountpoint %(mountpoint)s attached to" " instance %(instance_name)s") % locals())
def detach_volume(self, instance_name, mountpoint):
"""Detach volume storage to VM instance"""
# Before we start, check that the VM exists
vm_ref = VMHelper.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 = VolumeHelper.mountpoint_to_number(mountpoint)
try:
vbd_ref = VMHelper.find_vbd_by_number(self._session, vm_ref, device_number)
except StorageError, exc:
LOG.exception(exc)
raise Exception(_("Unable to locate volume %s") % mountpoint)
else:
try:
sr_ref = VolumeHelper.find_sr_from_vbd(self._session, vbd_ref)
VMHelper.unplug_vbd(self._session, vbd_ref)
except StorageError, exc:
LOG.exception(exc)
raise Exception(_("Unable to detach volume %s") % mountpoint)
try:
VMHelper.destroy_vbd(self._session, vbd_ref)
except StorageError, exc:
LOG.exception(exc)
# Forget SR
VolumeHelper.destroy_iscsi_storage(self._session, sr_ref)
LOG.info(_("Mountpoint %(mountpoint)s detached from" " instance %(instance_name)s") % locals())
