def _check_storage_parameters(self,
context,
vsa_name,
storage,
shared,
first_index=0):
"""
Translates storage array of disks to the list of volumes
:param storage: List of dictionaries with following keys:
disk_name, num_disks, size
:param shared: Specifies if storage is dedicated or shared.
For shared storage disks split into partitions
"""
volume_params = []
for node in storage:
name = node.get('drive_name', None)
num_disks = node.get('num_drives', 1)
if name is None:
msg = _("drive_name not defined")
raise exception.InvalidVolumeType(reason=msg)
try:
vol_type = volume_types.get_volume_type_by_name(context, name)
except exception.NotFound:
msg = _("invalid drive type name %s")
raise exception.InvalidVolumeType(reason=msg % name)
self._check_volume_type_correctness(vol_type)
# if size field present - override disk size specified in DB
size = int(
node.get('size', vol_type['extra_specs'].get('drive_size')))
if shared:
part_size = FLAGS.vsa_part_size_gb
total_capacity = num_disks * size
num_volumes = total_capacity / part_size
size = part_size
else:
num_volumes = num_disks
size = 0 # special handling for full drives
for i in range(num_volumes):
volume_name = "drive-%03d" % first_index
first_index += 1
volume_desc = 'BE volume for VSA %s type %s' % (vsa_name, name)
volume = {
'size': size,
'name': volume_name,
'description': volume_desc,
'volume_type_id': vol_type['id'],
}
volume_params.append(volume)
return volume_params
def destroy(context, name):
"""Marks volume types as deleted."""
if name is None:
msg = _("name cannot be None")
raise exception.InvalidVolumeType(reason=msg)
else:
db.volume_type_destroy(context, name)
def get_volume_type_by_name(context, name):
"""Retrieves single volume type by name."""
if name is None:
msg = _("name cannot be None")
raise exception.InvalidVolumeType(reason=msg)
return db.volume_type_get_by_name(context, name)
def _check_volume_type_correctness(self, vol_type):
if (vol_type.get('extra_specs') is None
or vol_type['extra_specs'].get('type') != 'vsa_drive'
or vol_type['extra_specs'].get('drive_type') is None
or vol_type['extra_specs'].get('drive_size') is None):
msg = _("invalid drive data")
raise exception.InvalidVolumeType(reason=msg)
def get_volume_type_by_name(context, name):
"""Retrieves single volume type by name."""
if name is None:
raise exception.InvalidVolumeType(volume_type=name)
try:
return db.volume_type_get_by_name(context, name)
except exception.DBError:
raise exception.ApiError(_("Unknown volume type: %s") % name)
def get_volume_type(ctxt, id):
"""Retrieves single volume type by id."""
if id is None:
msg = _("id cannot be None")
raise exception.InvalidVolumeType(reason=msg)
if ctxt is None:
ctxt = context.get_admin_context()
return db.volume_type_get(ctxt, id)
def purge(context, name):
"""Removes volume types from database."""
if name is None:
raise exception.InvalidVolumeType(volume_type=name)
else:
try:
db.volume_type_purge(context, name)
except exception.NotFound:
LOG.exception(_('Volume type %s not found for purge') % name)
raise exception.ApiError(_("Unknown volume type: %s") % name)
def destroy(context, name):
"""Marks volume types as deleted."""
if name is None:
raise exception.InvalidVolumeType(volume_type=name)
else:
try:
db.volume_type_destroy(context, name)
except exception.NotFound:
LOG.exception(_('Volume type %s not found for deletion') % name)
raise exception.ApiError(_("Unknown volume type: %s") % name)
def get_volume_type(ctxt, id):
"""Retrieves single volume type by id."""
if id is None:
raise exception.InvalidVolumeType(volume_type=id)
if ctxt is None:
ctxt = context.get_admin_context()
try:
return db.volume_type_get(ctxt, id)
except exception.DBError:
raise exception.ApiError(_("Unknown volume type: %s") % id)
