def _kill_listen_processes(namespace, force=False):
"""Identify all listening processes within the given namespace.
Then, for each one, find its top parent with same cmdline (in case this
process forked) and issue a SIGTERM to all of them. If force is True,
then a SIGKILL will be issued to all parents and all their children. Also,
this function returns the number of listening processes.
"""
pids = find_listen_pids_namespace(namespace)
pids_to_kill = {utils.find_fork_top_parent(pid) for pid in pids}
kill_signal = signal.SIGTERM
if force:
kill_signal = signal.SIGKILL
children = [utils.find_child_pids(pid, True) for pid in pids_to_kill]
pids_to_kill.update(itertools.chain.from_iterable(children))
for pid in pids_to_kill:
# Throw a warning since this particular cleanup may need a specific
# implementation in the right module. Ideally, netns_cleanup wouldn't
# kill any processes as the responsible module should've killed them
# before cleaning up the namespace
LOG.warning(_LW("Killing (%(signal)d) [%(pid)s] %(cmdline)s"),
{'signal': kill_signal,
'pid': pid,
'cmdline': ' '.join(utils.get_cmdline_from_pid(pid))[:80]
})
try:
utils.kill_process(pid, kill_signal, run_as_root=True)
except Exception as ex:
LOG.error(_LE('An error occurred while killing '
'[%(pid)s]: %(msg)s'), {'pid': pid, 'msg': ex})
return len(pids)
def _kill_listen_processes(namespace, force=False):
"""Identify all listening processes within the given namespace.
Then, for each one, find its top parent with same cmdline (in case this
process forked) and issue a SIGTERM to all of them. If force is True,
then a SIGKILL will be issued to all parents and all their children. Also,
this function returns the number of listening processes.
"""
pids = find_listen_pids_namespace(namespace)
pids_to_kill = {utils.find_fork_top_parent(pid) for pid in pids}
kill_signal = signal.SIGTERM
if force:
kill_signal = signal.SIGKILL
children = [utils.find_child_pids(pid, True) for pid in pids_to_kill]
pids_to_kill.update(itertools.chain.from_iterable(children))
for pid in pids_to_kill:
# Throw a warning since this particular cleanup may need a specific
# implementation in the right module. Ideally, netns_cleanup wouldn't
# kill any processes as the responsible module should've killed them
# before cleaning up the namespace
LOG.warning("Killing (%(signal)d) [%(pid)s] %(cmdline)s",
{'signal': kill_signal,
'pid': pid,
'cmdline': ' '.join(utils.get_cmdline_from_pid(pid))[:80]
})
try:
utils.kill_process(pid, kill_signal, run_as_root=True)
except Exception as ex:
LOG.error('An error occurred while killing '
'[%(pid)s]: %(msg)s', {'pid': pid, 'msg': ex})
return len(pids)
def _test_find_fork_top_parent(
self, expected=_marker, find_parent_pid_retvals=None, pid_invoked_with_cmdline_retvals=None
):
def _find_parent_pid(x):
if find_parent_pid_retvals:
return find_parent_pid_retvals.pop(0)
pid_invoked_with_cmdline = {}
if pid_invoked_with_cmdline_retvals:
pid_invoked_with_cmdline["side_effect"] = pid_invoked_with_cmdline_retvals
else:
pid_invoked_with_cmdline["return_value"] = False
with mock.patch.object(utils, "find_parent_pid", side_effect=_find_parent_pid), mock.patch.object(
utils, "pid_invoked_with_cmdline", **pid_invoked_with_cmdline
):
actual = utils.find_fork_top_parent(_marker)
self.assertEqual(expected, actual)
def _test_find_fork_top_parent(self, expected=_marker,
find_parent_pid_retvals=None,
pid_invoked_with_cmdline_retvals=None):
def _find_parent_pid(x):
if find_parent_pid_retvals:
return find_parent_pid_retvals.pop(0)
pid_invoked_with_cmdline = {}
if pid_invoked_with_cmdline_retvals:
pid_invoked_with_cmdline['side_effect'] = (
pid_invoked_with_cmdline_retvals)
else:
pid_invoked_with_cmdline['return_value'] = False
with mock.patch.object(utils, 'find_parent_pid',
side_effect=_find_parent_pid), \
mock.patch.object(utils, 'pid_invoked_with_cmdline',
**pid_invoked_with_cmdline):
actual = utils.find_fork_top_parent(_marker)
self.assertEqual(expected, actual)
