def test_is_called_every_interval(self):
clock = Clock()
service = DHCPProbeService(sentinel.service, clock)
# Avoid actually probing
probe_dhcp = self.patch(service, "probe_dhcp")
# Until the service has started, periodicprobe_dhcp() won't
# be called.
self.assertThat(probe_dhcp, MockNotCalled())
# The first call is issued at startup.
service.startService()
self.assertThat(probe_dhcp, MockCalledOnceWith())
# Wind clock forward one second less than the desired interval.
clock.advance(service.check_interval - 1)
# No more periodic calls made.
self.assertEqual(1, len(get_mock_calls(probe_dhcp)))
# Wind clock forward one second, past the interval.
clock.advance(1)
# Now there were two calls.
self.assertThat(get_mock_calls(probe_dhcp), HasLength(2))
def test_logs_errors(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {
interface_name: {
"enabled": True,
"links": [{
"address": "10.0.0.1/24"
}],
}
}
maaslog = self.patch(dhcp_probe_service, "maaslog")
mock_interfaces = self.patch(dhcp_probe_service,
"get_all_interfaces_definition")
mock_interfaces.return_value = interfaces
service = DHCPProbeService(sentinel.service, clock)
error_message = factory.make_string()
self.patch(service,
"probe_dhcp").side_effect = Exception(error_message)
with TwistedLoggerFixture() as logger:
service.startService()
self.assertThat(
maaslog.error,
MockCalledOnceWith("Unable to probe for DHCP servers: %s",
error_message),
)
self.assertThat(
logger.output,
DocTestMatches("Running periodic DHCP probe.\n..."
"Unable to probe for DHCP servers.\n..."
"Traceback... "),
)
def _makeDHCPProbeService(self, rpc_service):
from provisioningserver.rackdservices.dhcp_probe_service \
import DHCPProbeService
dhcp_probe_service = DHCPProbeService(
rpc_service, reactor)
dhcp_probe_service.setName("dhcp_probe")
return dhcp_probe_service
def test_reports_lack_of_foreign_dhcp_servers_to_region(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {
interface_name: {
"enabled": True,
"links": [{
"address": "10.0.0.1/24"
}]
}
}
protocol, connecting = self.patch_rpc_methods()
self.addCleanup((yield connecting))
deferToThread = self.patch(dhcp_probe_service, 'deferToThread')
deferToThread.side_effect = [
defer.succeed(interfaces),
]
probe_interface = self.patch(dhcp_probe_service, 'probe_interface')
probe_interface.return_value = []
client = getRegionClient()
rpc_service = Mock()
rpc_service.getClientNow.return_value = defer.succeed(client)
service = DHCPProbeService(rpc_service, clock)
yield service.startService()
yield service.stopService()
self.assertThat(
protocol.ReportForeignDHCPServer,
MockCalledOnceWith(protocol,
system_id=client.localIdent,
interface_name=interface_name,
dhcp_ip=None))
def test_skips_unconfigured_interfaces(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {interface_name: {"enabled": True, "links": []}}
mock_interfaces = self.patch(dhcp_probe_service,
"get_all_interfaces_definition")
mock_interfaces.return_value = interfaces
service = DHCPProbeService(sentinel.service, clock)
try_get_client = self.patch(service, "_tryGetClient")
try_get_client.getClientNow = Mock()
probe_interface = self.patch(dhcp_probe_service, "probe_interface")
yield service.startService()
yield service.stopService()
self.assertThat(probe_interface, MockNotCalled())
def test_probes_ipv4_interfaces(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {
interface_name: {
"enabled": True,
"links": [{"address": "10.0.0.1/24"}],
}
}
mock_interfaces = self.patch(
dhcp_probe_service, "get_all_interfaces_definition"
)
mock_interfaces.return_value = interfaces
service = DHCPProbeService(sentinel.service, clock)
try_get_client = self.patch(service, "_tryGetClient")
try_get_client.getClientNow = Mock()
probe_interface = self.patch(dhcp_probe_service, "probe_interface")
yield service.startService()
yield service.stopService()
self.assertThat(probe_interface, MockCalledOnce())
def test_skips_ipv6_interfaces(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {
interface_name: {
"enabled": True,
"links": [{
"address": "2001:db8::1/64"
}]
}
}
mock_interfaces = self.patch(dhcp_probe_service,
'get_all_interfaces_definition')
mock_interfaces.return_value = interfaces
service = DHCPProbeService(sentinel.service, clock)
try_get_client = self.patch(service, '_tryGetClient')
try_get_client.getClientNow = Mock()
probe_interface = self.patch(dhcp_probe_service, 'probe_interface')
yield service.startService()
yield service.stopService()
self.assertThat(probe_interface, MockNotCalled())
def test_exits_gracefully_if_cant_report_foreign_dhcp_server(self):
clock = Clock()
interface_name = factory.make_name("eth")
interfaces = {
interface_name: {
"enabled": True,
"links": [{
"address": "10.0.0.1/24"
}]
}
}
maaslog = self.patch(dhcp_probe_service, 'maaslog')
deferToThread = self.patch(dhcp_probe_service, 'deferToThread')
deferToThread.side_effect = [
defer.succeed(interfaces),
]
probe_interface = self.patch(dhcp_probe_service, 'probe_interface')
probe_interface.return_value = ['192.168.0.100']
protocol, connecting = self.patch_rpc_methods()
self.addCleanup((yield connecting))
del protocol._commandDispatch[
region.ReportForeignDHCPServer.commandName]
rpc_service = Mock()
rpc_service.getClientNow.return_value = defer.succeed(
getRegionClient())
service = DHCPProbeService(rpc_service, clock)
yield service.startService()
yield service.stopService()
self.assertThat(
maaslog.error,
MockCalledOnceWith(
"Unable to inform region of DHCP server: the region "
"does not yet support the ReportForeignDHCPServer RPC "
"method."))
