def test_stale_locks_recycled_pid(self, mock_kill):
"""Publisher starts with stale lock pointing to recycled process."""
mock_kill.side_effect = [
OSError(errno.EPERM, "Operation not permitted")
]
sock_path = os.path.join(self.config.sockets_path, u"test.sock")
lock_path = u"{}.lock".format(sock_path)
# fake a PID recycled by a known process which isn't landscape (init)
os.symlink("1", lock_path)
component = TestComponent()
# Test the actual Unix reactor implementation. Fakes won't do.
reactor = LandscapeReactor()
publisher = ComponentPublisher(component, reactor, self.config)
# Shouldn't raise the exception.
publisher.start()
# ensure stale lock was replaced
self.assertNotEqual("1", os.readlink(lock_path))
mock_kill.assert_not_called()
self.assertFalse(publisher._port.lockFile.clean)
publisher.stop()
reactor._cleanup()
def test_with_valid_lock(self, mock_kill):
"""Publisher raises lock error if a valid lock is held."""
sock_path = os.path.join(self.config.sockets_path, u"test.sock")
lock_path = u"{}.lock".format(sock_path)
# fake a landscape process
app = self.makeFile(textwrap.dedent("""\
#!/usr/bin/python3
import time
time.sleep(10)
"""),
basename="landscape-manager")
os.chmod(app, 0o755)
call = subprocess.Popen([app])
self.addCleanup(call.terminate)
os.symlink(str(call.pid), lock_path)
component = TestComponent()
# Test the actual Unix reactor implementation. Fakes won't do.
reactor = LandscapeReactor()
publisher = ComponentPublisher(component, reactor, self.config)
with self.assertRaises(CannotListenError):
publisher.start()
# ensure lock was not replaced
self.assertEqual(str(call.pid), os.readlink(lock_path))
mock_kill.assert_called_with(call.pid, 0)
reactor._cleanup()
def test_stale_locks_with_dead_pid(self, mock_kill):
"""Publisher starts with stale lock."""
mock_kill.side_effect = [OSError(errno.ESRCH, "No such process")]
sock_path = os.path.join(self.config.sockets_path, u"test.sock")
lock_path = u"{}.lock".format(sock_path)
# fake a PID which does not exist
os.symlink("-1", lock_path)
component = TestComponent()
# Test the actual Unix reactor implementation. Fakes won't do.
reactor = LandscapeReactor()
publisher = ComponentPublisher(component, reactor, self.config)
# Shouldn't raise the exception.
publisher.start()
# ensure stale lock was replaced
self.assertNotEqual("-1", os.readlink(lock_path))
mock_kill.assert_called_with(-1, 0)
publisher.stop()
reactor._cleanup()