Re-land "Make Buildbot masters send ts_mon metrics, and add standard HTTP server metrics.

scripts/master/master_utils.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import ctypes
 import ctypes.util
 import os
 import random
 import re
 import sys
@@ skipping 10 matching lines @@
 
 from master.autoreboot_buildslave import AutoRebootBuildSlave
 from buildbot.status.web.authz import Authz
 from buildbot.status.web.baseweb import WebStatus
 
 import master.chromium_status_bb8 as chromium_status
 
 from common import chromium_utils
 from master import buildbucket
 from master import cbe_json_status_push
+from master import monitoring_status_receiver
 from master import pubsub_json_status_push
 from master import status_logger
 import config
 
 
 # CQ uses this service account to authenticate to other services, including
 # buildbucket.
 CQ_SERVICE_ACCOUNT = (
   '5071639625-1lppvbtck1morgivc6sq4dul7klu27sd@developer.gserviceaccount.com')
 
@@ skipping 380 matching lines @@
         active_master.master_port_alt,
         tagComparator=tagComparator,
         customEndpoints=customEndpoints,
         num_events_max=3000,
         templates=templates,
         console_repo_filter=console_repo_filter,
         console_builder_filter=console_builder_filter,
         web_template_globals=web_template_globals,
         **kwargs))
 
-  # Add a status logger.
+  # Add a status logger and a ts_mon flushing receiver.
   c['status'].append(status_logger.StatusEventLogger())
+  c['status'].append(monitoring_status_receiver.MonitoringStatusReceiver())
 
   # Keep last build logs, the default is too low.
   c['buildHorizon'] = 1000
   c['logHorizon'] = 500
   # Must be at least 2x the number of slaves.
   c['eventHorizon'] = 200
   # Tune cache sizes to speed up web UI.
   c['caches'] = {
     'BuildRequests': 1000,
     'Changes': 1000,
@@ skipping 246 matching lines @@
   # Pad the cmdline string to the required length.  If it's longer than the
   # currentl commandline, truncate it.
   if len(cmdline) >= cmdlen:
     new_cmdline = ctypes.c_char_p(cmdline[:cmdlen-1] + '\0')
   else:
     new_cmdline = ctypes.c_char_p(cmdline.ljust(cmdlen, '\0'))
 
   # Replace the old commandline.
   libc = ctypes.CDLL(ctypes.util.find_library('c'))
   libc.memcpy(argv.contents, new_cmdline, cmdlen)