def delete(self, context, group, force=False):
if not group.host:
self.update_quota(context, group, -1, group.project_id)
LOG.debug(
"No host for consistency group %s. Deleting from "
"the database.", group.id)
group.destroy()
return
if not force and group.status not in ([
c_fields.ConsistencyGroupStatus.AVAILABLE,
c_fields.ConsistencyGroupStatus.ERROR
]):
msg = _("Consistency group status must be available or error, "
"but current status is: %s") % group.status
raise exception.InvalidConsistencyGroup(reason=msg)
cgsnapshots = objects.CGSnapshotList.get_all_by_group(
context.elevated(), group.id)
if cgsnapshots:
msg = _("Consistency group %s still has dependent "
"cgsnapshots.") % group.id
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
volumes = self.db.volume_get_all_by_group(context.elevated(), group.id)
if volumes and not force:
msg = _("Consistency group %s still contains volumes. "
"The force flag is required to delete it.") % group.id
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
for volume in volumes:
if volume['attach_status'] == "attached":
msg = _("Volume in consistency group %s is attached. "
"Need to detach first.") % group.id
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
snapshots = objects.SnapshotList.get_all_for_volume(
context, volume['id'])
if snapshots:
msg = _("Volume in consistency group still has "
"dependent snapshots.")
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
group.status = c_fields.ConsistencyGroupStatus.DELETING
group.terminated_at = timeutils.utcnow()
group.save()
self.volume_rpcapi.delete_consistencygroup(context, group)
def delete(self, context, group, force=False):
if not group['host']:
self.update_quota(context, group['id'], -1, group['project_id'])
msg = ("No host for consistency group %s. Deleting from "
"the database.") % group['id']
LOG.debug(msg)
self.db.consistencygroup_destroy(context.elevated(), group['id'])
return
if not force and group['status'] not in ["available", "error"]:
msg = _("Consistency group status must be available or error, "
"but current status is: %s") % group['status']
raise exception.InvalidConsistencyGroup(reason=msg)
cgsnaps = self.db.cgsnapshot_get_all_by_group(context.elevated(),
group['id'])
if cgsnaps:
msg = _("Consistency group %s still has dependent "
"cgsnapshots.") % group['id']
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
volumes = self.db.volume_get_all_by_group(context.elevated(),
group['id'])
if volumes and not force:
msg = _("Consistency group %s still contains volumes. "
"The force flag is required to delete it.") % group['id']
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
for volume in volumes:
if volume['attach_status'] == "attached":
msg = _("Volume in consistency group %s is attached. "
"Need to detach first.") % group['id']
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
snapshots = self.db.snapshot_get_all_for_volume(
context, volume['id'])
if snapshots:
msg = _("Volume in consistency group still has "
"dependent snapshots.")
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
now = timeutils.utcnow()
self.db.consistencygroup_update(context, group['id'], {
'status': 'deleting',
'terminated_at': now
})
self.volume_rpcapi.delete_consistencygroup(context, group)
def _create_cg_from_cgsnapshot(self, context, group, cgsnapshot):
try:
snapshots = objects.SnapshotList.get_all_for_cgsnapshot(
context, cgsnapshot.id)
if not snapshots:
msg = _("Cgsnahost is empty. No consistency group "
"will be created.")
raise exception.InvalidConsistencyGroup(reason=msg)
for snapshot in snapshots:
kwargs = {}
kwargs['availability_zone'] = group.availability_zone
kwargs['cgsnapshot'] = cgsnapshot
kwargs['consistencygroup'] = group
kwargs['snapshot'] = snapshot
volume_type_id = snapshot.volume_type_id
if volume_type_id:
kwargs['volume_type'] = volume_types.get_volume_type(
context, volume_type_id)
# Since cgsnapshot is passed in, the following call will
# create a db entry for the volume, but will not call the
# volume manager to create a real volume in the backend yet.
# If error happens, taskflow will handle rollback of quota
# and removal of volume entry in the db.
try:
self.volume_api.create(context, snapshot.volume_size, None,
None, **kwargs)
except exception.CinderException:
with excutils.save_and_reraise_exception():
LOG.error(
_LE("Error occurred when creating volume "
"entry from snapshot in the process of "
"creating consistency group %(group)s "
"from cgsnapshot %(cgsnap)s."), {
'group': group.id,
'cgsnap': cgsnapshot.id
})
except Exception:
with excutils.save_and_reraise_exception():
try:
group.destroy()
finally:
LOG.error(
_LE("Error occurred when creating consistency "
"group %(group)s from cgsnapshot "
"%(cgsnap)s."), {
'group': group.id,
'cgsnap': cgsnapshot.id
})
volumes = self.db.volume_get_all_by_group(context, group.id)
for vol in volumes:
# Update the host field for the volume.
self.db.volume_update(context, vol['id'],
{'host': group.get('host')})
self.volume_rpcapi.create_consistencygroup_from_src(
context, group, cgsnapshot)
def _create_cg_from_source_cg(self, context, group, source_cg):
try:
source_vols = self.db.volume_get_all_by_group(context,
source_cg.id)
if not source_vols:
msg = _("Source CG is empty. No consistency group "
"will be created.")
raise exception.InvalidConsistencyGroup(reason=msg)
for source_vol in source_vols:
kwargs = {}
kwargs['availability_zone'] = group.availability_zone
kwargs['source_cg'] = source_cg
kwargs['consistencygroup'] = group
kwargs['source_volume'] = source_vol
volume_type_id = source_vol.get('volume_type_id')
if volume_type_id:
kwargs['volume_type'] = volume_types.get_volume_type(
context, volume_type_id)
# Since source_cg is passed in, the following call will
# create a db entry for the volume, but will not call the
# volume manager to create a real volume in the backend yet.
# If error happens, taskflow will handle rollback of quota
# and removal of volume entry in the db.
try:
self.volume_api.create(context,
source_vol['size'],
None,
None,
**kwargs)
except exception.CinderException:
with excutils.save_and_reraise_exception():
LOG.error(_LE("Error occurred when creating cloned "
"volume in the process of creating "
"consistency group %(group)s from "
"source CG %(source_cg)s."),
{'group': group.id,
'source_cg': source_cg.id})
except Exception:
with excutils.save_and_reraise_exception():
try:
group.destroy()
finally:
LOG.error(_LE("Error occurred when creating consistency "
"group %(group)s from source CG "
"%(source_cg)s."),
{'group': group.id,
'source_cg': source_cg.id})
volumes = self.db.volume_get_all_by_group(context,
group.id)
for vol in volumes:
# Update the host field for the volume.
self.db.volume_update(context, vol['id'],
{'host': group.host})
self.volume_rpcapi.create_consistencygroup_from_src(context, group,
None, source_cg)
def delete(self, context, group, force=False):
if not group.host:
self.update_quota(context, group, -1, group.project_id)
LOG.debug("No host for consistency group %s. Deleting from "
"the database.", group.id)
group.destroy()
return
if force:
expected = {}
else:
expected = {'status': (c_fields.ConsistencyGroupStatus.AVAILABLE,
c_fields.ConsistencyGroupStatus.ERROR)}
filters = [~db.cg_has_cgsnapshot_filter(),
~db.cg_has_volumes_filter(attached_or_with_snapshots=force),
~db.cg_creating_from_src(cg_id=group.id)]
values = {'status': c_fields.ConsistencyGroupStatus.DELETING}
if not group.conditional_update(values, expected, filters):
if force:
reason = _('Consistency group must not have attached volumes, '
'volumes with snapshots, or dependent cgsnapshots')
else:
reason = _('Consistency group status must be available or '
'error and must not have volumes or dependent '
'cgsnapshots')
msg = (_('Cannot delete consistency group %(id)s. %(reason)s, and '
'it cannot be the source for an ongoing CG or CG '
'Snapshot creation.')
% {'id': group.id, 'reason': reason})
raise exception.InvalidConsistencyGroup(reason=msg)
self.volume_rpcapi.delete_consistencygroup(context, group)
def _check_update(self, group, name, description, add_volumes,
remove_volumes, allow_empty=False):
if allow_empty:
if (name is None and description is None
and not add_volumes and not remove_volumes):
msg = (_("Cannot update consistency group %(group_id)s "
"because no valid name, description, add_volumes, "
"or remove_volumes were provided.") %
{'group_id': group.id})
raise exception.InvalidConsistencyGroup(reason=msg)
else:
if not (name or description or add_volumes or remove_volumes):
msg = (_("Cannot update consistency group %(group_id)s "
"because no valid name, description, add_volumes, "
"or remove_volumes were provided.") %
{'group_id': group.id})
raise exception.InvalidConsistencyGroup(reason=msg)
def create_from_src(self, context, name, description=None,
cgsnapshot_id=None, source_cgid=None):
check_policy(context, 'create')
kwargs = {
'user_id': context.user_id,
'project_id': context.project_id,
'status': c_fields.ConsistencyGroupStatus.CREATING,
'name': name,
'description': description,
'cgsnapshot_id': cgsnapshot_id,
'source_cgid': source_cgid,
}
group = None
try:
group = objects.ConsistencyGroup(context=context, **kwargs)
group.create(cg_snap_id=cgsnapshot_id, cg_id=source_cgid)
except exception.ConsistencyGroupNotFound:
with excutils.save_and_reraise_exception():
LOG.error(_LE("Source CG %(source_cg)s not found when "
"creating consistency group %(cg)s from "
"source."),
{'cg': name, 'source_cg': source_cgid})
except exception.CgSnapshotNotFound:
with excutils.save_and_reraise_exception():
LOG.error(_LE("CG snapshot %(cgsnap)s not found when creating "
"consistency group %(cg)s from source."),
{'cg': name, 'cgsnap': cgsnapshot_id})
except Exception:
with excutils.save_and_reraise_exception():
LOG.error(_LE("Error occurred when creating consistency group"
" %(cg)s from cgsnapshot %(cgsnap)s."),
{'cg': name, 'cgsnap': cgsnapshot_id})
# Update quota for consistencygroups
self.update_quota(context, group, 1)
if not group.host:
msg = _("No host to create consistency group %s.") % group.id
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
if cgsnapshot_id:
self._create_cg_from_cgsnapshot(context, group, cgsnapshot_id)
elif source_cgid:
self._create_cg_from_source_cg(context, group, source_cgid)
return group
def create_from_src(self, context, name, description, cgsnapshot_id):
check_policy(context, 'create')
cgsnapshot = None
orig_cg = None
if cgsnapshot_id:
cgsnapshot = self.db.cgsnapshot_get(context, cgsnapshot_id)
if cgsnapshot:
orig_cg = self.db.consistencygroup_get(
context, cgsnapshot['consistencygroup_id'])
options = {
'user_id': context.user_id,
'project_id': context.project_id,
'status': "creating",
'name': name,
'description': description,
'cgsnapshot_id': cgsnapshot_id
}
if orig_cg:
options['volume_type_id'] = orig_cg.get('volume_type_id')
options['availability_zone'] = orig_cg.get('availability_zone')
options['host'] = orig_cg.get('host')
group = None
try:
group = self.db.consistencygroup_create(context, options)
except Exception:
with excutils.save_and_reraise_exception():
LOG.error(
_LE("Error occurred when creating consistency group"
" %(cg)s from cgsnapshot %(cgsnap)s."), {
'cg': name,
'cgsnap': cgsnapshot_id
})
# Update quota for consistencygroups
self.update_quota(context, group['id'], 1)
if not group['host']:
msg = _("No host to create consistency group %s.") % group['id']
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
self._create_cg_from_cgsnapshot(context, group, cgsnapshot)
return group
def _extract_consistencygroup(consistencygroup):
"""Extracts the consistencygroup id from the provided consistencygroup.
This function validates the input consistencygroup dict and checks that
the status of that consistencygroup is valid for creating a volume in.
"""
consistencygroup_id = None
if consistencygroup is not None:
if consistencygroup['status'] not in CG_PROCEED_STATUS:
msg = _("Originating consistencygroup status must be one"
" of '%s' values")
msg = msg % (", ".join(CG_PROCEED_STATUS))
raise exception.InvalidConsistencyGroup(reason=msg)
consistencygroup_id = consistencygroup['id']
return consistencygroup_id
def _create_cgsnapshot(self, context, group, name, description):
volumes = self.db.volume_get_all_by_group(context.elevated(), group.id)
if not volumes:
msg = _("Consistency group is empty. No cgsnapshot "
"will be created.")
raise exception.InvalidConsistencyGroup(reason=msg)
options = {
'consistencygroup_id': group.id,
'user_id': context.user_id,
'project_id': context.project_id,
'status': "creating",
'name': name,
'description': description
}
cgsnapshot = None
cgsnapshot_id = None
try:
cgsnapshot = objects.CGSnapshot(context, **options)
cgsnapshot.create()
cgsnapshot_id = cgsnapshot.id
snap_name = cgsnapshot.name
snap_desc = cgsnapshot.description
self.volume_api.create_snapshots_in_db(context, volumes, snap_name,
snap_desc, True,
cgsnapshot_id)
except Exception:
with excutils.save_and_reraise_exception():
try:
if cgsnapshot:
cgsnapshot.destroy()
finally:
LOG.error(
_LE("Error occurred when creating cgsnapshot"
" %s."), cgsnapshot_id)
self.volume_rpcapi.create_cgsnapshot(context, cgsnapshot)
return cgsnapshot
def update(self,
context,
group,
name,
description,
add_volumes,
remove_volumes,
allow_empty=False):
"""Update consistency group."""
add_volumes_list = []
remove_volumes_list = []
if add_volumes:
add_volumes = add_volumes.strip(',')
add_volumes_list = add_volumes.split(',')
if remove_volumes:
remove_volumes = remove_volumes.strip(',')
remove_volumes_list = remove_volumes.split(',')
invalid_uuids = []
for uuid in add_volumes_list:
if uuid in remove_volumes_list:
invalid_uuids.append(uuid)
if invalid_uuids:
msg = _("UUIDs %s are in both add and remove volume "
"list.") % invalid_uuids
raise exception.InvalidVolume(reason=msg)
# Validate name.
if name == group.name:
name = None
# Validate description.
if description == group.description:
description = None
self._check_update(group, name, description, add_volumes,
remove_volumes, allow_empty)
fields = {'updated_at': timeutils.utcnow()}
# Update name and description in db now. No need to
# to send them over through an RPC call.
if allow_empty:
if name is not None:
fields['name'] = name
if description is not None:
fields['description'] = description
else:
if name:
fields['name'] = name
if description:
fields['description'] = description
# NOTE(geguileo): We will use the updating status in the CG as a lock
# mechanism to prevent volume add/remove races with other API, while we
# figure out if we really need to add or remove volumes.
if add_volumes or remove_volumes:
fields['status'] = c_fields.ConsistencyGroupStatus.UPDATING
# We cannot modify the members of this CG if the CG is being used
# to create another CG or a CGsnapshot is being created
filters = [
~db.cg_creating_from_src(cg_id=group.id),
~db.cgsnapshot_creating_from_src()
]
else:
filters = []
expected = {'status': c_fields.ConsistencyGroupStatus.AVAILABLE}
if not group.conditional_update(fields, expected, filters):
msg = _("Cannot update consistency group %s, status must be "
"available, and it cannot be the source for an ongoing "
"CG or CG Snapshot creation.") % group.id
raise exception.InvalidConsistencyGroup(reason=msg)
# Now the CG is "locked" for updating
try:
# Validate volumes in add_volumes and remove_volumes.
add_volumes_new = self._validate_add_volumes(
context, group.volumes, add_volumes_list, group)
remove_volumes_new = self._validate_remove_volumes(
group.volumes, remove_volumes_list, group)
self._check_update(group, name, description, add_volumes_new,
remove_volumes_new, allow_empty)
except Exception:
# If we have an error on the volume_lists we must return status to
# available as we were doing before removing API races
with excutils.save_and_reraise_exception():
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()
# Do an RPC call only if the update request includes
# adding/removing volumes. add_volumes_new and remove_volumes_new
# are strings of volume UUIDs separated by commas with no spaces
# in between.
if add_volumes_new or remove_volumes_new:
self.volume_rpcapi.update_consistencygroup(
context,
group,
add_volumes=add_volumes_new,
remove_volumes=remove_volumes_new)
# If there are no new volumes to add or remove and we had changed
# the status to updating, turn it back to available
elif group.status == c_fields.ConsistencyGroupStatus.UPDATING:
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()
def update(self, context, group, name, description, add_volumes,
remove_volumes):
"""Update consistency group."""
if group.status != c_fields.ConsistencyGroupStatus.AVAILABLE:
msg = _("Consistency group status must be available, "
"but current status is: %s.") % group.status
raise exception.InvalidConsistencyGroup(reason=msg)
add_volumes_list = []
remove_volumes_list = []
if add_volumes:
add_volumes = add_volumes.strip(',')
add_volumes_list = add_volumes.split(',')
if remove_volumes:
remove_volumes = remove_volumes.strip(',')
remove_volumes_list = remove_volumes.split(',')
invalid_uuids = []
for uuid in add_volumes_list:
if uuid in remove_volumes_list:
invalid_uuids.append(uuid)
if invalid_uuids:
msg = _("UUIDs %s are in both add and remove volume "
"list.") % invalid_uuids
raise exception.InvalidVolume(reason=msg)
volumes = self.db.volume_get_all_by_group(context, group.id)
# Validate name.
if not name or name == group.name:
name = None
# Validate description.
if not description or description == group.description:
description = None
# Validate volumes in add_volumes and remove_volumes.
add_volumes_new = ""
remove_volumes_new = ""
if add_volumes_list:
add_volumes_new = self._validate_add_volumes(
context, volumes, add_volumes_list, group)
if remove_volumes_list:
remove_volumes_new = self._validate_remove_volumes(
volumes, remove_volumes_list, group)
if (not name and not description and not add_volumes_new
and not remove_volumes_new):
msg = (_("Cannot update consistency group %(group_id)s "
"because no valid name, description, add_volumes, "
"or remove_volumes were provided.") % {
'group_id': group.id
})
raise exception.InvalidConsistencyGroup(reason=msg)
fields = {'updated_at': timeutils.utcnow()}
# Update name and description in db now. No need to
# to send them over through an RPC call.
if name:
fields['name'] = name
if description:
fields['description'] = description
if not add_volumes_new and not remove_volumes_new:
# Only update name or description. Set status to available.
fields['status'] = 'available'
else:
fields['status'] = 'updating'
group.update(fields)
group.save()
# Do an RPC call only if the update request includes
# adding/removing volumes. add_volumes_new and remove_volumes_new
# are strings of volume UUIDs separated by commas with no spaces
# in between.
if add_volumes_new or remove_volumes_new:
self.volume_rpcapi.update_consistencygroup(
context,
group,
add_volumes=add_volumes_new,
remove_volumes=remove_volumes_new)
def create_from_src(self,
context,
name,
description=None,
cgsnapshot_id=None,
source_cgid=None):
check_policy(context, 'create')
cgsnapshot = None
orig_cg = None
if cgsnapshot_id:
try:
cgsnapshot = objects.CGSnapshot.get_by_id(
context, cgsnapshot_id)
except exception.CgSnapshotNotFound:
with excutils.save_and_reraise_exception():
LOG.error(
_LE("CG snapshot %(cgsnap)s not found when "
"creating consistency group %(cg)s from "
"source."), {
'cg': name,
'cgsnap': cgsnapshot_id
})
else:
orig_cg = cgsnapshot.consistencygroup
source_cg = None
if source_cgid:
try:
source_cg = objects.ConsistencyGroup.get_by_id(
context, source_cgid)
except exception.ConsistencyGroupNotFound:
with excutils.save_and_reraise_exception():
LOG.error(
_LE("Source CG %(source_cg)s not found when "
"creating consistency group %(cg)s from "
"source."), {
'cg': name,
'source_cg': source_cgid
})
kwargs = {
'user_id': context.user_id,
'project_id': context.project_id,
'status': c_fields.ConsistencyGroupStatus.CREATING,
'name': name,
'description': description,
'cgsnapshot_id': cgsnapshot_id,
'source_cgid': source_cgid,
}
if orig_cg:
kwargs['volume_type_id'] = orig_cg.volume_type_id
kwargs['availability_zone'] = orig_cg.availability_zone
kwargs['host'] = orig_cg.host
if source_cg:
kwargs['volume_type_id'] = source_cg.volume_type_id
kwargs['availability_zone'] = source_cg.availability_zone
kwargs['host'] = source_cg.host
group = None
try:
group = objects.ConsistencyGroup(context=context, **kwargs)
group.create()
except Exception:
with excutils.save_and_reraise_exception():
LOG.error(
_LE("Error occurred when creating consistency group"
" %(cg)s from cgsnapshot %(cgsnap)s."), {
'cg': name,
'cgsnap': cgsnapshot_id
})
# Update quota for consistencygroups
self.update_quota(context, group, 1)
if not group.host:
msg = _("No host to create consistency group %s.") % group.id
LOG.error(msg)
raise exception.InvalidConsistencyGroup(reason=msg)
if cgsnapshot:
self._create_cg_from_cgsnapshot(context, group, cgsnapshot)
elif source_cg:
self._create_cg_from_source_cg(context, group, source_cg)
return group
def _create_cg_from_source_cg(self, context, group, source_cgid):
try:
source_cg = objects.ConsistencyGroup.get_by_id(
context, source_cgid)
source_vols = self.db.volume_get_all_by_group(
context, source_cg.id)
if not source_vols:
msg = _("Source CG is empty. No consistency group "
"will be created.")
raise exception.InvalidConsistencyGroup(reason=msg)
try:
values = {'volumes': len(source_vols)}
QUOTAS.limit_check(context,
project_id=context.project_id,
**values)
except exception.OverQuota as e:
group.destroy()
quotas = e.kwargs['quotas']
raise exception.VolumeLimitExceeded(allowed=e.kwargs['overs'],
limit=quotas['volumes'])
for source_vol in source_vols:
kwargs = {}
kwargs['availability_zone'] = group.availability_zone
kwargs['source_cg'] = source_cg
kwargs['consistencygroup'] = group
kwargs['source_volume'] = source_vol
volume_type_id = source_vol.get('volume_type_id')
if volume_type_id:
kwargs['volume_type'] = (
objects.VolumeType.get_by_name_or_id(
context, volume_type_id))
# Since source_cg is passed in, the following call will
# create a db entry for the volume, but will not call the
# volume manager to create a real volume in the backend yet.
# If error happens, taskflow will handle rollback of quota
# and removal of volume entry in the db.
try:
self.volume_api.create(context, source_vol['size'], None,
None, **kwargs)
except exception.CinderException:
with excutils.save_and_reraise_exception():
LOG.error(
"Error occurred when creating cloned "
"volume in the process of creating "
"consistency group %(group)s from "
"source CG %(source_cg)s.", {
'group': group.id,
'source_cg': source_cg.id
})
except Exception:
with excutils.save_and_reraise_exception():
try:
new_vols = self.db.volume_get_all_by_group(
context, group.id)
for vol in new_vols:
self.volume_api.delete(context, vol, force=True)
group.destroy()
finally:
LOG.error(
"Error occurred when creating consistency "
"group %(group)s from source CG "
"%(source_cg)s.", {
'group': group.id,
'source_cg': source_cg.id
})
volumes = self.db.volume_get_all_by_group(context, group.id)
for vol in volumes:
# Update the host field for the volume.
self.db.volume_update(context, vol['id'], {'host': group.host})
self.volume_rpcapi.create_consistencygroup_from_src(
context, group, None, source_cg)
