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OpenStack Study: helpers.py**** CubicPower OpenStack Study ****
# 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. # import random import re import six import unicodedata from eventlet import greenthread from cinder import context from cinder import exception from cinder.openstack.common import excutils from cinder.openstack.common import log as logging from cinder.openstack.common import loopingcall from cinder.openstack.common import strutils from cinder import utils from cinder.volume.drivers.ibm.storwize_svc import ssh as storwize_ssh from cinder.volume import volume_types LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class StorwizeHelpers(object):
**** CubicPower OpenStack Study **** def __init__(self, run_ssh): self.ssh = storwize_ssh.StorwizeSSH(run_ssh) self.check_fcmapping_interval = 3 @staticmethod
**** CubicPower OpenStack Study **** def handle_keyerror(cmd, out): msg = (_('Could not find key in output of command %(cmd)s: %(out)s') % {'out': out, 'cmd': cmd}) raise exception.VolumeBackendAPIException(data=msg)
**** CubicPower OpenStack Study **** def compression_enabled(self): """Return whether or not compression is enabled for this system.""" resp = self.ssh.lslicense() keys = ['license_compression_enclosures', 'license_compression_capacity'] for key in keys: if resp.get(key, '0') != '0': return True return False
**** CubicPower OpenStack Study **** def get_system_info(self): """Return system's name, ID, and code level.""" resp = self.ssh.lssystem() level = resp['code_level'] match_obj = re.search('([0-9].){3}[0-9]', level) if match_obj is None: msg = _('Failed to get code level (%s).') % level raise exception.VolumeBackendAPIException(data=msg) code_level = match_obj.group().split('.') return {'code_level': tuple([int(x) for x in code_level]), 'system_name': resp['name'], 'system_id': resp['id']}
**** CubicPower OpenStack Study **** def get_pool_attrs(self, pool): """Return attributes for the specified pool.""" return self.ssh.lsmdiskgrp(pool)
**** CubicPower OpenStack Study **** def get_available_io_groups(self): """Return list of available IO groups.""" iogrps = [] resp = self.ssh.lsiogrp() for iogrp in resp: try: if int(iogrp['node_count']) > 0: iogrps.append(int(iogrp['id'])) except KeyError: self.handle_keyerror('lsiogrp', iogrp) except ValueError: msg = (_('Expected integer for node_count, ' 'svcinfo lsiogrp returned: %(node)s') % {'node': iogrp['node_count']}) LOG.error(msg) raise exception.VolumeBackendAPIException(data=msg) return iogrps
**** CubicPower OpenStack Study **** def get_node_info(self): """Return dictionary containing information on system's nodes.""" nodes = {} resp = self.ssh.lsnode() for node_data in resp: try: if node_data['status'] != 'online': continue node = {} node['id'] = node_data['id'] node['name'] = node_data['name'] node['IO_group'] = node_data['IO_group_id'] node['iscsi_name'] = node_data['iscsi_name'] node['WWNN'] = node_data['WWNN'] node['status'] = node_data['status'] node['WWPN'] = [] node['ipv4'] = [] node['ipv6'] = [] node['enabled_protocols'] = [] nodes[node['id']] = node except KeyError: self.handle_keyerror('lsnode', node_data) return nodes
**** CubicPower OpenStack Study **** def add_iscsi_ip_addrs(self, storage_nodes): """Add iSCSI IP addresses to system node information.""" resp = self.ssh.lsportip() for ip_data in resp: try: state = ip_data['state'] if ip_data['node_id'] in storage_nodes and ( state == 'configured' or state == 'online'): node = storage_nodes[ip_data['node_id']] if len(ip_data['IP_address']): node['ipv4'].append(ip_data['IP_address']) if len(ip_data['IP_address_6']): node['ipv6'].append(ip_data['IP_address_6']) except KeyError: self.handle_keyerror('lsportip', ip_data)
**** CubicPower OpenStack Study **** def add_fc_wwpns(self, storage_nodes): """Add FC WWPNs to system node information.""" for key in storage_nodes: node = storage_nodes[key] resp = self.ssh.lsnode(node_id=node['id']) wwpns = set(node['WWPN']) for i, s in resp.select('port_id', 'port_status'): if 'unconfigured' != s: wwpns.add(i) node['WWPN'] = list(wwpns) LOG.info(_('WWPN on node %(node)s: %(wwpn)s') % {'node': node['id'], 'wwpn': node['WWPN']})
**** CubicPower OpenStack Study **** def add_chap_secret_to_host(self, host_name): """Generate and store a randomly-generated CHAP secret for the host.""" chap_secret = utils.generate_password() self.ssh.add_chap_secret(chap_secret, host_name) return chap_secret
**** CubicPower OpenStack Study **** def get_chap_secret_for_host(self, host_name): """Generate and store a randomly-generated CHAP secret for the host.""" resp = self.ssh.lsiscsiauth() host_found = False for host_data in resp: try: if host_data['name'] == host_name: host_found = True if host_data['iscsi_auth_method'] == 'chap': return host_data['iscsi_chap_secret'] except KeyError: self.handle_keyerror('lsiscsiauth', host_data) if not host_found: msg = _('Failed to find host %s') % host_name raise exception.VolumeBackendAPIException(data=msg) return None
**** CubicPower OpenStack Study **** def get_conn_fc_wwpns(self, host): wwpns = set() resp = self.ssh.lsfabric(host=host) for wwpn in resp.select('local_wwpn'): if wwpn is not None: wwpns.add(wwpn) return list(wwpns)
**** CubicPower OpenStack Study **** def get_host_from_connector(self, connector): """Return the Storwize host described by the connector.""" LOG.debug(_('enter: get_host_from_connector: %s') % connector) # If we have FC information, we have a faster lookup option host_name = None if 'wwpns' in connector: for wwpn in connector['wwpns']: resp = self.ssh.lsfabric(wwpn=wwpn) for wwpn_info in resp: try: if (wwpn_info['remote_wwpn'] and wwpn_info['name'] and wwpn_info['remote_wwpn'].lower() == wwpn.lower()): host_name = wwpn_info['name'] except KeyError: self.handle_keyerror('lsfabric', wwpn_info) # That didn't work, so try exhaustive search if host_name is None: hosts_info = self.ssh.lshost() for name in hosts_info.select('name'): resp = self.ssh.lshost(host=name) for iscsi, wwpn in resp.select('iscsi_name', 'WWPN'): if ('initiator' in connector and iscsi == connector['initiator']): host_name = name elif ('wwpns' in connector and len(connector['wwpns']) and wwpn and wwpn.lower() in [str(x).lower() for x in connector['wwpns']]): host_name = name LOG.debug(_('leave: get_host_from_connector: host %s') % host_name) return host_name
**** CubicPower OpenStack Study **** def create_host(self, connector): """Create a new host on the storage system. We create a host name and associate it with the given connection information. The host name will be a cleaned up version of the given host name (at most 55 characters), plus a random 8-character suffix to avoid collisions. The total length should be at most 63 characters. """ LOG.debug(_('enter: create_host: host %s') % connector['host']) # Before we start, make sure host name is a string and that we have at # least one port. host_name = connector['host'] if not isinstance(host_name, six.string_types): msg = _('create_host: Host name is not unicode or string') LOG.error(msg) raise exception.VolumeDriverException(message=msg) ports = [] if 'initiator' in connector: ports.append(['initiator', '%s' % connector['initiator']]) if 'wwpns' in connector: for wwpn in connector['wwpns']: ports.append(['wwpn', '%s' % wwpn]) if not len(ports): msg = _('create_host: No initiators or wwpns supplied.') LOG.error(msg) raise exception.VolumeDriverException(message=msg) # Build a host name for the Storwize host - first clean up the name if isinstance(host_name, unicode): host_name = unicodedata.normalize('NFKD', host_name).encode( 'ascii', 'replace').decode('ascii') for num in range(0, 128): ch = str(chr(num)) if not ch.isalnum() and ch not in [' ', '.', '-', '_']: host_name = host_name.replace(ch, '-') # Storwize doesn't like hostname that doesn't starts with letter or _. if not re.match('^[A-Za-z]', host_name): host_name = '_' + host_name # Add a random 8-character suffix to avoid collisions rand_id = str(random.randint(0, 99999999)).zfill(8) host_name = '%s-%s' % (host_name[:55], rand_id) # Create a host with one port port = ports.pop(0) self.ssh.mkhost(host_name, port[0], port[1]) # Add any additional ports to the host for port in ports: self.ssh.addhostport(host_name, port[0], port[1]) LOG.debug(_('leave: create_host: host %(host)s - %(host_name)s') % {'host': connector['host'], 'host_name': host_name}) return host_name
**** CubicPower OpenStack Study **** def delete_host(self, host_name): self.ssh.rmhost(host_name)
**** CubicPower OpenStack Study **** def map_vol_to_host(self, volume_name, host_name, multihostmap): """Create a mapping between a volume to a host.""" LOG.debug(_('enter: map_vol_to_host: volume %(volume_name)s to ' 'host %(host_name)s') % {'volume_name': volume_name, 'host_name': host_name}) # Check if this volume is already mapped to this host mapped = False luns_used = [] result_lun = '-1' resp = self.ssh.lshostvdiskmap(host_name) for mapping_info in resp: luns_used.append(int(mapping_info['SCSI_id'])) if mapping_info['vdisk_name'] == volume_name: mapped = True result_lun = mapping_info['SCSI_id'] if not mapped: # Find unused lun luns_used.sort() result_lun = str(len(luns_used)) for index, n in enumerate(luns_used): if n > index: result_lun = str(index) break self.ssh.mkvdiskhostmap(host_name, volume_name, result_lun, multihostmap) LOG.debug(_('leave: map_vol_to_host: LUN %(result_lun)s, volume ' '%(volume_name)s, host %(host_name)s') % {'result_lun': result_lun, 'volume_name': volume_name, 'host_name': host_name}) return result_lun
**** CubicPower OpenStack Study **** def unmap_vol_from_host(self, volume_name, host_name): """Unmap the volume and delete the host if it has no more mappings.""" LOG.debug(_('enter: unmap_vol_from_host: volume %(volume_name)s from ' 'host %(host_name)s') % {'volume_name': volume_name, 'host_name': host_name}) # Check if the mapping exists resp = self.ssh.lsvdiskhostmap(volume_name) if not len(resp): LOG.warning(_('unmap_vol_from_host: No mapping of volume ' '%(vol_name)s to any host found.') % {'vol_name': volume_name}) return if host_name is None: if len(resp) > 1: LOG.warning(_('unmap_vol_from_host: Multiple mappings of ' 'volume %(vol_name)s found, no host ' 'specified.') % {'vol_name': volume_name}) return else: host_name = resp[0]['host_name'] else: found = False for h in resp.select('host_name'): if h == host_name: found = True if not found: LOG.warning(_('unmap_vol_from_host: No mapping of volume ' '%(vol_name)s to host %(host)s found.') % {'vol_name': volume_name, 'host': host_name}) # We now know that the mapping exists self.ssh.rmvdiskhostmap(host_name, volume_name) # If this host has no more mappings, delete it resp = self.ssh.lshostvdiskmap(host_name) if not len(resp): self.delete_host(host_name) LOG.debug(_('leave: unmap_vol_from_host: volume %(volume_name)s from ' 'host %(host_name)s') % {'volume_name': volume_name, 'host_name': host_name}) @staticmethod
**** CubicPower OpenStack Study **** def build_default_opts(config): # Ignore capitalization protocol = config.storwize_svc_connection_protocol if protocol.lower() == 'fc': protocol = 'FC' elif protocol.lower() == 'iscsi': protocol = 'iSCSI' opt = {'rsize': config.storwize_svc_vol_rsize, 'warning': config.storwize_svc_vol_warning, 'autoexpand': config.storwize_svc_vol_autoexpand, 'grainsize': config.storwize_svc_vol_grainsize, 'compression': config.storwize_svc_vol_compression, 'easytier': config.storwize_svc_vol_easytier, 'protocol': protocol, 'multipath': config.storwize_svc_multipath_enabled, 'iogrp': config.storwize_svc_vol_iogrp} return opt @staticmethod
**** CubicPower OpenStack Study **** def check_vdisk_opts(state, opts): # Check that rsize is either -1 or between 0 and 100 if not (opts['rsize'] >= -1 and opts['rsize'] <= 100): raise exception.InvalidInput( reason=_('Illegal value specified for storwize_svc_vol_rsize: ' 'set to either a percentage (0-100) or -1')) # Check that warning is either -1 or between 0 and 100 if not (opts['warning'] >= -1 and opts['warning'] <= 100): raise exception.InvalidInput( reason=_('Illegal value specified for ' 'storwize_svc_vol_warning: ' 'set to a percentage (0-100)')) # Check that grainsize is 32/64/128/256 if opts['grainsize'] not in [32, 64, 128, 256]: raise exception.InvalidInput( reason=_('Illegal value specified for ' 'storwize_svc_vol_grainsize: set to either ' '32, 64, 128, or 256')) # Check that compression is supported if opts['compression'] and not state['compression_enabled']: raise exception.InvalidInput( reason=_('System does not support compression')) # Check that rsize is set if compression is set if opts['compression'] and opts['rsize'] == -1: raise exception.InvalidInput( reason=_('If compression is set to True, rsize must ' 'also be set (not equal to -1)')) # Check that the requested protocol is enabled if opts['protocol'] not in state['enabled_protocols']: raise exception.InvalidInput( reason=_('Illegal value %(prot)s specified for ' 'storwize_svc_connection_protocol: ' 'valid values are %(enabled)s') % {'prot': opts['protocol'], 'enabled': ','.join(state['enabled_protocols'])}) if opts['iogrp'] not in state['available_iogrps']: avail_grps = ''.join(str(e) for e in state['available_iogrps']) raise exception.InvalidInput( reason=_('I/O group %(iogrp)d is not valid; available ' 'I/O groups are %(avail)s') % {'iogrp': opts['iogrp'], 'avail': avail_grps})
**** CubicPower OpenStack Study **** def get_vdisk_params(self, config, state, type_id, volume_type=None): """Return the parameters for creating the vdisk. Takes volume type and defaults from config options into account. """ opts = self.build_default_opts(config) if volume_type is None and type_id is not None: ctxt = context.get_admin_context() volume_type = volume_types.get_volume_type(ctxt, type_id) if volume_type: specs = dict(volume_type).get('extra_specs') for k, value in specs.iteritems(): # Get the scope, if using scope format key_split = k.split(':') if len(key_split) == 1: scope = None key = key_split[0] else: scope = key_split[0] key = key_split[1] # We generally do not look at capabilities in the driver, but # protocol is a special case where the user asks for a given # protocol and we want both the scheduler and the driver to act # on the value. if ((not scope or scope == 'capabilities') and key == 'storage_protocol'): scope = None key = 'protocol' words = value.split() if not (words and len(words) == 2 and words[0] == ' LOG.error(_('Protocol must be specified as ' '\' del words[0] value = words[0] # Any keys that the driver should look at should have the # 'drivers' scope. if scope and scope != 'drivers': continue if key in opts: this_type = type(opts[key]).__name__ if this_type == 'int': value = int(value) elif this_type == 'bool': value = strutils.bool_from_string(value) opts[key] = value self.check_vdisk_opts(state, opts) return opts @staticmethod
**** CubicPower OpenStack Study **** def _get_vdisk_create_params(opts): easytier = 'on' if opts['easytier'] else 'off' if opts['rsize'] == -1: params = [] else: params = ['-rsize', '%s%%' % str(opts['rsize']), '-autoexpand', '-warning', '%s%%' % str(opts['warning'])] if not opts['autoexpand']: params.remove('-autoexpand') if opts['compression']: params.append('-compressed') else: params.extend(['-grainsize', str(opts['grainsize'])]) params.extend(['-easytier', easytier]) return params
**** CubicPower OpenStack Study **** def create_vdisk(self, name, size, units, pool, opts): LOG.debug(_('enter: create_vdisk: vdisk %s ') % name) params = self._get_vdisk_create_params(opts) self.ssh.mkvdisk(name, size, units, pool, opts, params) LOG.debug(_('leave: _create_vdisk: volume %s ') % name)
**** CubicPower OpenStack Study **** def get_vdisk_attributes(self, vdisk): attrs = self.ssh.lsvdisk(vdisk) return attrs
**** CubicPower OpenStack Study **** def is_vdisk_defined(self, vdisk_name): """Check if vdisk is defined.""" attrs = self.get_vdisk_attributes(vdisk_name) return attrs is not None
**** CubicPower OpenStack Study **** def _prepare_fc_map(self, fc_map_id, timeout): self.ssh.prestartfcmap(fc_map_id) mapping_ready = False wait_time = 5 max_retries = (timeout / wait_time) + 1 for try_number in range(1, max_retries): mapping_attrs = self._get_flashcopy_mapping_attributes(fc_map_id) if (mapping_attrs is None or 'status' not in mapping_attrs): break if mapping_attrs['status'] == 'prepared': mapping_ready = True break elif mapping_attrs['status'] == 'stopped': self.ssh.prestartfcmap(fc_map_id) elif mapping_attrs['status'] != 'preparing': msg = (_('Unexecpted mapping status %(status)s for mapping' '%(id)s. Attributes: %(attr)s') % {'status': mapping_attrs['status'], 'id': fc_map_id, 'attr': mapping_attrs}) LOG.error(msg) raise exception.VolumeBackendAPIException(data=msg) greenthread.sleep(wait_time) if not mapping_ready: msg = (_('Mapping %(id)s prepare failed to complete within the' 'allotted %(to)d seconds timeout. Terminating.') % {'id': fc_map_id, 'to': timeout}) LOG.error(msg) raise exception.VolumeDriverException(message=msg)
**** CubicPower OpenStack Study **** def run_flashcopy(self, source, target, timeout, full_copy=True): """Create a FlashCopy mapping from the source to the target.""" LOG.debug(_('enter: run_flashcopy: execute FlashCopy from source ' '%(source)s to target %(target)s') % {'source': source, 'target': target}) fc_map_id = self.ssh.mkfcmap(source, target, full_copy) self._prepare_fc_map(fc_map_id, timeout) self.ssh.startfcmap(fc_map_id) LOG.debug(_('leave: run_flashcopy: FlashCopy started from ' '%(source)s to %(target)s') % {'source': source, 'target': target})
**** CubicPower OpenStack Study **** def _get_vdisk_fc_mappings(self, vdisk): """Return FlashCopy mappings that this vdisk is associated with.""" mapping_ids = [] resp = self.ssh.lsvdiskfcmappings(vdisk) for id in resp.select('id'): mapping_ids.append(id) return mapping_ids
**** CubicPower OpenStack Study **** def _get_flashcopy_mapping_attributes(self, fc_map_id): resp = self.ssh.lsfcmap(fc_map_id) if not len(resp): return None return resp[0]
**** CubicPower OpenStack Study **** def _check_vdisk_fc_mappings(self, name, allow_snaps=True): """FlashCopy mapping check helper.""" LOG.debug(_('Loopcall: _check_vdisk_fc_mappings(), vdisk %s') % name) mapping_ids = self._get_vdisk_fc_mappings(name) wait_for_copy = False for map_id in mapping_ids: attrs = self._get_flashcopy_mapping_attributes(map_id) if not attrs: continue source = attrs['source_vdisk_name'] target = attrs['target_vdisk_name'] copy_rate = attrs['copy_rate'] status = attrs['status'] if copy_rate == '0': if source == name: # Vdisk with snapshots. Return False if snapshot # not allowed. if not allow_snaps: raise loopingcall.LoopingCallDone(retvalue=False) self.ssh.chfcmap(map_id, copyrate='50', autodel='on') wait_for_copy = True else: # A snapshot if target != name: msg = (_('Vdisk %(name)s not involved in ' 'mapping %(src)s -> %(tgt)s') % {'name': name, 'src': source, 'tgt': target}) LOG.error(msg) raise exception.VolumeDriverException(message=msg) if status in ['copying', 'prepared']: self.ssh.stopfcmap(map_id) # Need to wait for the fcmap to change to # stopped state before remove fcmap wait_for_copy = True elif status in ['stopping', 'preparing']: wait_for_copy = True else: self.ssh.rmfcmap(map_id) # Case 4: Copy in progress - wait and will autodelete else: if status == 'prepared': self.ssh.stopfcmap(map_id) self.ssh.rmfcmap(map_id) elif status == 'idle_or_copied': # Prepare failed self.ssh.rmfcmap(map_id) else: wait_for_copy = True if not wait_for_copy or not len(mapping_ids): raise loopingcall.LoopingCallDone(retvalue=True)
**** CubicPower OpenStack Study **** def ensure_vdisk_no_fc_mappings(self, name, allow_snaps=True): """Ensure vdisk has no flashcopy mappings.""" timer = loopingcall.FixedIntervalLoopingCall( self._check_vdisk_fc_mappings, name, allow_snaps) # Create a timer greenthread. The default volume service heart # beat is every 10 seconds. The flashcopy usually takes hours # before it finishes. Don't set the sleep interval shorter # than the heartbeat. Otherwise volume service heartbeat # will not be serviced. LOG.debug(_('Calling _ensure_vdisk_no_fc_mappings: vdisk %s') % name) ret = timer.start(interval=self.check_fcmapping_interval).wait() timer.stop() return ret
**** CubicPower OpenStack Study **** def delete_vdisk(self, vdisk, force): """Ensures that vdisk is not part of FC mapping and deletes it.""" LOG.debug(_('enter: delete_vdisk: vdisk %s') % vdisk) if not self.is_vdisk_defined(vdisk): LOG.info(_('Tried to delete non-existant vdisk %s.') % vdisk) return self.ensure_vdisk_no_fc_mappings(vdisk) self.ssh.rmvdisk(vdisk, force=force) LOG.debug(_('leave: delete_vdisk: vdisk %s') % vdisk)
**** CubicPower OpenStack Study **** def create_copy(self, src, tgt, src_id, config, opts, full_copy): """Create a new snapshot using FlashCopy.""" LOG.debug(_('enter: create_copy: snapshot %(src)s to %(tgt)s') % {'tgt': tgt, 'src': src}) src_attrs = self.get_vdisk_attributes(src) if src_attrs is None: msg = (_('create_copy: Source vdisk %(src)s (%(src_id)s) ' 'does not exist') % {'src': src, 'src_id': src_id}) LOG.error(msg) raise exception.VolumeDriverException(message=msg) src_size = src_attrs['capacity'] pool = config.storwize_svc_volpool_name self.create_vdisk(tgt, src_size, 'b', pool, opts) timeout = config.storwize_svc_flashcopy_timeout try: self.run_flashcopy(src, tgt, timeout, full_copy=full_copy) except Exception: with excutils.save_and_reraise_exception(): self.delete_vdisk(tgt, True) LOG.debug(_('leave: _create_copy: snapshot %(tgt)s from ' 'vdisk %(src)s') % {'tgt': tgt, 'src': src})
**** CubicPower OpenStack Study **** def extend_vdisk(self, vdisk, amount): self.ssh.expandvdisksize(vdisk, amount)
**** CubicPower OpenStack Study **** def add_vdisk_copy(self, vdisk, dest_pool, volume_type, state, config): """Add a vdisk copy in the given pool.""" this_pool = config.storwize_svc_volpool_name resp = self.ssh.lsvdiskcopy(vdisk) orig_copy_id = None for copy_id, mdisk_grp in resp.select('copy_id', 'mdisk_grp_name'): if mdisk_grp == this_pool: orig_copy_id = copy_id if orig_copy_id is None: msg = (_('add_vdisk_copy started without a vdisk copy in the ' 'expected pool.')) LOG.error(msg) raise exception.VolumeDriverException(message=msg) if volume_type is None: opts = self.get_vdisk_params(config, state, None) else: opts = self.get_vdisk_params(config, state, volume_type['id'], volume_type=volume_type) params = self._get_vdisk_create_params(opts) new_copy_id = self.ssh.addvdiskcopy(vdisk, dest_pool, params) return (orig_copy_id, new_copy_id)
**** CubicPower OpenStack Study **** def is_vdisk_copy_synced(self, vdisk, copy_id): sync = self.ssh.lsvdiskcopy(vdisk, copy_id=copy_id)[0]['sync'] if sync == 'yes': return True return False
**** CubicPower OpenStack Study **** def rm_vdisk_copy(self, vdisk, copy_id): self.ssh.rmvdiskcopy(vdisk, copy_id) @staticmethod
**** CubicPower OpenStack Study **** def can_migrate_to_host(host, state): if 'location_info' not in host['capabilities']: return None info = host['capabilities']['location_info'] try: (dest_type, dest_id, dest_pool) = info.split(':') except ValueError: return None if (dest_type != 'StorwizeSVCDriver' or dest_id != state['system_id']): return None return dest_pool
**** CubicPower OpenStack Study **** def change_vdisk_options(self, vdisk, changes, opts, state): if 'warning' in opts: opts['warning'] = '%s%%' % str(opts['warning']) if 'easytier' in opts: opts['easytier'] = 'on' if opts['easytier'] else 'off' if 'autoexpand' in opts: opts['autoexpand'] = 'on' if opts['autoexpand'] else 'off' for key in changes: self.ssh.chvdisk(vdisk, ['-' + key, opts[key]])
**** CubicPower OpenStack Study **** def change_vdisk_iogrp(self, vdisk, state, iogrp): if state['code_level'] < (6, 4, 0, 0): LOG.debug(_('Ignore change IO group as storage code level is ' '%(code_level)s, below the required 6.4.0.0') % {'code_level': state['code_level']}) else: self.ssh.movevdisk(vdisk, str(iogrp[0])) self.ssh.addvdiskaccess(vdisk, str(iogrp[0])) self.ssh.rmvdiskaccess(vdisk, str(iogrp[1]))
**** CubicPower OpenStack Study **** def vdisk_by_uid(self, vdisk_uid): """Returns the properties of the vdisk with the specified UID. Returns None if no such disk exists. """ vdisks = self.ssh.lsvdisks_from_filter('vdisk_UID', vdisk_uid) if len(vdisks) == 0: return None if len(vdisks) != 1: msg = (_('Expected single vdisk returned from lsvdisk when ' 'filtering on vdisk_UID. %{count}s were returned.') % {'count': len(vdisks)}) LOG.error(msg) raise exception.VolumeBackendAPIException(data=msg) vdisk = vdisks.result[0] return self.ssh.lsvdisk(vdisk['name'])
**** CubicPower OpenStack Study **** def is_vdisk_in_use(self, vdisk): """Returns True if the specified vdisk is mapped to at least 1 host.""" resp = self.ssh.lsvdiskhostmap(vdisk) return len(resp) != 0
**** CubicPower OpenStack Study **** def rename_vdisk(self, vdisk, new_name): self.ssh.chvdisk(vdisk, ['-name', new_name])
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