/usr/share/pyshared/nova/volume/iscsi.py is in python-nova 2012.1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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 code for the iSCSI volume driver.
"""
from nova import flags
from nova.openstack.common import cfg
from nova import utils
iscsi_helper_opt = cfg.StrOpt('iscsi_helper',
default='ietadm',
help='iscsi target user-land tool to use')
FLAGS = flags.FLAGS
FLAGS.register_opt(iscsi_helper_opt)
class TargetAdmin(object):
"""iSCSI target administration.
Base class for iSCSI target admin helpers.
"""
def __init__(self, cmd, execute):
self._cmd = cmd
self.set_execute(execute)
def set_execute(self, execute):
"""Set the function to be used to execute commands."""
self._execute = execute
def _run(self, *args, **kwargs):
self._execute(self._cmd, *args, run_as_root=True, **kwargs)
def new_target(self, name, tid, **kwargs):
"""Create a new iSCSI target."""
raise NotImplementedError()
def delete_target(self, tid, **kwargs):
"""Delete a target."""
raise NotImplementedError()
def show_target(self, tid, **kwargs):
"""Query the given target ID."""
raise NotImplementedError()
def new_logicalunit(self, tid, lun, path, **kwargs):
"""Create a new LUN on a target using the supplied path."""
raise NotImplementedError()
def delete_logicalunit(self, tid, lun, **kwargs):
"""Delete a logical unit from a target."""
raise NotImplementedError()
class TgtAdm(TargetAdmin):
"""iSCSI target administration using tgtadm."""
def __init__(self, execute=utils.execute):
super(TgtAdm, self).__init__('tgtadm', execute)
def new_target(self, name, tid, **kwargs):
self._run('--op', 'new',
'--lld=iscsi', '--mode=target',
'--tid=%s' % tid,
'--targetname=%s' % name,
**kwargs)
self._run('--op', 'bind',
'--lld=iscsi', '--mode=target',
'--initiator-address=ALL',
'--tid=%s' % tid,
**kwargs)
def delete_target(self, tid, **kwargs):
self._run('--op', 'delete',
'--lld=iscsi', '--mode=target',
'--tid=%s' % tid,
**kwargs)
def show_target(self, tid, **kwargs):
self._run('--op', 'show',
'--lld=iscsi', '--mode=target',
'--tid=%s' % tid,
**kwargs)
def new_logicalunit(self, tid, lun, path, **kwargs):
self._run('--op', 'new',
'--lld=iscsi', '--mode=logicalunit',
'--tid=%s' % tid,
'--lun=%d' % (lun + 1), # lun0 is reserved
'--backing-store=%s' % path,
**kwargs)
def delete_logicalunit(self, tid, lun, **kwargs):
self._run('--op', 'delete',
'--lld=iscsi', '--mode=logicalunit',
'--tid=%s' % tid,
'--lun=%d' % (lun + 1),
**kwargs)
class IetAdm(TargetAdmin):
"""iSCSI target administration using ietadm."""
def __init__(self, execute=utils.execute):
super(IetAdm, self).__init__('ietadm', execute)
def new_target(self, name, tid, **kwargs):
self._run('--op', 'new',
'--tid=%s' % tid,
'--params', 'Name=%s' % name,
**kwargs)
def delete_target(self, tid, **kwargs):
self._run('--op', 'delete',
'--tid=%s' % tid,
**kwargs)
def show_target(self, tid, **kwargs):
self._run('--op', 'show',
'--tid=%s' % tid,
**kwargs)
def new_logicalunit(self, tid, lun, path, **kwargs):
self._run('--op', 'new',
'--tid=%s' % tid,
'--lun=%d' % lun,
'--params', 'Path=%s,Type=fileio' % path,
**kwargs)
def delete_logicalunit(self, tid, lun, **kwargs):
self._run('--op', 'delete',
'--tid=%s' % tid,
'--lun=%d' % lun,
**kwargs)
def get_target_admin():
if FLAGS.iscsi_helper == 'tgtadm':
return TgtAdm()
else:
return IetAdm()
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