def _create_event_triggers(self):
triggers = self._config["triggers"]
sup_tr = triggers["support"]
user_support = ev.Trigger(
prob_check=pck.ProbCheck(sup_tr["get_called"]),
node_check=dck.AnyDepCheck(dck.NeqCheck("run")),
event_builder=ev.EventBuilder(
"User complained for poor web service"))
webs1 = ev.Trigger(
node_check=dck.OrCheck(
dck.EqCheck("stop"), dck.DepCheck(dck.EqCheck("off")),
dck.DepCheck(dck.DepCheck(dck.EqCheck("off")))),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder("Application is down"))
webs2 = ev.Trigger(
node_check=dck.EqCheck("slow"),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder("Application is slow"))
host = ev.Trigger(
node_check=dck.OrCheck(dck.EqCheck("off"),
dck.DepCheck(dck.EqCheck("off"))),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder("Host is unreachable or down"))
switch = ev.Trigger(
node_check=dck.EqCheck("off"),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder("Switch is unreachable or down"))
return {
"switch": switch,
"host": host,
"web_service": [webs1, webs2],
"support": user_support
}
def _create_system(self):
mc = tr.MarkovChain([])
vm_triggers = [
ev.Trigger(
event_builder=MonascaFakeMetricBuilder("vm.mem.used_mb"),
node_check=dck.TrueCheck(),
prob_check=pck.NoProbCheck()),
ev.Trigger(event_builder=MonascaFakeMetricBuilder("cpu.idle_perc"),
node_check=dck.TrueCheck(),
prob_check=pck.NoProbCheck()),
ev.Trigger(event_builder=MonascaFakeMetricBuilder(
"cpu.total_logical_cores"),
node_check=dck.TrueCheck(),
prob_check=pck.NoProbCheck())
]
host_trigger = ev.Trigger(
event_builder=MonascaFakeMetricBuilder("mem.total_mb"),
node_check=dck.TrueCheck(),
prob_check=pck.NoProbCheck())
return [
# vm.mem.used_mb
base.StateNode(3, mc, vm_triggers[0], _id="vm1"),
base.StateNode(1, mc, vm_triggers[0], _id="vm2"),
# cpu.idle_perc
base.StateNode(0.75, mc, vm_triggers[1], _id="vm1"),
base.StateNode(0.75, mc, vm_triggers[1], _id="vm2"),
# cpu.total_logical_cores
base.StateNode(3, mc, vm_triggers[2], _id="vm1"),
base.StateNode(2, mc, vm_triggers[2], _id="vm2"),
# mem.total_mb
base.StateNode(5, mc, host_trigger, _id="host1"),
base.StateNode(6, mc, host_trigger, _id="host2"),
]
def _create_trigger(self, prob, state, event_msg):
"""Aux function to create an event trigger
:param prob: float between 0 and 1 -- probability of the event
being triggered
:param state: str -- State where this event can be triggered
:param event_msg: str -- message that will be sent for this event
"""
return events.Trigger(prob_check=pck.ProbCheck(prob),
node_check=dck.EqCheck(state),
event_builder=events.EventBuilder(event_msg))
def test_collect_events_should_be_populated_by_trigger(self):
some_trigger = ev.Trigger(
node_check=dck.EqCheck(0),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder("test")
)
node = base.StateNode(0, None, some_trigger)
events = []
node.collect_events(1, datetime.datetime.now(),
markov_mocks.MockRequestBuilder(events))
self.assertTrue(len(events) == 1)
self.assertEqual(events[0]["event"].msg, "test", "a")
def test_trigger_should_create_event_when_necessary(self):
some_trigger = ev.Trigger(node_check=dck.EqCheck(0),
prob_check=pck.NoProbCheck(),
event_builder=ev.EventBuilder(""))
events = []
some_trigger.apply_on(DummyState(), 1, datetime.datetime.now(),
markov_mocks.MockRequestBuilder(events))
self.assertEqual(len(events), 1)
events = []
some_trigger.apply_on(DummyState(1), 1, datetime.datetime.now(),
markov_mocks.MockRequestBuilder(events))
self.assertEqual(len(events), 0)
