133 lines
5.1 KiB
Python
133 lines
5.1 KiB
Python
# Copyright 2012 Pedro Navarro Perez
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# Copyright 2013 Cloudbase Solutions Srl
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Helper methods for operations related to the management of volumes
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and storage repositories on Windows Server 2012 and above
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"""
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import sys
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import time
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if sys.platform == 'win32':
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import wmi
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from oslo_config import cfg
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from oslo_log import log as logging
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from six.moves import range
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from nova.i18n import _
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from nova import utils
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from nova.virt.hyperv import basevolumeutils
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from nova.virt.hyperv import vmutils
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class VolumeUtilsV2(basevolumeutils.BaseVolumeUtils):
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_CHAP_AUTH_TYPE = 'ONEWAYCHAP'
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def __init__(self, host='.'):
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super(VolumeUtilsV2, self).__init__(host)
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storage_namespace = '//%s/root/microsoft/windows/storage' % host
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if sys.platform == 'win32':
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self._conn_storage = wmi.WMI(moniker=storage_namespace)
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def _login_target_portal(self, target_portal):
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(target_address,
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target_port) = utils.parse_server_string(target_portal)
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# Checking if the portal is already connected.
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portal = self._conn_storage.query("SELECT * FROM "
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"MSFT_iSCSITargetPortal "
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"WHERE TargetPortalAddress='%s' "
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"AND TargetPortalPortNumber='%s'"
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% (target_address, target_port))
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if portal:
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portal[0].Update()
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else:
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# Adding target portal to iscsi initiator. Sending targets
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portal = self._conn_storage.MSFT_iSCSITargetPortal
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portal.New(TargetPortalAddress=target_address,
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TargetPortalPortNumber=target_port)
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def login_storage_target(self, target_lun, target_iqn, target_portal,
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auth_username=None, auth_password=None):
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"""Ensure that the target is logged in."""
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self._login_target_portal(target_portal)
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retry_count = CONF.hyperv.volume_attach_retry_count
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# If the target is not connected, at least two iterations are needed:
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# one for performing the login and another one for checking if the
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# target was logged in successfully.
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if retry_count < 2:
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retry_count = 2
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for attempt in range(retry_count):
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target = self._conn_storage.query("SELECT * FROM MSFT_iSCSITarget "
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"WHERE NodeAddress='%s' " %
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target_iqn)
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if target and target[0].IsConnected:
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if attempt == 0:
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# The target was already connected but an update may be
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# required
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target[0].Update()
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return
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try:
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target = self._conn_storage.MSFT_iSCSITarget
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auth = {}
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if auth_username and auth_password:
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auth['AuthenticationType'] = self._CHAP_AUTH_TYPE
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auth['ChapUsername'] = auth_username
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auth['ChapSecret'] = auth_password
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target.Connect(NodeAddress=target_iqn,
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IsPersistent=True, **auth)
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time.sleep(CONF.hyperv.volume_attach_retry_interval)
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except wmi.x_wmi as exc:
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LOG.debug("Attempt %(attempt)d to connect to target "
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"%(target_iqn)s failed. Retrying. "
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"WMI exception: %(exc)s " %
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{'target_iqn': target_iqn,
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'exc': exc,
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'attempt': attempt})
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raise vmutils.HyperVException(_('Failed to login target %s') %
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target_iqn)
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def logout_storage_target(self, target_iqn):
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"""Logs out storage target through its session id."""
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targets = self._conn_storage.MSFT_iSCSITarget(NodeAddress=target_iqn)
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if targets:
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target = targets[0]
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if target.IsConnected:
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sessions = self._conn_storage.MSFT_iSCSISession(
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TargetNodeAddress=target_iqn)
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for session in sessions:
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if session.IsPersistent:
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session.Unregister()
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target.Disconnect()
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def execute_log_out(self, session_id):
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sessions = self._conn_wmi.MSiSCSIInitiator_SessionClass(
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SessionId=session_id)
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if sessions:
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self.logout_storage_target(sessions[0].TargetName)
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