def _cascade_volume_delete(self, o_vname, o_snaps):
"""Delete or hides volume(if it is busy)
Go over snapshots and deletes them if possible
Calls for recursive volume deletion if volume do not have children
"""
vsnaps = []
deletable = True
for snap in o_snaps:
if jcom.is_snapshot(snap['name']):
vsnaps += [(snap['name'],
jcom.full_name_volume(snap['clones']))]
active_vsnaps = [vs for vs in vsnaps if jcom.is_hidden(vs[1]) is False]
# If volume have clones or hidden snapshots it should be hidden
if len(active_vsnaps) < len(o_snaps):
deletable = False
for vsnap in active_vsnaps:
psnap = []
try:
psnap = self.ra.get_snapshots(vsnap[1])
except jexc.JDSSException as jerr:
msg = (_('Failure in acquiring snapshot for %s.') % vsnap[1])
raise exception.VolumeBackendAPIException(msg) from jerr
try:
psnap = self._clean_garbage_snapshots(vsnap[1], psnap)
except exception.VolumeBackendAPIException as err:
msg = (_('Failure in cleaning garbage snapshots %s'
' for volume %s, %s') % psnap, vsnap[1], err)
raise exception.VolumeBackendAPIException(msg) from err
if len(psnap) > 0:
deletable = False
self._hide_object(vsnap[1])
else:
try:
self.ra.delete_snapshot(o_vname,
vsnap[0],
recursively_children=True,
recursively_dependents=True,
force_umount=True)
except jexc.JDSSException as jerr:
LOG.warning(
'Failure during deletion of physical '
'snapshot %s, err: %s', vsnap[0], jerr)
msg = (_('Failure during deletion of virtual snapshot '
'%s') % vsnap[1])
raise exception.VolumeBackendAPIException(msg)
if deletable:
self._gc_delete(o_vname)
else:
self._hide_object(o_vname)
def _delete_back_recursively(self, opvname, opsname):
"""Deletes snapshot by removing its oldest removable parent
Checks if source volume for this snapshot is hidden:
If it is hidden and have no other descenents, it calls itself on its
source snapshot if such exists, or deletes it
If it is not hidden, trigers delete for snapshot
:param opvname: origin physical volume name
:param opsname: origin physical snapshot name
"""
if jcom.is_hidden(opvname):
# Resource is hidden
snaps = []
try:
snaps = self.ra.get_snapshots(opvname)
except jexc.JDSSResourceNotFoundException:
LOG.debug(
'Unable to get physical snapshots related to'
' physical volume %s, volume do not exist', opvname)
return
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(jerr)
snaps = self._clean_garbage_snapshots(opvname, snaps)
if len(snaps) > 1:
# opvname has active snapshots and cant be deleted
# that is why we delete branch related to opsname
try:
self.ra.delete_snapshot(opvname,
opsname,
recursively_children=True,
recursively_dependents=True,
force_umount=True)
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(jerr)
else:
vol = None
try:
vol = self.ra.get_lun(opvname)
except jexc.JDSSResourceNotFoundException:
LOG.debug(
'volume %s does not exist, it was already '
'deleted.', opvname)
return
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(jerr)
if vol['is_clone']:
self._delete_back_recursively(
jcom.origin_volume(vol['origin']),
jcom.origin_snapshot(vol['origin']))
else:
try:
self.ra.delete_lun(opvname,
recursively_children=True,
recursively_dependents=True,
force_umount=True)
except jexc.JDSSResourceNotFoundException:
LOG.debug(
'volume %s does not exist, it was already '
'deleted.', opvname)
return
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(jerr)
else:
# Resource is active
try:
self.ra.delete_snapshot(opvname,
opsname,
recursively_children=True,
recursively_dependents=True,
force_umount=True)
except jexc.JDSSException as jerr:
raise exception.VolumeBackendAPIException(jerr) from jerr
