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# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright 2012 Pedro Navarro Perez
# 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.
"""
Helper methods for operations related to the management of volumes,
and storage repositories
"""
import subprocess
import sys
import time
from nova import block_device
from nova import config
from nova.openstack.common import log as logging
from nova.virt import driver
from nova.virt.hyperv import vmutils
# Check needed for unit testing on Unix
if sys.platform == 'win32':
import _winreg
LOG = logging.getLogger(__name__)
CONF = config.CONF
class VolumeUtils(object):
def execute(self, *args, **kwargs):
proc = subprocess.Popen(
[args],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
)
stdout_value, stderr_value = proc.communicate()
if stdout_value.find('The operation completed successfully') == -1:
raise vmutils.HyperVException(_('An error has occurred when '
'calling the iscsi initiator: %s') % stdout_value)
def get_iscsi_initiator(self, cim_conn):
"""Get iscsi initiator name for this machine"""
computer_system = cim_conn.Win32_ComputerSystem()[0]
hostname = computer_system.name
keypath = \
r"SOFTWARE\Microsoft\Windows NT\CurrentVersion\iSCSI\Discovery"
try:
key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, keypath, 0,
_winreg.KEY_ALL_ACCESS)
temp = _winreg.QueryValueEx(key, 'DefaultInitiatorName')
initiator_name = str(temp[0])
_winreg.CloseKey(key)
except Exception:
LOG.info(_("The ISCSI initiator name can't be found. "
"Choosing the default one"))
computer_system = cim_conn.Win32_ComputerSystem()[0]
initiator_name = "iqn.1991-05.com.microsoft:" + \
hostname.lower()
return {
'ip': CONF.my_ip,
'initiator': initiator_name,
}
def login_storage_target(self, target_lun, target_iqn, target_portal):
"""Add target portal, list targets and logins to the target"""
separator = target_portal.find(':')
target_address = target_portal[:separator]
target_port = target_portal[separator + 1:]
#Adding target portal to iscsi initiator. Sending targets
self.execute('iscsicli.exe ' + 'AddTargetPortal ' +
target_address + ' ' + target_port +
' * * * * * * * * * * * * *')
#Listing targets
self.execute('iscsicli.exe ' + 'LisTargets')
#Sending login
self.execute('iscsicli.exe ' + 'qlogintarget ' + target_iqn)
#Waiting the disk to be mounted. Research this
time.sleep(CONF.hyperv_wait_between_attach_retry)
def logout_storage_target(self, _conn_wmi, target_iqn):
""" Logs out storage target through its session id """
sessions = _conn_wmi.query(
"SELECT * FROM MSiSCSIInitiator_SessionClass \
WHERE TargetName='" + target_iqn + "'")
for session in sessions:
self.execute_log_out(session.SessionId)
def execute_log_out(self, session_id):
""" Executes log out of the session described by its session ID """
self.execute('iscsicli.exe ' + 'logouttarget ' + session_id)
def volume_in_mapping(self, mount_device, block_device_info):
block_device_list = [block_device.strip_dev(vol['mount_device'])
for vol in
driver.block_device_info_get_mapping(
block_device_info)]
swap = driver.block_device_info_get_swap(block_device_info)
if driver.swap_is_usable(swap):
block_device_list.append(
block_device.strip_dev(swap['device_name']))
block_device_list += [block_device.strip_dev(
ephemeral['device_name'])
for ephemeral in
driver.block_device_info_get_ephemerals(block_device_info)]
LOG.debug(_("block_device_list %s"), block_device_list)
return block_device.strip_dev(mount_device) in block_device_list
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