253 lines
9.5 KiB
Python
253 lines
9.5 KiB
Python
# Copyright 2015 Chelsio Communications Inc.
|
|
# 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.
|
|
|
|
|
|
import os
|
|
|
|
from oslo_concurrency import processutils as putils
|
|
from oslo_log import log as logging
|
|
from oslo_utils import fileutils
|
|
from oslo_utils import netutils
|
|
|
|
from cinder import exception
|
|
from cinder import utils
|
|
from cinder.volume.targets import iscsi
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class CxtAdm(iscsi.ISCSITarget):
|
|
"""Chiscsi target configuration for block storage devices.
|
|
|
|
This includes things like create targets, attach, detach
|
|
etc.
|
|
"""
|
|
|
|
TARGET_FMT = """
|
|
target:
|
|
TargetName=%s
|
|
TargetDevice=%s
|
|
PortalGroup=1@%s
|
|
"""
|
|
TARGET_FMT_WITH_CHAP = """
|
|
target:
|
|
TargetName=%s
|
|
TargetDevice=%s
|
|
PortalGroup=1@%s
|
|
AuthMethod=CHAP
|
|
Auth_CHAP_Policy=Oneway
|
|
Auth_CHAP_Initiator=%s
|
|
"""
|
|
|
|
cxt_subdir = 'cxt'
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(CxtAdm, self).__init__(*args, **kwargs)
|
|
self.volumes_dir = self.configuration.safe_get('volumes_dir')
|
|
self.volumes_dir = os.path.join(self.volumes_dir, self.cxt_subdir)
|
|
self.config = self.configuration.safe_get('chiscsi_conf')
|
|
|
|
def _get_volumes_dir(self):
|
|
return self.volumes_dir
|
|
|
|
def _get_target(self, iqn):
|
|
# We can use target=iqn here, but iscsictl has no --brief mode, and
|
|
# this way we save on a lot of unnecessary parsing
|
|
(out, err) = utils.execute('iscsictl',
|
|
'-c',
|
|
'target=ALL',
|
|
run_as_root=True)
|
|
lines = out.split('\n')
|
|
for line in lines:
|
|
if iqn in line:
|
|
parsed = line.split()
|
|
tid = parsed[2]
|
|
return tid[3:].rstrip(',')
|
|
|
|
return None
|
|
|
|
def _get_iscsi_target(self, context, vol_id):
|
|
return 0
|
|
|
|
def _get_target_and_lun(self, context, volume):
|
|
lun = 0 # For chiscsi dev starts at lun 0
|
|
iscsi_target = 1
|
|
return iscsi_target, lun
|
|
|
|
@staticmethod
|
|
def _get_portal(ip, port=None):
|
|
# ipv6 addresses use [ip]:port format, ipv4 use ip:port
|
|
portal_port = ':%d' % port if port else ''
|
|
|
|
if netutils.is_valid_ipv4(ip):
|
|
portal_ip = ip
|
|
else:
|
|
portal_ip = '[' + ip + ']'
|
|
|
|
return portal_ip + portal_port
|
|
|
|
def create_iscsi_target(self, name, tid, lun, path,
|
|
chap_auth=None, **kwargs):
|
|
|
|
(out, err) = utils.execute('iscsictl',
|
|
'-c',
|
|
'target=ALL',
|
|
run_as_root=True)
|
|
LOG.debug("Targets prior to update: %s", out)
|
|
volumes_dir = self._get_volumes_dir()
|
|
fileutils.ensure_tree(volumes_dir)
|
|
|
|
vol_id = name.split(':')[1]
|
|
|
|
cfg_port = kwargs.get('portals_port')
|
|
cfg_ips = kwargs.get('portals_ips')
|
|
|
|
portals = ','.join(map(lambda ip: self._get_portal(ip, cfg_port),
|
|
cfg_ips))
|
|
|
|
if chap_auth is None:
|
|
volume_conf = self.TARGET_FMT % (name, path, portals)
|
|
else:
|
|
volume_conf = self.TARGET_FMT_WITH_CHAP % (name,
|
|
path, portals,
|
|
'"%s":"%s"' % chap_auth)
|
|
LOG.debug('Creating iscsi_target for: %s', vol_id)
|
|
volume_path = os.path.join(volumes_dir, vol_id)
|
|
|
|
if os.path.exists(volume_path):
|
|
LOG.warning('Persistence file already exists for volume, '
|
|
'found file at: %s', volume_path)
|
|
utils.robust_file_write(volumes_dir, vol_id, volume_conf)
|
|
LOG.debug('Created volume path %(vp)s,\n'
|
|
'content: %(vc)s',
|
|
{'vp': volume_path, 'vc': volume_conf})
|
|
|
|
old_persist_file = None
|
|
old_name = kwargs.get('old_name', None)
|
|
if old_name:
|
|
LOG.debug('Detected old persistence file for volume '
|
|
'%(vol)s at %(old_name)s',
|
|
{'vol': vol_id, 'old_name': old_name})
|
|
old_persist_file = os.path.join(volumes_dir, old_name)
|
|
|
|
try:
|
|
# With the persistent tgts we create them
|
|
# by creating the entry in the persist file
|
|
# and then doing an update to get the target
|
|
# created.
|
|
(out, err) = utils.execute('iscsictl', '-S', 'target=%s' % name,
|
|
'-f', volume_path,
|
|
'-x', self.config,
|
|
run_as_root=True)
|
|
except putils.ProcessExecutionError as e:
|
|
LOG.error("Failed to create iscsi target for volume "
|
|
"id:%(vol_id)s: %(e)s",
|
|
{'vol_id': vol_id, 'e': e})
|
|
|
|
# Don't forget to remove the persistent file we created
|
|
os.unlink(volume_path)
|
|
raise exception.ISCSITargetCreateFailed(volume_id=vol_id)
|
|
finally:
|
|
LOG.debug("StdOut from iscsictl -S: %s", out)
|
|
LOG.debug("StdErr from iscsictl -S: %s", err)
|
|
|
|
# Grab targets list for debug
|
|
(out, err) = utils.execute('iscsictl',
|
|
'-c',
|
|
'target=ALL',
|
|
run_as_root=True)
|
|
LOG.debug("Targets after update: %s", out)
|
|
|
|
iqn = '%s%s' % (self.iscsi_target_prefix, vol_id)
|
|
tid = self._get_target(iqn)
|
|
if tid is None:
|
|
LOG.error("Failed to create iscsi target for volume "
|
|
"id:%(vol_id)s. Please verify your configuration "
|
|
"in %(volumes_dir)s'",
|
|
{'vol_id': vol_id,
|
|
'volumes_dir': volumes_dir, })
|
|
raise exception.NotFound()
|
|
|
|
if old_persist_file is not None and os.path.exists(old_persist_file):
|
|
os.unlink(old_persist_file)
|
|
|
|
return tid
|
|
|
|
def remove_iscsi_target(self, tid, lun, vol_id, vol_name, **kwargs):
|
|
LOG.info('Removing iscsi_target for: %s', vol_id)
|
|
vol_uuid_file = vol_name
|
|
volume_path = os.path.join(self._get_volumes_dir(), vol_uuid_file)
|
|
if not os.path.exists(volume_path):
|
|
LOG.warning('Volume path %s does not exist, '
|
|
'nothing to remove.', volume_path)
|
|
return
|
|
|
|
if os.path.isfile(volume_path):
|
|
iqn = '%s%s' % (self.iscsi_target_prefix,
|
|
vol_uuid_file)
|
|
else:
|
|
raise exception.ISCSITargetRemoveFailed(volume_id=vol_id)
|
|
|
|
target_exists = False
|
|
try:
|
|
(out, err) = utils.execute('iscsictl',
|
|
'-c',
|
|
'target=%s' % iqn,
|
|
run_as_root=True)
|
|
LOG.debug("StdOut from iscsictl -c: %s", out)
|
|
LOG.debug("StdErr from iscsictl -c: %s", err)
|
|
except putils.ProcessExecutionError as e:
|
|
if "NOT found" in e.stdout:
|
|
LOG.info("No iscsi target present for volume "
|
|
"id:%(vol_id)s: %(e)s",
|
|
{'vol_id': vol_id, 'e': e})
|
|
return
|
|
else:
|
|
raise exception.ISCSITargetRemoveFailed(volume_id=vol_id)
|
|
else:
|
|
target_exists = True
|
|
|
|
try:
|
|
utils.execute('iscsictl',
|
|
'-s',
|
|
'target=%s' % iqn,
|
|
run_as_root=True)
|
|
except putils.ProcessExecutionError as e:
|
|
# There exists a race condition where multiple calls to
|
|
# remove_iscsi_target come in simultaneously. If we can poll
|
|
# for a target successfully but it is gone before we can remove
|
|
# it, fail silently
|
|
if "is not found" in e.stderr and target_exists:
|
|
LOG.info("No iscsi target present for volume "
|
|
"id:%(vol_id)s: %(e)s",
|
|
{'vol_id': vol_id, 'e': e})
|
|
return
|
|
else:
|
|
LOG.error("Failed to remove iscsi target for volume "
|
|
"id:%(vol_id)s: %(e)s",
|
|
{'vol_id': vol_id, 'e': e})
|
|
raise exception.ISCSITargetRemoveFailed(volume_id=vol_id)
|
|
|
|
# Carried over from tgt
|
|
# NOTE(jdg): This *should* be there still but incase
|
|
# it's not we don't care, so just ignore it if was
|
|
# somehow deleted between entry of this method
|
|
# and here
|
|
if os.path.exists(volume_path):
|
|
os.unlink(volume_path)
|
|
else:
|
|
LOG.debug('Volume path %s not found at end, '
|
|
'of remove_iscsi_target.', volume_path)
|