704 lines
26 KiB
Python
704 lines
26 KiB
Python
# Copyright (c) 2014 Hitachi Data Systems, Inc.
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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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#
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"""
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iSCSI Cinder Volume driver for Hitachi Unified Storage (HUS-HNAS) platform.
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"""
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from xml.etree import ElementTree as ETree
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from oslo.config import cfg
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from oslo.utils import excutils
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from oslo.utils import units
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from cinder import exception
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from cinder.i18n import _LE, _LI
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from cinder.openstack.common import log as logging
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from cinder.volume import driver
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from cinder.volume.drivers.hds.hnas_backend import HnasBackend
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from cinder.volume import utils
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HDS_HNAS_ISCSI_VERSION = '1.0.0'
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LOG = logging.getLogger(__name__)
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iSCSI_OPTS = [
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cfg.StrOpt('hds_hnas_iscsi_config_file',
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default='/opt/hds/hnas/cinder_iscsi_conf.xml',
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help='Configuration file for HDS iSCSI cinder plugin')]
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CONF = cfg.CONF
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CONF.register_opts(iSCSI_OPTS)
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HNAS_DEFAULT_CONFIG = {'hnas_cmd': 'ssc', 'chap_enabled': 'True'}
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def factory_bend(type):
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return HnasBackend()
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def _loc_info(loc):
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"""Parse info from location string."""
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LOG.info("Parse_loc: %s" % loc)
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info = {}
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tup = loc.split(',')
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if len(tup) < 5:
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info['id_lu'] = tup[0].split('.')
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return info
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info['id_lu'] = tup[2].split('.')
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info['tgt'] = tup
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return info
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def _xml_read(root, element, check=None):
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"""Read an xml element."""
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try:
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val = root.findtext(element)
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LOG.info(_LI("%(element)s: %(val)s")
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% {'element': element,
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'val': val})
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if val:
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return val.strip()
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if check:
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raise exception.ParameterNotFound(param=element)
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return None
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except ETree.ParseError:
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if check:
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with excutils.save_and_reraise_exception():
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LOG.error(_LE("XML exception reading "
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"parameter: %s") % element)
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else:
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LOG.info(_LI("XML exception reading parameter: %s") % element)
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return None
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def _read_config(xml_config_file):
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"""Read hds driver specific xml config file."""
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try:
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root = ETree.parse(xml_config_file).getroot()
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except Exception:
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raise exception.NotFound(message='config file not found: '
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+ xml_config_file)
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# mandatory parameters
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config = {}
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arg_prereqs = ['mgmt_ip0', 'username', 'password']
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for req in arg_prereqs:
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config[req] = _xml_read(root, req, 'check')
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# optional parameters
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for opt in ['hnas_cmd', 'chap_enabled']:
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config[opt] = _xml_read(root, opt) or\
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HNAS_DEFAULT_CONFIG[opt]
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config['hdp'] = {}
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config['services'] = {}
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# min one needed
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for svc in ['svc_0', 'svc_1', 'svc_2', 'svc_3']:
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if _xml_read(root, svc) is None:
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continue
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service = {'label': svc}
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# none optional
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for arg in ['volume_type', 'hdp', 'iscsi_ip']:
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service[arg] = _xml_read(root, svc + '/' + arg, 'check')
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config['services'][service['volume_type']] = service
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config['hdp'][service['hdp']] = service['hdp']
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# at least one service required!
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if config['services'].keys() is None:
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raise exception.ParameterNotFound(param="No service found")
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return config
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class HDSISCSIDriver(driver.ISCSIDriver):
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"""HDS HNAS volume driver."""
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def __init__(self, *args, **kwargs):
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"""Initialize, read different config parameters."""
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super(HDSISCSIDriver, self).__init__(*args, **kwargs)
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self.driver_stats = {}
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self.context = {}
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self.configuration.append_config_values(iSCSI_OPTS)
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self.config = _read_config(
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self.configuration.hds_hnas_iscsi_config_file)
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self.type = 'HNAS'
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self.platform = self.type.lower()
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LOG.info(_LI("Backend type: %s") % self.type)
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self.bend = factory_bend(self.type)
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def _array_info_get(self):
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"""Get array parameters."""
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out = self.bend.get_version(self.config['hnas_cmd'],
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HDS_HNAS_ISCSI_VERSION,
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'])
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inf = out.split()
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return inf[1], 'hnas_' + inf[1], inf[6]
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def _get_iscsi_info(self):
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"""Validate array iscsi parameters."""
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out = self.bend.get_iscsi_info(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'])
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lines = out.split('\n')
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# dict based on iSCSI portal ip addresses
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conf = {}
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for line in lines:
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# only record up links
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if 'CTL' in line and 'Up' in line:
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inf = line.split()
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(ctl, port, ip, ipp) = (inf[1], inf[3], inf[5], inf[7])
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conf[ip] = {}
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conf[ip]['ctl'] = ctl
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conf[ip]['port'] = port
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conf[ip]['iscsi_port'] = ipp
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msg = ('portal: %(ip)s:%(ipp)s, CTL: %(ctl)s, port: %(port)s')
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LOG.debug(msg
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% {'ip': ip,
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'ipp': ipp,
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'ctl': ctl,
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'port': port})
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return conf
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def _get_service(self, volume):
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"""Get the available service parameters for a given volume using
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its type.
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:param volume: dictionary volume reference
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"""
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label = None
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if volume['volume_type']:
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label = volume['volume_type']['name']
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label = label or 'default'
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if label not in self.config['services'].keys():
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# default works if no match is found
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label = 'default'
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LOG.info(_LI("Using default: instead of %s") % label)
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LOG.info(_LI("Available services: %s")
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% self.config['services'].keys())
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if label in self.config['services'].keys():
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svc = self.config['services'][label]
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# HNAS - one time lookup
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# see if the client supports CHAP authentication and if
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# iscsi_secret has already been set, retrieve the secret if
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# available, otherwise generate and store
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if self.config['chap_enabled'] == 'True':
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# it may not exist, create and set secret
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if 'iscsi_secret' not in svc:
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LOG.info(_LI("Retrieving secret for service: %s")
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% label)
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out = self.bend.get_targetsecret(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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'cinder-' + label,
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svc['hdp'])
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svc['iscsi_secret'] = out
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if svc['iscsi_secret'] == "":
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svc['iscsi_secret'] = utils.generate_password()[0:15]
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self.bend.set_targetsecret(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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svc['iscsi_target'],
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svc['hdp'],
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svc['iscsi_secret'])
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LOG.info("Set tgt CHAP secret for service: %s"
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% (label))
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else:
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# We set blank password when the client does not
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# support CHAP. Later on, if the client tries to create a new
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# target that does not exists in the backend, we check for this
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# value and use a temporary dummy password.
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if 'iscsi_secret' not in svc:
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# Warns in the first time
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LOG.info("CHAP authentication disabled")
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svc['iscsi_secret'] = ""
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if 'iscsi_target' not in svc:
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LOG.info(_LI("Retrieving target for service: %s") % label)
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out = self.bend.get_targetiqn(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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'cinder-' + label,
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svc['hdp'],
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svc['iscsi_secret'])
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svc['iscsi_target'] = out
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self.config['services'][label] = svc
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service = (svc['iscsi_ip'], svc['iscsi_port'], svc['ctl'],
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svc['port'], svc['hdp'], svc['iscsi_target'],
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svc['iscsi_secret'])
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else:
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LOG.info(_LI("Available services: %s")
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% self.config['services'].keys())
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LOG.error(_LE("No configuration found for service: %s")
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% label)
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raise exception.ParameterNotFound(param=label)
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return service
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def _get_stats(self):
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"""Get HDP stats from HNAS."""
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total_cap = 0
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total_used = 0
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out = self.bend.get_hdp_info(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'])
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for line in out.split('\n'):
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if 'HDP' in line:
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(hdp, size, _ign, used) = line.split()[1:5] # in MB
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LOG.debug("stats: looking for: %s", hdp)
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if int(hdp) >= units.Ki: # HNAS fsid
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hdp = line.split()[11]
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if hdp in self.config['hdp'].keys():
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total_cap += int(size)
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total_used += int(used)
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LOG.info("stats: total: %d used: %d" % (total_cap, total_used))
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hnas_stat = {}
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hnas_stat['total_capacity_gb'] = int(total_cap / units.Ki) # in GB
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hnas_stat['free_capacity_gb'] = \
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int((total_cap - total_used) / units.Ki)
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be_name = self.configuration.safe_get('volume_backend_name')
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hnas_stat["volume_backend_name"] = be_name or 'HDSISCSIDriver'
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hnas_stat["vendor_name"] = 'HDS'
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hnas_stat["driver_version"] = HDS_HNAS_ISCSI_VERSION
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hnas_stat["storage_protocol"] = 'iSCSI'
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hnas_stat['QoS_support'] = False
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hnas_stat['reserved_percentage'] = 0
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LOG.info(_LI("stats: stats: %s") % hnas_stat)
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return hnas_stat
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def _get_hdp_list(self):
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"""Get HDPs from HNAS."""
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out = self.bend.get_hdp_info(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'])
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hdp_list = []
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for line in out.split('\n'):
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if 'HDP' in line:
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inf = line.split()
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if int(inf[1]) >= units.Ki:
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# HDP fsids start at units.Ki (1024)
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hdp_list.append(inf[11])
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else:
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# HDP pools are 2-digits max
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hdp_list.extend(inf[1:2])
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# returns a list of HDP IDs
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LOG.info(_LI("HDP list: %s") % hdp_list)
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return hdp_list
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def _check_hdp_list(self):
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"""Verify HDPs in HNAS array.
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Verify that all HDPs specified in the configuration files actually
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exists on the storage.
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"""
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hdpl = self._get_hdp_list()
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lst = self.config['hdp'].keys()
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for hdp in lst:
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if hdp not in hdpl:
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LOG.error(_LE("HDP not found: %s") % hdp)
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err = "HDP not found: " + hdp
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raise exception.ParameterNotFound(param=err)
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# status, verify corresponding status is Normal
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def _id_to_vol(self, volume_id):
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"""Given the volume id, retrieve the volume object from database.
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:param volume_id: volume id string
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"""
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vol = self.db.volume_get(self.context, volume_id)
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return vol
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def _update_vol_location(self, volume_id, loc):
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"""Update the provider location.
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:param volume_id: volume id string
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:param loc: string provider location value
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"""
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update = {'provider_location': loc}
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self.db.volume_update(self.context, volume_id, update)
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def check_for_setup_error(self):
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"""Returns an error if prerequisites aren't met."""
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pass
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def do_setup(self, context):
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"""Setup and verify HDS HNAS storage connection."""
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self.context = context
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(self.arid, self.hnas_name, self.lumax) = self._array_info_get()
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self._check_hdp_list()
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iscsi_info = self._get_iscsi_info()
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LOG.info(_LI("do_setup: %s") % iscsi_info)
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for svc in self.config['services'].keys():
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svc_ip = self.config['services'][svc]['iscsi_ip']
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if svc_ip in iscsi_info.keys():
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LOG.info(_LI("iSCSI portal found for service: %s") % svc_ip)
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self.config['services'][svc]['port'] = \
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iscsi_info[svc_ip]['port']
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self.config['services'][svc]['ctl'] = iscsi_info[svc_ip]['ctl']
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self.config['services'][svc]['iscsi_port'] = \
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iscsi_info[svc_ip]['iscsi_port']
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else: # config iscsi address not found on device!
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LOG.error(_LE("iSCSI portal not found "
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"for service: %s") % svc_ip)
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raise exception.ParameterNotFound(param=svc_ip)
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def ensure_export(self, context, volume):
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pass
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def create_export(self, context, volume):
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"""Create an export. Moved to initialize_connection.
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:param context:
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:param volume: volume reference
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"""
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name = volume['name']
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LOG.debug("create_export %(name)s" % {'name': name})
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pass
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def remove_export(self, context, volume):
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"""Disconnect a volume from an attached instance.
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:param context: context
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:param volume: dictionary volume reference
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"""
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provider = volume['provider_location']
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name = volume['name']
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LOG.debug("remove_export provider %(provider)s on %(name)s"
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% {'provider': provider,
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'name': name})
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pass
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def create_volume(self, volume):
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"""Create a LU on HNAS.
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:param volume: ditctionary volume reference
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"""
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service = self._get_service(volume)
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(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
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out = self.bend.create_lu(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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hdp,
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'%s' % (int(volume['size']) * units.Ki),
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volume['name'])
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LOG.info(_LI("create_volume: create_lu returns %s") % out)
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lun = self.arid + '.' + out.split()[1]
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sz = int(out.split()[5])
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# Example: 92210013.volume-44d7e29b-2aa4-4606-8bc4-9601528149fd
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LOG.info(_LI("LUN %(lun)s of size %(sz)s MB is created.")
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% {'lun': lun, 'sz': sz})
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return {'provider_location': lun}
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def create_cloned_volume(self, dst, src):
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"""Create a clone of a volume.
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:param dst: ditctionary destination volume reference
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:param src: ditctionary source volume reference
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"""
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if src['size'] != dst['size']:
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msg = 'clone volume size mismatch'
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raise exception.VolumeBackendAPIException(data=msg)
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service = self._get_service(dst)
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(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
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size = int(src['size']) * units.Ki
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source_vol = self._id_to_vol(src['id'])
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(arid, slun) = _loc_info(source_vol['provider_location'])['id_lu']
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out = self.bend.create_dup(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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slun, hdp, '%s' % size,
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dst['name'])
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lun = self.arid + '.' + out.split()[1]
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size = int(out.split()[5])
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LOG.debug("LUN %(lun)s of size %(size)s MB is cloned."
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% {'lun': lun,
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'size': size})
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return {'provider_location': lun}
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def extend_volume(self, volume, new_size):
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"""Extend an existing volume.
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:param volume: dictionary volume reference
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:param new_size: int size in GB to extend
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"""
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service = self._get_service(volume)
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(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
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(arid, lun) = _loc_info(volume['provider_location'])['id_lu']
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self.bend.extend_vol(self.config['hnas_cmd'],
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self.config['mgmt_ip0'],
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self.config['username'],
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self.config['password'],
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hdp, lun,
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'%s' % (new_size * units.Ki),
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volume['name'])
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LOG.info(_LI("LUN %(lun)s extended to %(size)s GB.")
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% {'lun': lun, 'size': new_size})
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def delete_volume(self, volume):
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"""Delete an LU on HNAS.
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:param volume: dictionary volume reference
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"""
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|
|
|
prov_loc = volume['provider_location']
|
|
if prov_loc is None:
|
|
LOG.error("delete_vol: provider location empty.")
|
|
return
|
|
info = _loc_info(prov_loc)
|
|
(arid, lun) = info['id_lu']
|
|
if 'tgt' in info.keys(): # connected?
|
|
LOG.info("delete lun loc %s" % info['tgt'])
|
|
# loc = id.lun
|
|
(_portal, iqn, loc, ctl, port, hlun) = info['tgt']
|
|
self.bend.del_iscsi_conn(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
ctl, iqn, hlun)
|
|
|
|
name = self.hnas_name
|
|
|
|
LOG.debug("delete lun %(lun)s on %(name)s"
|
|
% {'lun': lun,
|
|
'name': name})
|
|
|
|
service = self._get_service(volume)
|
|
(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
|
|
self.bend.delete_lu(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
hdp, lun)
|
|
|
|
def initialize_connection(self, volume, connector):
|
|
"""Map the created volume to connector['initiator'].
|
|
|
|
:param volume: dictionary volume reference
|
|
:param connector: dictionary connector reference
|
|
"""
|
|
|
|
LOG.info("initialize volume %s connector %s" % (volume, connector))
|
|
|
|
# connector[ip, host, wwnns, unititator, wwp/
|
|
service = self._get_service(volume)
|
|
(ip, ipp, ctl, port, _hdp, target, secret) = service
|
|
info = _loc_info(volume['provider_location'])
|
|
|
|
if 'tgt' in info.keys(): # spurious repeat connection
|
|
# print info.keys()
|
|
LOG.debug("initiate_conn: tgt already set %s" % info['tgt'])
|
|
(arid, lun) = info['id_lu']
|
|
loc = arid + '.' + lun
|
|
# sps, use target if provided
|
|
iqn = target
|
|
out = self.bend.add_iscsi_conn(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
lun, _hdp, port, iqn,
|
|
connector['initiator'])
|
|
|
|
hnas_portal = ip + ':' + ipp
|
|
# sps need hlun, fulliqn
|
|
hlun = out.split()[1]
|
|
fulliqn = out.split()[13]
|
|
tgt = hnas_portal + ',' + iqn + ',' + loc + ',' + ctl + ','
|
|
tgt += port + ',' + hlun
|
|
|
|
LOG.info("initiate: connection %s" % tgt)
|
|
|
|
properties = {}
|
|
properties['provider_location'] = tgt
|
|
self._update_vol_location(volume['id'], tgt)
|
|
properties['target_discovered'] = False
|
|
properties['target_portal'] = hnas_portal
|
|
properties['target_iqn'] = fulliqn
|
|
properties['target_lun'] = hlun
|
|
properties['volume_id'] = volume['id']
|
|
properties['auth_username'] = connector['initiator']
|
|
|
|
if self.config['chap_enabled'] == 'True':
|
|
properties['auth_method'] = 'CHAP'
|
|
properties['auth_password'] = secret
|
|
|
|
return {'driver_volume_type': 'iscsi', 'data': properties}
|
|
|
|
def terminate_connection(self, volume, connector, **kwargs):
|
|
"""Terminate a connection to a volume.
|
|
|
|
:param volume: dictionary volume reference
|
|
:param connector: dictionary connector reference
|
|
"""
|
|
|
|
info = _loc_info(volume['provider_location'])
|
|
if 'tgt' not in info.keys(): # spurious disconnection
|
|
LOG.warn("terminate_conn: provider location empty.")
|
|
return
|
|
(arid, lun) = info['id_lu']
|
|
(_portal, iqn, loc, ctl, port, hlun) = info['tgt']
|
|
LOG.info("terminate: connection %s" % volume['provider_location'])
|
|
self.bend.del_iscsi_conn(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
ctl, iqn, hlun)
|
|
self._update_vol_location(volume['id'], loc)
|
|
|
|
return {'provider_location': loc}
|
|
|
|
def create_volume_from_snapshot(self, volume, snapshot):
|
|
"""Create a volume from a snapshot.
|
|
|
|
:param volume: dictionary volume reference
|
|
:param snapshot: dictionary snapshot reference
|
|
"""
|
|
|
|
size = int(snapshot['volume_size']) * units.Ki
|
|
(arid, slun) = _loc_info(snapshot['provider_location'])['id_lu']
|
|
service = self._get_service(volume)
|
|
(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
|
|
out = self.bend.create_dup(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
slun, hdp, '%s' % (size),
|
|
volume['name'])
|
|
lun = self.arid + '.' + out.split()[1]
|
|
sz = int(out.split()[5])
|
|
|
|
LOG.debug("LUN %(lun)s of size %(sz)s MB is created from snapshot."
|
|
% {'lun': lun, 'sz': sz})
|
|
return {'provider_location': lun}
|
|
|
|
def create_snapshot(self, snapshot):
|
|
"""Create a snapshot.
|
|
:param snapshot: dictionary snapshot reference
|
|
"""
|
|
|
|
source_vol = self._id_to_vol(snapshot['volume_id'])
|
|
service = self._get_service(source_vol)
|
|
(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
|
|
size = int(snapshot['volume_size']) * units.Ki
|
|
(arid, slun) = _loc_info(source_vol['provider_location'])['id_lu']
|
|
out = self.bend.create_dup(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
slun, hdp,
|
|
'%s' % (size),
|
|
snapshot['name'])
|
|
lun = self.arid + '.' + out.split()[1]
|
|
size = int(out.split()[5])
|
|
|
|
LOG.debug("LUN %(lun)s of size %(size)s MB is created."
|
|
% {'lun': lun, 'size': size})
|
|
return {'provider_location': lun}
|
|
|
|
def delete_snapshot(self, snapshot):
|
|
"""Delete a snapshot.
|
|
|
|
:param snapshot: dictionary snapshot reference
|
|
"""
|
|
|
|
loc = snapshot['provider_location']
|
|
|
|
# to take care of spurious input
|
|
if loc is None:
|
|
# which could cause exception.
|
|
return
|
|
|
|
(arid, lun) = loc.split('.')
|
|
source_vol = self._id_to_vol(snapshot['volume_id'])
|
|
service = self._get_service(source_vol)
|
|
(_ip, _ipp, _ctl, _port, hdp, target, secret) = service
|
|
myid = self.arid
|
|
|
|
if arid != myid:
|
|
LOG.error(_LE('Array mismatch %(myid)s vs %(arid)s')
|
|
% {'myid': myid,
|
|
'arid': arid})
|
|
msg = 'Array id mismatch in delete snapshot'
|
|
raise exception.VolumeBackendAPIException(data=msg)
|
|
self.bend.delete_lu(self.config['hnas_cmd'],
|
|
self.config['mgmt_ip0'],
|
|
self.config['username'],
|
|
self.config['password'],
|
|
hdp, lun)
|
|
|
|
LOG.debug("LUN %s is deleted.", lun)
|
|
return
|
|
|
|
def get_volume_stats(self, refresh=False):
|
|
"""Get volume stats. If 'refresh', run update the stats first."""
|
|
|
|
if refresh:
|
|
self.driver_stats = self._get_stats()
|
|
|
|
return self.driver_stats
|