class KeystoneProbe(wsgi.Middleware):
def __init__(self, app, conf):
self.app = app
self.config = conf
self.log = logging.getLogger(__name__)
self.statsd = Statsd(conf)
def __call__(self, environ, start_response):
return self.process_request(environ, start_response)
def str2bool(self, str):
if not str:
return False
if str in ['false', 'False', 'no', '0']:
return False
return True
def get_username(self, environ):
'''Extracts auth details from requests and returns a tuple (username, password) if found,
otherwise returns None'''
try:
auth = environ['openstack.params']['auth']['passwordCredentials']
username = auth['username']
except KeyError:
self.log.debug('No authentication context in request')
return None
return username
def statsd_event(self, environ):
username = self.get_username(environ)
status_int = environ['statsd.status']
if username:
# Authentication request
username = username.replace('.', '_')
self.statsd.increment('auth.{0}.{1}'.format(username, status_int))
path = environ['PATH_INFO']
method = environ['REQUEST_METHOD']
# Comment this out for now, generates a lot of excess metrics
#self.statsd.increment('req.{0}.{1}.{2}'.format(path, method, status_int))
def process_request(self, environ, start_response):
def _start_response(status, headers, exc_info=None):
"""start_response wrapper to grab headers and status code"""
# Convert all headers to lower case
new_h = [(k.lower(), v) for k,v in headers]
environ['statsd.headers'] = new_h
environ['statsd.status'] = int(status.split(' ', 1)[0])
start_response(status, headers, exc_info)
# Register a post-hook to be called after the request completes
if not 'eventlet.posthooks' in environ:
environ['eventlet.posthooks'] = []
req = Request(environ)
environ['eventlet.posthooks'].append((self.statsd_event, (), {}))
return self.app(environ, _start_response)
import string
import sys
from kafka import KafkaConsumer as Consumer, TopicPartition as Partition
from statsd import StatsClient as Statsd
if __name__ == '__main__':
state = json.loads(''.join(sys.stdin))
try:
js = json.loads(os.environ['KONTROL_ANNOTATIONS'])
broker = random.choice(js['kafka.unity3d.com/brokers'].split(','))
topic = js['kafka.unity3d.com/topic']
statsd = Statsd('127.0.0.1', 8125)
consumer = Consumer(bootstrap_servers=broker)
partition = Partition(topic, 0)
consumer.assign([partition])
if not state['last']:
#
# - the produce/consume loop has just started
# - reset to the head
#
consumer.seek_to_end()
else:
#
def __init__(self, app, conf):
self.app = app
self.config = conf
self.log = logging.getLogger(__name__)
self.statsd = Statsd(conf)
def __init__(self, app, conf, *args, **kwargs):
self.statsd = Statsd(conf)
self.logger = get_logger(conf, log_route='probe')
self.app = app
self.pp = PrettyPrinter(indent=4)
class ProbeMiddleware(object):
"""
Probe middleware used for monitoring and statistics gathering.
It will sit in the request pipeline doing nothing, but offers a place to
send metrics to a system.
"""
def __init__(self, app, conf, *args, **kwargs):
self.statsd = Statsd(conf)
self.logger = get_logger(conf, log_route='probe')
self.app = app
self.pp = PrettyPrinter(indent=4)
def GET(self, req):
"""Returns a 200 response with "OK" in the body."""
return Response(request=req, body="OK", content_type="text/plain")
def statsd_event(self, env, req):
try:
request_time = time() - env['swprobe.start_time']
headers = dict(env['swprobe.headers'])
response = getattr(req, 'response', None)
if getattr(req, 'client_disconnect', False) or \
getattr(response, 'client_disconnect', False):
status_int = 499
else:
status_int = env['swprobe.status']
duration = (time() - env['swprobe.start_time']) * 1000
# Find out how much bytes were transferred. For PUTs we can get this from the request object,
# but for GETs we look at the Content-Length header of the response
# Don't know how to find out # bytes transferred for aborted transfers
transferred = getattr(req, 'bytes_transferred', 0)
if transferred == 0 and 'CONTENT_LENGTH' in env.keys():
transferred = env['CONTENT_LENGTH']
transferred = 0 if transferred == '-' else int(transferred)
if transferred == 0 and status_int != 499 and req.method == "GET":
transferred = headers['content-length']
if req.path.startswith("/auth"):
# Time how long auth request takes
self.statsd.increment("req.auth")
self.statsd.timing("auth", duration)
return None
# Find out for which account the request was made
try:
if 'keystone.identity' in env.keys():
# If authenticated by keystone
swift_account = env['keystone.identity']['tenant'][1]
else:
# If authenticated by swauth or externally
swift_account = env["REMOTE_USER"].split(",")[1]
except:
swift_account = "anonymous"
self.statsd.increment("req.%s.%s.%s" %(swift_account, req.method, status_int))
if status_int >= 200 and status_int < 400:
# Log timers for succesful requests
self.statsd.timing("%s" %(req.method), duration)
# Upload and download size statistics
if req.method == "PUT":
self.statsd.update_stats("xfer.%s.bytes_uploaded" % swift_account, transferred)
elif req.method == "GET":
self.statsd.update_stats("xfer.%s.bytes_downloaded" % swift_account, transferred)
except Exception as e:
try:
self.logger.exception(_("Encountered error in statsd_event"))
self.logger.exception(e)
except Exception:
pass
def __call__(self, env, start_response):
"""WSGI callable"""
def _start_response(status, headers, exc_info=None):
"""start_response wrapper to grab headers and status code"""
# Convert all headers to lower case
new_h = [(k.lower(), v) for k,v in headers]
env['swprobe.headers'] = new_h
env['swprobe.status'] = int(status.split(' ', 1)[0])
start_response(status, headers, exc_info)
req = Request(env)
env['swprobe.start_time'] = time()
if not 'eventlet.posthooks' in env:
env['eventlet.posthooks'] = []
env['eventlet.posthooks'].append((self.statsd_event, (req,), {}))
return self.app(env, _start_response)
