def test_one_worker(self, mock_Launcher, mock_from_confitems):
result = wsgi.start_workers('queue', 'items')
self.assertEqual(result, ['worker_pid'])
mock_from_confitems.assert_called_once_with('items')
mock_Launcher.assert_called_once_with('starter', 'queue')
mock_Launcher.return_value.start.assert_called_once_with()
def test_five_workers(self, mock_Launcher, mock_from_confitems):
result = wsgi.start_workers('queue', 'items', 5)
self.assertEqual(result, ['worker_pid'] * 5)
mock_from_confitems.assert_called_once_with('items')
mock_Launcher.assert_called_once_with('starter', 'queue')
mock_Launcher.return_value.start.assert_has_calls([
mock.call(),
mock.call(),
mock.call(),
mock.call(),
mock.call(),
])
def train(config, requests=None, workers=1, log_config=None):
"""
Run the Train benchmark tool.
:param config: The name of the configuration file to read.
:param requests: A list of one or more request files to read.
:param workers: The number of workers to use.
:param log_config: The name of a logging configuration file.
"""
# If we're using nova_limits, that relies on _ being declared,
# which is presumably done by nova-api. We need to dummy it out
# so that this works...
__builtin__._ = lambda x: x # Pragma: nocover
# Read in the configuration
conf = ConfigParser.SafeConfigParser()
conf.read([config])
# We must have a Turnstile section
if not conf.has_section('turnstile'):
raise Exception("No Turnstile configuration available")
# Which log configuration do we use?
if not log_config:
# Try to get it from the configuration
try:
log_config = conf.get('train', 'log_config')
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
pass
# Try to configure from a file, if one is specified
if log_config:
try:
# Try to read configuration from a file
logging.config.fileConfig(log_config)
except Exception as exc:
print >>sys.stderr, ("Warning: Failed to read logging "
"configuration from file %r: %s" %
(log_config, exc))
log_config = None
# OK, last-ditch logging configuration
if not log_config:
logging.basicConfig()
# Now that logging has been configured, we can import other train
# modules; this has to wait until now, because each starts off
# with a "LOG = logging.getLogger(__name__)", and that logger will
# not reflect the configuration that was set up above
from train import request
from train import wsgi
# Determine the number of workers to employ
if not workers:
# Try to get it from the configuration
try:
workers = int(conf.get('train', 'workers'))
except (ValueError, ConfigParser.NoSectionError,
ConfigParser.NoOptionError):
# Default to 1
workers = 1
# Add any requests files from configuration
if not requests:
requests = []
try:
requests += conf.get('train', 'requests').split()
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
pass
# Demand we have some requests files, too
if not requests:
raise Exception("No requests to feed through Turnstile")
# Now, we need the sequences
sequences = request.parse_files(requests)
# Set up the queue
queue = multiprocessing.Queue()
# Start the workers
servers = wsgi.start_workers(queue, conf.items('turnstile'), workers)
# And now we start feeding in the requests
procs = []
for seq in sequences:
proc = multiprocessing.Process(target=seq.queue_request, args=(queue,))
proc.start()
procs.append(proc)
# Wait for all the sequence feeders to shut down, which they'll do
# as soon as they've finished submitting all the requests
for proc in procs:
proc.join()
# Ask all the servers to exit, nicely
for server in servers:
queue.put('STOP')
# The sequence processes will not actually exit until all items
# fed by them into the queue have been pulled off. Thus, the
# queue should be empty...but let's be sure
while not queue.empty():
time.sleep(1)
# Now let's give the processes a little time to finish doing their
# thing...
time.sleep(1)
# OK, now make sure *all* the drivers exit
for server in servers:
try:
os.kill(server, signal.SIGTERM)
except OSError:
# That server's already stopped
pass
