def _rollback_on_failure(self, iface):
''' Called by the Timer in a new thread to cancel wrong network
configuration and rollback to previous configuration. '''
conn = LibvirtConnection("qemu:///system").get()
try:
conn.changeRollback()
if iface.isActive():
iface.destroy()
iface.create()
except libvirt.libvirtError as e:
# In case the timeout thread is preempted, and confirm_change() is
# called before our changeRollback(), we can just ignore the
# VIR_ERR_OPERATION_INVALID error.
if e.get_error_code() != libvirt.VIR_ERR_OPERATION_INVALID:
raise
def _rollback_on_failure(self, iface):
''' Called by the Timer in a new thread to cancel wrong network
configuration and rollback to previous configuration. '''
conn = LibvirtConnection("qemu:///system").get()
try:
conn.changeRollback()
if iface.isActive():
iface.destroy()
iface.create()
except libvirt.libvirtError as e:
# In case the timeout thread is preempted, and confirm_change() is
# called before our changeRollback(), we can just ignore the
# VIR_ERR_OPERATION_INVALID error.
if e.get_error_code() != libvirt.VIR_ERR_OPERATION_INVALID:
raise
def _create_libvirt_network_iface(self, iface_xml):
conn = LibvirtConnection("qemu:///system").get()
# Only one active transaction is allowed in the system level.
# It implies that we can use changeBegin() as a synchronized point.
conn.changeBegin()
try:
iface = conn.interfaceDefineXML(iface_xml)
self._rollback_timer = Timer(
self._confirm_timout, self._rollback_on_failure, args=[iface])
if iface.isActive():
iface.destroy()
iface.create()
self._rollback_timer.start()
except Exception as e:
conn.changeRollback()
raise OperationFailed('GINNET0004E', {'err': e.message})
def _rollback_on_failure(self, gateway):
_, err, rc = run_command(['ip', 'route', 'del', 'default'])
if rc and not ('No such process' in err):
raise OperationFailed('GINNET0010E', {'reason': err})
if gateway:
_, err, rc = run_command(
['ip', 'route', 'add', 'default', 'via', gateway])
if rc:
raise OperationFailed('GINNET0011E', {'reason': err})
conn = LibvirtConnection("qemu:///system").get()
try:
conn.changeRollback()
except libvirt.libvirtError as e:
# In case the timeout thread is preempted, and confirm_change() is
# called before our changeRollback(), we can just ignore the
# VIR_ERR_OPERATION_INVALID error.
if e.get_error_code() != libvirt.VIR_ERR_OPERATION_INVALID:
raise
def _rollback_on_failure(self, gateway):
_, err, rc = run_command(['ip', 'route', 'del', 'default'])
if rc and not ('No such process' in err):
raise OperationFailed('GINNET0010E', {'reason': err})
if gateway:
_, err, rc = run_command(['ip', 'route', 'add', 'default', 'via',
gateway])
if rc:
raise OperationFailed('GINNET0011E', {'reason': err})
conn = LibvirtConnection("qemu:///system").get()
try:
conn.changeRollback()
except libvirt.libvirtError as e:
# In case the timeout thread is preempted, and confirm_change() is
# called before our changeRollback(), we can just ignore the
# VIR_ERR_OPERATION_INVALID error.
if e.get_error_code() != libvirt.VIR_ERR_OPERATION_INVALID:
raise
