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"""
Testing hook for verifying correctness of initial sync.
"""
from __future__ import absolute_import
import os.path
import random
import bson
import pymongo.errors
from . import cleanup
from . import interface
from . import jsfile
from ..fixtures import replicaset
from ... import errors
class BackgroundInitialSync(interface.Hook):
"""
After every test, this hook checks if a background node has finished initial sync and if so,
validates it, tears it down, and restarts it.
This test accepts a parameter 'n' that specifies a number of tests after which it will wait for
replication to finish before validating and restarting the initial sync node.
This requires the ReplicaSetFixture to be started with 'start_initial_sync_node=True'. If used
at the same time as CleanEveryN, the 'n' value passed to this hook should be equal to the 'n'
value for CleanEveryN.
"""
DEFAULT_N = cleanup.CleanEveryN.DEFAULT_N
def __init__(self, hook_logger, fixture, n=DEFAULT_N, shell_options=None):
if not isinstance(fixture, replicaset.ReplicaSetFixture):
raise ValueError("`fixture` must be an instance of ReplicaSetFixture, not {}".format(
fixture.__class__.__name__))
description = "Background Initial Sync"
interface.Hook.__init__(self, hook_logger, fixture, description)
self.n = n
self.tests_run = 0
self.random_restarts = 0
self._shell_options = shell_options
def after_test(self, test, test_report):
self.tests_run += 1
hook_test_case = BackgroundInitialSyncTestCase.create_after_test(
self.logger.test_case_logger, test, self, self._shell_options)
hook_test_case.configure(self.fixture)
hook_test_case.run_dynamic_test(test_report)
class BackgroundInitialSyncTestCase(jsfile.DynamicJSTestCase):
JS_FILENAME = os.path.join("jstests", "hooks", "run_initial_sync_node_validation.js")
def __init__(self, logger, test_name, description, base_test_name, hook, shell_options=None):
jsfile.DynamicJSTestCase.__init__(self, logger, test_name, description, base_test_name,
hook, self.JS_FILENAME, shell_options)
def run_test(self):
sync_node = self.fixture.get_initial_sync_node()
sync_node_conn = sync_node.mongo_client()
# If it's been 'n' tests so far, wait for the initial sync node to finish syncing.
if self._hook.tests_run >= self._hook.n:
self.logger.info("%d tests have been run against the fixture, waiting for initial sync"
" node to go into SECONDARY state", self._hook.tests_run)
self._hook.tests_run = 0
cmd = bson.SON([("replSetTest", 1), ("waitForMemberState", 2), ("timeoutMillis",
20 * 60 * 1000)])
sync_node_conn.admin.command(cmd)
# Check if the initial sync node is in SECONDARY state. If it's been 'n' tests, then it
# should have waited to be in SECONDARY state and the test should be marked as a failure.
# Otherwise, we just skip the hook and will check again after the next test.
try:
state = sync_node_conn.admin.command("replSetGetStatus").get("myState")
if state != 2:
if self._hook.tests_run == 0:
msg = "Initial sync node did not catch up after waiting 20 minutes"
self.logger.exception("{0} failed: {1}".format(self._hook.description, msg))
raise errors.TestFailure(msg)
self.logger.info("Initial sync node is in state %d, not state SECONDARY (2)."
" Skipping BackgroundInitialSync hook for %s", state,
self._base_test_name)
# If we have not restarted initial sync since the last time we ran the data
# validation, restart initial sync with a 20% probability.
if self._hook.random_restarts < 1 and random.random() < 0.2:
self.logger.info(
"randomly restarting initial sync in the middle of initial sync")
self.__restart_init_sync(sync_node, sync_node_conn)
self._hook.random_restarts += 1
return
except pymongo.errors.OperationFailure:
# replSetGetStatus can fail if the node is in STARTUP state. The node will soon go into
# STARTUP2 state and replSetGetStatus will succeed after the next test.
self.logger.info(
"replSetGetStatus call failed in BackgroundInitialSync hook, skipping hook for %s",
self._base_test_name)
return
self._hook.random_restarts = 0
# Run data validation and dbhash checking.
self._js_test.run_test()
self.__restart_init_sync(sync_node, sync_node_conn)
# Restarts initial sync by shutting down the node, clearing its data, and restarting it.
def __restart_init_sync(self, sync_node, sync_node_conn):
# Tear down and restart the initial sync node to start initial sync again.
sync_node.teardown()
self.logger.info("Starting the initial sync node back up again...")
sync_node.setup()
sync_node.await_ready()
class IntermediateInitialSync(interface.Hook):
"""
This hook accepts a parameter 'n' that specifies a number of tests after which it will start up
a node to initial sync, wait for replication to finish, and then validate the data.
This requires the ReplicaSetFixture to be started with 'start_initial_sync_node=True'.
"""
DEFAULT_N = cleanup.CleanEveryN.DEFAULT_N
def __init__(self, hook_logger, fixture, n=DEFAULT_N):
if not isinstance(fixture, replicaset.ReplicaSetFixture):
raise ValueError("`fixture` must be an instance of ReplicaSetFixture, not {}".format(
fixture.__class__.__name__))
description = "Intermediate Initial Sync"
interface.Hook.__init__(self, hook_logger, fixture, description)
self.n = n
self.tests_run = 0
def _should_run_after_test(self):
self.tests_run += 1
# If we have not run 'n' tests yet, skip this hook.
if self.tests_run < self.n:
return False
self.tests_run = 0
return True
def after_test(self, test, test_report):
if not self._should_run_after_test():
return
hook_test_case = IntermediateInitialSyncTestCase.create_after_test(
self.logger.test_case_logger, test, self)
hook_test_case.configure(self.fixture)
hook_test_case.run_dynamic_test(test_report)
class IntermediateInitialSyncTestCase(jsfile.DynamicJSTestCase):
JS_FILENAME = os.path.join("jstests", "hooks", "run_initial_sync_node_validation.js")
def __init__(self, logger, test_name, description, base_test_name, hook):
jsfile.DynamicJSTestCase.__init__(self, logger, test_name, description, base_test_name,
hook, self.JS_FILENAME)
def run_test(self):
sync_node = self.fixture.get_initial_sync_node()
sync_node_conn = sync_node.mongo_client()
sync_node.teardown()
self.logger.info("Starting the initial sync node back up again...")
sync_node.setup()
sync_node.await_ready()
# Do initial sync round.
self.logger.info("Waiting for initial sync node to go into SECONDARY state")
cmd = bson.SON([("replSetTest", 1), ("waitForMemberState", 2), ("timeoutMillis",
20 * 60 * 1000)])
sync_node_conn.admin.command(cmd)
# Run data validation and dbhash checking.
self._js_test.run_test()
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