931 lines
39 KiB
Python
931 lines
39 KiB
Python
# Copyright 2013 OpenStack Foundation.
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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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import os
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import socket
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import time
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from oslo.concurrency import lockutils
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from oslo.concurrency import processutils as putils
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from cinder.brick import exception
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from cinder.brick import executor
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from cinder.brick.initiator import host_driver
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from cinder.brick.initiator import linuxfc
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from cinder.brick.initiator import linuxscsi
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from cinder.brick.remotefs import remotefs
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from cinder.i18n import _, _LE, _LW
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from cinder.openstack.common import log as logging
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from cinder.openstack.common import loopingcall
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LOG = logging.getLogger(__name__)
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synchronized = lockutils.synchronized_with_prefix('brick-')
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DEVICE_SCAN_ATTEMPTS_DEFAULT = 3
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def get_connector_properties(root_helper, my_ip):
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"""Get the connection properties for all protocols."""
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iscsi = ISCSIConnector(root_helper=root_helper)
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fc = linuxfc.LinuxFibreChannel(root_helper=root_helper)
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props = {}
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props['ip'] = my_ip
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props['host'] = socket.gethostname()
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initiator = iscsi.get_initiator()
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if initiator:
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props['initiator'] = initiator
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wwpns = fc.get_fc_wwpns()
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if wwpns:
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props['wwpns'] = wwpns
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wwnns = fc.get_fc_wwnns()
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if wwnns:
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props['wwnns'] = wwnns
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return props
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class InitiatorConnector(executor.Executor):
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def __init__(self, root_helper, driver=None,
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execute=putils.execute,
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device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
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*args, **kwargs):
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super(InitiatorConnector, self).__init__(root_helper, execute=execute,
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*args, **kwargs)
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if not driver:
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driver = host_driver.HostDriver()
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self.set_driver(driver)
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self.device_scan_attempts = device_scan_attempts
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def set_driver(self, driver):
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"""The driver is used to find used LUNs."""
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self.driver = driver
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@staticmethod
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def factory(protocol, root_helper, driver=None,
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execute=putils.execute, use_multipath=False,
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device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
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*args, **kwargs):
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"""Build a Connector object based upon protocol."""
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LOG.debug("Factory for %s" % protocol)
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protocol = protocol.upper()
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if protocol == "ISCSI":
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return ISCSIConnector(root_helper=root_helper,
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driver=driver,
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execute=execute,
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use_multipath=use_multipath,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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elif protocol == "ISER":
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return ISERConnector(root_helper=root_helper,
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driver=driver,
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execute=execute,
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use_multipath=use_multipath,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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elif protocol == "FIBRE_CHANNEL":
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return FibreChannelConnector(root_helper=root_helper,
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driver=driver,
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execute=execute,
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use_multipath=use_multipath,
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device_scan_attempts=
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device_scan_attempts,
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*args, **kwargs)
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elif protocol == "AOE":
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return AoEConnector(root_helper=root_helper,
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driver=driver,
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execute=execute,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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elif protocol == "NFS" or protocol == "GLUSTERFS":
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return RemoteFsConnector(mount_type=protocol.lower(),
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root_helper=root_helper,
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driver=driver,
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execute=execute,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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elif protocol == "LOCAL":
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return LocalConnector(root_helper=root_helper,
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driver=driver,
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execute=execute,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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else:
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msg = (_("Invalid InitiatorConnector protocol "
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"specified %(protocol)s") %
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dict(protocol=protocol))
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raise ValueError(msg)
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def check_valid_device(self, path, run_as_root=True):
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cmd = ('dd', 'if=%(path)s' % {"path": path},
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'of=/dev/null', 'count=1')
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out, info = None, None
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try:
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out, info = self._execute(*cmd, run_as_root=run_as_root,
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root_helper=self._root_helper)
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except putils.ProcessExecutionError as e:
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LOG.error(_LE("Failed to access the device on the path "
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"%(path)s: %(error)s %(info)s.") %
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{"path": path, "error": e.stderr,
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"info": info})
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return False
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# If the info is none, the path does not exist.
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if info is None:
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return False
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return True
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def connect_volume(self, connection_properties):
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"""Connect to a volume.
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The connection_properties describes the information needed by
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the specific protocol to use to make the connection.
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"""
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raise NotImplementedError()
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def disconnect_volume(self, connection_properties, device_info):
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"""Disconnect a volume from the local host.
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The connection_properties are the same as from connect_volume.
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The device_info is returned from connect_volume.
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"""
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raise NotImplementedError()
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class ISCSIConnector(InitiatorConnector):
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"""Connector class to attach/detach iSCSI volumes."""
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def __init__(self, root_helper, driver=None,
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execute=putils.execute, use_multipath=False,
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device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
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*args, **kwargs):
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self._linuxscsi = linuxscsi.LinuxSCSI(root_helper, execute)
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super(ISCSIConnector, self).__init__(root_helper, driver=driver,
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execute=execute,
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device_scan_attempts=
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device_scan_attempts,
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*args, **kwargs)
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self.use_multipath = use_multipath
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def set_execute(self, execute):
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super(ISCSIConnector, self).set_execute(execute)
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self._linuxscsi.set_execute(execute)
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@synchronized('connect_volume')
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def connect_volume(self, connection_properties):
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"""Attach the volume to instance_name.
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connection_properties for iSCSI must include:
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target_portal - ip and optional port
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target_iqn - iSCSI Qualified Name
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target_lun - LUN id of the volume
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"""
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device_info = {'type': 'block'}
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if self.use_multipath:
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#multipath installed, discovering other targets if available
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target_portal = connection_properties['target_portal']
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out = self._run_iscsiadm_bare(['-m',
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'discovery',
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'-t',
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'sendtargets',
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'-p',
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target_portal],
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check_exit_code=[0, 255])[0] \
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or ""
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for ip, iqn in self._get_target_portals_from_iscsiadm_output(out):
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props = connection_properties.copy()
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props['target_portal'] = ip
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props['target_iqn'] = iqn
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self._connect_to_iscsi_portal(props)
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self._rescan_iscsi()
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else:
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self._connect_to_iscsi_portal(connection_properties)
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host_device = self._get_device_path(connection_properties)
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# The /dev/disk/by-path/... node is not always present immediately
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# TODO(justinsb): This retry-with-delay is a pattern, move to utils?
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tries = 0
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while not os.path.exists(host_device):
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if tries >= self.device_scan_attempts:
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raise exception.VolumeDeviceNotFound(device=host_device)
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LOG.warn(_LW("ISCSI volume not yet found at: %(host_device)s. "
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"Will rescan & retry. Try number: %(tries)s"),
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{'host_device': host_device,
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'tries': tries})
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# The rescan isn't documented as being necessary(?), but it helps
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self._run_iscsiadm(connection_properties, ("--rescan",))
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tries = tries + 1
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if not os.path.exists(host_device):
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time.sleep(tries ** 2)
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if tries != 0:
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LOG.debug("Found iSCSI node %(host_device)s "
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"(after %(tries)s rescans)",
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{'host_device': host_device, 'tries': tries})
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if self.use_multipath:
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#we use the multipath device instead of the single path device
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self._rescan_multipath()
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multipath_device = self._get_multipath_device_name(host_device)
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if multipath_device is not None:
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host_device = multipath_device
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device_info['path'] = host_device
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return device_info
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@synchronized('connect_volume')
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def disconnect_volume(self, connection_properties, device_info):
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"""Detach the volume from instance_name.
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connection_properties for iSCSI must include:
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target_portal - IP and optional port
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target_iqn - iSCSI Qualified Name
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target_lun - LUN id of the volume
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"""
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# Moved _rescan_iscsi and _rescan_multipath
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# from _disconnect_volume_multipath_iscsi to here.
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# Otherwise, if we do rescan after _linuxscsi.remove_multipath_device
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# but before logging out, the removed devices under /dev/disk/by-path
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# will reappear after rescan.
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self._rescan_iscsi()
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host_device = self._get_device_path(connection_properties)
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multipath_device = None
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if self.use_multipath:
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self._rescan_multipath()
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multipath_device = self._get_multipath_device_name(host_device)
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if multipath_device:
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device_realpath = os.path.realpath(host_device)
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self._linuxscsi.remove_multipath_device(device_realpath)
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return self._disconnect_volume_multipath_iscsi(
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connection_properties, multipath_device)
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# remove the device from the scsi subsystem
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# this eliminates any stale entries until logout
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dev_name = self._linuxscsi.get_name_from_path(host_device)
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if dev_name:
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self._linuxscsi.remove_scsi_device(dev_name)
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# NOTE(vish): Only disconnect from the target if no luns from the
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# target are in use.
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device_prefix = ("/dev/disk/by-path/ip-%(portal)s-iscsi-%(iqn)s-lun-" %
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{'portal': connection_properties['target_portal'],
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'iqn': connection_properties['target_iqn']})
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devices = self.driver.get_all_block_devices()
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devices = [dev for dev in devices if dev.startswith(device_prefix)
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and os.path.exists(dev)]
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if not devices:
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self._disconnect_from_iscsi_portal(connection_properties)
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def _get_device_path(self, connection_properties):
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path = ("/dev/disk/by-path/ip-%(portal)s-iscsi-%(iqn)s-lun-%(lun)s" %
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{'portal': connection_properties['target_portal'],
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'iqn': connection_properties['target_iqn'],
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'lun': connection_properties.get('target_lun', 0)})
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return path
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def get_initiator(self):
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"""Secure helper to read file as root."""
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file_path = '/etc/iscsi/initiatorname.iscsi'
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try:
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lines, _err = self._execute('cat', file_path, run_as_root=True,
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root_helper=self._root_helper)
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for l in lines.split('\n'):
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if l.startswith('InitiatorName='):
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return l[l.index('=') + 1:].strip()
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except putils.ProcessExecutionError:
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msg = (_("Could not find the iSCSI Initiator File %s")
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% file_path)
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LOG.warn(msg)
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return None
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def _run_iscsiadm(self, connection_properties, iscsi_command, **kwargs):
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check_exit_code = kwargs.pop('check_exit_code', 0)
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(out, err) = self._execute('iscsiadm', '-m', 'node', '-T',
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connection_properties['target_iqn'],
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'-p',
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connection_properties['target_portal'],
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*iscsi_command, run_as_root=True,
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root_helper=self._root_helper,
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check_exit_code=check_exit_code)
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LOG.debug("iscsiadm %s: stdout=%s stderr=%s" %
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(iscsi_command, out, err))
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return (out, err)
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def _iscsiadm_update(self, connection_properties, property_key,
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property_value, **kwargs):
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iscsi_command = ('--op', 'update', '-n', property_key,
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'-v', property_value)
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return self._run_iscsiadm(connection_properties, iscsi_command,
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**kwargs)
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def _get_target_portals_from_iscsiadm_output(self, output):
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# return both portals and iqns
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return [line.split() for line in output.splitlines()]
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def _disconnect_volume_multipath_iscsi(self, connection_properties,
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multipath_name):
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"""This removes a multipath device and it's LUNs."""
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LOG.debug("Disconnect multipath device %s" % multipath_name)
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block_devices = self.driver.get_all_block_devices()
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devices = []
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for dev in block_devices:
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if os.path.exists(dev):
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if "/mapper/" in dev:
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devices.append(dev)
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else:
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mpdev = self._get_multipath_device_name(dev)
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if mpdev:
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devices.append(mpdev)
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# Do a discovery to find all targets.
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# Targets for multiple paths for the same multipath device
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# may not be the same.
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out = self._run_iscsiadm_bare(['-m',
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'discovery',
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'-t',
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'sendtargets',
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'-p',
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connection_properties['target_portal']],
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check_exit_code=[0, 255])[0] \
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or ""
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ips_iqns = self._get_target_portals_from_iscsiadm_output(out)
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if not devices:
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# disconnect if no other multipath devices
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self._disconnect_mpath(connection_properties, ips_iqns)
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return
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# Get a target for all other multipath devices
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other_iqns = [self._get_multipath_iqn(device)
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for device in devices]
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# Get all the targets for the current multipath device
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current_iqns = [iqn for ip, iqn in ips_iqns]
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in_use = False
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for current in current_iqns:
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if current in other_iqns:
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in_use = True
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break
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# If no other multipath device attached has the same iqn
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# as the current device
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if not in_use:
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# disconnect if no other multipath devices with same iqn
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self._disconnect_mpath(connection_properties, ips_iqns)
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return
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# else do not disconnect iscsi portals,
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# as they are used for other luns
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return
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def _connect_to_iscsi_portal(self, connection_properties):
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# NOTE(vish): If we are on the same host as nova volume, the
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# discovery makes the target so we don't need to
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# run --op new. Therefore, we check to see if the
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# target exists, and if we get 255 (Not Found), then
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# we run --op new. This will also happen if another
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# volume is using the same target.
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try:
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self._run_iscsiadm(connection_properties, ())
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except putils.ProcessExecutionError as exc:
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# iscsiadm returns 21 for "No records found" after version 2.0-871
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if exc.exit_code in [21, 255]:
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self._run_iscsiadm(connection_properties, ('--op', 'new'))
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else:
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raise
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if connection_properties.get('auth_method'):
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self._iscsiadm_update(connection_properties,
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"node.session.auth.authmethod",
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connection_properties['auth_method'])
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self._iscsiadm_update(connection_properties,
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"node.session.auth.username",
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connection_properties['auth_username'])
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self._iscsiadm_update(connection_properties,
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"node.session.auth.password",
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connection_properties['auth_password'])
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#duplicate logins crash iscsiadm after load,
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#so we scan active sessions to see if the node is logged in.
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out = self._run_iscsiadm_bare(["-m", "session"],
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run_as_root=True,
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check_exit_code=[0, 1, 21])[0] or ""
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portals = [{'portal': p.split(" ")[2], 'iqn': p.split(" ")[3]}
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for p in out.splitlines() if p.startswith("tcp:")]
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stripped_portal = connection_properties['target_portal'].split(",")[0]
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if len(portals) == 0 or len([s for s in portals
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if stripped_portal ==
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s['portal'].split(",")[0]
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and
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s['iqn'] ==
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connection_properties['target_iqn']]
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) == 0:
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try:
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self._run_iscsiadm(connection_properties,
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("--login",),
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check_exit_code=[0, 255])
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except putils.ProcessExecutionError as err:
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#as this might be one of many paths,
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#only set successful logins to startup automatically
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if err.exit_code in [15]:
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self._iscsiadm_update(connection_properties,
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"node.startup",
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"automatic")
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return
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self._iscsiadm_update(connection_properties,
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"node.startup",
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"automatic")
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def _disconnect_from_iscsi_portal(self, connection_properties):
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self._iscsiadm_update(connection_properties, "node.startup", "manual",
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check_exit_code=[0, 21, 255])
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self._run_iscsiadm(connection_properties, ("--logout",),
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check_exit_code=[0, 21, 255])
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self._run_iscsiadm(connection_properties, ('--op', 'delete'),
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check_exit_code=[0, 21, 255])
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def _get_multipath_device_name(self, single_path_device):
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device = os.path.realpath(single_path_device)
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out = self._run_multipath(['-ll',
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device],
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check_exit_code=[0, 1])[0]
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mpath_line = [line for line in out.splitlines()
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if "scsi_id" not in line] # ignore udev errors
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if len(mpath_line) > 0 and len(mpath_line[0]) > 0:
|
|
return "/dev/mapper/%s" % mpath_line[0].split(" ")[0]
|
|
|
|
return None
|
|
|
|
def _get_iscsi_devices(self):
|
|
try:
|
|
devices = list(os.walk('/dev/disk/by-path'))[0][-1]
|
|
except IndexError:
|
|
return []
|
|
return [entry for entry in devices if entry.startswith("ip-")]
|
|
|
|
def _disconnect_mpath(self, connection_properties, ips_iqns):
|
|
for ip, iqn in ips_iqns:
|
|
props = connection_properties.copy()
|
|
props['target_portal'] = ip
|
|
props['target_iqn'] = iqn
|
|
self._disconnect_from_iscsi_portal(props)
|
|
|
|
self._rescan_multipath()
|
|
|
|
def _get_multipath_iqn(self, multipath_device):
|
|
entries = self._get_iscsi_devices()
|
|
for entry in entries:
|
|
entry_real_path = os.path.realpath("/dev/disk/by-path/%s" % entry)
|
|
entry_multipath = self._get_multipath_device_name(entry_real_path)
|
|
if entry_multipath == multipath_device:
|
|
return entry.split("iscsi-")[1].split("-lun")[0]
|
|
return None
|
|
|
|
def _run_iscsiadm_bare(self, iscsi_command, **kwargs):
|
|
check_exit_code = kwargs.pop('check_exit_code', 0)
|
|
(out, err) = self._execute('iscsiadm',
|
|
*iscsi_command,
|
|
run_as_root=True,
|
|
root_helper=self._root_helper,
|
|
check_exit_code=check_exit_code)
|
|
LOG.debug("iscsiadm %s: stdout=%s stderr=%s" %
|
|
(iscsi_command, out, err))
|
|
return (out, err)
|
|
|
|
def _run_multipath(self, multipath_command, **kwargs):
|
|
check_exit_code = kwargs.pop('check_exit_code', 0)
|
|
(out, err) = self._execute('multipath',
|
|
*multipath_command,
|
|
run_as_root=True,
|
|
root_helper=self._root_helper,
|
|
check_exit_code=check_exit_code)
|
|
LOG.debug("multipath %s: stdout=%s stderr=%s" %
|
|
(multipath_command, out, err))
|
|
return (out, err)
|
|
|
|
def _rescan_iscsi(self):
|
|
self._run_iscsiadm_bare(('-m', 'node', '--rescan'),
|
|
check_exit_code=[0, 1, 21, 255])
|
|
self._run_iscsiadm_bare(('-m', 'session', '--rescan'),
|
|
check_exit_code=[0, 1, 21, 255])
|
|
|
|
def _rescan_multipath(self):
|
|
self._run_multipath('-r', check_exit_code=[0, 1, 21])
|
|
|
|
|
|
class ISERConnector(ISCSIConnector):
|
|
|
|
def _get_device_path(self, iser_properties):
|
|
return ("/dev/disk/by-path/ip-%s-iser-%s-lun-%s" %
|
|
(iser_properties['target_portal'],
|
|
iser_properties['target_iqn'],
|
|
iser_properties.get('target_lun', 0)))
|
|
|
|
|
|
class FibreChannelConnector(InitiatorConnector):
|
|
"""Connector class to attach/detach Fibre Channel volumes."""
|
|
|
|
def __init__(self, root_helper, driver=None,
|
|
execute=putils.execute, use_multipath=False,
|
|
device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
|
|
*args, **kwargs):
|
|
self._linuxscsi = linuxscsi.LinuxSCSI(root_helper, execute)
|
|
self._linuxfc = linuxfc.LinuxFibreChannel(root_helper, execute)
|
|
super(FibreChannelConnector, self).__init__(root_helper, driver=driver,
|
|
execute=execute,
|
|
device_scan_attempts=
|
|
device_scan_attempts,
|
|
*args, **kwargs)
|
|
self.use_multipath = use_multipath
|
|
|
|
def set_execute(self, execute):
|
|
super(FibreChannelConnector, self).set_execute(execute)
|
|
self._linuxscsi.set_execute(execute)
|
|
self._linuxfc.set_execute(execute)
|
|
|
|
@synchronized('connect_volume')
|
|
def connect_volume(self, connection_properties):
|
|
"""Attach the volume to instance_name.
|
|
|
|
connection_properties for Fibre Channel must include:
|
|
target_portal - ip and optional port
|
|
target_iqn - iSCSI Qualified Name
|
|
target_lun - LUN id of the volume
|
|
"""
|
|
LOG.debug("execute = %s" % self._execute)
|
|
device_info = {'type': 'block'}
|
|
|
|
ports = connection_properties['target_wwn']
|
|
wwns = []
|
|
# we support a list of wwns or a single wwn
|
|
if isinstance(ports, list):
|
|
for wwn in ports:
|
|
wwns.append(str(wwn))
|
|
elif isinstance(ports, basestring):
|
|
wwns.append(str(ports))
|
|
|
|
# We need to look for wwns on every hba
|
|
# because we don't know ahead of time
|
|
# where they will show up.
|
|
hbas = self._linuxfc.get_fc_hbas_info()
|
|
host_devices = []
|
|
for hba in hbas:
|
|
pci_num = self._get_pci_num(hba)
|
|
if pci_num is not None:
|
|
for wwn in wwns:
|
|
target_wwn = "0x%s" % wwn.lower()
|
|
host_device = ("/dev/disk/by-path/pci-%s-fc-%s-lun-%s" %
|
|
(pci_num,
|
|
target_wwn,
|
|
connection_properties.get(
|
|
'target_lun', 0)))
|
|
host_devices.append(host_device)
|
|
|
|
if len(host_devices) == 0:
|
|
# this is empty because we don't have any FC HBAs
|
|
msg = _("We are unable to locate any Fibre Channel devices")
|
|
LOG.warn(msg)
|
|
raise exception.NoFibreChannelHostsFound()
|
|
|
|
# The /dev/disk/by-path/... node is not always present immediately
|
|
# We only need to find the first device. Once we see the first device
|
|
# multipath will have any others.
|
|
def _wait_for_device_discovery(host_devices):
|
|
tries = self.tries
|
|
for device in host_devices:
|
|
LOG.debug("Looking for Fibre Channel dev %(device)s",
|
|
{'device': device})
|
|
if os.path.exists(device):
|
|
self.host_device = device
|
|
# get the /dev/sdX device. This is used
|
|
# to find the multipath device.
|
|
self.device_name = os.path.realpath(device)
|
|
raise loopingcall.LoopingCallDone()
|
|
|
|
if self.tries >= self.device_scan_attempts:
|
|
msg = _("Fibre Channel volume device not found.")
|
|
LOG.error(msg)
|
|
raise exception.NoFibreChannelVolumeDeviceFound()
|
|
|
|
LOG.warn(_LW("Fibre volume not yet found. "
|
|
"Will rescan & retry. Try number: %(tries)s"),
|
|
{'tries': tries})
|
|
|
|
self._linuxfc.rescan_hosts(hbas)
|
|
self.tries = self.tries + 1
|
|
|
|
self.host_device = None
|
|
self.device_name = None
|
|
self.tries = 0
|
|
timer = loopingcall.FixedIntervalLoopingCall(
|
|
_wait_for_device_discovery, host_devices)
|
|
timer.start(interval=2).wait()
|
|
|
|
tries = self.tries
|
|
if self.host_device is not None and self.device_name is not None:
|
|
LOG.debug("Found Fibre Channel volume %(name)s "
|
|
"(after %(tries)s rescans)",
|
|
{'name': self.device_name, 'tries': tries})
|
|
|
|
# see if the new drive is part of a multipath
|
|
# device. If so, we'll use the multipath device.
|
|
if self.use_multipath:
|
|
mdev_info = self._linuxscsi.find_multipath_device(self.device_name)
|
|
if mdev_info is not None:
|
|
LOG.debug("Multipath device discovered %(device)s"
|
|
% {'device': mdev_info['device']})
|
|
device_path = mdev_info['device']
|
|
devices = mdev_info['devices']
|
|
device_info['multipath_id'] = mdev_info['id']
|
|
else:
|
|
# we didn't find a multipath device.
|
|
# so we assume the kernel only sees 1 device
|
|
device_path = self.host_device
|
|
dev_info = self._linuxscsi.get_device_info(self.device_name)
|
|
devices = [dev_info]
|
|
else:
|
|
device_path = self.host_device
|
|
dev_info = self._linuxscsi.get_device_info(self.device_name)
|
|
devices = [dev_info]
|
|
|
|
device_info['path'] = device_path
|
|
device_info['devices'] = devices
|
|
return device_info
|
|
|
|
@synchronized('connect_volume')
|
|
def disconnect_volume(self, connection_properties, device_info):
|
|
"""Detach the volume from instance_name.
|
|
|
|
connection_properties for Fibre Channel must include:
|
|
target_wwn - iSCSI Qualified Name
|
|
target_lun - LUN id of the volume
|
|
"""
|
|
devices = device_info['devices']
|
|
|
|
# If this is a multipath device, we need to search again
|
|
# and make sure we remove all the devices. Some of them
|
|
# might not have shown up at attach time.
|
|
if self.use_multipath and 'multipath_id' in device_info:
|
|
multipath_id = device_info['multipath_id']
|
|
mdev_info = self._linuxscsi.find_multipath_device(multipath_id)
|
|
devices = mdev_info['devices']
|
|
LOG.debug("devices to remove = %s" % devices)
|
|
self._linuxscsi.flush_multipath_device(multipath_id)
|
|
|
|
# There may have been more than 1 device mounted
|
|
# by the kernel for this volume. We have to remove
|
|
# all of them
|
|
for device in devices:
|
|
self._linuxscsi.remove_scsi_device(device["device"])
|
|
|
|
def _get_pci_num(self, hba):
|
|
# NOTE(walter-boring)
|
|
# device path is in format of
|
|
# /sys/devices/pci0000:00/0000:00:03.0/0000:05:00.3/host2/fc_host/host2
|
|
# sometimes an extra entry exists before the host2 value
|
|
# we always want the value prior to the host2 value
|
|
pci_num = None
|
|
if hba is not None:
|
|
if "device_path" in hba:
|
|
index = 0
|
|
device_path = hba['device_path'].split('/')
|
|
for value in device_path:
|
|
if value.startswith('host'):
|
|
break
|
|
index = index + 1
|
|
|
|
if index > 0:
|
|
pci_num = device_path[index - 1]
|
|
|
|
return pci_num
|
|
|
|
|
|
class AoEConnector(InitiatorConnector):
|
|
"""Connector class to attach/detach AoE volumes."""
|
|
def __init__(self, root_helper, driver=None,
|
|
execute=putils.execute,
|
|
device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
|
|
*args, **kwargs):
|
|
super(AoEConnector, self).__init__(root_helper, driver=driver,
|
|
execute=execute,
|
|
device_scan_attempts=
|
|
device_scan_attempts,
|
|
*args, **kwargs)
|
|
|
|
def _get_aoe_info(self, connection_properties):
|
|
shelf = connection_properties['target_shelf']
|
|
lun = connection_properties['target_lun']
|
|
aoe_device = 'e%(shelf)s.%(lun)s' % {'shelf': shelf,
|
|
'lun': lun}
|
|
aoe_path = '/dev/etherd/%s' % (aoe_device)
|
|
return aoe_device, aoe_path
|
|
|
|
@lockutils.synchronized('aoe_control', 'aoe-')
|
|
def connect_volume(self, connection_properties):
|
|
"""Discover and attach the volume.
|
|
|
|
connection_properties for AoE must include:
|
|
target_shelf - shelf id of volume
|
|
target_lun - lun id of volume
|
|
"""
|
|
aoe_device, aoe_path = self._get_aoe_info(connection_properties)
|
|
|
|
device_info = {
|
|
'type': 'block',
|
|
'device': aoe_device,
|
|
'path': aoe_path,
|
|
}
|
|
|
|
if os.path.exists(aoe_path):
|
|
self._aoe_revalidate(aoe_device)
|
|
else:
|
|
self._aoe_discover()
|
|
|
|
waiting_status = {'tries': 0}
|
|
|
|
#NOTE(jbr_): Device path is not always present immediately
|
|
def _wait_for_discovery(aoe_path):
|
|
if os.path.exists(aoe_path):
|
|
raise loopingcall.LoopingCallDone
|
|
|
|
if waiting_status['tries'] >= self.device_scan_attempts:
|
|
raise exception.VolumeDeviceNotFound(device=aoe_path)
|
|
|
|
LOG.warn(_LW("AoE volume not yet found at: %(path)s. "
|
|
"Try number: %(tries)s"),
|
|
{'path': aoe_device,
|
|
'tries': waiting_status['tries']})
|
|
|
|
self._aoe_discover()
|
|
waiting_status['tries'] += 1
|
|
|
|
timer = loopingcall.FixedIntervalLoopingCall(_wait_for_discovery,
|
|
aoe_path)
|
|
timer.start(interval=2).wait()
|
|
|
|
if waiting_status['tries']:
|
|
LOG.debug("Found AoE device %(path)s "
|
|
"(after %(tries)s rediscover)",
|
|
{'path': aoe_path,
|
|
'tries': waiting_status['tries']})
|
|
|
|
return device_info
|
|
|
|
@lockutils.synchronized('aoe_control', 'aoe-')
|
|
def disconnect_volume(self, connection_properties, device_info):
|
|
"""Detach and flush the volume.
|
|
|
|
connection_properties for AoE must include:
|
|
target_shelf - shelf id of volume
|
|
target_lun - lun id of volume
|
|
"""
|
|
aoe_device, aoe_path = self._get_aoe_info(connection_properties)
|
|
|
|
if os.path.exists(aoe_path):
|
|
self._aoe_flush(aoe_device)
|
|
|
|
def _aoe_discover(self):
|
|
(out, err) = self._execute('aoe-discover',
|
|
run_as_root=True,
|
|
root_helper=self._root_helper,
|
|
check_exit_code=0)
|
|
|
|
LOG.debug('aoe-discover: stdout=%(out)s stderr%(err)s' %
|
|
{'out': out, 'err': err})
|
|
|
|
def _aoe_revalidate(self, aoe_device):
|
|
(out, err) = self._execute('aoe-revalidate',
|
|
aoe_device,
|
|
run_as_root=True,
|
|
root_helper=self._root_helper,
|
|
check_exit_code=0)
|
|
|
|
LOG.debug('aoe-revalidate %(dev)s: stdout=%(out)s stderr%(err)s' %
|
|
{'dev': aoe_device, 'out': out, 'err': err})
|
|
|
|
def _aoe_flush(self, aoe_device):
|
|
(out, err) = self._execute('aoe-flush',
|
|
aoe_device,
|
|
run_as_root=True,
|
|
root_helper=self._root_helper,
|
|
check_exit_code=0)
|
|
LOG.debug('aoe-flush %(dev)s: stdout=%(out)s stderr%(err)s' %
|
|
{'dev': aoe_device, 'out': out, 'err': err})
|
|
|
|
|
|
class RemoteFsConnector(InitiatorConnector):
|
|
"""Connector class to attach/detach NFS and GlusterFS volumes."""
|
|
|
|
def __init__(self, mount_type, root_helper, driver=None,
|
|
execute=putils.execute,
|
|
device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
|
|
*args, **kwargs):
|
|
kwargs = kwargs or {}
|
|
conn = kwargs.get('conn')
|
|
if conn:
|
|
mount_point_base = conn.get('mount_point_base')
|
|
if mount_type.lower() == 'nfs':
|
|
kwargs['nfs_mount_point_base'] =\
|
|
kwargs.get('nfs_mount_point_base') or\
|
|
mount_point_base
|
|
elif mount_type.lower() == 'glusterfs':
|
|
kwargs['glusterfs_mount_point_base'] =\
|
|
kwargs.get('glusterfs_mount_point_base') or\
|
|
mount_point_base
|
|
else:
|
|
LOG.warn(_LW("Connection details not present."
|
|
" RemoteFsClient may not initialize properly."))
|
|
self._remotefsclient = remotefs.RemoteFsClient(mount_type, root_helper,
|
|
execute=execute,
|
|
*args, **kwargs)
|
|
super(RemoteFsConnector, self).__init__(root_helper, driver=driver,
|
|
execute=execute,
|
|
device_scan_attempts=
|
|
device_scan_attempts,
|
|
*args, **kwargs)
|
|
|
|
def set_execute(self, execute):
|
|
super(RemoteFsConnector, self).set_execute(execute)
|
|
self._remotefsclient.set_execute(execute)
|
|
|
|
def connect_volume(self, connection_properties):
|
|
"""Ensure that the filesystem containing the volume is mounted.
|
|
|
|
connection_properties must include:
|
|
export - remote filesystem device (e.g. '172.18.194.100:/var/nfs')
|
|
name - file name within the filesystem
|
|
|
|
connection_properties may optionally include:
|
|
options - options to pass to mount
|
|
"""
|
|
|
|
mnt_flags = []
|
|
if connection_properties.get('options'):
|
|
mnt_flags = connection_properties['options'].split()
|
|
|
|
nfs_share = connection_properties['export']
|
|
self._remotefsclient.mount(nfs_share, mnt_flags)
|
|
mount_point = self._remotefsclient.get_mount_point(nfs_share)
|
|
|
|
path = mount_point + '/' + connection_properties['name']
|
|
|
|
return {'path': path}
|
|
|
|
def disconnect_volume(self, connection_properties, device_info):
|
|
"""No need to do anything to disconnect a volume in a filesystem."""
|
|
|
|
|
|
class LocalConnector(InitiatorConnector):
|
|
""""Connector class to attach/detach File System backed volumes."""
|
|
|
|
def __init__(self, root_helper, driver=None, execute=putils.execute,
|
|
*args, **kwargs):
|
|
super(LocalConnector, self).__init__(root_helper, driver=driver,
|
|
execute=execute, *args, **kwargs)
|
|
|
|
def connect_volume(self, connection_properties):
|
|
"""Connect to a volume.
|
|
|
|
connection_properties must include:
|
|
device_path - path to the volume to be connected
|
|
"""
|
|
if 'device_path' not in connection_properties:
|
|
msg = (_("Invalid connection_properties specified "
|
|
"no device_path attribute"))
|
|
raise ValueError(msg)
|
|
|
|
device_info = {'type': 'local',
|
|
'path': connection_properties['device_path']}
|
|
return device_info
|
|
|
|
def disconnect_volume(self, connection_properties, device_info):
|
|
"""Disconnect a volume from the local host."""
|
|
pass
|