*** This bug is a duplicate of bug 1593860 ***
https://bugs.launchpad.net/bugs/1593860
** This bug has been marked a duplicate of bug 1593860
iscsi_use_multipath confusing
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https://bugs.launchpad.net/bugs/1555666
Title:
Nova FC and iSCSI volume drivers use same 'iscsi_use_multipath' conf
entry for multipath
Status in OpenStack Compute (nova):
In Progress
Bug description:
Version:
------------
commit f4dd117a81c68d9fb600dff456e1171841758b43
Merge: 09fc0af 52ea564
Author: Jenkins <jenk...@review.openstack.org>
Date: Thu Mar 10 12:35:11 2016 +0000
Merge "Use generic wrapper for cinder exceptions"
Issue:
--------
Both FC & iSCSI drivers decide on multipath based on the
'iscsi_use_multipath' config parameter. This is ambiguous and we need
to have different conf entries for iSCSI and FC, which will enable
user to selectively use a feature
Code Block:
-----------------
FC:
class LibvirtFibreChannelVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
"""Driver to attach Fibre Channel Network volumes to libvirt."""
def __init__(self, connection):
super(LibvirtFibreChannelVolumeDriver,
self).__init__(connection, is_block_dev=False)
# Call the factory here so we can support
# more than x86 architectures.
self.connector = connector.InitiatorConnector.factory(
'FIBRE_CHANNEL', utils.get_root_helper(),
use_multipath=CONF.libvirt.iscsi_use_multipath,
device_scan_attempts=CONF.libvirt.num_iscsi_scan_tries)
iSCSI:
class LibvirtISCSIVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
"""Driver to attach Network volumes to libvirt."""
def __init__(self, connection):
super(LibvirtISCSIVolumeDriver, self).__init__(connection,
is_block_dev=True)
# Call the factory here so we can support
# more than x86 architectures.
self.connector = connector.InitiatorConnector.factory(
'ISCSI', utils.get_root_helper(),
use_multipath=CONF.libvirt.iscsi_use_multipath,
device_scan_attempts=CONF.libvirt.num_iscsi_scan_tries,
transport=self._get_transport())
LibvirtDriver:
def get_volume_connector(self, instance):
root_helper = utils.get_root_helper()
return connector.get_connector_properties(
root_helper, CONF.my_block_storage_ip,
CONF.libvirt.iscsi_use_multipath,
enforce_multipath=True,
host=CONF.host)
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