def connect_volume(self, target_portal, target_iqn, target_lun):
""":raises: CannotConnectISCSIVolume if volume is not available or
cannot be connected"""
connect_cmd = ('iscsiadm '
'-m node '
'-T {target_iqn} '
'-p {target_portal}').format(
target_iqn=target_iqn, target_portal=target_portal)
password = self.sudo_password
local.sudo_ignoring_errors(connect_cmd, sudo_password=password)
sessions = self.get_sessions()
if len(sessions) == 0 or not any(
(s.target_portal == target_portal for s in sessions)):
try:
local.sudo(connect_cmd + ' --login', sudo_password=password)
finally:
update = ' --op update -n node.startup -v automatic'
local.sudo_ignoring_errors(connect_cmd + update)
device_path = get_device_path(target_portal, target_iqn, target_lun)
if not self._path_exists(device_path, target_portal, target_iqn):
msg = "iSCSI volume not found at {host_device}".format(
host_device=device_path)
LOG.error(msg)
raise CannotConnectISCSIVolume(msg)
return device_path
def connect_volume(self, target_portal, target_iqn, target_lun):
""":raises: CannotConnectISCSIVolume if volume is not available or
cannot be connected"""
connect_cmd = ('iscsiadm '
'-m node '
'-T {target_iqn} '
'-p {target_portal}').format(
target_iqn=target_iqn, target_portal=target_portal)
password = self.sudo_password
local.sudo_ignoring_errors(connect_cmd, sudo_password=password)
sessions = self.get_sessions()
if len(sessions) == 0 or not any((s.target_portal == target_portal
for s in sessions)):
try:
local.sudo(connect_cmd + ' --login', sudo_password=password)
finally:
update = ' --op update -n node.startup -v automatic'
local.sudo_ignoring_errors(connect_cmd + update)
device_path = get_device_path(target_portal, target_iqn, target_lun)
if not self._path_exists(device_path, target_portal, target_iqn):
msg = "iSCSI volume not found at {host_device}"
LOG.error(msg.format(host_device=device_path))
raise CannotConnectISCSIVolume(msg)
return device_path
def check_path_and_rescan():
# The rescan isn't documented as being necessary(?), but it helps
try:
rescan = "iscsiadm -m node -T {iqn} -p {portal} --rescan"
local.sudo(rescan.format(iqn=target_iqn, portal=target_portal))
except local.LocalExecutionFailed as e:
LOG.debug("Rescan failed with %d: %s", e.code, e.message)
return local.sudo("test -e {path}".format(path=path))
def check_path_and_rescan():
# The rescan isn't documented as being necessary(?), but it helps
try:
rescan = "iscsiadm -m node -T {iqn} -p {portal} --rescan"
local.sudo(rescan.format(iqn=target_iqn, portal=target_portal))
except local.LocalExecutionFailed as e:
LOG.debug("Rescan failed with %d: %s", e.code, e.message)
return local.sudo("test -e {path}".format(path=path))
def discover(self, portal):
discover = 'iscsiadm -m discovery -t sendtargets -p {portal}'
discovered = local.sudo(
discover.format(portal=portal),
sudo_password=self.sudo_password)
if discovered:
return [VolumeParams.from_iscsiadm_string(s)
for s in discovered.splitlines()]
def discover(self, portal):
discover = 'iscsiadm -m discovery -t sendtargets -p {portal}'
discovered = local.sudo(discover.format(portal=portal),
sudo_password=self.sudo_password)
if discovered:
return [
VolumeParams.from_iscsiadm_string(s)
for s in discovered.splitlines()
]
def rescan_iscsi():
local.sudo('iscsiadm -m node --rescan')
local.sudo('iscsiadm -m session --rescan')
def remove_iscsi_device(dev_name):
path = "/sys/block/%s/device/delete" % dev_name.replace("/dev/", "")
if os.path.exists(path):
flush_device_io(dev_name)
local.sudo("echo 1 > {path}".format(path=path))
def flush_device_io(device):
local.sudo('blockdev --flushbufs {device}'.format(device=device))
def rescan_iscsi():
local.sudo('iscsiadm -m node --rescan')
local.sudo('iscsiadm -m session --rescan')
def flush_device_io(device):
local.sudo('blockdev --flushbufs {device}'.format(device=device))
