/usr/lib/python3/dist-packages/os_win/utils/storage/initiator/iscsi_wmi_utils.py is in python3-os-win 1.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | # 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 on Windows Server 2012 and above
"""
import time
from oslo_config import cfg
from oslo_log import log as logging
from six.moves import range # noqa
from os_win._i18n import _
from os_win import _utils
from os_win import exceptions
from os_win.utils.storage.initiator import base_iscsi_utils
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
class ISCSIInitiatorWMIUtils(base_iscsi_utils.BaseISCSIInitiatorUtils):
_CHAP_AUTH_TYPE = 'ONEWAYCHAP'
def __init__(self, host='.'):
super(ISCSIInitiatorWMIUtils, self).__init__(host)
storage_namespace = '//%s/root/microsoft/windows/storage' % host
self._conn_storage = self._get_wmi_conn(storage_namespace)
def _login_target_portal(self, target_portal):
(target_address,
target_port) = _utils.parse_server_string(target_portal)
# Checking if the portal is already connected.
portal = self._conn_storage.query("SELECT * FROM "
"MSFT_iSCSITargetPortal "
"WHERE TargetPortalAddress='%s' "
"AND TargetPortalPortNumber='%s'"
% (target_address, target_port))
if portal:
portal[0].Update()
else:
# Adding target portal to iscsi initiator. Sending targets
portal = self._conn_storage.MSFT_iSCSITargetPortal
portal.New(TargetPortalAddress=target_address,
TargetPortalPortNumber=target_port)
def login_storage_target(self, target_lun, target_iqn, target_portal,
auth_username=None, auth_password=None):
"""Ensure that the target is logged in."""
self._login_target_portal(target_portal)
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 range(retry_count):
target = self._conn_storage.query("SELECT * FROM MSFT_iSCSITarget "
"WHERE NodeAddress='%s' " %
target_iqn)
if target and target[0].IsConnected:
if attempt == 0:
# The target was already connected but an update may be
# required
target[0].Update()
return
try:
target = self._conn_storage.MSFT_iSCSITarget
auth = {}
if auth_username and auth_password:
auth['AuthenticationType'] = self._CHAP_AUTH_TYPE
auth['ChapUsername'] = auth_username
auth['ChapSecret'] = auth_password
target.Connect(NodeAddress=target_iqn,
IsPersistent=True, **auth)
time.sleep(CONF.hyperv.volume_attach_retry_interval)
except exceptions.x_wmi as exc:
LOG.debug("Attempt %(attempt)d to connect to target "
"%(target_iqn)s failed. Retrying. "
"WMI exception: %(exc)s " %
{'target_iqn': target_iqn,
'exc': exc,
'attempt': attempt})
raise exceptions.HyperVException(_('Failed to login target %s') %
target_iqn)
def logout_storage_target(self, target_iqn):
"""Logs out storage target through its session id."""
targets = self._conn_storage.MSFT_iSCSITarget(NodeAddress=target_iqn)
if targets:
target = targets[0]
if target.IsConnected:
sessions = self._conn_storage.MSFT_iSCSISession(
TargetNodeAddress=target_iqn)
for session in sessions:
if session.IsPersistent:
session.Unregister()
target.Disconnect()
def execute_log_out(self, session_id):
sessions = self._conn_wmi.MSiSCSIInitiator_SessionClass(
SessionId=session_id)
if sessions:
self.logout_storage_target(sessions[0].TargetName)
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