def _clone_object(self, oname, coname):
"""Creates a clone of specified object
:param: oname: name of an object to clone
:param: coname: name of a new clone
"""
LOG.debug('cloning %(oname)s to %(coname)s', {
"oname": oname,
"coname": coname
})
try:
self.ra.create_snapshot(oname, coname)
except jexc.JDSSSnapshotExistsException:
try:
self.ra.delete_snapshot(oname, coname)
except jexc.JDSSSnapshotIsBusyException as jerrisbusy:
raise exception.Duplicate() from jerrisbusy
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(
(_("Unable to create volume %s.") % coname)) from jerr
except jexc.JDSSResourceNotFoundException as jerrnotfound:
if jcom.is_volume(oname):
raise exception.VolumeNotFound(
volume_id=jcom.idname(oname)) from jerrnotfound
raise exception.SnapshotNotFound(
snapshot_id=jcom.idname(oname)) from jerrnotfound
except jexc.JDSSException as jerr:
args = {'snapshot': coname, 'object': oname, 'err': jerr}
msg = (_('Failed to create tmp snapshot %(snapshot)s '
'for object %(object)s: %(err)s') % args)
raise exception.VolumeBackendAPIException(msg)
try:
self.ra.create_volume_from_snapshot(coname,
coname,
oname,
sparse=self.jovian_sparse)
except jexc.JDSSResourceExistsException as jerr:
raise exception.Duplicate() from jerr
except jexc.JDSSException as jerr:
try:
self.ra.delete_snapshot(oname,
coname,
recursively_children=True,
recursively_dependents=True,
force_umount=True)
except jexc.JDSSException as jerrd:
LOG.warning(
"Because of %s physical snapshot %s of volume"
" %s have to be removed manually", jerrd, coname, oname)
raise exception.VolumeBackendAPIException(
_("Unable to create volume %(vol)s because of %(err)s.") % {
'vol': coname,
'err': jerr
}) from jerr
def _clean_garbage_snapshots(self, vname, snapshots):
"""Delete physical snapshots that have no descendents"""
garbage = []
for snap in snapshots:
if snap['clones'] == '':
try:
self.ra.delete_snapshot(vname, snap['name'])
except jexc.JDSSException as jerr:
args = {'obj': jcom.idname(vname), 'err': jerr}
msg = (_("Unable to clean garbage for "
"%(obj)s: %(err)s") % args)
raise exception.VolumeBackendAPIException(msg)
garbage.append(snap)
for snap in garbage:
snapshots.remove(snap)
return snapshots