def test_find_multipath_device_3par(self):
def fake_execute(*cmd, **kwargs):
out = ("mpath6 (350002ac20398383d) dm-3 3PARdata,VV\n"
"size=2.0G features='0' hwhandler='0' wp=rw\n"
"`-+- policy='round-robin 0' prio=-1 status=active\n"
" |- 0:0:0:1 sde 8:64 active undef running\n"
" `- 2:0:0:1 sdf 8:80 active undef running\n"
)
return out, None
def fake_execute2(*cmd, **kwargs):
out = ("350002ac20398383d dm-3 3PARdata,VV\n"
"size=2.0G features='0' hwhandler='0' wp=rw\n"
"`-+- policy='round-robin 0' prio=-1 status=active\n"
" |- 0:0:0:1 sde 8:64 active undef running\n"
" `- 2:0:0:1 sdf 8:80 active undef running\n"
)
return out, None
self.stubs.Set(utils, 'execute', fake_execute)
info = linuxscsi.find_multipath_device('/dev/sde')
LOG.error("info = %s" % info)
self.assertEqual("/dev/dm-3", info["device"])
self.assertEqual("/dev/sde", info['devices'][0]['device'])
self.assertEqual("0", info['devices'][0]['host'])
self.assertEqual("0", info['devices'][0]['id'])
self.assertEqual("0", info['devices'][0]['channel'])
self.assertEqual("1", info['devices'][0]['lun'])
self.assertEqual("/dev/sdf", info['devices'][1]['device'])
self.assertEqual("2", info['devices'][1]['host'])
self.assertEqual("0", info['devices'][1]['id'])
self.assertEqual("0", info['devices'][1]['channel'])
self.assertEqual("1", info['devices'][1]['lun'])
def test_find_multipath_device_svc(self):
def fake_execute(*cmd, **kwargs):
out = ("36005076da00638089c000000000004d5 dm-2 IBM,2145\n"
"size=954M features='1 queue_if_no_path' hwhandler='0'"
" wp=rw\n"
"|-+- policy='round-robin 0' prio=-1 status=active\n"
"| |- 6:0:2:0 sde 8:64 active undef running\n"
"| `- 6:0:4:0 sdg 8:96 active undef running\n"
"`-+- policy='round-robin 0' prio=-1 status=enabled\n"
" |- 6:0:3:0 sdf 8:80 active undef running\n"
" `- 6:0:5:0 sdh 8:112 active undef running\n"
)
return out, None
self.stubs.Set(utils, 'execute', fake_execute)
info = linuxscsi.find_multipath_device('/dev/sde')
LOG.error("info = %s" % info)
self.assertEqual("/dev/dm-2", info["device"])
self.assertEqual("/dev/sde", info['devices'][0]['device'])
self.assertEqual("6", info['devices'][0]['host'])
self.assertEqual("0", info['devices'][0]['channel'])
self.assertEqual("2", info['devices'][0]['id'])
self.assertEqual("0", info['devices'][0]['lun'])
self.assertEqual("/dev/sdf", info['devices'][2]['device'])
self.assertEqual("6", info['devices'][2]['host'])
self.assertEqual("0", info['devices'][2]['channel'])
self.assertEqual("3", info['devices'][2]['id'])
self.assertEqual("0", info['devices'][2]['lun'])
def test_find_multipath_device_ds8000(self):
def fake_execute(*cmd, **kwargs):
out = ("36005076303ffc48e0000000000000101 dm-2 IBM,2107900\n"
"size=1.0G features='1 queue_if_no_path' hwhandler='0'"
" wp=rw\n"
"`-+- policy='round-robin 0' prio=-1 status=active\n"
" |- 6:0:2:0 sdd 8:64 active undef running\n"
" `- 6:1:0:3 sdc 8:32 active undef running\n"
)
return out, None
self.stubs.Set(utils, 'execute', fake_execute)
info = linuxscsi.find_multipath_device('/dev/sdd')
LOG.error("info = %s" % info)
self.assertEqual("/dev/dm-2", info["device"])
self.assertEqual("/dev/sdd", info['devices'][0]['device'])
self.assertEqual("6", info['devices'][0]['host'])
self.assertEqual("0", info['devices'][0]['channel'])
self.assertEqual("2", info['devices'][0]['id'])
self.assertEqual("0", info['devices'][0]['lun'])
self.assertEqual("/dev/sdc", info['devices'][1]['device'])
self.assertEqual("6", info['devices'][1]['host'])
self.assertEqual("1", info['devices'][1]['channel'])
self.assertEqual("0", info['devices'][1]['id'])
self.assertEqual("3", info['devices'][1]['lun'])
def disconnect_volume(self, connection_info, mount_device):
"""Detach the volume from instance_name."""
super(LibvirtFibreChannelVolumeDriver,
self).disconnect_volume(connection_info, mount_device)
# 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 'multipath_id' in connection_info['data']:
multipath_id = connection_info['data']['multipath_id']
mdev_info = linuxscsi.find_multipath_device(multipath_id)
devices = mdev_info['devices']
LOG.debug("devices to remove = %s", devices)
else:
# only needed when multipath-tools work improperly
devices = connection_info['data'].get('devices', [])
LOG.warn(
_LW("multipath-tools probably work improperly. "
"devices to remove = %s.") % devices)
# 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:
linuxscsi.remove_device(device)
def disconnect_volume(self, connection_info, mount_device):
"""Detach the volume from instance_name."""
super(LibvirtFibreChannelVolumeDriver, self).disconnect_volume(connection_info, mount_device)
devices = connection_info["data"]["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 "multipath_id" in connection_info["data"]:
multipath_id = connection_info["data"]["multipath_id"]
mdev_info = linuxscsi.find_multipath_device(multipath_id)
devices = mdev_info["devices"]
LOG.debug(_("devices to remove = %s"), devices)
# 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:
linuxscsi.remove_device(device)
def disconnect_volume(self, connection_info, mount_device):
"""Detach the volume from instance_name."""
super(LibvirtFibreChannelVolumeDriver,
self).disconnect_volume(connection_info, mount_device)
# 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 'multipath_id' in connection_info['data']:
multipath_id = connection_info['data']['multipath_id']
mdev_info = linuxscsi.find_multipath_device(multipath_id)
devices = mdev_info['devices']
LOG.debug(_("devices to remove = %s"), devices)
else:
# only needed when multipath-tools work improperly
devices = connection_info['data'].get('devices', [])
LOG.warn(_LW("multipath-tools probably work improperly. "
"devices to remove = %s.") % devices)
# 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:
linuxscsi.remove_device(device)
def connect_volume(self, connection_info, disk_info):
"""Attach the volume to instance_name."""
fc_properties = connection_info['data']
mount_device = disk_info["dev"]
ports = fc_properties['target_wwn']
wwns = []
# we support a list of wwns or a single wwn
if isinstance(ports, list):
for wwn in ports:
wwns.append(wwn)
elif isinstance(ports, str):
wwns.append(ports)
# We need to look for wwns on every hba
# because we don't know ahead of time
# where they will show up.
hbas = virtutils.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,
fc_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")
raise exception.NovaException(msg)
# 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, mount_device):
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 >= CONF.num_iscsi_scan_tries:
msg = _("Fibre Channel device not found.")
raise exception.NovaException(msg)
LOG.warn(
_("Fibre volume not yet found at: %(mount_device)s. "
"Will rescan & retry. Try number: %(tries)s"), {
'mount_device': mount_device,
'tries': tries
})
linuxscsi.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, mount_device)
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 %(mount_device)s "
"(after %(tries)s rescans)"), {
'mount_device': mount_device,
'tries': tries
})
# see if the new drive is part of a multipath
# device. If so, we'll use the multipath device.
mdev_info = 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']
connection_info['data']['devices'] = mdev_info['devices']
connection_info['data']['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
device_info = linuxscsi.get_device_info(self.device_name)
connection_info['data']['devices'] = [device_info]
conf = super(LibvirtFibreChannelVolumeDriver,
self).connect_volume(connection_info, disk_info)
conf.source_type = "block"
conf.source_path = device_path
return conf
def connect_volume(self, connection_info, disk_info):
"""Attach the volume to instance_name."""
fc_properties = connection_info['data']
mount_device = disk_info["dev"]
ports = fc_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, six.string_types):
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 = virtutils.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,
fc_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")
raise exception.NovaException(msg)
# 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, mount_device):
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 >= CONF.libvirt.num_iscsi_scan_tries:
msg = _("Fibre Channel device not found.")
raise exception.NovaException(msg)
LOG.warn(_("Fibre volume not yet found at: %(mount_device)s. "
"Will rescan & retry. Try number: %(tries)s"),
{'mount_device': mount_device,
'tries': tries})
linuxscsi.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, mount_device)
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 %(mount_device)s "
"(after %(tries)s rescans)"),
{'mount_device': mount_device,
'tries': tries})
# see if the new drive is part of a multipath
# device. If so, we'll use the multipath device.
mdev_info = 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']
connection_info['data']['devices'] = mdev_info['devices']
connection_info['data']['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
device_info = linuxscsi.get_device_info(self.device_name)
connection_info['data']['devices'] = [device_info]
conf = super(LibvirtFibreChannelVolumeDriver,
self).connect_volume(connection_info, disk_info)
conf.source_type = "block"
conf.source_path = device_path
return conf
