¡@
OpenStack Study: iscsi.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012 NetApp, Inc. # Copyright (c) 2012 OpenStack Foundation # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. """ Volume driver for NetApp iSCSI storage systems. This driver requires NetApp Clustered Data ONTAP or 7-mode storage systems with installed iSCSI licenses. """ import copy import math import sys import time import uuid from cinder import exception from cinder.openstack.common import excutils from cinder.openstack.common import log as logging from cinder.openstack.common import timeutils from cinder import units from cinder import utils from cinder.volume import driver from cinder.volume.drivers.netapp.api import NaApiError from cinder.volume.drivers.netapp.api import NaElement from cinder.volume.drivers.netapp.api import NaServer from cinder.volume.drivers.netapp.options import netapp_7mode_opts from cinder.volume.drivers.netapp.options import netapp_basicauth_opts from cinder.volume.drivers.netapp.options import netapp_cluster_opts from cinder.volume.drivers.netapp.options import netapp_connection_opts from cinder.volume.drivers.netapp.options import netapp_provisioning_opts from cinder.volume.drivers.netapp.options import netapp_transport_opts from cinder.volume.drivers.netapp import ssc_utils from cinder.volume.drivers.netapp.utils import get_volume_extra_specs from cinder.volume.drivers.netapp.utils import provide_ems from cinder.volume.drivers.netapp.utils import set_safe_attr from cinder.volume.drivers.netapp.utils import validate_instantiation LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class NetAppLun(object): """Represents a LUN on NetApp storage."""
**** CubicPower OpenStack Study **** def __init__(self, handle, name, size, metadata_dict): self.handle = handle self.name = name self.size = size self.metadata = metadata_dict or {}
**** CubicPower OpenStack Study **** def get_metadata_property(self, prop): """Get the metadata property of a LUN.""" if prop in self.metadata: return self.metadata[prop] name = self.name msg = _("No metadata property %(prop)s defined for the" " LUN %(name)s") msg_fmt = {'prop': prop, 'name': name} LOG.debug(msg % msg_fmt)
**** CubicPower OpenStack Study **** def __str__(self, *args, **kwargs): return 'NetApp Lun[handle:%s, name:%s, size:%s, metadata:%s]'\ % (self.handle, self.name, self.size, self.metadata)
**** CubicPower OpenStack Study **** class NetAppDirectISCSIDriver(driver.ISCSIDriver): """NetApp Direct iSCSI volume driver.""" VERSION = "1.0.0" IGROUP_PREFIX = 'openstack-' required_flags = ['netapp_transport_type', 'netapp_login', 'netapp_password', 'netapp_server_hostname', 'netapp_server_port']
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(NetAppDirectISCSIDriver, self).__init__(*args, **kwargs) validate_instantiation(**kwargs) self.configuration.append_config_values(netapp_connection_opts) self.configuration.append_config_values(netapp_basicauth_opts) self.configuration.append_config_values(netapp_transport_opts) self.configuration.append_config_values(netapp_provisioning_opts) self.lun_table = {}
**** CubicPower OpenStack Study **** def _create_client(self, **kwargs): """Instantiate a client for NetApp server. This method creates NetApp server client for api communication. """ host_filer = kwargs['hostname'] LOG.debug(_('Using NetApp filer: %s') % host_filer) self.client = NaServer(host=host_filer, server_type=NaServer.SERVER_TYPE_FILER, transport_type=kwargs['transport_type'], style=NaServer.STYLE_LOGIN_PASSWORD, username=kwargs['login'], password=kwargs['password'])
**** CubicPower OpenStack Study **** def _do_custom_setup(self): """Does custom setup depending on the type of filer.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _check_flags(self): """Ensure that the flags we care about are set.""" required_flags = self.required_flags for flag in required_flags: if not getattr(self.configuration, flag, None): msg = _('%s is not set') % flag raise exception.InvalidInput(reason=msg)
**** CubicPower OpenStack Study **** def do_setup(self, context): """Setup the NetApp Volume driver. Called one time by the manager after the driver is loaded. Validate the flags we care about and setup NetApp client. """ self._check_flags() self._create_client( transport_type=self.configuration.netapp_transport_type, login=self.configuration.netapp_login, password=self.configuration.netapp_password, hostname=self.configuration.netapp_server_hostname, port=self.configuration.netapp_server_port) self._do_custom_setup()
**** CubicPower OpenStack Study **** def check_for_setup_error(self): """Check that the driver is working and can communicate. Discovers the LUNs on the NetApp server. """ self.lun_table = {} self._get_lun_list() LOG.debug(_("Success getting LUN list from server"))
**** CubicPower OpenStack Study **** def create_volume(self, volume): """Driver entry point for creating a new volume.""" default_size = '104857600' # 100 MB gigabytes = 1073741824L # 2^30 name = volume['name'] if int(volume['size']) == 0: size = default_size else: size = str(int(volume['size']) * gigabytes) metadata = {} metadata['OsType'] = 'linux' metadata['SpaceReserved'] = 'true' extra_specs = get_volume_extra_specs(volume) self._create_lun_on_eligible_vol(name, size, metadata, extra_specs) LOG.debug(_("Created LUN with name %s") % name) handle = self._create_lun_handle(metadata) self._add_lun_to_table(NetAppLun(handle, name, size, metadata))
**** CubicPower OpenStack Study **** def delete_volume(self, volume): """Driver entry point for destroying existing volumes.""" name = volume['name'] metadata = self._get_lun_attr(name, 'metadata') if not metadata: msg = _("No entry in LUN table for volume/snapshot %(name)s.") msg_fmt = {'name': name} LOG.warn(msg % msg_fmt) return self._destroy_lun(metadata['Path']) self.lun_table.pop(name)
**** CubicPower OpenStack Study **** def _destroy_lun(self, path, force=True): """Destroys the lun at the path.""" lun_destroy = NaElement.create_node_with_children( 'lun-destroy', **{'path': path}) if force: lun_destroy.add_new_child('force', 'true') self.client.invoke_successfully(lun_destroy, True) seg = path.split("/") LOG.debug(_("Destroyed LUN %s") % seg[-1])
**** CubicPower OpenStack Study **** def ensure_export(self, context, volume): """Driver entry point to get the export info for an existing volume.""" handle = self._get_lun_attr(volume['name'], 'handle') return {'provider_location': handle}
**** CubicPower OpenStack Study **** def create_export(self, context, volume): """Driver entry point to get the export info for a new volume.""" handle = self._get_lun_attr(volume['name'], 'handle') return {'provider_location': handle}
**** CubicPower OpenStack Study **** def remove_export(self, context, volume): """Driver entry point to remove an export for a volume. Since exporting is idempotent in this driver, we have nothing to do for unexporting. """ pass
**** CubicPower OpenStack Study **** def initialize_connection(self, volume, connector): """Driver entry point to attach a volume to an instance. Do the LUN masking on the storage system so the initiator can access the LUN on the target. Also return the iSCSI properties so the initiator can find the LUN. This implementation does not call _get_iscsi_properties() to get the properties because cannot store the LUN number in the database. We only find out what the LUN number will be during this method call so we construct the properties dictionary ourselves. """ initiator_name = connector['initiator'] name = volume['name'] lun_id = self._map_lun(name, initiator_name, 'iscsi', None) msg = _("Mapped LUN %(name)s to the initiator %(initiator_name)s") msg_fmt = {'name': name, 'initiator_name': initiator_name} LOG.debug(msg % msg_fmt) iqn = self._get_iscsi_service_details() target_details_list = self._get_target_details() msg = _("Successfully fetched target details for LUN %(name)s and " "initiator %(initiator_name)s") msg_fmt = {'name': name, 'initiator_name': initiator_name} LOG.debug(msg % msg_fmt) if not target_details_list: msg = _('Failed to get LUN target details for the LUN %s') raise exception.VolumeBackendAPIException(data=msg % name) target_details = None for tgt_detail in target_details_list: if tgt_detail.get('interface-enabled', 'true') == 'true': target_details = tgt_detail break if not target_details: target_details = target_details_list[0] if not target_details['address'] and target_details['port']: msg = _('Failed to get target portal for the LUN %s') raise exception.VolumeBackendAPIException(data=msg % name) if not iqn: msg = _('Failed to get target IQN for the LUN %s') raise exception.VolumeBackendAPIException(data=msg % name) properties = {} properties['target_discovered'] = False (address, port) = (target_details['address'], target_details['port']) properties['target_portal'] = '%s:%s' % (address, port) properties['target_iqn'] = iqn properties['target_lun'] = lun_id properties['volume_id'] = volume['id'] auth = volume['provider_auth'] if auth: (auth_method, auth_username, auth_secret) = auth.split() properties['auth_method'] = auth_method properties['auth_username'] = auth_username properties['auth_password'] = auth_secret return { 'driver_volume_type': 'iscsi', 'data': properties, }
**** CubicPower OpenStack Study **** def create_snapshot(self, snapshot): """Driver entry point for creating a snapshot. This driver implements snapshots by using efficient single-file (LUN) cloning. """ vol_name = snapshot['volume_name'] snapshot_name = snapshot['name'] lun = self.lun_table[vol_name] self._clone_lun(lun.name, snapshot_name, 'false')
**** CubicPower OpenStack Study **** def delete_snapshot(self, snapshot): """Driver entry point for deleting a snapshot.""" self.delete_volume(snapshot) LOG.debug(_("Snapshot %s deletion successful") % snapshot['name'])
**** CubicPower OpenStack Study **** def create_volume_from_snapshot(self, volume, snapshot): """Driver entry point for creating a new volume from a snapshot. Many would call this "cloning" and in fact we use cloning to implement this feature. """ vol_size = volume['size'] snap_size = snapshot['volume_size'] snapshot_name = snapshot['name'] new_name = volume['name'] self._clone_lun(snapshot_name, new_name, 'true') if vol_size != snap_size: try: self.extend_volume(volume, volume['size']) except Exception: with excutils.save_and_reraise_exception(): LOG.error( _("Resizing %s failed. Cleaning volume."), new_name) self.delete_volume(volume)
**** CubicPower OpenStack Study **** def terminate_connection(self, volume, connector, **kwargs): """Driver entry point to unattach a volume from an instance. Unmask the LUN on the storage system so the given initiator can no longer access it. """ initiator_name = connector['initiator'] name = volume['name'] metadata = self._get_lun_attr(name, 'metadata') path = metadata['Path'] self._unmap_lun(path, initiator_name) msg = _("Unmapped LUN %(name)s from the initiator " "%(initiator_name)s") msg_fmt = {'name': name, 'initiator_name': initiator_name} LOG.debug(msg % msg_fmt)
**** CubicPower OpenStack Study **** def _get_ontapi_version(self): """Gets the supported ontapi version.""" ontapi_version = NaElement('system-get-ontapi-version') res = self.client.invoke_successfully(ontapi_version, False) major = res.get_child_content('major-version') minor = res.get_child_content('minor-version') return (major, minor)
**** CubicPower OpenStack Study **** def _create_lun_on_eligible_vol(self, name, size, metadata, extra_specs=None): """Creates an actual lun on filer.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def create_lun(self, volume, lun, size, metadata, qos_policy_group=None): """Issues api request for creating lun on volume.""" path = '/vol/%s/%s' % (volume, lun) lun_create = NaElement.create_node_with_children( 'lun-create-by-size', **{'path': path, 'size': size, 'ostype': metadata['OsType'], 'space-reservation-enabled': metadata['SpaceReserved']}) if qos_policy_group: lun_create.add_new_child('qos-policy-group', qos_policy_group) self.client.invoke_successfully(lun_create, True)
**** CubicPower OpenStack Study **** def _get_iscsi_service_details(self): """Returns iscsi iqn.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _get_target_details(self): """Gets the target portal details.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _create_lun_handle(self, metadata): """Returns lun handle based on filer type.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _get_lun_list(self): """Gets the list of luns on filer.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _extract_and_populate_luns(self, api_luns): """Extracts the luns from api. Populates in the lun table. """ for lun in api_luns: meta_dict = self._create_lun_meta(lun) path = lun.get_child_content('path') (rest, splitter, name) = path.rpartition('/') handle = self._create_lun_handle(meta_dict) size = lun.get_child_content('size') discovered_lun = NetAppLun(handle, name, size, meta_dict) self._add_lun_to_table(discovered_lun)
**** CubicPower OpenStack Study **** def _is_naelement(self, elem): """Checks if element is NetApp element.""" if not isinstance(elem, NaElement): raise ValueError('Expects NaElement')
**** CubicPower OpenStack Study **** def _map_lun(self, name, initiator, initiator_type='iscsi', lun_id=None): """Maps lun to the initiator and returns lun id assigned.""" metadata = self._get_lun_attr(name, 'metadata') os = metadata['OsType'] path = metadata['Path'] if self._check_allowed_os(os): os = os else: os = 'default' igroup_name = self._get_or_create_igroup(initiator, initiator_type, os) lun_map = NaElement.create_node_with_children( 'lun-map', **{'path': path, 'initiator-group': igroup_name}) if lun_id: lun_map.add_new_child('lun-id', lun_id) try: result = self.client.invoke_successfully(lun_map, True) return result.get_child_content('lun-id-assigned') except NaApiError as e: code = e.code message = e.message msg = _('Error mapping lun. Code :%(code)s, Message:%(message)s') msg_fmt = {'code': code, 'message': message} exc_info = sys.exc_info() LOG.warn(msg % msg_fmt) (igroup, lun_id) = self._find_mapped_lun_igroup(path, initiator) if lun_id is not None: return lun_id else: raise exc_info[0], exc_info[1], exc_info[2]
**** CubicPower OpenStack Study **** def _unmap_lun(self, path, initiator): """Unmaps a lun from given initiator.""" (igroup_name, lun_id) = self._find_mapped_lun_igroup(path, initiator) lun_unmap = NaElement.create_node_with_children( 'lun-unmap', **{'path': path, 'initiator-group': igroup_name}) try: self.client.invoke_successfully(lun_unmap, True) except NaApiError as e: msg = _("Error unmapping lun. Code :%(code)s," " Message:%(message)s") msg_fmt = {'code': e.code, 'message': e.message} exc_info = sys.exc_info() LOG.warn(msg % msg_fmt) # if the lun is already unmapped if e.code == '13115' or e.code == '9016': pass else: raise exc_info[0], exc_info[1], exc_info[2]
**** CubicPower OpenStack Study **** def _find_mapped_lun_igroup(self, path, initiator, os=None): """Find the igroup for mapped lun with initiator.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _get_or_create_igroup(self, initiator, initiator_type='iscsi', os='default'): """Checks for an igroup for an initiator. Creates igroup if not found. """ igroups = self._get_igroup_by_initiator(initiator=initiator) igroup_name = None for igroup in igroups: if igroup['initiator-group-os-type'] == os: if igroup['initiator-group-type'] == initiator_type or \ igroup['initiator-group-type'] == 'mixed': if igroup['initiator-group-name'].startswith( self.IGROUP_PREFIX): igroup_name = igroup['initiator-group-name'] break if not igroup_name: igroup_name = self.IGROUP_PREFIX + str(uuid.uuid4()) self._create_igroup(igroup_name, initiator_type, os) self._add_igroup_initiator(igroup_name, initiator) return igroup_name
**** CubicPower OpenStack Study **** def _get_igroup_by_initiator(self, initiator): """Get igroups by initiator.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _check_allowed_os(self, os): """Checks if the os type supplied is NetApp supported.""" if os in ['linux', 'aix', 'hpux', 'windows', 'solaris', 'netware', 'vmware', 'openvms', 'xen', 'hyper_v']: return True else: return False
**** CubicPower OpenStack Study **** def _create_igroup(self, igroup, igroup_type='iscsi', os_type='default'): """Creates igroup with specified args.""" igroup_create = NaElement.create_node_with_children( 'igroup-create', **{'initiator-group-name': igroup, 'initiator-group-type': igroup_type, 'os-type': os_type}) self.client.invoke_successfully(igroup_create, True)
**** CubicPower OpenStack Study **** def _add_igroup_initiator(self, igroup, initiator): """Adds initiators to the specified igroup.""" igroup_add = NaElement.create_node_with_children( 'igroup-add', **{'initiator-group-name': igroup, 'initiator': initiator}) self.client.invoke_successfully(igroup_add, True)
**** CubicPower OpenStack Study **** def _add_lun_to_table(self, lun): """Adds LUN to cache table.""" if not isinstance(lun, NetAppLun): msg = _("Object is not a NetApp LUN.") raise exception.VolumeBackendAPIException(data=msg) self.lun_table[lun.name] = lun
**** CubicPower OpenStack Study **** def _get_lun_from_table(self, name): """Gets LUN from cache table. Refreshes cache if lun not found in cache. """ lun = self.lun_table.get(name) if lun is None: self._get_lun_list() lun = self.lun_table.get(name) if lun is None: raise exception.VolumeNotFound(volume_id=name) return lun
**** CubicPower OpenStack Study **** def _clone_lun(self, name, new_name, space_reserved='true', src_block=0, dest_block=0, block_count=0): """Clone LUN with the given name to the new name.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _get_lun_by_args(self, **args): """Retrieves luns with specified args.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def _get_lun_attr(self, name, attr): """Get the lun attribute if found else None.""" try: attr = getattr(self._get_lun_from_table(name), attr) return attr except exception.VolumeNotFound as e: LOG.error(_("Message: %s"), e.msg) except Exception as e: LOG.error(_("Error getting lun attribute. Exception: %s"), e.__str__()) return None
**** CubicPower OpenStack Study **** def _create_lun_meta(self, lun): raise NotImplementedError()
**** CubicPower OpenStack Study **** def create_cloned_volume(self, volume, src_vref): """Creates a clone of the specified volume.""" vol_size = volume['size'] src_vol = self.lun_table[src_vref['name']] src_vol_size = src_vref['size'] new_name = volume['name'] self._clone_lun(src_vol.name, new_name, 'true') if vol_size != src_vol_size: try: self.extend_volume(volume, volume['size']) except Exception: with excutils.save_and_reraise_exception(): LOG.error( _("Resizing %s failed. Cleaning volume."), new_name) self.delete_volume(volume)
**** CubicPower OpenStack Study **** def get_volume_stats(self, refresh=False): """Get volume stats. If 'refresh' is True, run update the stats first. """ if refresh: self._update_volume_stats() return self._stats
**** CubicPower OpenStack Study **** def _update_volume_stats(self): """Retrieve stats info from volume group.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def extend_volume(self, volume, new_size): """Extend an existing volume to the new size.""" name = volume['name'] path = self.lun_table[name].metadata['Path'] curr_size_bytes = str(self.lun_table[name].size) new_size_bytes = str(int(new_size) * units.GiB) # Reused by clone scenarios. # Hence comparing the stored size. if curr_size_bytes != new_size_bytes: lun_geometry = self._get_lun_geometry(path) if (lun_geometry and lun_geometry.get("max_resize") and int(lun_geometry.get("max_resize")) >= int(new_size_bytes)): self._do_direct_resize(path, new_size_bytes) else: self._do_sub_clone_resize(path, new_size_bytes) self.lun_table[name].size = new_size_bytes else: LOG.info(_("No need to extend volume %s" " as it is already the requested new size."), name)
**** CubicPower OpenStack Study **** def _do_direct_resize(self, path, new_size_bytes, force=True): """Uses the resize api to resize the lun.""" seg = path.split("/") LOG.info(_("Resizing lun %s directly to new size."), seg[-1]) lun_resize = NaElement("lun-resize") lun_resize.add_new_child('path', path) lun_resize.add_new_child('size', new_size_bytes) if force: lun_resize.add_new_child('force', 'true') self.client.invoke_successfully(lun_resize, True)
**** CubicPower OpenStack Study **** def _get_lun_geometry(self, path): """Gets the lun geometry.""" geometry = {} lun_geo = NaElement("lun-get-geometry") lun_geo.add_new_child('path', path) try: result = self.client.invoke_successfully(lun_geo, True) geometry['size'] = result.get_child_content("size") geometry['bytes_per_sector'] =\ result.get_child_content("bytes-per-sector") geometry['sectors_per_track'] =\ result.get_child_content("sectors-per-track") geometry['tracks_per_cylinder'] =\ result.get_child_content("tracks-per-cylinder") geometry['cylinders'] =\ result.get_child_content("cylinders") geometry['max_resize'] =\ result.get_child_content("max-resize-size") except Exception as e: LOG.error(_("Lun %(path)s geometry failed. Message - %(msg)s") % {'path': path, 'msg': e.message}) return geometry
**** CubicPower OpenStack Study **** def _get_volume_options(self, volume_name): """Get the value for the volume option.""" opts = [] vol_option_list = NaElement("volume-options-list-info") vol_option_list.add_new_child('volume', volume_name) result = self.client.invoke_successfully(vol_option_list, True) options = result.get_child_by_name("options") if options: opts = options.get_children() return opts
**** CubicPower OpenStack Study **** def _get_vol_option(self, volume_name, option_name): """Get the value for the volume option.""" value = None options = self._get_volume_options(volume_name) for opt in options: if opt.get_child_content('name') == option_name: value = opt.get_child_content('value') break return value
**** CubicPower OpenStack Study **** def _move_lun(self, path, new_path): """Moves the lun at path to new path.""" seg = path.split("/") new_seg = new_path.split("/") LOG.debug(_("Moving lun %(name)s to %(new_name)s.") % {'name': seg[-1], 'new_name': new_seg[-1]}) lun_move = NaElement("lun-move") lun_move.add_new_child("path", path) lun_move.add_new_child("new-path", new_path) self.client.invoke_successfully(lun_move, True)
**** CubicPower OpenStack Study **** def _do_sub_clone_resize(self, path, new_size_bytes): """Does sub lun clone after verification. Clones the block ranges and swaps the luns also deletes older lun after a successful clone. """ seg = path.split("/") LOG.info(_("Resizing lun %s using sub clone to new size."), seg[-1]) name = seg[-1] vol_name = seg[2] lun = self.lun_table[name] metadata = lun.metadata compression = self._get_vol_option(vol_name, 'compression') if compression == "on": msg = _('%s cannot be sub clone resized' ' as it is hosted on compressed volume') raise exception.VolumeBackendAPIException(data=msg % name) else: block_count = self._get_lun_block_count(path) if block_count == 0: msg = _('%s cannot be sub clone resized' ' as it contains no blocks.') raise exception.VolumeBackendAPIException(data=msg % name) new_lun = 'new-%s' % (name) self.create_lun(vol_name, new_lun, new_size_bytes, metadata) try: self._clone_lun(name, new_lun, block_count=block_count) self._post_sub_clone_resize(path) except Exception: with excutils.save_and_reraise_exception(): new_path = '/vol/%s/%s' % (vol_name, new_lun) self._destroy_lun(new_path)
**** CubicPower OpenStack Study **** def _post_sub_clone_resize(self, path): """Try post sub clone resize in a transactional manner.""" st_tm_mv, st_nw_mv, st_del_old = None, None, None seg = path.split("/") LOG.info(_("Post clone resize lun %s"), seg[-1]) new_lun = 'new-%s' % (seg[-1]) tmp_lun = 'tmp-%s' % (seg[-1]) tmp_path = "/vol/%s/%s" % (seg[2], tmp_lun) new_path = "/vol/%s/%s" % (seg[2], new_lun) try: st_tm_mv = self._move_lun(path, tmp_path) st_nw_mv = self._move_lun(new_path, path) st_del_old = self._destroy_lun(tmp_path) except Exception as e: if st_tm_mv is None: msg = _("Failure staging lun %s to tmp.") raise exception.VolumeBackendAPIException(data=msg % (seg[-1])) else: if st_nw_mv is None: self._move_lun(tmp_path, path) msg = _("Failure moving new cloned lun to %s.") raise exception.VolumeBackendAPIException( data=msg % (seg[-1])) elif st_del_old is None: LOG.error(_("Failure deleting staged tmp lun %s."), tmp_lun) else: LOG.error(_("Unknown exception in" " post clone resize lun %s."), seg[-1]) LOG.error(_("Exception details: %s") % (e.__str__()))
**** CubicPower OpenStack Study **** def _get_lun_block_count(self, path): """Gets block counts for the lun.""" LOG.debug(_("Getting lun block count.")) block_count = 0 lun_infos = self._get_lun_by_args(path=path) if not lun_infos: seg = path.split('/') msg = _('Failure getting lun info for %s.') raise exception.VolumeBackendAPIException(data=msg % seg[-1]) lun_info = lun_infos[-1] bs = int(lun_info.get_child_content('block-size')) ls = int(lun_info.get_child_content('size')) block_count = ls / bs return block_count
**** CubicPower OpenStack Study **** class NetAppDirectCmodeISCSIDriver(NetAppDirectISCSIDriver): """NetApp C-mode iSCSI volume driver.""" DEFAULT_VS = 'openstack'
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(NetAppDirectCmodeISCSIDriver, self).__init__(*args, **kwargs) self.configuration.append_config_values(netapp_cluster_opts)
**** CubicPower OpenStack Study **** def _do_custom_setup(self): """Does custom setup for ontap cluster.""" self.vserver = self.configuration.netapp_vserver self.vserver = self.vserver if self.vserver else self.DEFAULT_VS # We set vserver in client permanently. # To use tunneling enable_tunneling while invoking api self.client.set_vserver(self.vserver) # Default values to run first api self.client.set_api_version(1, 15) (major, minor) = self._get_ontapi_version() self.client.set_api_version(major, minor) self.ssc_vols = None self.stale_vols = set()
**** CubicPower OpenStack Study **** def check_for_setup_error(self): """Check that the driver is working and can communicate.""" ssc_utils.check_ssc_api_permissions(self.client) super(NetAppDirectCmodeISCSIDriver, self).check_for_setup_error()
**** CubicPower OpenStack Study **** def _create_lun_on_eligible_vol(self, name, size, metadata, extra_specs=None): """Creates an actual lun on filer.""" req_size = float(size) *\ float(self.configuration.netapp_size_multiplier) qos_policy_group = None if extra_specs: qos_policy_group = extra_specs.pop('netapp:qos_policy_group', None) volumes = self._get_avl_volumes(req_size, extra_specs) if not volumes: msg = _('Failed to get vol with required' ' size and extra specs for volume: %s') raise exception.VolumeBackendAPIException(data=msg % name) for volume in volumes: try: self.create_lun(volume.id['name'], name, size, metadata, qos_policy_group=qos_policy_group) metadata['Path'] = '/vol/%s/%s' % (volume.id['name'], name) metadata['Volume'] = volume.id['name'] metadata['Qtree'] = None return except NaApiError as ex: msg = _("Error provisioning vol %(name)s on " "%(volume)s. Details: %(ex)s") LOG.error(msg % {'name': name, 'volume': volume.id['name'], 'ex': ex}) finally: self._update_stale_vols(volume=volume)
**** CubicPower OpenStack Study **** def _get_avl_volumes(self, size, extra_specs=None): """Get the available volume by size, extra_specs.""" result = [] volumes = ssc_utils.get_volumes_for_specs( self.ssc_vols, extra_specs) if volumes: sorted_vols = sorted(volumes, reverse=True) for vol in sorted_vols: if int(vol.space['size_avl_bytes']) >= int(size): result.append(vol) return result
**** CubicPower OpenStack Study **** def _get_target_details(self): """Gets the target portal details.""" iscsi_if_iter = NaElement('iscsi-interface-get-iter') result = self.client.invoke_successfully(iscsi_if_iter, True) tgt_list = [] if result.get_child_content('num-records')\ and int(result.get_child_content('num-records')) >= 1: attr_list = result.get_child_by_name('attributes-list') iscsi_if_list = attr_list.get_children() for iscsi_if in iscsi_if_list: d = dict() d['address'] = iscsi_if.get_child_content('ip-address') d['port'] = iscsi_if.get_child_content('ip-port') d['tpgroup-tag'] = iscsi_if.get_child_content('tpgroup-tag') d['interface-enabled'] = iscsi_if.get_child_content( 'is-interface-enabled') tgt_list.append(d) return tgt_list
**** CubicPower OpenStack Study **** def _get_iscsi_service_details(self): """Returns iscsi iqn.""" iscsi_service_iter = NaElement('iscsi-service-get-iter') result = self.client.invoke_successfully(iscsi_service_iter, True) if result.get_child_content('num-records') and\ int(result.get_child_content('num-records')) >= 1: attr_list = result.get_child_by_name('attributes-list') iscsi_service = attr_list.get_child_by_name('iscsi-service-info') return iscsi_service.get_child_content('node-name') LOG.debug(_('No iscsi service found for vserver %s') % (self.vserver)) return None
**** CubicPower OpenStack Study **** def _create_lun_handle(self, metadata): """Returns lun handle based on filer type.""" return '%s:%s' % (self.vserver, metadata['Path'])
**** CubicPower OpenStack Study **** def _get_lun_list(self): """Gets the list of luns on filer. Gets the luns from cluster with vserver. """ tag = None while True: api = NaElement('lun-get-iter') api.add_new_child('max-records', '100') if tag: api.add_new_child('tag', tag, True) lun_info = NaElement('lun-info') lun_info.add_new_child('vserver', self.vserver) query = NaElement('query') query.add_child_elem(lun_info) api.add_child_elem(query) result = self.client.invoke_successfully(api) if result.get_child_by_name('num-records') and\ int(result.get_child_content('num-records')) >= 1: attr_list = result.get_child_by_name('attributes-list') self._extract_and_populate_luns(attr_list.get_children()) tag = result.get_child_content('next-tag') if tag is None: break
**** CubicPower OpenStack Study **** def _find_mapped_lun_igroup(self, path, initiator, os=None): """Find the igroup for mapped lun with initiator.""" initiator_igroups = self._get_igroup_by_initiator(initiator=initiator) lun_maps = self._get_lun_map(path) if initiator_igroups and lun_maps: for igroup in initiator_igroups: igroup_name = igroup['initiator-group-name'] if igroup_name.startswith(self.IGROUP_PREFIX): for lun_map in lun_maps: if lun_map['initiator-group'] == igroup_name: return (igroup_name, lun_map['lun-id']) return (None, None)
**** CubicPower OpenStack Study **** def _get_lun_map(self, path): """Gets the lun map by lun path.""" tag = None map_list = [] while True: lun_map_iter = NaElement('lun-map-get-iter') lun_map_iter.add_new_child('max-records', '100') if tag: lun_map_iter.add_new_child('tag', tag, True) query = NaElement('query') lun_map_iter.add_child_elem(query) query.add_node_with_children('lun-map-info', **{'path': path}) result = self.client.invoke_successfully(lun_map_iter, True) tag = result.get_child_content('next-tag') if result.get_child_content('num-records') and \ int(result.get_child_content('num-records')) >= 1: attr_list = result.get_child_by_name('attributes-list') lun_maps = attr_list.get_children() for lun_map in lun_maps: lun_m = dict() lun_m['initiator-group'] = lun_map.get_child_content( 'initiator-group') lun_m['lun-id'] = lun_map.get_child_content('lun-id') lun_m['vserver'] = lun_map.get_child_content('vserver') map_list.append(lun_m) if tag is None: break return map_list
**** CubicPower OpenStack Study **** def _get_igroup_by_initiator(self, initiator): """Get igroups by initiator.""" tag = None igroup_list = [] while True: igroup_iter = NaElement('igroup-get-iter') igroup_iter.add_new_child('max-records', '100') if tag: igroup_iter.add_new_child('tag', tag, True) query = NaElement('query') igroup_iter.add_child_elem(query) igroup_info = NaElement('initiator-group-info') query.add_child_elem(igroup_info) igroup_info.add_new_child('vserver', self.vserver) initiators = NaElement('initiators') igroup_info.add_child_elem(initiators) initiators.add_node_with_children('initiator-info', **{'initiator-name': initiator}) des_attrs = NaElement('desired-attributes') des_ig_info = NaElement('initiator-group-info') des_attrs.add_child_elem(des_ig_info) des_ig_info.add_node_with_children('initiators', **{'initiator-info': None}) des_ig_info.add_new_child('vserver', None) des_ig_info.add_new_child('initiator-group-name', None) des_ig_info.add_new_child('initiator-group-type', None) des_ig_info.add_new_child('initiator-group-os-type', None) igroup_iter.add_child_elem(des_attrs) result = self.client.invoke_successfully(igroup_iter, False) tag = result.get_child_content('next-tag') if result.get_child_content('num-records') and\ int(result.get_child_content('num-records')) > 0: attr_list = result.get_child_by_name('attributes-list') igroups = attr_list.get_children() for igroup in igroups: ig = dict() ig['initiator-group-os-type'] = igroup.get_child_content( 'initiator-group-os-type') ig['initiator-group-type'] = igroup.get_child_content( 'initiator-group-type') ig['initiator-group-name'] = igroup.get_child_content( 'initiator-group-name') igroup_list.append(ig) if tag is None: break return igroup_list
**** CubicPower OpenStack Study **** def _clone_lun(self, name, new_name, space_reserved='true', src_block=0, dest_block=0, block_count=0): """Clone LUN with the given handle to the new name.""" metadata = self._get_lun_attr(name, 'metadata') volume = metadata['Volume'] # zAPI can only handle 2^24 blocks per range bc_limit = 2 ** 24 # 8GB # zAPI can only handle 32 block ranges per call br_limit = 32 z_limit = br_limit * bc_limit # 256 GB z_calls = int(math.ceil(block_count / float(z_limit))) zbc = block_count if z_calls == 0: z_calls = 1 for call in range(0, z_calls): if zbc > z_limit: block_count = z_limit zbc -= z_limit else: block_count = zbc clone_create = NaElement.create_node_with_children( 'clone-create', **{'volume': volume, 'source-path': name, 'destination-path': new_name, 'space-reserve': space_reserved}) if block_count > 0: block_ranges = NaElement("block-ranges") segments = int(math.ceil(block_count / float(bc_limit))) bc = block_count for segment in range(0, segments): if bc > bc_limit: block_count = bc_limit bc -= bc_limit else: block_count = bc block_range = NaElement.create_node_with_children( 'block-range', **{'source-block-number': str(src_block), 'destination-block-number': str(dest_block), 'block-count': str(block_count)}) block_ranges.add_child_elem(block_range) src_block += int(block_count) dest_block += int(block_count) clone_create.add_child_elem(block_ranges) self.client.invoke_successfully(clone_create, True) LOG.debug(_("Cloned LUN with new name %s") % new_name) lun = self._get_lun_by_args(vserver=self.vserver, path='/vol/%s/%s' % (volume, new_name)) if len(lun) == 0: msg = _("No cloned lun named %s found on the filer") raise exception.VolumeBackendAPIException(data=msg % (new_name)) clone_meta = self._create_lun_meta(lun[0]) self._add_lun_to_table(NetAppLun('%s:%s' % (clone_meta['Vserver'], clone_meta['Path']), new_name, lun[0].get_child_content('size'), clone_meta)) self._update_stale_vols( volume=ssc_utils.NetAppVolume(volume, self.vserver))
**** CubicPower OpenStack Study **** def _get_lun_by_args(self, **args): """Retrieves lun with specified args.""" lun_iter = NaElement('lun-get-iter') lun_iter.add_new_child('max-records', '100') query = NaElement('query') lun_iter.add_child_elem(query) query.add_node_with_children('lun-info', **args) luns = self.client.invoke_successfully(lun_iter) attr_list = luns.get_child_by_name('attributes-list') return attr_list.get_children()
**** CubicPower OpenStack Study **** def _create_lun_meta(self, lun): """Creates lun metadata dictionary.""" self._is_naelement(lun) meta_dict = {} self._is_naelement(lun) meta_dict['Vserver'] = lun.get_child_content('vserver') meta_dict['Volume'] = lun.get_child_content('volume') meta_dict['Qtree'] = lun.get_child_content('qtree') meta_dict['Path'] = lun.get_child_content('path') meta_dict['OsType'] = lun.get_child_content('multiprotocol-type') meta_dict['SpaceReserved'] = \ lun.get_child_content('is-space-reservation-enabled') return meta_dict
**** CubicPower OpenStack Study **** def _configure_tunneling(self, do_tunneling=False): """Configures tunneling for ontap cluster.""" if do_tunneling: self.client.set_vserver(self.vserver) else: self.client.set_vserver(None)
**** CubicPower OpenStack Study **** def _update_volume_stats(self): """Retrieve stats info from volume group.""" LOG.debug(_("Updating volume stats")) data = {} netapp_backend = 'NetApp_iSCSI_Cluster_direct' backend_name = self.configuration.safe_get('volume_backend_name') data["volume_backend_name"] = ( backend_name or netapp_backend) data["vendor_name"] = 'NetApp' data["driver_version"] = '1.0' data["storage_protocol"] = 'iSCSI' data['total_capacity_gb'] = 0 data['free_capacity_gb'] = 0 data['reserved_percentage'] = 0 data['QoS_support'] = False self._update_cluster_vol_stats(data) provide_ems(self, self.client, data, netapp_backend) self._stats = data
**** CubicPower OpenStack Study **** def _update_cluster_vol_stats(self, data): """Updates vol stats with cluster config.""" sync = True if self.ssc_vols is None else False ssc_utils.refresh_cluster_ssc(self, self.client, self.vserver, synchronous=sync) if self.ssc_vols: data['netapp_mirrored'] = 'true'\ if self.ssc_vols['mirrored'] else 'false' data['netapp_unmirrored'] = 'true'\ if len(self.ssc_vols['all']) > len(self.ssc_vols['mirrored'])\ else 'false' data['netapp_dedup'] = 'true'\ if self.ssc_vols['dedup'] else 'false' data['netapp_nodedup'] = 'true'\ if len(self.ssc_vols['all']) > len(self.ssc_vols['dedup'])\ else 'false' data['netapp_compression'] = 'true'\ if self.ssc_vols['compression'] else 'false' data['netapp_nocompression'] = 'true'\ if len(self.ssc_vols['all']) >\ len(self.ssc_vols['compression'])\ else 'false' data['netapp_thin_provisioned'] = 'true'\ if self.ssc_vols['thin'] else 'false' data['netapp_thick_provisioned'] = 'true'\ if len(self.ssc_vols['all']) >\ len(self.ssc_vols['thin']) else 'false' if self.ssc_vols['all']: vol_max = max(self.ssc_vols['all']) data['total_capacity_gb'] =\ int(vol_max.space['size_total_bytes']) / units.GiB data['free_capacity_gb'] =\ int(vol_max.space['size_avl_bytes']) / units.GiB else: data['total_capacity_gb'] = 0 data['free_capacity_gb'] = 0 else: LOG.warn(_("Cluster ssc is not updated. No volume stats found.")) @utils.synchronized('update_stale')
**** CubicPower OpenStack Study **** def _update_stale_vols(self, volume=None, reset=False): """Populates stale vols with vol and returns set copy if reset.""" if volume: self.stale_vols.add(volume) if reset: set_copy = copy.deepcopy(self.stale_vols) self.stale_vols.clear() return set_copy @utils.synchronized("refresh_ssc_vols")
**** CubicPower OpenStack Study **** def refresh_ssc_vols(self, vols): """Refreshes ssc_vols with latest entries.""" self.ssc_vols = vols
**** CubicPower OpenStack Study **** def delete_volume(self, volume): """Driver entry point for destroying existing volumes.""" lun = self.lun_table.get(volume['name']) netapp_vol = None if lun: netapp_vol = lun.get_metadata_property('Volume') super(NetAppDirectCmodeISCSIDriver, self).delete_volume(volume) if netapp_vol: self._update_stale_vols( volume=ssc_utils.NetAppVolume(netapp_vol, self.vserver))
**** CubicPower OpenStack Study **** class NetAppDirect7modeISCSIDriver(NetAppDirectISCSIDriver): """NetApp 7-mode iSCSI volume driver."""
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): super(NetAppDirect7modeISCSIDriver, self).__init__(*args, **kwargs) self.configuration.append_config_values(netapp_7mode_opts)
**** CubicPower OpenStack Study **** def _do_custom_setup(self): """Does custom setup depending on the type of filer.""" self.vfiler = self.configuration.netapp_vfiler self.volume_list = self.configuration.netapp_volume_list if self.volume_list: self.volume_list = self.volume_list.split(',') self.volume_list = [el.strip() for el in self.volume_list] (major, minor) = self._get_ontapi_version() self.client.set_api_version(major, minor) if self.vfiler: self.client.set_vfiler(self.vfiler) self.vol_refresh_time = None self.vol_refresh_interval = 1800 self.vol_refresh_running = False self.vol_refresh_voluntary = False # Setting it infinite at set up # This will not rule out backend from scheduling self.total_gb = 'infinite' self.free_gb = 'infinite'
**** CubicPower OpenStack Study **** def check_for_setup_error(self): """Check that the driver is working and can communicate.""" api_version = self.client.get_api_version() if api_version: major, minor = api_version if major == 1 and minor < 9: msg = _("Unsupported ONTAP version." " ONTAP version 7.3.1 and above is supported.") raise exception.VolumeBackendAPIException(data=msg) else: msg = _("Api version could not be determined.") raise exception.VolumeBackendAPIException(data=msg) super(NetAppDirect7modeISCSIDriver, self).check_for_setup_error()
**** CubicPower OpenStack Study **** def _create_lun_on_eligible_vol(self, name, size, metadata, extra_specs=None): """Creates an actual lun on filer.""" req_size = float(size) *\ float(self.configuration.netapp_size_multiplier) volume = self._get_avl_volume_by_size(req_size) if not volume: msg = _('Failed to get vol with required size for volume: %s') raise exception.VolumeBackendAPIException(data=msg % name) self.create_lun(volume['name'], name, size, metadata) metadata['Path'] = '/vol/%s/%s' % (volume['name'], name) metadata['Volume'] = volume['name'] metadata['Qtree'] = None self.vol_refresh_voluntary = True
**** CubicPower OpenStack Study **** def _get_filer_volumes(self, volume=None): """Returns list of filer volumes in api format.""" vol_request = NaElement('volume-list-info') if volume: vol_request.add_new_child('volume', volume) res = self.client.invoke_successfully(vol_request, True) volumes = res.get_child_by_name('volumes') if volumes: return volumes.get_children() return []
**** CubicPower OpenStack Study **** def _get_avl_volume_by_size(self, size): """Get the available volume by size.""" vols = self._get_filer_volumes() for vol in vols: avl_size = vol.get_child_content('size-available') state = vol.get_child_content('state') if float(avl_size) >= float(size) and state == 'online': avl_vol = dict() avl_vol['name'] = vol.get_child_content('name') avl_vol['block-type'] = vol.get_child_content('block-type') avl_vol['type'] = vol.get_child_content('type') avl_vol['size-available'] = avl_size if self.volume_list: if avl_vol['name'] in self.volume_list: return avl_vol elif self._get_vol_option(avl_vol['name'], 'root') != 'true': return avl_vol return None
**** CubicPower OpenStack Study **** def _get_igroup_by_initiator(self, initiator): """Get igroups by initiator.""" igroup_list = NaElement('igroup-list-info') result = self.client.invoke_successfully(igroup_list, True) igroups = [] igs = result.get_child_by_name('initiator-groups') if igs: ig_infos = igs.get_children() if ig_infos: for info in ig_infos: initiators = info.get_child_by_name('initiators') init_infos = initiators.get_children() if init_infos: for init in init_infos: if init.get_child_content('initiator-name')\ == initiator: d = dict() d['initiator-group-os-type'] = \ info.get_child_content( 'initiator-group-os-type') d['initiator-group-type'] = \ info.get_child_content( 'initiator-group-type') d['initiator-group-name'] = \ info.get_child_content( 'initiator-group-name') igroups.append(d) return igroups
**** CubicPower OpenStack Study **** def _get_target_details(self): """Gets the target portal details.""" iscsi_if_iter = NaElement('iscsi-portal-list-info') result = self.client.invoke_successfully(iscsi_if_iter, True) tgt_list = [] portal_list_entries = result.get_child_by_name( 'iscsi-portal-list-entries') if portal_list_entries: portal_list = portal_list_entries.get_children() for iscsi_if in portal_list: d = dict() d['address'] = iscsi_if.get_child_content('ip-address') d['port'] = iscsi_if.get_child_content('ip-port') d['tpgroup-tag'] = iscsi_if.get_child_content('tpgroup-tag') tgt_list.append(d) return tgt_list
**** CubicPower OpenStack Study **** def _get_iscsi_service_details(self): """Returns iscsi iqn.""" iscsi_service_iter = NaElement('iscsi-node-get-name') result = self.client.invoke_successfully(iscsi_service_iter, True) return result.get_child_content('node-name')
**** CubicPower OpenStack Study **** def _create_lun_handle(self, metadata): """Returns lun handle based on filer type.""" if self.vfiler: owner = '%s:%s' % (self.configuration.netapp_server_hostname, self.vfiler) else: owner = self.configuration.netapp_server_hostname return '%s:%s' % (owner, metadata['Path'])
**** CubicPower OpenStack Study **** def _get_lun_list(self): """Gets the list of luns on filer.""" lun_list = [] if self.volume_list: for vol in self.volume_list: try: luns = self._get_vol_luns(vol) if luns: lun_list.extend(luns) except NaApiError: LOG.warn(_("Error finding luns for volume %s." " Verify volume exists.") % (vol)) else: luns = self._get_vol_luns(None) lun_list.extend(luns) self._extract_and_populate_luns(lun_list)
**** CubicPower OpenStack Study **** def _get_vol_luns(self, vol_name): """Gets the luns for a volume.""" api = NaElement('lun-list-info') if vol_name: api.add_new_child('volume-name', vol_name) result = self.client.invoke_successfully(api, True) luns = result.get_child_by_name('luns') return luns.get_children()
**** CubicPower OpenStack Study **** def _find_mapped_lun_igroup(self, path, initiator, os=None): """Find the igroup for mapped lun with initiator.""" lun_map_list = NaElement.create_node_with_children( 'lun-map-list-info', **{'path': path}) result = self.client.invoke_successfully(lun_map_list, True) igroups = result.get_child_by_name('initiator-groups') if igroups: igroup = None lun_id = None found = False igroup_infs = igroups.get_children() for ig in igroup_infs: initiators = ig.get_child_by_name('initiators') init_infs = initiators.get_children() for info in init_infs: if info.get_child_content('initiator-name') == initiator: found = True igroup = ig.get_child_content('initiator-group-name') lun_id = ig.get_child_content('lun-id') break if found: break return (igroup, lun_id)
**** CubicPower OpenStack Study **** def _clone_lun(self, name, new_name, space_reserved='true', src_block=0, dest_block=0, block_count=0): """Clone LUN with the given handle to the new name.""" metadata = self._get_lun_attr(name, 'metadata') path = metadata['Path'] (parent, splitter, name) = path.rpartition('/') clone_path = '%s/%s' % (parent, new_name) # zAPI can only handle 2^24 blocks per range bc_limit = 2 ** 24 # 8GB # zAPI can only handle 32 block ranges per call br_limit = 32 z_limit = br_limit * bc_limit # 256 GB z_calls = int(math.ceil(block_count / float(z_limit))) zbc = block_count if z_calls == 0: z_calls = 1 for call in range(0, z_calls): if zbc > z_limit: block_count = z_limit zbc -= z_limit else: block_count = zbc clone_start = NaElement.create_node_with_children( 'clone-start', **{'source-path': path, 'destination-path': clone_path, 'no-snap': 'true'}) if block_count > 0: block_ranges = NaElement("block-ranges") # zAPI can only handle 2^24 block ranges bc_limit = 2 ** 24 # 8GB segments = int(math.ceil(block_count / float(bc_limit))) bc = block_count for segment in range(0, segments): if bc > bc_limit: block_count = bc_limit bc -= bc_limit else: block_count = bc block_range = NaElement.create_node_with_children( 'block-range', **{'source-block-number': str(src_block), 'destination-block-number': str(dest_block), 'block-count': str(block_count)}) block_ranges.add_child_elem(block_range) src_block += int(block_count) dest_block += int(block_count) clone_start.add_child_elem(block_ranges) result = self.client.invoke_successfully(clone_start, True) clone_id_el = result.get_child_by_name('clone-id') cl_id_info = clone_id_el.get_child_by_name('clone-id-info') vol_uuid = cl_id_info.get_child_content('volume-uuid') clone_id = cl_id_info.get_child_content('clone-op-id') if vol_uuid: self._check_clone_status(clone_id, vol_uuid, name, new_name) self.vol_refresh_voluntary = True luns = self._get_lun_by_args(path=clone_path) if luns: cloned_lun = luns[0] self._set_space_reserve(clone_path, space_reserved) clone_meta = self._create_lun_meta(cloned_lun) handle = self._create_lun_handle(clone_meta) self._add_lun_to_table( NetAppLun(handle, new_name, cloned_lun.get_child_content('size'), clone_meta)) else: raise NaApiError('ENOLUNENTRY', 'No Lun entry found on the filer')
**** CubicPower OpenStack Study **** def _set_space_reserve(self, path, enable): """Sets the space reserve info.""" space_res = NaElement.create_node_with_children( 'lun-set-space-reservation-info', **{'path': path, 'enable': enable}) self.client.invoke_successfully(space_res, True)
**** CubicPower OpenStack Study **** def _check_clone_status(self, clone_id, vol_uuid, name, new_name): """Checks for the job till completed.""" clone_status = NaElement('clone-list-status') cl_id = NaElement('clone-id') clone_status.add_child_elem(cl_id) cl_id.add_node_with_children( 'clone-id-info', **{'clone-op-id': clone_id, 'volume-uuid': vol_uuid}) running = True clone_ops_info = None while running: result = self.client.invoke_successfully(clone_status, True) status = result.get_child_by_name('status') ops_info = status.get_children() if ops_info: for info in ops_info: if info.get_child_content('clone-state') == 'running': time.sleep(1) break else: running = False clone_ops_info = info break else: if clone_ops_info: fmt = {'name': name, 'new_name': new_name} if clone_ops_info.get_child_content('clone-state')\ == 'completed': LOG.debug(_("Clone operation with src %(name)s" " and dest %(new_name)s completed") % fmt) else: LOG.debug(_("Clone operation with src %(name)s" " and dest %(new_name)s failed") % fmt) raise NaApiError( clone_ops_info.get_child_content('error'), clone_ops_info.get_child_content('reason'))
**** CubicPower OpenStack Study **** def _get_lun_by_args(self, **args): """Retrieves luns with specified args.""" lun_info = NaElement.create_node_with_children('lun-list-info', **args) result = self.client.invoke_successfully(lun_info, True) luns = result.get_child_by_name('luns') return luns.get_children()
**** CubicPower OpenStack Study **** def _create_lun_meta(self, lun): """Creates lun metadata dictionary.""" self._is_naelement(lun) meta_dict = {} self._is_naelement(lun) meta_dict['Path'] = lun.get_child_content('path') meta_dict['OsType'] = lun.get_child_content('multiprotocol-type') meta_dict['SpaceReserved'] = lun.get_child_content( 'is-space-reservation-enabled') return meta_dict
**** CubicPower OpenStack Study **** def _update_volume_stats(self): """Retrieve status info from volume group.""" LOG.debug(_("Updating volume stats")) data = {} netapp_backend = 'NetApp_iSCSI_7mode_direct' backend_name = self.configuration.safe_get('volume_backend_name') data["volume_backend_name"] = ( backend_name or 'NetApp_iSCSI_7mode_direct') data["vendor_name"] = 'NetApp' data["driver_version"] = self.VERSION data["storage_protocol"] = 'iSCSI' data['reserved_percentage'] = 0 data['QoS_support'] = False self._get_capacity_info(data) provide_ems(self, self.client, data, netapp_backend, server_type="7mode") self._stats = data
**** CubicPower OpenStack Study **** def _get_lun_block_count(self, path): """Gets block counts for the lun.""" bs = super( NetAppDirect7modeISCSIDriver, self)._get_lun_block_count(path) api_version = self.client.get_api_version() if api_version: major = api_version[0] minor = api_version[1] if major == 1 and minor < 15: bs = bs - 1 return bs
**** CubicPower OpenStack Study **** def _get_capacity_info(self, data): """Calculates the capacity information for the filer.""" if (self.vol_refresh_time is None or self.vol_refresh_voluntary or timeutils.is_newer_than(self.vol_refresh_time, self.vol_refresh_interval)): try: job_set = set_safe_attr(self, 'vol_refresh_running', True) if not job_set: LOG.warn( _("Volume refresh job already running. Returning...")) return self.vol_refresh_voluntary = False self._refresh_capacity_info() self.vol_refresh_time = timeutils.utcnow() except Exception as e: LOG.warn(_("Error refreshing vol capacity. Message: %s"), e) finally: set_safe_attr(self, 'vol_refresh_running', False) data['total_capacity_gb'] = self.total_gb data['free_capacity_gb'] = self.free_gb
**** CubicPower OpenStack Study **** def _refresh_capacity_info(self): """Gets the latest capacity information.""" LOG.info(_("Refreshing capacity info for %s."), self.client) total_bytes = 0 free_bytes = 0 vols = self._get_filer_volumes() for vol in vols: volume = vol.get_child_content('name') if self.volume_list and not volume in self.volume_list: continue state = vol.get_child_content('state') inconsistent = vol.get_child_content('is-inconsistent') invalid = vol.get_child_content('is-invalid') if (state == 'online' and inconsistent == 'false' and invalid == 'false'): total_size = vol.get_child_content('size-total') if total_size: total_bytes = total_bytes + int(total_size) avl_size = vol.get_child_content('size-available') if avl_size: free_bytes = free_bytes + int(avl_size) self.total_gb = total_bytes / units.GiB self.free_gb = free_bytes / units.GiB
**** CubicPower OpenStack Study **** def delete_volume(self, volume): """Driver entry point for destroying existing volumes.""" super(NetAppDirect7modeISCSIDriver, self).delete_volume(volume) self.vol_refresh_voluntary = True
|