def attach(self, sr_uuid):
self._mpathHandle()
multiTargets = False
npaths = 0
try:
pbdref = util.find_my_pbd(self.session, self.host_ref, self.sr_ref)
if pbdref:
other_config = self.session.xenapi.PBD.get_other_config(pbdref)
multiTargets = util.sessions_less_than_targets(
other_config, self.dconf)
except:
pass
if not self.attached or multiTargets:
# Verify iSCSI target and port
if 'multihomelist' in self.dconf and 'multiSession' not in self.dconf:
targetlist = self.dconf['multihomelist'].split(',')
else:
targetlist = ['%s:%d' % (self.target, self.port)]
conn = False
for val in targetlist:
(target, port) = iscsilib.parse_IP_port(val)
try:
util._testHost(target, long(port), 'ISCSITarget')
self.target = target
self.port = long(port)
conn = True
break
except:
pass
if not conn:
raise xs_errors.XenError('ISCSITarget')
# Test and set the initiatorname file
iscsilib.ensure_daemon_running_ok(self.localIQN)
# Check to see if auto attach was set
if not iscsilib._checkTGT(self.targetIQN) or multiTargets:
try:
map = []
if 'any' != self.targetIQN:
try:
map = iscsilib.get_node_records(self.targetIQN)
except:
# Pass the exception that is thrown, when there
# are no nodes
pass
if len(map) == 0:
map = iscsilib.discovery(
self.target, self.port, self.chapuser,
self.chappassword, self.targetIQN,
iscsilib.get_iscsi_interfaces())
if len(map) == 0:
self._scan_IQNs()
raise xs_errors.XenError(
'ISCSIDiscovery', opterr='check target settings')
for i in range(0, len(map)):
(portal, tpgt, iqn) = map[i]
try:
(ipaddr, port) = iscsilib.parse_IP_port(portal)
if not self.multihomed and ipaddr != self.target:
continue
util._testHost(ipaddr, long(port), 'ISCSITarget')
util.SMlog("Logging in to [%s:%s]" %
(ipaddr, port))
iscsilib.login(portal, iqn, self.chapuser,
self.chappassword,
self.incoming_chapuser,
self.incoming_chappassword,
self.mpath == "true")
npaths = npaths + 1
except Exception as e:
# Exceptions thrown in login are acknowledged,
# the rest of exceptions are ignored since some of the
# paths in multipath may not be reachable
if str(e).startswith('ISCSI login'):
raise
else:
pass
if not iscsilib._checkTGT(self.targetIQN):
raise xs_errors.XenError('ISCSIDevice', \
opterr='during login')
# Allow the devices to settle
time.sleep(5)
except util.CommandException as inst:
raise xs_errors.XenError('ISCSILogin', \
opterr='code is %d' % inst.code)
self.attached = True
self._initPaths()
util._incr_iscsiSR_refcount(self.targetIQN, sr_uuid)
IQNs = []
if "multiSession" in self.dconf:
IQNs = ""
for iqn in self.dconf['multiSession'].split("|"):
if len(iqn): IQNs += iqn.split(',')[2]
else:
IQNs.append(self.targetIQN)
sessions = 0
paths = iscsilib.get_IQN_paths()
for path in paths:
try:
if util.get_single_entry(os.path.join(path,
'targetname')) in IQNs:
sessions += 1
util.SMlog("IQN match. Incrementing sessions to %d" %
sessions)
except:
util.SMlog("Failed to read targetname path," \
+ "iscsi_sessions value may be incorrect")
if pbdref:
# Just to be safe in case of garbage left during crashes
# we remove the key and add it
self.session.xenapi.PBD.remove_from_other_config(
pbdref, "iscsi_sessions")
self.session.xenapi.PBD.add_to_other_config(
pbdref, "iscsi_sessions", str(sessions))
if 'SCSIid' in self.dconf:
if self.mpath == 'true':
self.mpathmodule.refresh(self.dconf['SCSIid'], 0)
devs = os.listdir("/dev/disk/by-scsid/%s" % self.dconf['SCSIid'])
for dev in devs:
realdev = os.path.realpath("/dev/disk/by-scsid/%s/%s" %
(self.dconf['SCSIid'], dev))
util.set_scheduler(realdev.split("/")[-1], "noop")
else:
pass
if not iscsilib._checkTGT(self.targetIQN):
raise xs_errors.XenError('ISCSIDevice', \
opterr='during login')
# Allow the devices to settle
time.sleep(5)
except util.CommandException, inst:
raise xs_errors.XenError('ISCSILogin', \
opterr='code is %d' % inst.code)
self.attached = True
self._initPaths()
util._incr_iscsiSR_refcount(self.targetIQN, sr_uuid)
IQNs = []
if self.dconf.has_key("multiSession"):
IQNs = ""
for iqn in self.dconf['multiSession'].split("|"):
if len(iqn): IQNs += iqn.split(',')[2]
else:
IQNs.append(self.targetIQN)
sessions = 0
paths = iscsilib.get_IQN_paths()
for path in paths:
try:
if util.get_single_entry(os.path.join(path,
'targetname')) in IQNs:
sessions += 1
util.SMlog("IQN match. Incrementing sessions to %d" %
else:
pass
if not iscsilib._checkTGT(self.targetIQN):
raise xs_errors.XenError('ISCSIDevice', \
opterr='during login')
# Allow the devices to settle
time.sleep(5)
except util.CommandException, inst:
raise xs_errors.XenError('ISCSILogin', \
opterr='code is %d' % inst.code)
self.attached = True
self._initPaths()
util._incr_iscsiSR_refcount(self.targetIQN, sr_uuid)
IQNs = []
if self.dconf.has_key("multiSession"):
IQNs = ""
for iqn in self.dconf['multiSession'].split("|"):
if len(iqn): IQNs += iqn.split(',')[2]
else:
IQNs.append(self.targetIQN)
sessions = 0
paths = iscsilib.get_IQN_paths()
for path in paths:
try:
if util.get_single_entry(os.path.join(path, 'targetname')) in IQNs:
sessions += 1
util.SMlog("IQN match. Incrementing sessions to %d" % sessions)
except:
class ISCSISR(SR.SR):
"""ISCSI storage repository"""
def handles(type):
if type == "iscsi":
return True
return False
handles = staticmethod(handles)
def _synchroniseAddrList(self, addrlist):
if not self.multihomed:
return
change = False
if not self.dconf.has_key('multihomelist'):
change = True
self.mlist = []
mstr = ""
else:
self.mlist = self.dconf['multihomelist'].split(',')
mstr = self.dconf['multihomelist']
for val in addrlist:
if not val in self.mlist:
self.mlist.append(val)
if len(mstr):
mstr += ","
mstr += val
change = True
if change:
pbd = None
try:
pbd = util.find_my_pbd(self.session, self.host_ref,
self.sr_ref)
if pbd <> None:
device_config = self.session.xenapi.PBD.get_device_config(
pbd)
device_config['multihomelist'] = mstr
self.session.xenapi.PBD.set_device_config(
pbd, device_config)
except:
pass
def load(self, sr_uuid):
self.sr_vditype = 'phy'
self.discoverentry = 0
self.default_vdi_visibility = False
# Required parameters
if not self.dconf.has_key('target') or not self.dconf['target']:
raise xs_errors.XenError('ConfigTargetMissing')
# we are no longer putting hconf in the xml.
# Instead we pass a session and host ref and let the SM backend query XAPI itself
try:
if not self.dconf.has_key('localIQN'):
self.localIQN = self.session.xenapi.host.get_other_config(
self.host_ref)['iscsi_iqn']
else:
self.localIQN = self.dconf['localIQN']
except:
raise xs_errors.XenError('ConfigISCSIIQNMissing')
# Check for empty string
if not self.localIQN:
raise xs_errors.XenError('ConfigISCSIIQNMissing')
try:
self.target = util._convertDNS(self.dconf['target'].split(',')[0])
except:
raise xs_errors.XenError('DNSError')
self.targetlist = self.target
if self.dconf.has_key('targetlist'):
self.targetlist = self.dconf['targetlist']
# Optional parameters
self.chapuser = ""
self.chappassword = ""
if self.dconf.has_key('chapuser') \
and (self.dconf.has_key('chappassword') or self.dconf.has_key('chappassword_secret')):
self.chapuser = self.dconf['chapuser']
if self.dconf.has_key('chappassword_secret'):
self.chappassword = util.get_secret(
self.session, self.dconf['chappassword_secret'])
else:
self.chappassword = self.dconf['chappassword']
self.incoming_chapuser = ""
self.incoming_chappassword = ""
if self.dconf.has_key('incoming_chapuser') \
and (self.dconf.has_key('incoming_chappassword') or self.dconf.has_key('incoming_chappassword_secret')):
self.incoming_chapuser = self.dconf['incoming_chapuser']
if self.dconf.has_key('incoming_chappassword_secret'):
self.incoming_chappassword = util.get_secret(
self.session, self.dconf['incoming_chappassword_secret'])
else:
self.incoming_chappassword = self.dconf[
'incoming_chappassword']
self.port = DEFAULT_PORT
if self.dconf.has_key('port') and self.dconf['port']:
try:
self.port = long(self.dconf['port'])
except:
raise xs_errors.XenError('ISCSIPort')
if self.port > MAXPORT or self.port < 1:
raise xs_errors.XenError('ISCSIPort')
# For backwards compatibility
if self.dconf.has_key('usediscoverynumber'):
self.discoverentry = self.dconf['usediscoverynumber']
self.multihomed = False
if self.dconf.has_key('multihomed'):
if self.dconf['multihomed'] == "true":
self.multihomed = True
elif self.mpath == 'true':
self.multihomed = True
if not self.dconf.has_key('targetIQN') or not self.dconf['targetIQN']:
self._scan_IQNs()
raise xs_errors.XenError('ConfigTargetIQNMissing')
self.targetIQN = self.dconf['targetIQN']
self.attached = False
try:
self.attached = iscsilib._checkTGT(self.targetIQN)
except:
pass
self._initPaths()
def _initPaths(self):
self._init_adapters()
# Generate a list of all possible paths
self.pathdict = {}
addrlist = []
rec = {}
key = "%s:%d" % (self.target, self.port)
rec['ipaddr'] = self.target
rec['port'] = self.port
rec['path'] = os.path.join("/dev/iscsi",self.targetIQN,\
key)
self.pathdict[key] = rec
util.SMlog("PATHDICT: key %s: %s" % (key, rec))
self.tgtidx = key
addrlist.append(key)
self.path = rec['path']
self.address = self.tgtidx
if not self.attached:
return
if self.multihomed:
map = iscsilib.get_node_records(targetIQN=self.targetIQN)
for i in range(0, len(map)):
(portal, tpgt, iqn) = map[i]
(ipaddr, port) = portal.split(',')[0].split(':')
if self.target != ipaddr:
key = "%s:%s" % (ipaddr, port)
rec = {}
rec['ipaddr'] = ipaddr
rec['port'] = long(port)
rec['path'] = os.path.join("/dev/iscsi",self.targetIQN,\
key)
self.pathdict[key] = rec
util.SMlog("PATHDICT: key %s: %s" % (key, rec))
addrlist.append(key)
# Try to detect an active path in order of priority
for key in self.pathdict:
if self.adapter.has_key(key):
self.tgtidx = key
self.path = self.pathdict[self.tgtidx]['path']
if os.path.exists(self.path):
util.SMlog("Path found: %s" % self.path)
break
self.address = self.tgtidx
self._synchroniseAddrList(addrlist)
def _init_adapters(self):
# Generate a list of active adapters
ids = scsiutil._genHostList(ISCSI_PROCNAME)
util.SMlog(ids)
self.adapter = {}
for host in ids:
try:
targetIQN = util.get_single_entry(glob.glob(\
'/sys/class/iscsi_host/host%s/device/session*/iscsi_session*/targetname' % host)[0])
if targetIQN != self.targetIQN:
continue
addr = util.get_single_entry(glob.glob(\
'/sys/class/iscsi_host/host%s/device/session*/connection*/iscsi_connection*/persistent_address' % host)[0])
port = util.get_single_entry(glob.glob(\
'/sys/class/iscsi_host/host%s/device/session*/connection*/iscsi_connection*/persistent_port' % host)[0])
entry = "%s:%s" % (addr, port)
self.adapter[entry] = host
except:
pass
self.devs = scsiutil.cacheSCSIidentifiers()
def attach(self, sr_uuid):
self._mpathHandle()
npaths = 0
if not self.attached:
# Verify iSCSI target and port
if self.dconf.has_key('multihomelist'
) and not self.dconf.has_key('multiSession'):
targetlist = self.dconf['multihomelist'].split(',')
else:
targetlist = ['%s:%d' % (self.target, self.port)]
conn = False
for val in targetlist:
(target, port) = val.split(':')
try:
util._testHost(target, long(port), 'ISCSITarget')
self.target = target
self.port = long(port)
conn = True
break
except:
pass
if not conn:
raise xs_errors.XenError('ISCSITarget')
# Test and set the initiatorname file
iscsilib.ensure_daemon_running_ok(self.localIQN)
# Check to see if auto attach was set
if not iscsilib._checkTGT(self.targetIQN):
try:
map = iscsilib.discovery(self.target, self.port, self.chapuser, \
self.chappassword, targetIQN=self.targetIQN)
iqn = ''
if len(map) == 0:
self._scan_IQNs()
raise xs_errors.XenError(
'ISCSIDiscovery', opterr='check target settings')
for i in range(0, len(map)):
(portal, tpgt, iqn) = map[i]
try:
(ipaddr, port) = portal.split(',')[0].split(':')
if not self.multihomed and ipaddr != self.target:
continue
util._testHost(ipaddr, long(port), 'ISCSITarget')
util.SMlog("Logging in to [%s:%s]" %
(ipaddr, port))
iscsilib.login(portal, iqn, self.chapuser,
self.chappassword,
self.incoming_chapuser,
self.incoming_chappassword)
npaths = npaths + 1
except:
pass
if not iscsilib._checkTGT(self.targetIQN):
raise xs_errors.XenError('ISCSIDevice', \
opterr='during login')
# Allow the devices to settle
time.sleep(5)
except util.CommandException, inst:
raise xs_errors.XenError('ISCSILogin', \
opterr='code is %d' % inst.code)
self.attached = True
self._initPaths()
util._incr_iscsiSR_refcount(self.targetIQN, sr_uuid)
IQNs = []
if self.dconf.has_key("multiSession"):
IQNs = ""
for iqn in self.dconf['multiSession'].split("|"):
if len(iqn): IQNs += iqn.split(',')[2]
else:
IQNs.append(self.targetIQN)
sessions = 0
paths = glob.glob(\
'/sys/class/iscsi_host/host*/device/session*/iscsi_session*/targetname')
for path in paths:
try:
if util.get_single_entry(path) in IQNs:
sessions += 1
util.SMlog("IQN match. Incrementing sessions to %d" %
sessions)
except:
util.SMlog("Failed to read targetname path," \
+ "iscsi_sessions value may be incorrect")
try:
pbdref = util.find_my_pbd(self.session, self.host_ref, self.sr_ref)
if pbdref <> None:
other_conf = self.session.xenapi.PBD.get_other_config(pbdref)
other_conf['iscsi_sessions'] = str(sessions)
self.session.xenapi.PBD.set_other_config(pbdref, other_conf)
except:
pass
if self.mpath == 'true' and self.dconf.has_key('SCSIid'):
self.mpathmodule.refresh(self.dconf['SCSIid'], npaths)