def loginIscsiTarget(paths):
def have_devices():
return all(map(os.path.exists, paths))
if have_devices():
logger.debug("loginIscsiTarget: nothing to do")
return
pdskid_str = extract_pdskid_from_iscsi_path(paths[0])
iqn = "iqn.%s:%s" % (iqn_prefix_iscsi, pdskid_str)
def login(path):
ip_str = extract_ip_from_iscsi_path(path)
logger.debug("iscsi new: iqn %s portal %s path %s" % (iqn, ip_str, path))
assert pdskid_str == extract_pdskid_from_iscsi_path(path)
executeiscsiadm("iscsiadm -m node -o new -T %s -p %s" % (iqn, ip_str))
map(login, paths)
logger.debug("iscsi login: iqn %s" % iqn)
command = "iscsiadm -m node -T %s --login" % iqn
def condition():
return not have_devices()
executecommand_retry(command, condition, ISCSIADM_RETRY_TIMES)
time_left = LOGIN_TIMEOUT
while not have_devices() and time_left > 0:
time_left -= 1
time.sleep(1)
map(getMultiPathDevice, paths)
def getMultiPathDevice(dev_disk_by_path):
# input: /dev/disk/by-path/ip-10.100.10.3:3260-iscsi-iqn.2000-11.jp.co.valinux:00000006-lun-1
# output: /dev/mapper/mpath5
dev_path = ""
# iSCSI device path --> wwid
wwid = ""
command = "scsi_id -g -u /dev/%s" % os.path.realpath(dev_disk_by_path).split("/dev/")[1]
def condition():
return os.path.exists(dev_disk_by_path)
wwid = executecommand_retry(command, condition, SCSI_ID_RETRY_TIMES)
# wwid --> Multipath device path
dev_name = ""
for i in range(0, GETMULTIPATHDEVICE_RETRY_TIMES):
try:
executecommand("multipath")
dev_name = executecommand("dmsetup info --noheadings -c -u mpath-%s -o name" % (wwid))
return getDmDevPath(dev_name)
except:
time.sleep(GETMULTIPATHDEVICE_RETRY_INTERVAL)
logger.error("getMultiPathDevice: multipath -v3: %s", executecommand("multipath -v3"))
raise Exception, "retry over"
