def test__buildServices_includes_always_running_services(self):
monitor_service = sms.ServiceMonitorService(
sentinel.client_service, Clock()
)
observed_services = yield monitor_service._buildServices({})
self.assertEquals(
monitor_service.ALWAYS_RUNNING_SERVICES, observed_services
)
def test_init_sets_up_timer_correctly(self):
monitor_service = sms.ServiceMonitorService(sentinel.client_service,
sentinel.clock)
self.assertThat(
monitor_service,
MatchesStructure.byEquality(call=(monitor_service.monitorServices,
(), {}),
step=(30),
client_service=sentinel.client_service,
clock=sentinel.clock))
def test_monitorServices_calls_ensureServices(self):
# Pretend we're in a production environment.
self.patch(sms, "is_dev_environment").return_value = False
monitor_service = sms.ServiceMonitorService(
sentinel.client_service, Clock())
mock_ensureServices = self.patch(service_monitor, "ensureServices")
monitor_service.monitorServices()
self.assertThat(
mock_ensureServices,
MockCalledOnceWith())
def test_reports_services_to_region_when_changed(self):
# Pretend we're in a production environment.
self.patch(sms, "is_dev_environment").return_value = False
protocol, connecting = self.patch_rpc_methods()
self.addCleanup((yield connecting))
class ExampleService(AlwaysOnService):
name = service_name = snap_service_name = (
factory.make_name("service"))
service = ExampleService()
# Inveigle this new service into the service monitor.
self.addCleanup(service_monitor._services.pop, service.name)
service_monitor._services[service.name] = service
state = ServiceState(SERVICE_STATE.ON, "running")
mock_ensureServices = self.patch(service_monitor, "ensureServices")
mock_ensureServices.return_value = succeed({
service.name: state
})
client = getRegionClient()
rpc_service = Mock()
rpc_service.getClientNow.return_value = succeed(client)
monitor_service = sms.ServiceMonitorService(
rpc_service, Clock())
monitor_service._services = yield monitor_service._buildServices({
service.name: state
})
# Force last reported state to dead. That way an update is performed.
orig_cached_services = monitor_service._services
for ser in orig_cached_services:
ser['status'] = 'dead'
yield monitor_service.startService()
yield monitor_service.stopService()
expected_services = list(monitor_service.ALWAYS_RUNNING_SERVICES)
expected_services.append({
"name": service.name,
"status": "running",
"status_info": "",
})
self.assertThat(
protocol.UpdateServices,
MockCalledOnceWith(
protocol,
system_id=client.localIdent,
services=expected_services))
self.assertIsNot(orig_cached_services, monitor_service._services)
def test_monitorServices_does_not_do_anything_in_dev_environment(self):
# Belt-n-braces make sure we're in a development environment.
self.assertTrue(sms.is_dev_environment())
monitor_service = sms.ServiceMonitorService(sentinel.client_service,
Clock())
mock_ensureServices = self.patch(service_monitor, "ensureServices")
with TwistedLoggerFixture() as logger:
monitor_service.monitorServices()
self.assertThat(mock_ensureServices, MockNotCalled())
self.assertDocTestMatches(
"Skipping check of services; they're not running under the "
"supervision of systemd.", logger.output)
def test_buildServices_adds_services_to_always_running_services(self):
monitor_service = sms.ServiceMonitorService(sentinel.client_service,
Clock())
service = self.pick_service()
state = ServiceState(SERVICE_STATE.ON, "running")
observed_services = yield monitor_service._buildServices(
{service.name: state})
expected_services = list(monitor_service.ALWAYS_RUNNING_SERVICES)
expected_services.append({
"name": service.name,
"status": "running",
"status_info": ""
})
self.assertEquals(expected_services, observed_services)
def test_monitorServices_handles_failure(self):
# Pretend we're in a production environment.
self.patch(sms, "is_dev_environment").return_value = False
monitor_service = sms.ServiceMonitorService(
sentinel.client_service, Clock())
mock_ensureServices = self.patch(service_monitor, "ensureServices")
mock_ensureServices.return_value = fail(factory.make_exception())
with TwistedLoggerFixture() as logger:
monitor_service.monitorServices()
self.assertDocTestMatches("""\
Failed to monitor services and update region.
Traceback (most recent call last):
...""", logger.output)
def test_doesnt_reports_services_to_region_when_the_same_status(self):
# Pretend we're in a production environment.
self.patch(sms, "is_dev_environment").return_value = False
protocol, connecting = self.patch_rpc_methods()
self.addCleanup((yield connecting))
class ExampleService(AlwaysOnService):
name = service_name = snap_service_name = (
factory.make_name("service"))
service = ExampleService()
# Inveigle this new service into the service monitor.
self.addCleanup(service_monitor._services.pop, service.name)
service_monitor._services[service.name] = service
state = ServiceState(SERVICE_STATE.ON, "running")
mock_ensureServices = self.patch(service_monitor, "ensureServices")
mock_ensureServices.return_value = succeed({
service.name: state
})
client = getRegionClient()
rpc_service = Mock()
rpc_service.getClientNow.return_value = succeed(client)
monitor_service = sms.ServiceMonitorService(
rpc_service, Clock())
monitor_service._services = yield monitor_service._buildServices({
service.name: state
})
yield monitor_service.startService()
yield monitor_service.stopService()
self.assertThat(
protocol.UpdateServices,
MockNotCalled())
