160 lines
6.0 KiB
Python
160 lines
6.0 KiB
Python
"""
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Standalone mongod fixture for executing JSTests against.
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"""
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from __future__ import absolute_import
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import os
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import os.path
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import shutil
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import time
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import pymongo
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import pymongo.errors
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from . import interface
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from ... import config
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from ... import core
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from ... import errors
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from ... import utils
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class MongoDFixture(interface.Fixture):
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"""
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Fixture which provides JSTests with a standalone mongod to run
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against.
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"""
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AWAIT_READY_TIMEOUT_SECS = 300
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def __init__(self,
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logger,
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job_num,
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mongod_executable=None,
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mongod_options=None,
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dbpath_prefix=None,
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preserve_dbpath=False):
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interface.Fixture.__init__(self, logger, job_num)
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if "dbpath" in mongod_options and dbpath_prefix is not None:
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raise ValueError("Cannot specify both mongod_options.dbpath and dbpath_prefix")
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# Command line options override the YAML configuration.
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self.mongod_executable = utils.default_if_none(config.MONGOD_EXECUTABLE, mongod_executable)
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self.mongod_options = utils.default_if_none(mongod_options, {}).copy()
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self.preserve_dbpath = preserve_dbpath
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# The dbpath in mongod_options takes precedence over other settings to make it easier for
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# users to specify a dbpath containing data to test against.
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if "dbpath" not in self.mongod_options:
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# Command line options override the YAML configuration.
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dbpath_prefix = utils.default_if_none(config.DBPATH_PREFIX, dbpath_prefix)
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dbpath_prefix = utils.default_if_none(dbpath_prefix, config.DEFAULT_DBPATH_PREFIX)
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self.mongod_options["dbpath"] = os.path.join(dbpath_prefix,
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"job{}".format(self.job_num),
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config.FIXTURE_SUBDIR)
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self._dbpath = self.mongod_options["dbpath"]
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self.mongod = None
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self.port = None
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def setup(self):
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if not self.preserve_dbpath:
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shutil.rmtree(self._dbpath, ignore_errors=True)
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try:
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os.makedirs(self._dbpath)
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except os.error:
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# Directory already exists.
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pass
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if "port" not in self.mongod_options:
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self.mongod_options["port"] = core.network.PortAllocator.next_fixture_port(self.job_num)
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self.port = self.mongod_options["port"]
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mongod = core.programs.mongod_program(self.logger,
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executable=self.mongod_executable,
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**self.mongod_options)
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try:
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self.logger.info("Starting mongod on port %d...\n%s", self.port, mongod.as_command())
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mongod.start()
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self.logger.info("mongod started on port %d with pid %d.", self.port, mongod.pid)
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except:
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self.logger.exception("Failed to start mongod on port %d.", self.port)
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raise
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self.mongod = mongod
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def await_ready(self):
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deadline = time.time() + MongoDFixture.AWAIT_READY_TIMEOUT_SECS
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# Wait until the mongod is accepting connections. The retry logic is necessary to support
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# versions of PyMongo <3.0 that immediately raise a ConnectionFailure if a connection cannot
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# be established.
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while True:
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# Check whether the mongod exited for some reason.
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exit_code = self.mongod.poll()
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if exit_code is not None:
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raise errors.ServerFailure("Could not connect to mongod on port {}, process ended"
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" unexpectedly with code {}.".format(
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self.port, exit_code))
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try:
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# Use a shorter connection timeout to more closely satisfy the requested deadline.
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client = self.mongo_client(timeout_millis=500)
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client.admin.command("ping")
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break
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except pymongo.errors.ConnectionFailure:
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remaining = deadline - time.time()
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if remaining <= 0.0:
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raise errors.ServerFailure(
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"Failed to connect to mongod on port {} after {} seconds".format(
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self.port, MongoDFixture.AWAIT_READY_TIMEOUT_SECS))
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self.logger.info("Waiting to connect to mongod on port %d.", self.port)
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time.sleep(0.1) # Wait a little bit before trying again.
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self.logger.info("Successfully contacted the mongod on port %d.", self.port)
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def _do_teardown(self):
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running_at_start = self.is_running()
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success = True # Still a success even if nothing is running.
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if not running_at_start and self.mongod is not None:
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self.logger.info(
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"mongod on port %d was expected to be running in _do_teardown(), but wasn't. "
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"Exited with code %d.",
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self.port, self.mongod.poll())
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if self.mongod is not None:
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if running_at_start:
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self.logger.info("Stopping mongod on port %d with pid %d...",
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self.port,
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self.mongod.pid)
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self.mongod.stop()
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exit_code = self.mongod.wait()
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success = exit_code == 0
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if running_at_start:
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self.logger.info("Successfully terminated the mongod on port %d, exited with code"
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" %d.",
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self.port,
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exit_code)
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return success
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def is_running(self):
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return self.mongod is not None and self.mongod.poll() is None
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def get_internal_connection_string(self):
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if self.mongod is None:
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raise ValueError("Must call setup() before calling get_internal_connection_string()")
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return "localhost:%d" % self.port
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def get_driver_connection_url(self):
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return "mongodb://" + self.get_internal_connection_string()
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