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"""
Master/slave fixture for executing JSTests against.
"""
from __future__ import absolute_import
import os.path
import socket
import pymongo
from . import interface
from . import standalone
from ... import config
from ... import logging
from ... import utils
class MasterSlaveFixture(interface.ReplFixture):
"""
Fixture which provides JSTests with a master/slave deployment to
run against.
"""
def __init__(self,
logger,
job_num,
mongod_executable=None,
mongod_options=None,
master_options=None,
slave_options=None,
dbpath_prefix=None,
preserve_dbpath=False):
interface.ReplFixture.__init__(self, logger, job_num)
if "dbpath" in mongod_options:
raise ValueError("Cannot specify mongod_options.dbpath")
self.mongod_executable = mongod_executable
self.mongod_options = utils.default_if_none(mongod_options, {})
self.master_options = utils.default_if_none(master_options, {})
self.slave_options = utils.default_if_none(slave_options, {})
self.preserve_dbpath = preserve_dbpath
# Command line options override the YAML configuration.
dbpath_prefix = utils.default_if_none(config.DBPATH_PREFIX, dbpath_prefix)
dbpath_prefix = utils.default_if_none(dbpath_prefix, config.DEFAULT_DBPATH_PREFIX)
self._dbpath_prefix = os.path.join(dbpath_prefix,
"job%d" % (self.job_num),
config.FIXTURE_SUBDIR)
self.master = None
self.slave = None
def setup(self):
if self.master is None:
self.master = self._new_mongod_master()
self.master.setup()
self.port = self.master.port
if self.slave is None:
self.slave = self._new_mongod_slave()
self.slave.setup()
def await_ready(self):
self.master.await_ready()
self.slave.await_ready()
# Do a replicated write to ensure that the slave has finished with its initial sync before
# starting to run any tests.
client = utils.new_mongo_client(self.port)
# Keep retrying this until it times out waiting for replication.
def insert_fn(remaining_secs):
remaining_millis = int(round(remaining_secs * 1000))
write_concern = pymongo.WriteConcern(w=2, wtimeout=remaining_millis)
coll = client.resmoke.get_collection("await_ready", write_concern=write_concern)
coll.insert_one({"awaiting": "ready"})
try:
self.retry_until_wtimeout(insert_fn)
except pymongo.errors.WTimeoutError:
self.logger.info("Replication of write operation timed out.")
raise
def _do_teardown(self):
running_at_start = self.is_running()
success = True # Still a success if nothing is running.
if not running_at_start:
self.logger.info(
"Master-slave deployment was expected to be running in _do_teardown(), but wasn't.")
if self.slave is not None:
if running_at_start:
self.logger.info("Stopping slave...")
success = self.slave.teardown()
if running_at_start:
self.logger.info("Successfully stopped slave.")
if self.master is not None:
if running_at_start:
self.logger.info("Stopping master...")
success = self.master.teardown() and success
if running_at_start:
self.logger.info("Successfully stopped master.")
return success
def is_running(self):
return (self.master is not None and self.master.is_running() and
self.slave is not None and self.slave.is_running())
def get_primary(self):
return self.master
def get_secondaries(self):
return [self.slave]
def _new_mongod(self, mongod_logger, mongod_options):
"""
Returns a standalone.MongoDFixture with the specified logger and
options.
"""
return standalone.MongoDFixture(mongod_logger,
self.job_num,
mongod_executable=self.mongod_executable,
mongod_options=mongod_options,
preserve_dbpath=self.preserve_dbpath)
def _new_mongod_master(self):
"""
Returns a standalone.MongoDFixture configured to be used as the
master of a master-slave deployment.
"""
mongod_logger = self.logger.new_fixture_node_logger("master")
mongod_options = self.mongod_options.copy()
mongod_options.update(self.master_options)
mongod_options["master"] = ""
mongod_options["dbpath"] = os.path.join(self._dbpath_prefix, "master")
return self._new_mongod(mongod_logger, mongod_options)
def _new_mongod_slave(self):
"""
Returns a standalone.MongoDFixture configured to be used as the
slave of a master-slave deployment.
"""
mongod_logger = self.logger.new_fixture_node_logger("slave")
mongod_options = self.mongod_options.copy()
mongod_options.update(self.slave_options)
mongod_options["slave"] = ""
mongod_options["source"] = "%s:%d" % (socket.gethostname(), self.port)
mongod_options["dbpath"] = os.path.join(self._dbpath_prefix, "slave")
return self._new_mongod(mongod_logger, mongod_options)
def get_internal_connection_string(self):
return self.master.get_internal_connection_string()
def get_driver_connection_url(self):
return self.master.get_driver_connection_url()
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