def test_scheduler_runs():
"""
Verifies that the scheduler successfully launches 3 "no-op" MySQL tasks.
NOTE: Due to the limitation of zake the scheduler's ZK operations are not propagated to
executors in separate processes but they are unit-tested separately.
"""
import mesos.native
# Make sure fake_mysos_executor.pex is available to be fetched by Mesos slave.
assert os.path.isfile('dist/fake_mysos_executor.pex')
storage = FakeStorage(SequentialThreadingHandler())
zk_client = FakeClient(storage=storage)
zk_client.start()
zk_url = "zk://fake_host/home/mysos/clusters"
cluster_name = "test_cluster"
num_nodes = 3
state_provider = LocalStateProvider(safe_mkdtemp())
framework_info = FrameworkInfo(
user=getpass.getuser(),
name="mysos",
checkpoint=False)
state = Scheduler(framework_info)
scheduler = MysosScheduler(
state,
state_provider,
getpass.getuser(),
os.path.abspath("dist/fake_mysos_executor.pex"),
"./fake_mysos_executor.pex",
zk_client,
zk_url,
Amount(40, Time.SECONDS),
"/fakepath",
gen_encryption_key())
scheduler_driver = mesos.native.MesosSchedulerDriver(
scheduler,
framework_info,
"local")
scheduler_driver.start()
# Wait until the scheduler is connected and becomes available.
assert scheduler.connected.wait(30)
scheduler.create_cluster(cluster_name, "mysql_user", num_nodes)
# A slave is promoted to be the master.
deadline(
lambda: wait_for_master(
get_cluster_path(posixpath.join(zk_url, 'discover'), cluster_name),
zk_client),
Amount(40, Time.SECONDS))
assert scheduler_driver.stop() == DRIVER_STOPPED
def test_incompatible_resource_role(self):
scheduler1 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
gen_encryption_key(),
framework_role='mysos'
) # Require 'mysos' but the resources are in '*'.
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
scheduler1.resourceOffers(self._driver, [self._offer])
assert "declineOffer" in self._driver.method_calls
assert len(self._driver.method_calls["declineOffer"]) == 1
# [0][0][1]: [First declineOffer call][The positional args][The first positional arg], which is
# a 'Filters' object.
assert (self._driver.method_calls["declineOffer"][0][0][1].
refuse_seconds == INCOMPATIBLE_ROLE_OFFER_REFUSE_DURATION.as_(
Time.SECONDS))
def test_scheduler_runs():
"""
Verifies that the scheduler successfully launches 3 "no-op" MySQL tasks.
NOTE: Due to the limitation of zake the scheduler's ZK operations are not propagated to
executors in separate processes but they are unit-tested separately.
"""
import mesos.native
# Make sure fake_mysos_executor.pex is available to be fetched by Mesos slave.
assert os.path.isfile('dist/fake_mysos_executor.pex')
storage = FakeStorage(SequentialThreadingHandler())
zk_client = FakeClient(storage=storage)
zk_client.start()
zk_url = "zk://fake_host/home/mysos/clusters"
cluster_name = "test_cluster"
num_nodes = 3
state_provider = LocalStateProvider(safe_mkdtemp())
framework_info = FrameworkInfo(user=getpass.getuser(),
name="mysos",
checkpoint=False)
state = Scheduler(framework_info)
scheduler = MysosScheduler(state, state_provider, getpass.getuser(),
os.path.abspath("dist/fake_mysos_executor.pex"),
"./fake_mysos_executor.pex", zk_client, zk_url,
Amount(40, Time.SECONDS), "/fakepath",
gen_encryption_key())
scheduler_driver = mesos.native.MesosSchedulerDriver(
scheduler, framework_info, "local")
scheduler_driver.start()
# Wait until the scheduler is connected and becomes available.
assert scheduler.connected.wait(30)
scheduler.create_cluster(cluster_name, "mysql_user", num_nodes)
# A slave is promoted to be the master.
deadline(
lambda: wait_for_master(
get_cluster_path(posixpath.join(zk_url, 'discover'), cluster_name),
zk_client), Amount(40, Time.SECONDS))
assert scheduler_driver.stop() == DRIVER_STOPPED
def test_create_cluster_invalid_user(self):
self._scheduler.set_exception(MysosScheduler.InvalidUser())
with pytest.raises(AppError) as e:
self._app.post('/clusters/test_cluster', {
'num_nodes': 3,
'cluster_user': '******'
})
assert e.value.message.startswith('Bad response: 400')
def test_incompatible_resource_role(self):
scheduler1 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
gen_encryption_key(),
framework_role='mysos') # Require 'mysos' but the resources are in '*'.
RootMetrics().register_observable('scheduler', scheduler1)
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
scheduler1.resourceOffers(self._driver, [self._offer])
assert "declineOffer" in self._driver.method_calls
assert len(self._driver.method_calls["declineOffer"]) == 1
# [0][0][1]: [First declineOffer call][The positional args][The first positional arg], which is
# a 'Filters' object.
assert (self._driver.method_calls["declineOffer"][0][0][1].refuse_seconds ==
INCOMPATIBLE_ROLE_OFFER_REFUSE_DURATION.as_(Time.SECONDS))
sample = RootMetrics().sample()
assert sample['scheduler.offers_incompatible_role'] == 1
def test_scheduler_delete_empty_cluster(self):
scheduler_key = gen_encryption_key()
scheduler = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
scheduler_key)
scheduler.registered(self._driver, self._framework_id, object())
_, password = scheduler.create_cluster("cluster1", "mysql_user", 3)
assert len(scheduler._launchers) == 1
# Deleting the cluster before any offer comes in for launching any task.
scheduler.delete_cluster("cluster1", password)
assert len(scheduler._launchers) == 0
def test_scheduler_metrics(self):
scheduler_key = gen_encryption_key()
scheduler = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
scheduler_key)
RootMetrics().register_observable('scheduler', scheduler)
scheduler.registered(self._driver, self._framework_id, object())
scheduler.create_cluster("cluster1",
"mysql_user",
3,
cluster_password='******')
sample = RootMetrics().sample()
assert sample['scheduler.cluster_count'] == 1
assert sample[
'scheduler.total_requested_mem_mb'] == DEFAULT_TASK_MEM.as_(
Data.MB) * 3
assert sample[
'scheduler.total_requested_disk_mb'] == DEFAULT_TASK_DISK.as_(
Data.MB) * 3
assert sample[
'scheduler.total_requested_cpus'] == DEFAULT_TASK_CPUS * 3
scheduler.delete_cluster("cluster1", 'test_password')
sample = RootMetrics().sample()
assert sample['scheduler.cluster_count'] == 0
assert sample['scheduler.total_requested_mem_mb'] == 0
assert sample['scheduler.total_requested_disk_mb'] == 0
assert sample['scheduler.total_requested_cpus'] == 0
def test_scheduler_delete_empty_cluster(self):
scheduler_key = gen_encryption_key()
scheduler = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
scheduler_key)
scheduler.registered(self._driver, self._framework_id, object())
_, password = scheduler.create_cluster("cluster1", "mysql_user", 3)
assert len(scheduler._launchers) == 1
# Deleting the cluster before any offer comes in for launching any task.
scheduler.delete_cluster("cluster1", password)
assert len(scheduler._launchers) == 0
def test_scheduler_recovery(self):
scheduler1 = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
scheduler1.resourceOffers(self._driver, [self._offer])
# One task is launched for one offer.
assert len(scheduler1._launchers["cluster1"]._cluster.tasks) == 1
with pytest.raises(MysosScheduler.ClusterExists):
scheduler1.create_cluster("cluster1", "mysql_user", 3)
# FrameworkID should have been persisted.
self._state = self._state_provider.load_scheduler_state()
assert self._state.framework_info.id.value == self._framework_id.value
# Simulate restart.
scheduler2 = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
# Scheduler always receives registered() with the same FrameworkID after failover.
scheduler2.registered(self._driver, self._framework_id, object())
assert len(scheduler2._launchers) == 1
assert scheduler2._launchers["cluster1"].cluster_name == "cluster1"
# Scheduler has recovered the cluster so it doesn't accept another of the same name.
with pytest.raises(MysosScheduler.ClusterExists):
scheduler2.create_cluster("cluster1", "mysql_user", 3)
def test_scheduler_recovery_failure_before_launch(self):
scheduler1 = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
# Simulate restart before the task is successfully launched.
scheduler2 = MysosScheduler(self._state, self._state_provider,
self._framework_user, "./executor.pex",
"cmd.sh", self._zk_client, self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
assert len(scheduler2._launchers) == 0 # No launchers are recovered.
# Scheduler always receives registered() with the same FrameworkID after failover.
scheduler2.registered(self._driver, self._framework_id, object())
assert len(scheduler2._launchers) == 1
assert scheduler2._launchers["cluster1"].cluster_name == "cluster1"
# Now offer the resources for this task.
scheduler2.resourceOffers(self._driver, [self._offer])
# One task is launched for the offer.
assert len(
scheduler2._launchers["cluster1"]._cluster.active_tasks) == 1
# Scheduler has recovered the cluster so it doesn't accept another of the same name.
with pytest.raises(MysosScheduler.ClusterExists):
scheduler2.create_cluster("cluster1", "mysql_user", 3)
def test_scheduler_recovery(self):
scheduler1 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
scheduler1.resourceOffers(self._driver, [self._offer])
# One task is launched for one offer.
assert len(scheduler1._launchers["cluster1"]._cluster.tasks) == 1
with pytest.raises(MysosScheduler.ClusterExists):
scheduler1.create_cluster("cluster1", "mysql_user", 3)
# FrameworkID should have been persisted.
self._state = self._state_provider.load_scheduler_state()
assert self._state.framework_info.id.value == self._framework_id.value
# Simulate restart.
scheduler2 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
# Scheduler always receives registered() with the same FrameworkID after failover.
scheduler2.registered(self._driver, self._framework_id, object())
assert len(scheduler2._launchers) == 1
assert scheduler2._launchers["cluster1"].cluster_name == "cluster1"
# Scheduler has recovered the cluster so it doesn't accept another of the same name.
with pytest.raises(MysosScheduler.ClusterExists):
scheduler2.create_cluster("cluster1", "mysql_user", 3)
def test_scheduler_recovery_failure_before_launch(self):
scheduler1 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
scheduler1.registered(self._driver, self._framework_id, object())
scheduler1.create_cluster("cluster1", "mysql_user", 3)
# Simulate restart before the task is successfully launched.
scheduler2 = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml")
assert len(scheduler2._launchers) == 0 # No launchers are recovered.
# Scheduler always receives registered() with the same FrameworkID after failover.
scheduler2.registered(self._driver, self._framework_id, object())
assert len(scheduler2._launchers) == 1
assert scheduler2._launchers["cluster1"].cluster_name == "cluster1"
# Now offer the resources for this task.
scheduler2.resourceOffers(self._driver, [self._offer])
# One task is launched for the offer.
assert len(scheduler2._launchers["cluster1"]._cluster.active_tasks) == 1
# Scheduler has recovered the cluster so it doesn't accept another of the same name.
with pytest.raises(MysosScheduler.ClusterExists):
scheduler2.create_cluster("cluster1", "mysql_user", 3)
def test_scheduler_metrics(self):
scheduler_key = gen_encryption_key()
scheduler = MysosScheduler(
self._state,
self._state_provider,
self._framework_user,
"./executor.pex",
"cmd.sh",
self._zk_client,
self._zk_url,
Amount(5, Time.SECONDS),
"/etc/mysos/admin_keyfile.yml",
scheduler_key)
RootMetrics().register_observable('scheduler', scheduler)
scheduler.registered(self._driver, self._framework_id, object())
sample = RootMetrics().sample()
assert sample['scheduler.framework_registered'] == 1
scheduler.create_cluster(
"cluster1", "mysql_user", 3, cluster_password='******')
sample = RootMetrics().sample()
assert sample['scheduler.cluster_count'] == 1
assert sample['scheduler.total_requested_mem_mb'] == DEFAULT_TASK_MEM.as_(Data.MB) * 3
assert sample['scheduler.total_requested_disk_mb'] == DEFAULT_TASK_DISK.as_(Data.MB) * 3
assert sample['scheduler.total_requested_cpus'] == DEFAULT_TASK_CPUS * 3
scheduler.resourceOffers(self._driver, [self._offer])
sample = RootMetrics().sample()
assert sample['scheduler.resource_offers'] == 1
assert sample['scheduler.tasks_launched'] == 1
status = mesos_pb2.TaskStatus()
status.state = mesos_pb2.TASK_RUNNING
status.slave_id.value = self._offer.slave_id.value
status.task_id.value = 'mysos-cluster1-0'
scheduler.statusUpdate(self._driver, status)
status.state = mesos_pb2.TASK_FAILED
scheduler.statusUpdate(self._driver, status)
sample = RootMetrics().sample()
assert sample['scheduler.tasks_failed'] == 1
scheduler.delete_cluster("cluster1", 'test_password')
sample = RootMetrics().sample()
assert sample['scheduler.cluster_count'] == 0
assert sample['scheduler.total_requested_mem_mb'] == 0
assert sample['scheduler.total_requested_disk_mb'] == 0
assert sample['scheduler.total_requested_cpus'] == 0
