120 lines
4.6 KiB
Python
120 lines
4.6 KiB
Python
# Copyright 2012 Pedro Navarro Perez
|
|
# Copyright 2013 Cloudbase Solutions Srl
|
|
# 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
|
|
|
|
Official Microsoft iSCSI Initiator and iSCSI command line interface
|
|
documentation can be retrieved at:
|
|
http://www.microsoft.com/en-us/download/details.aspx?id=34750
|
|
"""
|
|
|
|
import re
|
|
import time
|
|
|
|
from oslo.config import cfg
|
|
|
|
from nova.i18n import _
|
|
from nova.openstack.common import log as logging
|
|
from nova import utils
|
|
from nova.virt.hyperv import basevolumeutils
|
|
from nova.virt.hyperv import vmutils
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
CONF = cfg.CONF
|
|
|
|
|
|
class VolumeUtils(basevolumeutils.BaseVolumeUtils):
|
|
|
|
def __init__(self):
|
|
super(VolumeUtils, self).__init__()
|
|
|
|
def execute(self, *args, **kwargs):
|
|
stdout_value, stderr_value = utils.execute(*args, **kwargs)
|
|
if stdout_value.find('The operation completed successfully') == -1:
|
|
raise vmutils.HyperVException(_('An error has occurred when '
|
|
'calling the iscsi initiator: %s')
|
|
% stdout_value)
|
|
return stdout_value
|
|
|
|
def _login_target_portal(self, target_portal):
|
|
(target_address,
|
|
target_port) = utils.parse_server_string(target_portal)
|
|
|
|
output = self.execute('iscsicli.exe', 'ListTargetPortals')
|
|
pattern = r'Address and Socket *: (.*)'
|
|
portals = [addr.split() for addr in re.findall(pattern, output)]
|
|
LOG.debug("Ensuring connection to portal: %s" % target_portal)
|
|
if [target_address, str(target_port)] in portals:
|
|
self.execute('iscsicli.exe', 'RefreshTargetPortal',
|
|
target_address, target_port)
|
|
else:
|
|
# Adding target portal to iscsi initiator. Sending targets
|
|
self.execute('iscsicli.exe', 'AddTargetPortal',
|
|
target_address, target_port,
|
|
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
|
|
'*', '*')
|
|
|
|
def login_storage_target(self, target_lun, target_iqn, target_portal):
|
|
"""Ensure that the target is logged in."""
|
|
|
|
self._login_target_portal(target_portal)
|
|
# Listing targets
|
|
self.execute('iscsicli.exe', 'ListTargets')
|
|
|
|
retry_count = CONF.hyperv.volume_attach_retry_count
|
|
|
|
# If the target is not connected, at least two iterations are needed:
|
|
# one for performing the login and another one for checking if the
|
|
# target was logged in successfully.
|
|
if retry_count < 2:
|
|
retry_count = 2
|
|
|
|
for attempt in xrange(retry_count):
|
|
try:
|
|
session_info = self.execute('iscsicli.exe', 'SessionList')
|
|
if session_info.find(target_iqn) == -1:
|
|
# Sending login
|
|
self.execute('iscsicli.exe', 'qlogintarget', target_iqn)
|
|
else:
|
|
return
|
|
except vmutils.HyperVException as exc:
|
|
LOG.debug("Attempt %(attempt)d to connect to target "
|
|
"%(target_iqn)s failed. Retrying. "
|
|
"Exceptipn: %(exc)s ",
|
|
{'target_iqn': target_iqn,
|
|
'exc': exc,
|
|
'attempt': attempt})
|
|
time.sleep(CONF.hyperv.volume_attach_retry_interval)
|
|
|
|
raise vmutils.HyperVException(_('Failed to login target %s') %
|
|
target_iqn)
|
|
|
|
def logout_storage_target(self, target_iqn):
|
|
"""Logs out storage target through its session id."""
|
|
|
|
sessions = self._conn_wmi.query("SELECT * FROM "
|
|
"MSiSCSIInitiator_SessionClass "
|
|
"WHERE TargetName='%s'" % 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)
|