diagnose.py

   1 #!/usr/bin/python
   2 #
   3 # Copyright (c) 2004  The Trustees of Princeton University (Trustees).
   4 #
   5 # Faiyaz Ahmed <faiyaza@cs.princeton.edu>
   6 # Stephen Soltesz <soltesz@cs.princeton.edu>
   7 #
   8 # $Id: diagnose.py,v 1.1 2007/08/08 13:36:46 soltesz Exp $
   9
  10 import sys
  11 from threading import *
  12 import time
  13 import logging
  14 import Queue
  15 from sets import Set
  16
  17 # Global config options
  18 import parser as parsermodule
  19 parser = parsermodule.getParser()
  20
  21 parser.set_defaults(nodelist=None,
  22                                         refresh=False,
  23                                         cachert=False,
  24                                         cachenodes=False,
  25                                         blacklist=None,
  26                                         ticketlist=None)
  27
  28 parser.add_option("", "--nodelist", dest="nodelist", metavar="filename",
  29                                         help="Read nodes to act on from specified file")
  30 parser.add_option("", "--refresh", action="store_true", dest="refresh",
  31                                         help="Refresh the cached values")
  32 parser.add_option("", "--cachert", action="store_true", dest="cachert",
  33                                         help="Cache the RT database query")
  34 parser.add_option("", "--cachenodes", action="store_true", dest="cachenodes",
  35                                         help="Cache node lookup from PLC")
  36 parser.add_option("", "--ticketlist", dest="ticketlist",
  37                                         help="Whitelist all RT tickets in this file")
  38 parser.add_option("", "--blacklist", dest="blacklist",
  39                                         help="Blacklist all nodes in this file")
  40
  41 config = parsermodule.parse_args(parser)
  42
  43 # daemonize and *pid
  44 #from util.process import *
  45
  46 # RT tickets
  47 import rt
  48 # Correlates input with policy to form actions
  49 import policy
  50 import moncommands
  51 import database
  52 import plc
  53 import syncplcdb
  54
  55 # Log to what
  56 LOG="./monitor.log"
  57
  58 # Time to refresh DB and remove unused entries
  59 RTSLEEP=7200 #2hrs
  60 # Time between policy enforce/update
  61 #POLSLEEP=43200 #12hrs
  62 POLSLEEP=10
  63
  64 # Global list of all running threads.  Any threads added to
  65 # list will be monitored.
  66 runningthreads = {}
  67 # Seconds between checking threads
  68 WATCHSLEEP = 5
  69
  70 # Set up Logging
  71 logger = logging.getLogger("monitor")
  72 logger.setLevel(logging.DEBUG)
  73 fh = logging.FileHandler(LOG, mode = 'a')
  74 fh.setLevel(logging.DEBUG)
  75 formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
  76 fh.setFormatter(formatter)
  77 logger.addHandler(fh)
  78
  79
  80 """
  81 Launches threads and adds them to the runningthreads global list.
  82 Assigns name for thread, starts.
  83 """
  84 def startThread(fnct, name):
  85                 runningthreads[name] = fnct
  86                 runningthreads[name].setName(name)
  87                 try:
  88                         logger.info("Starting thread " + name)
  89                         runningthreads[name].start()
  90                 except Exception, err:
  91                         logger.error("Thread: " + name + " " + error)
  92
  93
  94 """
  95 Watches threads and catches exceptions.  Each launched thread is
  96 watched and state is logged.
  97 """
  98 class ThreadWatcher(Thread):
  99         def __init__(self):
 100                 Thread.__init__(self)
 101
 102         def run(self):
 103                 while 1:
 104                         self.checkThreads()
 105                         time.sleep(WATCHSLEEP)
 106
 107         def checkThreads(self):
 108                 # Iterate through treads, compare with last running.
 109                 for thread in runningthreads.keys():
 110                         # If thread found dead, remove from queue
 111                         #print "found %s" % thread
 112                         if not runningthreads[thread].isAlive():
 113                                 logger.error("***********Thread died: %s**********" %(thread))
 114                                 del runningthreads[thread]
 115                 return len(runningthreads.keys())
 116
 117
 118 class Dummy(Thread):
 119         def __init__(self):
 120                 Thread.__init__(self)
 121
 122         def run(self):
 123                 time.sleep(5)
 124
 125 def dict_from_nodelist(nl):
 126         d = {}
 127         for host in nl:
 128                 h = host['hostname']
 129                 d[h] = host
 130         return d
 131
 132
 133
 134 """
 135 Start threads, do some housekeeping, then daemonize.
 136 """
 137 def main():
 138         # Defaults
 139         global status, logger
 140         global config
 141
 142         logger.info('Diagnose Started')
 143         print 'Diagnose Started'
 144
 145         ##########  VARIABLES   ########################################
 146         # Queue between Merge and RT
 147         toRT = Queue.Queue()
 148
 149         # Queue between RT and Diagnose
 150         fromRT = Queue.Queue()
 151
 152         #########  GET NODES    ########################################
 153         logger.info('Get Nodes from PLC')
 154         print "getnode from plc: %s %s %s" % (config.debug, config.cachenodes, config.refresh)
 155         l_plcnodes = database.if_cached_else_refresh(config.cachenodes,
 156                                                                 config.refresh, "l_plcnodes",
 157                                                                 lambda : syncplcdb.create_plcdb() )
 158
 159         s_plcnodenames = Set([x['hostname'] for x in l_plcnodes])
 160
 161         # List of nodes from a user-provided file.
 162         if config.nodelist:
 163                 file = config.nodelist
 164                 nodelist = config.getListFromFile(file)
 165
 166                 s_usernodes = Set(nodelist)
 167                 # SAFE nodes are in PLC and the list
 168                 s_safe_usernodes   = s_plcnodenames & s_usernodes
 169                 # UNSAFE nodes are list but not in PLC. i.e. do not monitor.
 170                 s_unsafe_usernodes = s_usernodes - s_plcnodenames
 171                 if len(s_unsafe_usernodes) > 0 :
 172                         for node in s_unsafe_usernodes:
 173                                 print "WARNING: User provided: %s but not found in PLC" % node
 174
 175                 l_nodes = filter(lambda x: x['hostname'] in s_safe_usernodes,l_plcnodes)
 176         else:
 177                 l_nodes = l_plcnodes
 178
 179         print "len of l_nodes: %d" % len(l_nodes)
 180         # Minus blacklisted ones..
 181         l_blacklist = database.if_cached_else(1, "l_blacklist", lambda : [])
 182         l_ticket_blacklist = database.if_cached_else(1,"l_ticket_blacklist",lambda : [])
 183         l_nodes  = filter(lambda x : not x['hostname'] in l_blacklist, l_nodes)
 184
 185         logger.info('Get Tickets from RT')
 186         #######  RT tickets    #########################################
 187         t = moncommands.MyTimer()
 188         ad_dbTickets = database.if_cached_else_refresh(config.cachert, config.refresh, "ad_dbTickets", rt.rt_tickets)
 189         if ad_dbTickets == "":
 190                 print "ad_dbTickets failed..."
 191                 sys.exit(1)
 192         print "Getting tickets from RT took: %f sec" % t.diff() ; del t
 193
 194         logger.info('Start Merge/RT/Diagnose threads')
 195         ####### Merge
 196         # only look at nodes in l_nodes
 197         merge = policy.Merge( [node['hostname'] for node in l_nodes], toRT)
 198         startThread(merge,"merge")
 199         ####### RT
 200         rt1   = rt.RT(ad_dbTickets, toRT, fromRT, l_ticket_blacklist)
 201         startThread(rt1,"rt1")
 202         ####### Diagnose
 203         diagnose = policy.Diagnose(fromRT)
 204         startThread(diagnose,"diagnose")
 205
 206
 207         tw = ThreadWatcher()
 208         while True:
 209                 if tw.checkThreads() == 0:
 210                         break
 211                 print "waiting... %s" % time.time()
 212                 time.sleep(WATCHSLEEP)
 213
 214         logger.info('Diagnose Exitting')
 215         sys.exit(0)
 216
 217 if __name__ == '__main__':
 218         try:
 219                 main()
 220         except KeyboardInterrupt:
 221                 print "Killed.  Exitting."
 222                 logger.info('Diagnose Killed')
 223                 sys.exit(0)