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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2012 VMware, Inc.
#
# 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.
"""
Management class for Storage-related functions (attach, detach, etc).
"""
from nova import exception
from nova.openstack.common import cfg
from nova.openstack.common import log as logging
from nova.virt.vmwareapi import vim_util
from nova.virt.vmwareapi import vm_util
from nova.virt.vmwareapi import volume_util
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class VMwareVolumeOps(object):
"""
Management class for Volume-related tasks
"""
def __init__(self, session):
self._session = session
def attach_disk_to_vm(self, vm_ref, instance_name,
adapter_type, disk_type, vmdk_path=None,
disk_size=None, linked_clone=False,
controller_key=None, unit_number=None,
device_name=None):
"""
Attach disk to VM by reconfiguration.
"""
client_factory = self._session._get_vim().client.factory
vmdk_attach_config_spec = vm_util.get_vmdk_attach_config_spec(
client_factory, adapter_type, disk_type,
vmdk_path, disk_size, linked_clone,
controller_key, unit_number, device_name)
LOG.debug(_("Reconfiguring VM instance %(instance_name)s to attach "
"disk %(vmdk_path)s or device %(device_name)s with type "
"%(disk_type)s") % locals())
reconfig_task = self._session._call_method(
self._session._get_vim(),
"ReconfigVM_Task", vm_ref,
spec=vmdk_attach_config_spec)
self._session._wait_for_task(instance_name, reconfig_task)
LOG.debug(_("Reconfigured VM instance %(instance_name)s to attach "
"disk %(vmdk_path)s or device %(device_name)s with type "
"%(disk_type)s") % locals())
def detach_disk_from_vm(self, vm_ref, instance_name, device):
"""
Detach disk from VM by reconfiguration.
"""
client_factory = self._session._get_vim().client.factory
vmdk_detach_config_spec = vm_util.get_vmdk_detach_config_spec(
client_factory, device)
disk_key = device.key
LOG.debug(_("Reconfiguring VM instance %(instance_name)s to detach "
"disk %(disk_key)s") % locals())
reconfig_task = self._session._call_method(
self._session._get_vim(),
"ReconfigVM_Task", vm_ref,
spec=vmdk_detach_config_spec)
self._session._wait_for_task(instance_name, reconfig_task)
LOG.debug(_("Reconfigured VM instance %(instance_name)s to detach "
"disk %(disk_key)s") % locals())
def discover_st(self, data):
"""Discover iSCSI targets."""
target_portal = data['target_portal']
target_iqn = data['target_iqn']
LOG.debug(_("Discovering iSCSI target %(target_iqn)s from "
"%(target_portal)s.") % locals())
device_name, uuid = volume_util.find_st(self._session, data)
if device_name:
LOG.debug(_("Storage target found. No need to discover"))
return (device_name, uuid)
# Rescan iSCSI HBA
volume_util.rescan_iscsi_hba(self._session)
# Find iSCSI Target again
device_name, uuid = volume_util.find_st(self._session, data)
if device_name:
LOG.debug(_("Discovered iSCSI target %(target_iqn)s from "
"%(target_portal)s.") % locals())
else:
LOG.debug(_("Unable to discovered iSCSI target %(target_iqn)s "
"from %(target_portal)s.") % locals())
return (device_name, uuid)
def get_volume_connector(self, instance):
"""Return volume connector information."""
iqn = volume_util.get_host_iqn(self._session)
return {
'ip': CONF.vmwareapi_host_ip,
'initiator': iqn,
'host': CONF.vmwareapi_host_ip
}
def attach_volume(self, connection_info, instance, mountpoint):
"""Attach volume storage to VM instance."""
instance_name = instance['name']
vm_ref = vm_util.get_vm_ref_from_name(self._session, instance_name)
if vm_ref is None:
raise exception.InstanceNotFound(instance_id=instance_name)
# Attach Volume to VM
LOG.debug(_("Attach_volume: %(connection_info)s, %(instance_name)s, "
"%(mountpoint)s") % locals())
driver_type = connection_info['driver_volume_type']
if driver_type not in ['iscsi']:
raise exception.VolumeDriverNotFound(driver_type=driver_type)
data = connection_info['data']
mount_unit = volume_util.mountpoint_to_number(mountpoint)
# Discover iSCSI Target
device_name, uuid = self.discover_st(data)
if device_name is None:
raise volume_util.StorageError(_("Unable to find iSCSI Target"))
# Get the vmdk file name that the VM is pointing to
hardware_devices = self._session._call_method(vim_util,
"get_dynamic_property", vm_ref,
"VirtualMachine", "config.hardware.device")
vmdk_file_path, controller_key, adapter_type, disk_type, unit_number \
= vm_util.get_vmdk_path_and_adapter_type(hardware_devices)
# Figure out the correct unit number
if unit_number < mount_unit:
unit_number = mount_unit
else:
unit_number = unit_number + 1
self.attach_disk_to_vm(vm_ref, instance_name,
adapter_type, disk_type="rdmp",
controller_key=controller_key,
unit_number=unit_number,
device_name=device_name)
LOG.info(_("Mountpoint %(mountpoint)s attached to "
"instance %(instance_name)s") % locals())
def detach_volume(self, connection_info, instance, mountpoint):
"""Detach volume storage to VM instance."""
instance_name = instance['name']
vm_ref = vm_util.get_vm_ref_from_name(self._session, instance_name)
if vm_ref is None:
raise exception.InstanceNotFound(instance_id=instance_name)
# Detach Volume from VM
LOG.debug(_("Detach_volume: %(instance_name)s, %(mountpoint)s")
% locals())
driver_type = connection_info['driver_volume_type']
if driver_type not in ['iscsi']:
raise exception.VolumeDriverNotFound(driver_type=driver_type)
data = connection_info['data']
# Discover iSCSI Target
device_name, uuid = volume_util.find_st(self._session, data)
if device_name is None:
raise volume_util.StorageError(_("Unable to find iSCSI Target"))
# Get the vmdk file name that the VM is pointing to
hardware_devices = self._session._call_method(vim_util,
"get_dynamic_property", vm_ref,
"VirtualMachine", "config.hardware.device")
device = vm_util.get_rdm_disk(hardware_devices, uuid)
if device is None:
raise volume_util.StorageError(_("Unable to find volume"))
self.detach_disk_from_vm(vm_ref, instance_name, device)
LOG.info(_("Mountpoint %(mountpoint)s detached from "
"instance %(instance_name)s") % locals())
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