# Copyright 2016 IBM Corp. 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. """ A connection to a z Systems through Dynamic Partition Manager( DPM) APIs. Supports DPM APIs for virtualization in z Systems """ import nova_dpm.conf from nova import context as context_object from nova import exception from nova.objects import flavor as flavor_object from nova.virt import driver from nova_dpm.virt.dpm import client_proxy from nova_dpm.virt.dpm import host as Host from nova_dpm.virt.dpm import utils from nova_dpm.virt.dpm import vm from oslo_log import log as logging from oslo_utils import importutils LOG = logging.getLogger(__name__) CONF = nova_dpm.conf.CONF dpm_volume_drivers = [ 'fibre_channel=nova_dpm.virt.dpm.volume.' 'fibrechannel.DpmFibreChannelVolumeDriver', ] class DPMDriver(driver.ComputeDriver): def __init__(self, virtapi): super(DPMDriver, self).__init__(virtapi) LOG.debug("__init__") self.virtapi = virtapi self._compute_event_callback = None self._host = None self._client = None self._cpc = None # Retrieve zhmc ipaddress, username, password from the nova.conf zhmc = CONF.dpm.hmc userid = CONF.dpm.hmc_username password = CONF.dpm.hmc_password self._client = client_proxy.get_client_for_sesion(zhmc, userid, password) LOG.debug("HMC details %(zhmc)s %(userid)s" % {'zhmc': zhmc, 'userid': userid}) self._initiator = None self._fc_wwnns = None self._fc_wwpns = None self.volume_drivers = self._get_volume_drivers() def init_host(self, host): """Driver initialization of the hypervisor node""" LOG.debug("init_host") # retrieve from ncpu service configurationfile self._conf = {'cpcsubset_name': CONF.dpm.host, 'cpc_object_id': CONF.dpm.cpc_object_id, 'max_processors': CONF.dpm.max_processors, 'max_memory_mb': CONF.dpm.max_memory, 'max_partitions': CONF.dpm.max_instances, 'physical_storage_adapter_mappings': CONF.dpm.physical_storage_adapter_mappings} self._cpc = self._client.cpcs.find(**{ "object-id": self._conf['cpc_object_id']}) LOG.debug("Matching hypervisor found %(cpcsubset_name)s for object-id " "%(cpcid)s and CPC %(cpcname)s" % {'cpcsubset_name': self._conf['cpcsubset_name'], 'cpcid': self._conf['cpc_object_id'], 'cpcname': self._cpc.properties['name']}) utils.valide_host_conf(self._conf, self._cpc) self._host = Host.Host(self._conf, self._cpc, self._client) def get_available_resource(self, nodename): """Retrieve resource information. This method is called when nova-compute launches, and as part of a periodic task that records the results in the DB. :param nodename: node which the caller want to get resources from a driver that manages only one node can safely ignore this :returns: Dictionary describing resources """ LOG.debug("get_available_resource") dictval = self._host.properties return dictval def get_available_nodes(self, refresh=False): """Returns nodenames of all nodes managed by the compute service. This method is for multi compute-nodes support. If a driver supports multi compute-nodes, this method returns a list of nodenames managed by the service. Otherwise, this method should return [hypervisor_hostname]. """ # TODO(preethipy): Refresh parameter should be handled to fetch # updated nodenames LOG.debug("get_available_nodes return node %(cpcsubset_name)s" % {'cpcsubset_name': self._host.properties[ "hypervisor_hostname"]}) nodenames = [self._host.properties["hypervisor_hostname"]] return nodenames def node_is_available(self, nodename): """Return whether this compute service manages a particular node.""" LOG.debug("node_is_available") if nodename in self.get_available_nodes(): return True # Refresh and check again. return nodename in self.get_available_nodes(refresh=True) def attach_volume(self, context, connection_info, instance, mountpoint, disk_bus=None, device_type=None, encryption=None): # There currently is no need for disk_info. I just left it in # in case we need it in the future disk_info = {} self._connect_volume(connection_info, disk_info) def detach_volume(self, connection_info, instance, mountpoint, encryption=None): # There currently is no need for disk_dev. I just left it in # in case we need it in the future disk_dev = {} self._disconnect_volume(connection_info, disk_dev) def _get_volume_drivers(self): driver_registry = dict() for driver_str in dpm_volume_drivers: driver_type, _sep, driver = driver_str.partition('=') driver_class = importutils.import_class(driver) driver_registry[driver_type] = driver_class(self._host) return driver_registry def _get_volume_driver(self, connection_info): driver_type = connection_info.get('driver_volume_type') if driver_type not in self.volume_drivers: raise exception.VolumeDriverNotFound(driver_type=driver_type) return self.volume_drivers[driver_type] def get_volume_connector(self, instance): """The Fibre Channel connector properties.""" inst = vm.PartitionInstance(instance, self._cpc) inst.get_hba_properties() props = {} wwpns = {} # TODO(stefan) replace the next lines of code by a call # to DPM to retrieve WWPNs for the instance hbas = ["0x50014380242b9751", "0x50014380242b9711"] if hbas: for hba in hbas: wwpn = hba.replace('0x', '') wwpns.append(wwpn) if wwpns: props['wwpns'] = wwpns return props def _connect_volume(self, connection_info, disk_info): vol_driver = self._get_volume_driver(connection_info) vol_driver.connect_volume(connection_info, disk_info) def _disconnect_volume(self, connection_info, disk_dev): vol_driver = self._get_volume_driver(connection_info) vol_driver.disconnect_volume(connection_info, disk_dev) def list_instances(self): partition_list = vm.cpcsubset_partition_list(self._cpc) part_list = [] for partition in partition_list: part_list.append(partition.get_property('name')) return part_list def get_info(self, instance): info = vm.PartitionInstanceInfo(instance, self._cpc) return info def spawn(self, context, instance, image_meta, injected_files, admin_password, network_info=None, block_device_info=None, flavor=None): if not flavor: context = context_object.get_admin_context(read_deleted='yes') flavor = ( flavor_object.Flavor.get_by_id(context, instance.instance_type_id)) LOG.debug("Flavor = %(flavor)s" % {'flavor': flavor}) inst = vm.PartitionInstance(instance, self._cpc, flavor) inst.create(inst.properties()) for vif in network_info: inst.attach_nic(self._conf, vif) block_device_mapping = driver.block_device_info_get_mapping( block_device_info) inst.attachHba(self._conf) inst._build_resources(context, instance, block_device_mapping) inst.launch() def destroy(self, context, instance, network_info, block_device_info=None, destroy_disks=True, migrate_data=None): inst = vm.PartitionInstance(instance, self._cpc) inst.destroy() def power_off(self, instance, timeout=0, retry_interval=0): inst = vm.PartitionInstance(instance, self._cpc) inst.power_off_vm() def power_on(self, context, instance, network_info, block_device_info=None): inst = vm.PartitionInstance(instance, self._cpc) inst.power_on_vm() def reboot(self, context, instance, network_info, reboot_type, block_device_info=None, bad_volumes_callback=None): inst = vm.PartitionInstance(instance, self._cpc) inst.reboot_vm()