def test_read_request_load_start_stop_start_succeeds(self, _logger):
"""
``read_request_load_scenario`` starts, stops and starts
without collapsing.
"""
c = Clock()
node1 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.1'))
node2 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.2'))
cluster = BenchmarkCluster(
node1.public_address,
lambda reactor: FakeFlockerClient([node1, node2]),
{node1.public_address, node2.public_address},
default_volume_size=DEFAULT_VOLUME_SIZE)
sample_size = 5
s = read_request_load_scenario(c, cluster, sample_size=sample_size)
# Start and stop
s.start()
c.pump(repeat(1, sample_size))
s.stop()
# Start again and verify the scenario succeeds
d = s.start()
c.pump(repeat(1, sample_size))
s.maintained().addBoth(lambda x: self.fail())
d.addCallback(lambda ignored: s.stop())
c.pump(repeat(1, sample_size))
self.successResultOf(d)
def test_read_request_load_succeeds(self, _logger):
"""
``read_request_load_scenario`` starts and stops without collapsing.
"""
c = Clock()
node1 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.1'))
node2 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.2'))
cluster = BenchmarkCluster(
node1.public_address,
lambda reactor: FakeFlockerClient([node1, node2]),
{node1.public_address, node2.public_address},
default_volume_size=DEFAULT_VOLUME_SIZE)
sample_size = 5
s = read_request_load_scenario(c, cluster, sample_size=sample_size)
d = s.start()
# Request rate samples are recorded every second and we need to
# collect enough samples to establish the rate which is defined
# by `sample_size`. Therefore, advance the clock by
# `sample_size` seconds to obtain enough samples.
c.pump(repeat(1, sample_size))
s.maintained().addBoth(lambda x: self.fail())
d.addCallback(lambda ignored: s.stop())
c.pump(repeat(1, sample_size))
self.successResultOf(d)
def make_cluster(self, make_flocker_client):
"""
Create a cluster that can be used by the scenario tests.
"""
node1 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.1'))
node2 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.2'))
return BenchmarkCluster(
node1.public_address,
lambda reactor: make_flocker_client(
FakeFlockerClient([node1, node2]), reactor),
{node1.public_address, node2.public_address},
default_volume_size=DEFAULT_VOLUME_SIZE,
)
def test_scenario_throws_exception_when_already_started(self, _logger):
"""
start method in the ``RequestLoadScenario`` throws a
``RequestScenarioAlreadyStarted`` if the scenario is already started.
"""
c = Clock()
node1 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.1'))
node2 = Node(uuid=uuid4(), public_address=IPAddress('10.0.0.2'))
cluster = BenchmarkCluster(
node1.public_address,
lambda reactor: FakeFlockerClient([node1, node2]),
{node1.public_address, node2.public_address},
default_volume_size=DEFAULT_VOLUME_SIZE)
sample_size = 5
s = read_request_load_scenario(c, cluster, sample_size=sample_size)
s.start()
self.assertRaises(RequestScenarioAlreadyStarted, s.start)
def get_fake_flocker_client_instance(self):
"""
Returns a `FakeFlockerClient` instance with the nodes
defined in the init.
"""
return FakeFlockerClient([self.node1, self.node2])
