changes for 3.0
[monitor.git] / policy.py
index f6629fb..7823237 100644 (file)
--- a/policy.py
+++ b/policy.py
@@ -3,7 +3,7 @@
 #
 # Faiyaz Ahmed <faiyaza@cs.princeton.edu>
 #
-# $Id: policy.py,v 1.7 2007/01/11 21:39:07 faiyaza Exp $
+# $Id: policy.py,v 1.17 2007/08/29 17:26:50 soltesz Exp $
 #
 # Policy Engine.
 
@@ -16,7 +16,12 @@ import emailTxt
 import pickle
 import Queue
 import plc
+import sys
+import os
 import reboot
+import database
+import string
+from unified_model import cmpCategoryVal
 import config
 
 DAT="./monitor.dat"
@@ -27,22 +32,31 @@ logger = logging.getLogger("monitor")
 POLSLEEP = 7200
 
 # Where to email the summary
-SUMTO = "faiyaza@cs.princeton.edu"
+SUMTO = "soltesz@cs.princeton.edu"
 TECHEMAIL="tech-%s@sites.planet-lab.org"
 PIEMAIL="pi-%s@sites.planet-lab.org"
 SLICEMAIL="%s@slices.planet-lab.org"
 PLCEMAIL="support@planet-lab.org"
 
 #Thresholds (DAYS)
+SPERMIN = 60
+SPERHOUR = 60*60
 SPERDAY = 86400
-PITHRESH = 2 * SPERDAY
-SLICETHRESH = 5 * SPERDAY
+PITHRESH = 7 * SPERDAY
+SLICETHRESH = 7 * SPERDAY
 # Days before attempting rins again
 RINSTHRESH = 5 * SPERDAY
 
+# Days before calling the node dead.
+DEADTHRESH = 30 * SPERDAY
 # Minimum number of nodes up before squeezing
 MINUP = 2
 
+TECH=1
+PI=2
+USER=4
+ADMIN=8
+
 # IF:
 #  no SSH, down.
 #  bad disk, down
@@ -54,242 +68,1312 @@ MINUP = 2
 #  Email
 #  suspend slice creation
 #  kill slices
-class Policy(Thread):
-       def __init__(self, comonthread, sickNoTicket, emailed):
-               self.cmn = comonthread
-               # host - > (time of email, type of email)
-               self.emailed = emailed 
-               # all sick nodes w/o tickets
-               self.sickNoTicket = sickNoTicket
-               # Sitess we've Squeezed.
-               self.squeezed = {}
+def array_to_priority_map(array):
+       """ Create a mapping where each entry of array is given a priority equal
+       to its position in the array.  This is useful for subsequent use in the
+       cmpMap() function."""
+       map = {}
+       count = 0
+       for i in array:
+               map[i] = count
+               count += 1
+       return map
+
+def getdebug():
+       return config.debug
+
+def print_stats(key, stats):
+       if key in stats: print "%20s : %d" % (key, stats[key])
+
+
+class Merge(Thread):
+       def __init__(self, l_merge, toRT):
+               self.toRT = toRT
+               self.merge_list = l_merge
+               # the hostname to loginbase mapping
+               self.plcdb_hn2lb = database.dbLoad("plcdb_hn2lb")
+
+               # Previous actions taken on nodes.
+               self.act_all = database.if_cached_else(1, "act_all", lambda : {})
+               self.findbad = database.if_cached_else(1, "findbad", lambda : {})
+
+               self.cache_all = database.if_cached_else(1, "act_all", lambda : {})
+               self.sickdb = {}
+               self.mergedb = {}
                Thread.__init__(self)
-       
-
-       '''
-       What to do when node is in dbg (as reported by CoMon).
-       '''
-       def __actOnDebug(self, node):
-               # Check to see if we've done this before
-               if (node in self.emailed.keys()):
-                       if (self.emailed[node][0] == "dbg"):
-                               delta = time.time() - self.emailed[node][1]
-                               if (delta <= RINSTHRESH ):
-                                       # Don't mess with node if under Thresh. 
-                                       # Return, move on.
-                                       logger.info("POLICY:  %s in dbg, but acted on %s days ago" % (node, delta // SPERDAY))
-                                       return
-                       logger.info("POLICY:  Node in dbg - " + node)
-                       plc.nodeBootState(node, "rins") 
-                       # If it has a PCU
-                       return reboot.reboot(node)
-       
-       '''
-       What to do when node is in dbg (as reported by CoMon).
-       '''
-       def __actOnFilerw(self, node):
-               target = [PLCEMAIL]     
-               logger.info("POLICY:  Emailing PLC for " + node)
-               tmp = emailTxt.mailtxt.filerw
-               sbj = tmp[0] % {'hostname': node}
-               msg = tmp[1] % {'hostname': node}
-               mailer.email(sbj, msg, target)  
-               self.emailed[node] = ("filerw", time.time())
-
-
-       '''
-       Acts on sick nodes.
-       '''
-       def actOnSick(self):
-               # Get list of nodes in debug from PLC
-               #dbgNodes = NodesDebug()
-               global TECHEMAIL, PIEMAIL
-               # Grab a node from the queue (pushed by rt thread).
-               node = self.sickNoTicket.get(block = True)
-               # Get the login base    
-               loginbase = plc.siteId(node)
+
+       def run(self):
+               # populate sickdb
+               self.accumSickSites()
+               # read data from findbad and act_all
+               self.mergeActionsAndBadDB()
+               # pass node_records to RT
+               self.sendToRT()
+
+       def accumSickSites(self):
+               """
+               Take all nodes, from l_diagnose, look them up in the act_all database, 
+               and insert them into sickdb[] as:
+
+                       sickdb[loginbase][nodename] = fb_record
+               """
+               # look at all problems reported by findbad
+               l_nodes = self.findbad['nodes'].keys()
+               count = 0
+               for nodename in l_nodes:
+                       if nodename not in self.merge_list:
+                               continue                # skip this node, since it's not wanted
+
+                       count += 1
+                       loginbase = self.plcdb_hn2lb[nodename]
+                       values = self.findbad['nodes'][nodename]['values']
+
+                       fb_record = {}
+                       fb_record['nodename'] = nodename
+                       try:
+                               fb_record['category'] = values['category']
+                       except:
+                               print values
+                               print nodename
+                               print self.findbad['nodes'][nodename]
+                               count -= 1
+                               continue
+                       fb_record['state'] = values['state']
+                       fb_record['comonstats'] = values['comonstats']
+                       fb_record['plcnode'] = values['plcnode']
+                       fb_record['kernel'] = self.getKernel(values['kernel'])
+                       fb_record['stage'] = "findbad"
+                       fb_record['message'] = None
+                       fb_record['bootcd'] = values['bootcd']
+                       fb_record['args'] = None
+                       fb_record['info'] = None
+                       fb_record['time'] = time.time()
+                       fb_record['date_created'] = time.time()
+
+                       if loginbase not in self.sickdb:
+                               self.sickdb[loginbase] = {}
+
+                       self.sickdb[loginbase][nodename] = fb_record
+
+               print "Found %d nodes" % count
+
+       def getKernel(self, unamestr):
+               s = unamestr.split()
+               if len(s) > 2:
+                       return s[2]
+               else:
+                       return ""
+
+       def mergeActionsAndBadDB(self): 
+               """
+               - Look at the sick node_records as reported in findbad, 
+               - Then look at the node_records in act_all.  
+
+               There are four cases:
+               1) Problem in findbad, no problem in act_all
+                       this ok, b/c it just means it's a new problem
+               2) Problem in findbad, problem in act_all
+                       -Did the problem get better or worse?  
+                               -If Same, or Worse, then continue looking for open tickets.
+                               -If Better, or No problem, then "back-off" penalties.
+                                       This judgement may need to wait until 'Diagnose()'
+
+               3) No problem in findbad, problem in act_all
+                       The the node is operational again according to Findbad()
+
+               4) No problem in findbad, no problem in act_all
+                       There won't be a record in either db, so there's no code.
+               """
+
+               sorted_sites = self.sickdb.keys()
+               sorted_sites.sort()
+               # look at all problems reported by findbad
+               for loginbase in sorted_sites:
+                       d_fb_nodes = self.sickdb[loginbase]
+                       sorted_nodes = d_fb_nodes.keys()
+                       sorted_nodes.sort()
+                       for nodename in sorted_nodes:
+                               fb_record = self.sickdb[loginbase][nodename]
+                               x = fb_record
+                               if loginbase not in self.mergedb:
+                                       self.mergedb[loginbase] = {}
+
+                               # take the info either from act_all or fb-record.
+                               # if node not in act_all
+                               #       then take it from fbrecord, obviously.
+                               # else node in act_all
+                               #   if act_all == 0 length (no previous records)
+                               #               then take it from fbrecord.
+                               #   else
+                               #           take it from act_all.
+                               #   
+
+                               # We must compare findbad state with act_all state
+                               if nodename not in self.act_all:
+                                       # 1) ok, b/c it's a new problem. set ticket_id to null
+                                       self.mergedb[loginbase][nodename] = {} 
+                                       self.mergedb[loginbase][nodename].update(x)
+                                       self.mergedb[loginbase][nodename]['ticket_id'] = ""
+                                       self.mergedb[loginbase][nodename]['prev_category'] = "NORECORD" 
+                               else: 
+                                       if len(self.act_all[nodename]) == 0:
+                                               self.mergedb[loginbase][nodename] = {} 
+                                               self.mergedb[loginbase][nodename].update(x)
+                                               self.mergedb[loginbase][nodename]['ticket_id'] = ""
+                                               self.mergedb[loginbase][nodename]['prev_category'] = "NORECORD" 
+                                       else:
+                                               y = self.act_all[nodename][0]
+                                               y['prev_category'] = y['category']
+
+                                               self.mergedb[loginbase][nodename] = {}
+                                               self.mergedb[loginbase][nodename].update(y)
+                                               self.mergedb[loginbase][nodename]['comonstats'] = x['comonstats']
+                                               self.mergedb[loginbase][nodename]['category']   = x['category']
+                                               self.mergedb[loginbase][nodename]['state'] = x['state']
+                                               self.mergedb[loginbase][nodename]['kernel']=x['kernel']
+                                               self.mergedb[loginbase][nodename]['bootcd']=x['bootcd']
+                                               self.mergedb[loginbase][nodename]['plcnode']=x['plcnode']
+                                               ticket = get_ticket_id(self.mergedb[loginbase][nodename])
+                                               self.mergedb[loginbase][nodename]['rt'] = mailer.getTicketStatus(ticket)
+
+                                       # delete the entry from cache_all to keep it out of case 3)
+                                       del self.cache_all[nodename]
+
+               # 3) nodes that remin in cache_all were not identified by findbad.
+               #        Do we keep them or not?
+               #   NOTE: i think that since the categories are performed before this
+               #               step now, and by a monitor-controlled agent.
+
+               # TODO: This does not work correctly.  Do we need this? 
+               #for hn in self.cache_all.keys():
+               #       y = self.act_all[hn][0]
+               #       if 'monitor' in y['bucket']:
+               #               loginbase = self.plcdb_hn2lb[hn] 
+               #               if loginbase not in self.sickdb:
+               #                       self.sickdb[loginbase] = {}
+               #               self.sickdb[loginbase][hn] = y
+               #       else:
+               #               del self.cache_all[hn]
+
+               print "len of cache_all: %d" % len(self.cache_all.keys())
+               return
+
+       def sendToRT(self):
+               sorted_sites = self.mergedb.keys()
+               sorted_sites.sort()
+               # look at all problems reported by merge
+               for loginbase in sorted_sites:
+                       d_merge_nodes = self.mergedb[loginbase]
+                       for nodename in d_merge_nodes.keys():
+                               record = self.mergedb[loginbase][nodename]
+                               self.toRT.put(record)
+
+               # send signal to stop reading
+               self.toRT.put(None)
+               return
+
+class Diagnose(Thread):
+       def __init__(self, fromRT):
+               self.fromRT = fromRT
+               self.plcdb_hn2lb = database.dbLoad("plcdb_hn2lb")
+               self.findbad = database.if_cached_else(1, "findbad", lambda : {})
+
+               self.diagnose_in = {}
+               self.diagnose_out = {}
+               Thread.__init__(self)
+
+
+       def run(self):
+               self.accumSickSites()
+
+               print "Accumulated %d sick sites" % len(self.diagnose_in.keys())
+               logger.debug("Accumulated %d sick sites" % len(self.diagnose_in.keys()))
+
+               try:
+                       stats = self.diagnoseAll()
+               except Exception, err:
+                       print "----------------"
+                       import traceback
+                       print traceback.print_exc()
+                       from nodecommon import email_exception
+                       email_exception()
+                       print err
+                       #if config.policysavedb:
+                       sys.exit(1)
+
+               print_stats("sites_observed", stats)
+               print_stats("sites_diagnosed", stats)
+               print_stats("nodes_diagnosed", stats)
+
+               if config.policysavedb:
+                       print "Saving Databases... diagnose_out"
+                       database.dbDump("diagnose_out", self.diagnose_out)
+
+       def accumSickSites(self):
+               """
+               Take all nodes, from l_diagnose, look them up in the diagnose_out database, 
+               and insert them into diagnose_in[] as:
+
+                       diagnose_in[loginbase] = [diag_node1, diag_node2, ...]
+               """
+               while 1:
+                       node_record = self.fromRT.get(block = True)
+                       if node_record == None:
+                               break;
+
+                       nodename = node_record['nodename']
+                       loginbase = self.plcdb_hn2lb[nodename]
+
+                       if loginbase not in self.diagnose_in:
+                               self.diagnose_in[loginbase] = {}
+
+                       self.diagnose_in[loginbase][nodename] = node_record
+
+               return
+
+       def diagnoseAll(self):
+               i_sites_observed = 0
+               i_sites_diagnosed = 0
+               i_nodes_diagnosed = 0
+               i_nodes_actedon = 0
+               i_sites_emailed = 0
+               l_allsites = []
+
+               sorted_sites = self.diagnose_in.keys()
+               sorted_sites.sort()
+               self.diagnose_out= {}
+               for loginbase in sorted_sites:
+                       l_allsites += [loginbase]
+
+                       d_diag_nodes = self.diagnose_in[loginbase]
+                       d_act_records = self.__diagnoseSite(loginbase, d_diag_nodes)
+                       # store records in diagnose_out, for saving later.
+                       self.diagnose_out.update(d_act_records)
+                       
+                       if len(d_act_records[loginbase]['nodes'].keys()) > 0:
+                               i_nodes_diagnosed += (len(d_act_records[loginbase]['nodes'].keys()))
+                               i_sites_diagnosed += 1
+                       i_sites_observed += 1
+
+               return {'sites_observed': i_sites_observed, 
+                               'sites_diagnosed': i_sites_diagnosed, 
+                               'nodes_diagnosed': i_nodes_diagnosed, 
+                               'allsites':l_allsites}
+
+               pass
                
-               # Princeton Backdoor
-               if loginbase == "princeton": return
-
-               # Send appropriate message for node if in appropriate bucket.
-               # If we know where to send a message
-               if not loginbase: 
-                       logger.info("POLICY:  loginbase for %s not found" %node)
-               # And we didn't email already.
+       def getDaysDown(cls, diag_record):
+               daysdown = -1
+               last_contact = diag_record['plcnode']['last_contact']
+               date_created = diag_record['plcnode']['date_created']
+
+               if diag_record['comonstats']['uptime'] != "null" and diag_record['comonstats']['uptime'] != "-1":
+                       daysdown = - int(float(diag_record['comonstats']['uptime'])) // (60*60*24)
+               elif last_contact is None:
+                       if date_created is not None:
+                               now = time.time()
+                               diff = now - date_created
+                               daysdown = diff // (60*60*24)
+                       else:
+                               daysdown = -1
                else:
-                       # If first email, send to Tech
-                       target = [TECHEMAIL % loginbase]
+                       now = time.time()
+                       diff = now - last_contact
+                       daysdown = diff // (60*60*24)
+               return daysdown
+       getDaysDown = classmethod(getDaysDown)
+
+       def getStrDaysDown(cls, diag_record):
+               daysdown = "unknown"
+               last_contact = diag_record['plcnode']['last_contact']
+               date_created = diag_record['plcnode']['date_created']
+
+               if      diag_record['comonstats']['uptime'] != "null" and \
+                       diag_record['comonstats']['uptime'] != "-1":
+                       daysdown = int(float(diag_record['comonstats']['uptime'])) // (60*60*24)
+                       daysdown = "%d days up" % daysdown
+
+               elif last_contact is None:
+                       if date_created is not None:
+                               now = time.time()
+                               diff = now - date_created
+                               daysdown = diff // (60*60*24)
+                               daysdown = "Never contacted PLC, created %s days ago" % daysdown
+                       else:
+                               daysdown = "Never contacted PLC"
+               else:
+                       now = time.time()
+                       diff = now - last_contact
+                       daysdown = diff // (60*60*24)
+                       daysdown = "%s days down" % daysdown
+               return daysdown
+       getStrDaysDown = classmethod(getStrDaysDown)
+       #def getStrDaysDown(cls, diag_record):
+       #       daysdown = cls.getDaysDown(diag_record)
+       #       if daysdown > -1:
+       #               return "%d days down"%daysdown
+       #       elif daysdown == -1:
+       #               return "Has never contacted PLC"
+       #       else:
+       #               return "%d days up"% -daysdown
+       #getStrDaysDown = classmethod(getStrDaysDown)
+
+       def __getCDVersion(self, diag_record, nodename):
+               cdversion = ""
+               #print "Getting kernel for: %s" % diag_record['nodename']
+               cdversion = diag_record['kernel']
+               return cdversion
+
+       def __diagnoseSite(self, loginbase, d_diag_nodes):
+               """
+               d_diag_nodes are diagnose_in entries.
+               """
+               d_diag_site = {loginbase : { 'config' : 
+                                                                                               {'squeeze': False,
+                                                                                                'email': False
+                                                                                               }, 
+                                                                       'nodes': {}
+                                                                       }
+                                          }
+               sorted_nodes = d_diag_nodes.keys()
+               sorted_nodes.sort()
+               for nodename in sorted_nodes:
+                       node_record = d_diag_nodes[nodename]
+                       diag_record = self.__diagnoseNode(loginbase, node_record)
+
+                       if diag_record != None:
+                               d_diag_site[loginbase]['nodes'][nodename] = diag_record
+
+                               # NOTE: improvement means, we need to act/squeeze and email.
+                               #print "DIAG_RECORD", diag_record
+                               if 'monitor-end-record' in diag_record['stage'] or \
+                                  'nmreset' in diag_record['stage']:
+                               #       print "resetting loginbase!" 
+                                       d_diag_site[loginbase]['config']['squeeze'] = True
+                                       d_diag_site[loginbase]['config']['email'] = True
+                               #else:
+                               #       print "NO IMPROVEMENT!!!!"
+                       else:
+                               pass # there is nothing to do for this node.
+
+               # NOTE: these settings can be overridden by command line arguments,
+               #       or the state of a record, i.e. if already in RT's Support Queue.
+               nodes_up = self.getUpAtSite(loginbase, d_diag_site)
+               if nodes_up < MINUP:
+                       d_diag_site[loginbase]['config']['squeeze'] = True
+
+               max_slices = self.getMaxSlices(loginbase)
+               num_nodes = self.getNumNodes(loginbase)
+               # NOTE: when max_slices == 0, this is either a new site (the old way)
+               #       or an old disabled site from previous monitor (before site['enabled'])
+               if nodes_up < num_nodes and max_slices != 0:
+                       d_diag_site[loginbase]['config']['email'] = True
+
+               if len(d_diag_site[loginbase]['nodes'].keys()) > 0:
+                       print "SITE: %20s : %d nodes up, at most" % (loginbase, nodes_up)
+
+               return d_diag_site
+
+       def diagRecordByCategory(self, node_record):
+               nodename = node_record['nodename']
+               category = node_record['category']
+               state    = node_record['state']
+               loginbase = self.plcdb_hn2lb[nodename]
+               diag_record = None
+
+               if  "ERROR" in category:        # i.e. "DOWN"
+                       diag_record = {}
+                       diag_record.update(node_record)
+                       daysdown = self.getDaysDown(diag_record) 
+                       if daysdown < 7:
+                               format = "DIAG: %20s : %-40s Down only %s days  NOTHING DONE"
+                               print format % (loginbase, nodename, daysdown)
+                               return None
+
+                       s_daysdown = self.getStrDaysDown(diag_record)
+                       diag_record['message'] = emailTxt.mailtxt.newdown
+                       diag_record['args'] = {'nodename': nodename}
+                       diag_record['info'] = (nodename, s_daysdown, "")
+
+                       if 'reboot_node_failed' in node_record:
+                               # there was a previous attempt to use the PCU.
+                               if node_record['reboot_node_failed'] == False:
+                                       # then the last attempt apparently, succeeded.
+                                       # But, the category is still 'ERROR'.  Therefore, the
+                                       # PCU-to-Node mapping is broken.
+                                       #print "Setting message for ERROR node to PCU2NodeMapping: %s" % nodename
+                                       diag_record['message'] = emailTxt.mailtxt.pcutonodemapping
+                                       diag_record['email_pcu'] = True
+
+                       if 'ticket_id' in diag_record:
+                               if diag_record['ticket_id'] == "":
+                                       if 'found_rt_ticket' in diag_record:
+                                               ticket_id = diag_record['found_rt_ticket']
+                                       else:
+                                               ticket_id = "None"
+                               else:
+                                       ticket_id = diag_record['ticket_id']
+                       else:
+                               ticket_id = "None"
+
+                       diag_record['log'] = "DOWN: %20s : %-40s == %20s %s" % \
+                                       (loginbase, nodename, diag_record['info'][1:], ticket_id)
+
+               elif "OLDBOOTCD" in category:
+                       # V2 boot cds as determined by findbad
+                       s_daysdown = self.getStrDaysDown(node_record)
+                       s_cdversion = self.__getCDVersion(node_record, nodename)
+                       diag_record = {}
+                       diag_record.update(node_record)
+                       #if "2.4" in diag_record['kernel'] or "v2" in diag_record['bootcd']:
+                       diag_record['message'] = emailTxt.mailtxt.newbootcd
+                       diag_record['args'] = {'nodename': nodename}
+                       diag_record['info'] = (nodename, s_daysdown, s_cdversion)
+                       if diag_record['ticket_id'] == "":
+                               diag_record['log'] = "BTCD: %20s : %-40s == %20s %20s %s" % \
+                                                                       (loginbase, nodename, diag_record['kernel'], 
+                                                                        diag_record['bootcd'], diag_record['found_rt_ticket'])
+                       else:
+                               diag_record['log'] = "BTCD: %20s : %-40s == %20s %20s %s" % \
+                                                                       (loginbase, nodename, diag_record['kernel'], 
+                                                                        diag_record['bootcd'], diag_record['ticket_id'])
+
+               elif "PROD" in category:
+                       if "DEBUG" in state:
+                               # Not sure what to do with these yet.  Probably need to
+                               # reboot, and email.
+                               print "DEBG: %20s : %-40s  NOTHING DONE" % (loginbase, nodename)
+                               return None
+                       elif "BOOT" in state:
+                               # no action needed.
+                               # TODO: remove penalties, if any are applied.
+                               now = time.time()
+                               last_contact = node_record['plcnode']['last_contact']
+                               if last_contact == None:
+                                       time_diff = 0
+                               else:
+                                       time_diff = now - last_contact;
+
+                               if 'improvement' in node_record['stage']:
+                                       # then we need to pass this on to 'action'
+                                       diag_record = {}
+                                       diag_record.update(node_record)
+                                       diag_record['message'] = emailTxt.mailtxt.newthankyou
+                                       diag_record['args'] = {'nodename': nodename}
+                                       diag_record['info'] = (nodename, node_record['prev_category'], 
+                                                                                                        node_record['category'])
+                                       if 'email_pcu' in diag_record:
+                                               if diag_record['email_pcu']:
+                                                       # previously, the pcu failed to reboot, so send
+                                                       # email. Now, reset these values to try the reboot
+                                                       # again.
+                                                       diag_record['email_pcu'] = False
+                                                       del diag_record['reboot_node_failed']
+
+                                       if diag_record['ticket_id'] == "":
+                                               diag_record['log'] = "IMPR: %20s : %-40s == %20s %20s %s %s" % \
+                                                                       (loginbase, nodename, diag_record['stage'], 
+                                                                        state, category, diag_record['found_rt_ticket'])
+                                       else:
+                                               diag_record['log'] = "IMPR: %20s : %-40s == %20s %20s %s %s" % \
+                                                                       (loginbase, nodename, diag_record['stage'], 
+                                                                        state, category, diag_record['ticket_id'])
+                                       return diag_record
+                               #elif time_diff >= 6*SPERHOUR:
+                               #       # heartbeat is older than 30 min.
+                               #       # then reset NM.
+                               #       #print "Possible NM problem!! %s - %s = %s" % (now, last_contact, time_diff)
+                               #       diag_record = {}
+                               #       diag_record.update(node_record)
+                               #       diag_record['message'] = emailTxt.mailtxt.NMReset
+                               #       diag_record['args'] = {'nodename': nodename}
+                               #       diag_record['stage'] = "nmreset"
+                               #       diag_record['info'] = (nodename, 
+                               #                                                       node_record['prev_category'], 
+                               #                                                       node_record['category'])
+                               #       if diag_record['ticket_id'] == "":
+                               #               diag_record['log'] = "NM  : %20s : %-40s == %20s %20s %s %s" % \
+                               #                                       (loginbase, nodename, diag_record['stage'], 
+                               #                                        state, category, diag_record['found_rt_ticket'])
+                               #       else:
+                               #               diag_record['log'] = "NM  : %20s : %-40s == %20s" % \
+                               #                                       (loginbase, nodename, diag_record['stage'])
+#
+#                                      return diag_record
+                               else:
+                                       return None
+                       else:
+                               # unknown
+                               pass
+               elif "ALPHA"    in category:
+                       pass
+               elif "clock_drift" in category:
+                       pass
+               elif "dns"    in category:
+                       pass
+               elif "filerw"    in category:
+                       pass
+               else:
+                       print "Unknown category!!!! %s" % category
+                       sys.exit(1)
+
+               return diag_record
+
+       def __diagnoseNode(self, loginbase, node_record):
+               # TODO: change the format of the hostname in this 
+               #               record to something more natural.
+               nodename                = node_record['nodename']
+               category                = node_record['category']
+               prev_category   = node_record['prev_category']
+               state                   = node_record['state']
+               #if 'prev_category' in node_record:
+               #       prev_category = node_record['prev_category']
+               #else:
+               #       prev_category = "ERROR"
+               if node_record['prev_category'] != "NORECORD":
+               
+                       val = cmpCategoryVal(category, prev_category)
+                       print "%s went from %s -> %s" % (nodename, prev_category, category)
+                       if val == 1:
+                               # improved
+                               if node_record['ticket_id'] == "" or node_record['ticket_id'] == None:
+                                       print "closing record with no ticket: ", node_record['nodename']
+                                       node_record['action'] = ['close_rt']
+                                       node_record['message'] = None
+                                       node_record['stage'] = 'monitor-end-record'
+                                       return node_record
+                               else:
+                                       node_record['stage'] = 'improvement'
+
+                               #if 'monitor-end-record' in node_record['stage']:
+                               #       # just ignore it if it's already ended.
+                               #       # otherwise, the status should be worse, and we won't get
+                               #       # here.
+                               #       print "monitor-end-record: ignoring ", node_record['nodename']
+                               #       return None
+#
+#                                      #return None
+                       elif val == -1:
+                               # current category is worse than previous, carry on
+                               pass
+                       else:
+                               #values are equal, carry on.
+                               #print "why are we here?"
+                               pass
+
+               if 'rt' in node_record and 'Status' in node_record['rt']:
+                       if node_record['stage'] == 'ticket_waitforever':
+                               if 'resolved' in node_record['rt']['Status']:
+                                       print "ending waitforever record for: ", node_record['nodename']
+                                       node_record['action'] = ['noop']
+                                       node_record['message'] = None
+                                       node_record['stage'] = 'monitor-end-record'
+                                       print "oldlog: %s" % node_record['log'],
+                                       print "%15s" % node_record['action']
+                                       return node_record
+                               if 'new' in node_record['rt']['Status'] and \
+                                       'Queue' in node_record['rt'] and \
+                                       'Monitor' in node_record['rt']['Queue']:
+
+                                       print "RESETTING stage to findbad"
+                                       node_record['stage'] = 'findbad'
                        
-                       # If disk is foobarred, PLC should check it.
-                       if (node in self.cmn.filerw) and \
-                       (node not in self.emailed.keys()):
-                               self.__actOnFilerw(node)
-                               return 
-
-                       # If in dbg, set to rins, then reboot.  Inform PLC.
-                       if (node in self.cmn.dbg):
-                       # If reboot failure via PCU, POD and send email
-                       # if contacted PCU, return
-                               if self.__actOnDebug(node):  return
-
-                       if (node in self.emailed.keys()) and \
-                       (node not in self.cmn.filerw)    and \
-                       (node not in self.cmn.clock_drift):
-                               # If we emailed before, how long ago?   
-                               delta = time.time() - self.emailed[node][1]
-                               if delta < SPERDAY:  
-                                       logger.info("POLICY:  already acted on %s today." % node)
-                                       return
-
-                               logger.info("POLICY:  acted %s on %s days ago" % (node, 
-                               delta // SPERDAY))
+               #### COMPARE category and prev_category
+               # if not_equal
+               #       then assign a stage based on relative priorities
+               # else equal
+               #       then check category for stats.
+               diag_record = self.diagRecordByCategory(node_record)
+               if diag_record == None:
+                       #print "diag_record == None"
+                       return None
+
+               #### found_RT_ticket
+               # TODO: need to record time found, and maybe add a stage for acting on it...
+               # NOTE: after found, if the support ticket is resolved, the block is
+               #               not removed. How to remove the block on this?
+               if 'found_rt_ticket' in diag_record and \
+                       diag_record['found_rt_ticket'] is not None:
+                       if diag_record['stage'] is not 'improvement':
+                               diag_record['stage'] = 'ticket_waitforever'
+                               
+               current_time = time.time()
+               # take off four days, for the delay that database caused.
+               # TODO: generalize delays at PLC, and prevent enforcement when there
+               #               have been no emails.
+               # NOTE: 7*SPERDAY exists to offset the 'bad week'
+               #delta = current_time - diag_record['time'] - 7*SPERDAY
+               delta = current_time - diag_record['time']
+
+               message = diag_record['message']
+               act_record = {}
+               act_record.update(diag_record)
+
+               #### DIAGNOSE STAGES 
+               if   'findbad' in diag_record['stage']:
+                       # The node is bad, and there's no previous record of it.
+                       act_record['email'] = TECH
+                       act_record['action'] = ['noop']
+                       act_record['message'] = message[0]
+                       act_record['stage'] = 'stage_actinoneweek'
+
+               elif 'nmreset' in diag_record['stage']:
+                       act_record['email']  = ADMIN 
+                       act_record['action'] = ['reset_nodemanager']
+                       act_record['message'] = message[0]
+                       act_record['stage']  = 'nmreset'
+                       return None
+
+               elif 'reboot_node' in diag_record['stage']:
+                       act_record['email'] = TECH
+                       act_record['action'] = ['noop']
+                       act_record['message'] = message[0]
+                       act_record['stage'] = 'stage_actinoneweek'
                        
-                               # If no luck with tech, email PI
-                               if (delta >= 1):
-                                       target.append(PIEMAIL % loginbase)
-
-                               # If more than PI thresh, but less than slicethresh
-                               if (delta >= PITHRESH) and (delta < SLICETHRESH): 
-                                       #remove slice creation if enough nodes arent up
-                                       if not self.enoughUp(loginbase):
-                                               slices = plc.slices(loginbase)
-                                               if len(slices) >= 1:
-                                                       for slice in slices:
-                                                               target.append(SLICEMAIL % slice)
-                                               logger.info("POLICY:  Removing slice creation from %s" % loginbase)
-                                               tmp = emailTxt.mailtxt.removedSliceCreation
-                                               sbj = tmp[0] 
-                                               msg = tmp[1] % {'loginbase': loginbase}
-                                               plc.removeSliceCreation(node)
-                                               mailer.email(sbj, msg, target)  
-                                               self.squeezed[loginbase] = (time.time(), "creation")
-                                               self.emailed[node] = ("creation", time.time())  
-                                               return
-
-                               # If more than PI thresh and slicethresh
-                               if (delta >= PITHRESH) and (delta > SLICETHRESH):
-                                       target.append(PIEMAIL % loginbase)
-                                       # Email slices at site.
-                                       slices = plc.slices(loginbase)
-                                       if len(slices) >= 1:
-                                               for slice in slices:
-                                                       target.append(SLICEMAIL % slice)
-                                       # If not enough up, freeze slices and email everyone.
-                                       if not self.enoughUp(loginbase):
-                                               logger.info("POLICY:  Suspending %s slices." % loginbase)
-                                               tmp = emailTxt.mailtxt.suspendSlices
-                                               sbj = tmp[0] 
-                                               msg = tmp[1] % {'loginbase': loginbase}
-                                               plc.suspendSlices(node)
-                                               self.squeezed[loginbase] = (time.time(), "freeze")
-                                               mailer.email(sbj, msg, target)  
-                                               self.emailed[node] = ("freeze", time.time())    
-                                               return
-
-                       # Find the bucket the node is in and send appropriate email
-                       # to approriate list of people.
-                       for bkt in self.cmn.comonbkts.keys():
-                               if (node in getattr(self.cmn, bkt)):
-                                       # Send predefined message for that bucket.
-                                       logger.info("POLICY: Emailing (%s) %s - %s"\
-                                               %(bkt, node, target))
-                                       tmp = getattr(emailTxt.mailtxt, bkt)
-                                       sbj = tmp[0] % {'hostname': node}
-                                       msg = tmp[1] % {'hostname': node}
-                                       mailer.email(sbj, msg, target)  
-                                       self.emailed[node] = (bkt , time.time())
-                                       return
-
-
-       '''
-       Prints, logs, and emails status of up nodes, down nodes, and buckets.
-       '''
-       def status(self):
-               sub = "Monitor Summary"
-               msg = "\nThe following nodes were acted upon:  \n\n"
-               for (node, (type, date)) in self.emailed.items():
-                       # Print only things acted on today.
-                       if (time.gmtime(time.time())[2] == time.gmtime(date)[2]):
-                               msg +="%s\t(%s)\t%s\n" %(node, type, time.ctime(date))
-               msg +="\n\nThe following sites have been 'squeezed':\n\n"
-               for (loginbase, (date, type)) in self.squeezed.items():
-                       # Print only things acted on today.
-                       if (time.gmtime(time.time())[2] == time.gmtime(date)[2]):
-                               msg +="%s\t(%s)\t%s\n" %(loginbase, type, time.ctime(date))
-               mailer.email(sub, msg, [SUMTO])
-               logger.info(msg)
-               return 
-
-       '''
-       Store/Load state of emails.  When, where, what.
-       '''
-       def emailedStore(self, action):
+               elif 'improvement' in diag_record['stage']:
+                       # - backoff previous squeeze actions (slice suspend, nocreate)
+                       # TODO: add a backoff_squeeze section... Needs to runthrough
+                       print "backing off of %s" % nodename
+                       act_record['action'] = ['close_rt']
+                       act_record['message'] = message[0]
+                       act_record['stage'] = 'monitor-end-record'
+
+               elif 'actinoneweek' in diag_record['stage']:
+                       if delta >= 7 * SPERDAY: 
+                               act_record['email'] = TECH | PI
+                               act_record['stage'] = 'stage_actintwoweeks'
+                               act_record['message'] = message[1]
+                               act_record['action'] = ['nocreate' ]
+                               act_record['time'] = current_time               # reset clock for waitforever
+                       elif delta >= 3* SPERDAY and not 'second-mail-at-oneweek' in act_record:
+                               act_record['email'] = TECH 
+                               act_record['message'] = message[0]
+                               act_record['action'] = ['sendmailagain-waitforoneweekaction' ]
+                               act_record['second-mail-at-oneweek'] = True
+                       else:
+                               act_record['message'] = None
+                               act_record['action'] = ['waitforoneweekaction' ]
+                               print "ignoring this record for: %s" % act_record['nodename']
+                               return None                     # don't send if there's no action
+
+               elif 'actintwoweeks' in diag_record['stage']:
+                       if delta >= 7 * SPERDAY:
+                               act_record['email'] = TECH | PI | USER
+                               act_record['stage'] = 'stage_waitforever'
+                               act_record['message'] = message[2]
+                               act_record['action'] = ['suspendslices']
+                               act_record['time'] = current_time               # reset clock for waitforever
+                       elif delta >= 3* SPERDAY and not 'second-mail-at-twoweeks' in act_record:
+                               act_record['email'] = TECH | PI
+                               act_record['message'] = message[1]
+                               act_record['action'] = ['sendmailagain-waitfortwoweeksaction' ]
+                               act_record['second-mail-at-twoweeks'] = True
+                       else:
+                               act_record['message'] = None
+                               act_record['action'] = ['waitfortwoweeksaction']
+                               return None                     # don't send if there's no action
+
+               elif 'ticket_waitforever' in diag_record['stage']:
+                       act_record['email'] = TECH
+                       if 'first-found' not in act_record:
+                               act_record['first-found'] = True
+                               act_record['log'] += " firstfound"
+                               act_record['action'] = ['ticket_waitforever']
+                               act_record['message'] = message[0]
+                               act_record['time'] = current_time
+                       else:
+                               if delta >= 7*SPERDAY:
+                                       act_record['action'] = ['ticket_waitforever']
+                                       if 'rt' in act_record and 'Status' in act_record['rt'] and \
+                                                       act_record['rt']['Status'] == 'new':
+                                               act_record['message'] = message[0]
+                                       else:
+                                               act_record['message'] = None
+                                               
+                                       act_record['time'] = current_time               # reset clock
+                               else:
+                                       act_record['action'] = ['ticket_waitforever']
+                                       act_record['message'] = None
+                                       return None
+
+               elif 'waitforever' in diag_record['stage']:
+                       # more than 3 days since last action
+                       # TODO: send only on weekdays.
+                       # NOTE: expects that 'time' has been reset before entering waitforever stage
+                       if delta >= 3*SPERDAY:
+                               act_record['action'] = ['email-againwaitforever']
+                               act_record['message'] = message[2]
+                               act_record['time'] = current_time               # reset clock
+                       else:
+                               act_record['action'] = ['waitforever']
+                               act_record['message'] = None
+                               return None                     # don't send if there's no action
+
+               else:
+                       # There is no action to be taken, possibly b/c the stage has
+                       # already been performed, but diagnose picked it up again.
+                       # two cases, 
+                       #       1. stage is unknown, or 
+                       #       2. delta is not big enough to bump it to the next stage.
+                       # TODO: figure out which. for now assume 2.
+                       print "UNKNOWN stage for %s; nothing done" % nodename
+                       act_record['action'] = ['unknown']
+                       act_record['message'] = message[0]
+
+                       act_record['email'] = TECH
+                       act_record['action'] = ['noop']
+                       act_record['message'] = message[0]
+                       act_record['stage'] = 'stage_actinoneweek'
+                       act_record['time'] = current_time               # reset clock
+                       #print "Exiting..."
+                       #return None
+                       #sys.exit(1)
+
+               print "%s" % act_record['log'],
+               print "%15s" % act_record['action']
+               return act_record
+
+       def getMaxSlices(self, loginbase):
+               # if sickdb has a loginbase, then it will have at least one node.
+               site_stats = None
+
+               for nodename in self.diagnose_in[loginbase].keys():
+                       if nodename in self.findbad['nodes']:
+                               site_stats = self.findbad['nodes'][nodename]['values']['plcsite']
+                               break
+
+               if site_stats == None:
+                       raise Exception, "loginbase with no nodes in findbad"
+               else:
+                       return site_stats['max_slices']
+
+       def getNumNodes(self, loginbase):
+               # if sickdb has a loginbase, then it will have at least one node.
+               site_stats = None
+
+               for nodename in self.diagnose_in[loginbase].keys():
+                       if nodename in self.findbad['nodes']:
+                               site_stats = self.findbad['nodes'][nodename]['values']['plcsite']
+                               break
+
+               if site_stats == None:
+                       raise Exception, "loginbase with no nodes in findbad"
+               else:
+                       if 'num_nodes' in site_stats:
+                               return site_stats['num_nodes']
+                       else:
+                               return 0
+
+       """
+       Returns number of up nodes as the total number *NOT* in act_all with a
+       stage other than 'steady-state' .
+       """
+       def getUpAtSite(self, loginbase, d_diag_site):
+               # TODO: THIS DOESN"T WORK!!! it misses all the 'debug' state nodes
+               #               that aren't recorded yet.
+
+               numnodes = self.getNumNodes(loginbase)
+               # NOTE: assume nodes we have no record of are ok. (too conservative)
+               # TODO: make the 'up' value more representative
+               up = numnodes
+               for nodename in d_diag_site[loginbase]['nodes'].keys():
+
+                       rec = d_diag_site[loginbase]['nodes'][nodename]
+                       if rec['stage'] != 'monitor-end-record':
+                               up -= 1
+                       else:
+                               pass # the node is assumed to be up.
+
+               #if up != numnodes:
+               #       print "ERROR: %s total nodes up and down != %d" % (loginbase, numnodes)
+
+               return up
+
+
+class SiteAction:
+       def __init__(self, parameter_names=['hostname', 'ticket_id']):
+               self.parameter_names = parameter_names
+       def checkParam(self, args):
+               for param in self.parameter_names:
+                       if param not in args:
+                               raise Exception("Parameter %s not provided in args"%param)
+       def run(self, args):
+               self.checkParam(args)
+               return self._run(args)
+       def _run(self, args):
+               pass
+
+class SuspendAction(SiteAction):
+       def _run(self, args):
+               return plc.suspendSlices(args['hostname'])
+
+class RemoveSliceCreation(SiteAction):
+       def _run(self, args):
+               return plc.removeSliceCreation(args['hostname'])
+
+class BackoffActions(SiteAction):
+       def _run(self, args):
+               plc.enableSlices(args['hostname'])
+               plc.enableSliceCreation(args['hostname'])
+               return True
+
+# TODO: create class for each action below, 
+#              allow for lists of actions to be performed...
+
+
+
+def reset_nodemanager(args):
+       os.system("ssh root@%s /sbin/service nm restart" % nodename)
+       return
+
+class Action(Thread):
+       def __init__(self, l_action):
+               self.l_action = l_action
+
+               # the hostname to loginbase mapping
+               self.plcdb_hn2lb = database.dbLoad("plcdb_hn2lb")
+
+               # Actions to take.
+               self.diagnose_db = database.if_cached_else(1, "diagnose_out", lambda : {})
+               # Actions taken.
+               self.act_all   = database.if_cached_else(1, "act_all", lambda : {})
+
+               # A dict of actions to specific functions. PICKLE doesnt' like lambdas.
+               self.actions = {}
+               self.actions['suspendslices'] = lambda args: plc.suspendSlices(args['hostname'])
+               self.actions['nocreate'] = lambda args: plc.removeSliceCreation(args['hostname'])
+               self.actions['close_rt'] = lambda args: close_rt_backoff(args)
+               self.actions['rins'] = lambda args: plc.nodeBootState(args['hostname'], "reinstall")    
+               self.actions['noop'] = lambda args: args
+               self.actions['reboot_node'] = lambda args: reboot_node(args)
+               self.actions['reset_nodemanager'] = lambda args: args # reset_nodemanager(args)
+
+               self.actions['ticket_waitforever'] = lambda args: args
+               self.actions['waitforever'] = lambda args: args
+               self.actions['unknown'] = lambda args: args
+               self.actions['waitforoneweekaction'] = lambda args: args
+               self.actions['waitfortwoweeksaction'] = lambda args: args
+               self.actions['sendmailagain-waitforoneweekaction'] = lambda args: args
+               self.actions['sendmailagain-waitfortwoweeksaction'] = lambda args: args
+               self.actions['email-againwaitforever'] = lambda args: args
+               self.actions['email-againticket_waitforever'] = lambda args: args
+                               
+
+               self.sickdb = {}
+               Thread.__init__(self)
+
+       def run(self):
+               self.accumSites()
+               print "Accumulated %d sick sites" % len(self.sickdb.keys())
+               logger.debug("Accumulated %d sick sites" % len(self.sickdb.keys()))
+
                try:
-                       if action == "LOAD":
-                               f = open(DAT, "r+")
-                               logger.info("POLICY:  Found and reading " + DAT)
-                               self.emailed.update(pickle.load(f))
-                       if action == "WRITE":
-                               f = open(DAT, "w")
-                               #logger.debug("Writing " + DAT)
-                               pickle.dump(self.emailed, f)
-                       f.close()
+                       stats = self.analyseSites()
                except Exception, err:
-                       logger.info("POLICY:  Problem with DAT, %s" %err)
-
-       '''
-       Returns True if more than MINUP nodes are up at a site.
-       '''
-       def enoughUp(self, loginbase):
-               allsitenodes = plc.getSiteNodes(loginbase)
-               if len(allsitenodes) == 0:
-                       logger.info("Node not in db")
-                       return
-
-               numnodes = len(allsitenodes)
-               sicknodes = []
-               # Get all sick nodes from comon
-               for bucket in self.cmn.comonbkts.keys():
-                       for host in getattr(self.cmn, bucket):
-                               sicknodes.append(host)
-               # Diff.
-               for node in allsitenodes:
-                       if node in sicknodes:
-                               numnodes -= 1
-
-               if numnodes < MINUP:
-                       logger.info(\
-"POLICY:  site with %s has nodes %s up." %(loginbase, numnodes))
-                       return False 
-               else: 
-                       return True 
+                       print "----------------"
+                       import traceback
+                       print traceback.print_exc()
+                       print err
+                       if config.policysavedb:
+                               print "Saving Databases... act_all"
+                               database.dbDump("act_all", self.act_all)
+                       sys.exit(1)
+
+               print_stats("sites_observed", stats)
+               print_stats("sites_diagnosed", stats)
+               print_stats("nodes_diagnosed", stats)
+               print_stats("sites_emailed", stats)
+               print_stats("nodes_actedon", stats)
+               print string.join(stats['allsites'], ",")
+
+               if config.policysavedb:
+                       print "Saving Databases... act_all"
+                       #database.dbDump("policy.eventlog", self.eventlog)
+                       # TODO: remove 'diagnose_out', 
+                       #       or at least the entries that were acted on.
+                       database.dbDump("act_all", self.act_all)
+
+       def accumSites(self):
+               """
+               Take all nodes, from l_action, look them up in the diagnose_db database, 
+               and insert them into sickdb[] as:
+
+               This way only the given l_action nodes will be acted on regardless
+               of how many from diagnose_db are available.
+
+                       sickdb[loginbase][nodename] = diag_record
+               """
+               # TODO: what if l_action == None ?
+               for nodename in self.l_action:
+
+                       loginbase = self.plcdb_hn2lb[nodename]
+
+                       if loginbase in self.diagnose_db and \
+                               nodename in self.diagnose_db[loginbase]['nodes']:
+
+                               diag_record = self.diagnose_db[loginbase]['nodes'][nodename]
+
+                               if loginbase not in self.sickdb:
+                                       self.sickdb[loginbase] = {'nodes' : {}}
+
+                               # NOTE: don't copy all node records, since not all will be in l_action
+                               self.sickdb[loginbase]['nodes'][nodename] = diag_record
+                               # NOTE: but, we want to get the loginbase config settings, 
+                               #               this is the easiest way.
+                               self.sickdb[loginbase]['config'] = self.diagnose_db[loginbase]['config']
+                       #else:
+                               #print "%s not in diagnose_db!!" % loginbase
+               return
+
+       def __emailSite(self, loginbase, roles, message, args):
+               """
+               loginbase is the unique site abbreviation, prepended to slice names.
+               roles contains TECH, PI, USER roles, and derive email aliases.
+               record contains {'message': [<subj>,<body>], 'args': {...}} 
+               """
+               ticket_id = 0
+               args.update({'loginbase':loginbase})
+
+               if not config.mail and not config.debug and config.bcc:
+                       roles = ADMIN
+               if config.mail and config.debug:
+                       roles = ADMIN
+
+               # build targets
+               contacts = []
+               if ADMIN & roles:
+                       contacts += [config.email]
+               if TECH & roles:
+                       contacts += [TECHEMAIL % loginbase]
+               if PI & roles:
+                       contacts += [PIEMAIL % loginbase]
+               if USER & roles:
+                       slices = plc.slices(loginbase)
+                       if len(slices) >= 1:
+                               for slice in slices:
+                                       contacts += [SLICEMAIL % slice]
+                               print "SLIC: %20s : %d slices" % (loginbase, len(slices))
+                       else:
+                               print "SLIC: %20s : 0 slices" % loginbase
+
+               try:
+                       subject = message[0] % args
+                       body = message[1] % args
+                       if ADMIN & roles:
+                               # send only to admin
+                               if 'ticket_id' in args:
+                                       subj = "Re: [PL #%s] %s" % (args['ticket_id'], subject)
+                               else:
+                                       subj = "Re: [PL noticket] %s" % subject
+                               mailer.email(subj, body, contacts)
+                               ticket_id = args['ticket_id']
+                       else:
+                               ticket_id = mailer.emailViaRT(subject, body, contacts, args['ticket_id'])
+               except Exception, err:
+                       print "exception on message:"
+                       import traceback
+                       print traceback.print_exc()
+                       print message
+
+               return ticket_id
+
+
+       def _format_diaginfo(self, diag_node):
+               info = diag_node['info']
+               if diag_node['stage'] == 'monitor-end-record':
+                       hlist = "    %s went from '%s' to '%s'\n" % (info[0], info[1], info[2]) 
+               else:
+                       hlist = "    %s %s - %s\n" % (info[0], info[2], info[1]) #(node,ver,daysdn)
+               return hlist
+
+
+       def get_email_args(self, act_recordlist, loginbase=None):
+
+               email_args = {}
+               email_args['hostname_list'] = ""
+
+               for act_record in act_recordlist:
+                       email_args['hostname_list'] += act_record['msg_format']
+                       email_args['hostname'] = act_record['nodename']
+                       if  'plcnode' in act_record and \
+                               'pcu_ids' in act_record['plcnode'] and \
+                               len(act_record['plcnode']['pcu_ids']) > 0:
+                               print "setting 'pcu_id' for email_args %s"%email_args['hostname']
+                               email_args['pcu_id'] = act_record['plcnode']['pcu_ids'][0]
+                       else:
+                               email_args['pcu_id'] = "-1"
+                                       
+                       if 'ticket_id' in act_record:
+                               if act_record['ticket_id'] == 0 or act_record['ticket_id'] == '0':
+                                       print "Enter the ticket_id for %s @ %s" % (loginbase, act_record['nodename'])
+                                       sys.stdout.flush()
+                                       line = sys.stdin.readline()
+                                       try:
+                                               ticket_id = int(line)
+                                       except:
+                                               print "could not get ticket_id from stdin..."
+                                               os._exit(1)
+                               else:
+                                       ticket_id = act_record['ticket_id']
+                                       
+                               email_args['ticket_id'] = ticket_id
+
+               return email_args
+
+       def get_unique_issues(self, act_recordlist):
+               # NOTE: only send one email per site, per problem...
+               unique_issues = {}
+               for act_record in act_recordlist:
+                       act_key = act_record['action'][0]
+                       if act_key not in unique_issues:
+                               unique_issues[act_key] = []
+                               
+                       unique_issues[act_key] += [act_record]
                        
+               return unique_issues
+                       
+
+       def __actOnSite(self, loginbase, site_record):
+               i_nodes_actedon = 0
+               i_nodes_emailed = 0
+
+               act_recordlist = []
+
+               for nodename in site_record['nodes'].keys():
+                       diag_record = site_record['nodes'][nodename]
+                       act_record  = self.__actOnNode(diag_record)
+                       #print "nodename: %s %s" % (nodename, act_record)
+                       if act_record is not None:
+                               act_recordlist += [act_record]
+
+               unique_issues = self.get_unique_issues(act_recordlist)
+
+               for issue in unique_issues.keys():
+                       print "\tworking on issue: %s" % issue
+                       issue_record_list = unique_issues[issue]
+                       email_args = self.get_email_args(issue_record_list, loginbase)
+
+                       # for each record.
+                       for act_record in issue_record_list:
+                               # if there's a pcu record and email config is set
+                               if 'email_pcu' in act_record:
+                                       if act_record['message'] != None and act_record['email_pcu'] and site_record['config']['email']:
+                                               # and 'reboot_node' in act_record['stage']:
+
+                                               email_args['hostname'] = act_record['nodename']
+                                               ticket_id = self.__emailSite(loginbase, 
+                                                                                       act_record['email'], 
+                                                                                       emailTxt.mailtxt.pcudown[0],
+                                                                                       email_args)
+                                               if ticket_id == 0:
+                                                       # error.
+                                                       print "got a ticket_id == 0!!!! %s" % act_record['nodename']
+                                                       os._exit(1)
+                                                       pass
+                                               email_args['ticket_id'] = ticket_id
+
+                       
+                       act_record = issue_record_list[0]
+                       # send message before squeezing
+                       print "\t\tconfig.email: %s and %s" % (act_record['message'] != None, 
+                                                                                               site_record['config']['email'])
+                       if act_record['message'] != None and site_record['config']['email']:
+                               ticket_id = self.__emailSite(loginbase, act_record['email'], 
+                                                                                        act_record['message'], email_args)
+
+                               if ticket_id == 0:
+                                       # error.
+                                       print "ticket_id == 0 for %s %s" % (loginbase, act_record['nodename'])
+                                       os._exit(1)
+                                       pass
+
+                               # Add ticket_id to ALL nodenames
+                               for act_record in issue_record_list:
+                                       nodename = act_record['nodename']
+                                       # update node record with RT ticket_id
+                                       if nodename in self.act_all:
+                                               self.act_all[nodename][0]['ticket_id'] = "%s" % ticket_id
+                                               # if the ticket was previously resolved, reset it to new.
+                                               if 'rt' in act_record and \
+                                                       'Status' in act_record['rt'] and \
+                                                       act_record['rt']['Status'] == 'resolved':
+                                                       mailer.setTicketStatus(ticket_id, "new")
+                                               status = mailer.getTicketStatus(ticket_id)
+                                               self.act_all[nodename][0]['rt'] = status
+                                       if config.mail: i_nodes_emailed += 1
+
+                       print "\t\tconfig.squeeze: %s and %s" % (config.squeeze,
+                                                                                                       site_record['config']['squeeze'])
+                       if config.squeeze and site_record['config']['squeeze']:
+                               for act_key in act_record['action']:
+                                       self.actions[act_key](email_args)
+                               i_nodes_actedon += 1
                
+               if config.policysavedb:
+                       print "Saving Databases... act_all, diagnose_out"
+                       database.dbDump("act_all", self.act_all)
+                       # remove site record from diagnose_out, it's in act_all as done.
+                       del self.diagnose_db[loginbase]
+                       database.dbDump("diagnose_out", self.diagnose_db)
 
+               print "sleeping for 1 sec"
+               time.sleep(1)
+               #print "Hit enter to continue..."
+               #sys.stdout.flush()
+               #line = sys.stdin.readline()
 
-       def run(self):
-               while 1:
-                       self.actOnSick()
-                       self.emailedStore("WRITE")
+               return (i_nodes_actedon, i_nodes_emailed)
+
+       def __actOnNode(self, diag_record):
+               nodename = diag_record['nodename']
+               message = diag_record['message']
+
+               act_record = {}
+               act_record.update(diag_record)
+               act_record['nodename'] = nodename
+               act_record['msg_format'] = self._format_diaginfo(diag_record)
+               print "act_record['stage'] == %s " % act_record['stage']
+
+               # avoid end records, and nmreset records                                        
+               # reboot_node_failed, is set below, so don't reboot repeatedly.
 
+               if 'monitor-end-record' not in act_record['stage'] and \
+                  'nmreset' not in act_record['stage'] and \
+                  'reboot_node_failed' not in act_record:
+
+                       if "DOWN" in act_record['log'] and \
+                                       'pcu_ids' in act_record['plcnode'] and \
+                                       len(act_record['plcnode']['pcu_ids']) > 0:
+
+                               print "%s" % act_record['log'],
+                               print "%15s" % (['reboot_node'],)
+                               # Set node to re-install
+                               plc.nodeBootState(act_record['nodename'], "reinstall")  
+                               try:
+                                       ret = reboot_node({'hostname': act_record['nodename']})
+                               except Exception, exc:
+                                       print "exception on reboot_node:"
+                                       import traceback
+                                       print traceback.print_exc()
+                                       ret = False
+
+                               if ret: # and ( 'reboot_node_failed' not in act_record or act_record['reboot_node_failed'] == False):
+                                       # Reboot Succeeded
+                                       print "reboot succeeded for %s" % act_record['nodename']
+                                       act_record2 = {}
+                                       act_record2.update(act_record)
+                                       act_record2['action'] = ['reboot_node']
+                                       act_record2['stage'] = "reboot_node"
+                                       act_record2['reboot_node_failed'] = False
+                                       act_record2['email_pcu'] = False
+
+                                       if nodename not in self.act_all: 
+                                               self.act_all[nodename] = []
+                                       print "inserting 'reboot_node' record into act_all"
+                                       self.act_all[nodename].insert(0,act_record2)
+
+                                       # return None to avoid further action
+                                       print "Taking no further action"
+                                       return None
+                               else:
+                                       print "reboot failed for %s" % act_record['nodename']
+                                       # set email_pcu to also send pcu notice for this record.
+                                       act_record['reboot_node_failed'] = True
+                                       act_record['email_pcu'] = True
+
+                       print "%s" % act_record['log'],
+                       print "%15s" % act_record['action']
+
+               if act_record['stage'] is not 'monitor-end-record' and \
+                  act_record['stage'] is not 'nmreset':
+                       if nodename not in self.act_all: 
+                               self.act_all[nodename] = []
+
+                       self.act_all[nodename].insert(0,act_record)
+               else:
+                       print "Not recording %s in act_all" % nodename
+
+               return act_record
+
+       def analyseSites(self):
+               i_sites_observed = 0
+               i_sites_diagnosed = 0
+               i_nodes_diagnosed = 0
+               i_nodes_actedon = 0
+               i_sites_emailed = 0
+               l_allsites = []
+
+               sorted_sites = self.sickdb.keys()
+               sorted_sites.sort()
+               for loginbase in sorted_sites:
+                       site_record = self.sickdb[loginbase]
+                       print "sites: %s" % loginbase
+                       
+                       i_nodes_diagnosed += len(site_record.keys())
+                       i_sites_diagnosed += 1
+
+                       (na,ne) = self.__actOnSite(loginbase, site_record)
+
+                       i_sites_observed += 1
+                       i_nodes_actedon += na
+                       i_sites_emailed += ne
+
+                       l_allsites += [loginbase]
+
+               return {'sites_observed': i_sites_observed, 
+                               'sites_diagnosed': i_sites_diagnosed, 
+                               'nodes_diagnosed': i_nodes_diagnosed, 
+                               'sites_emailed': i_sites_emailed, 
+                               'nodes_actedon': i_nodes_actedon, 
+                               'allsites':l_allsites}
+
+       def print_stats(self, key, stats):
+               print "%20s : %d" % (key, stats[key])
+
+
+
+       #"""
+       #Prints, logs, and emails status of up nodes, down nodes, and buckets.
+       #"""
+       #def status(self):
+       #       sub = "Monitor Summary"
+       #       msg = "\nThe following nodes were acted upon:  \n\n"
+       #       for (node, (type, date)) in self.emailed.items():
+       #               # Print only things acted on today.
+       #               if (time.gmtime(time.time())[2] == time.gmtime(date)[2]):
+       #                       msg +="%s\t(%s)\t%s\n" %(node, type, time.ctime(date))
+       #       msg +="\n\nThe following sites have been 'squeezed':\n\n"
+       #       for (loginbase, (date, type)) in self.squeezed.items():
+       #               # Print only things acted on today.
+       #               if (time.gmtime(time.time())[2] == time.gmtime(date)[2]):
+       #                       msg +="%s\t(%s)\t%s\n" %(loginbase, type, time.ctime(date))
+       #       mailer.email(sub, msg, [SUMTO])
+       #       logger.info(msg)
+       #       return 
+
+       #"""
+       #Store/Load state of emails.  When, where, what.
+       #"""
+       #def emailedStore(self, action):
+       #       try:
+       #               if action == "LOAD":
+       #                       f = open(DAT, "r+")
+       #                       logger.info("POLICY:  Found and reading " + DAT)
+       #                       self.emailed.update(pickle.load(f))
+       #               if action == "WRITE":
+       #                       f = open(DAT, "w")
+       #                       #logger.debug("Writing " + DAT)
+       #                       pickle.dump(self.emailed, f)
+       #               f.close()
+       #       except Exception, err:
+       #               logger.info("POLICY:  Problem with DAT, %s" %err)
+
+
+#class Policy(Thread):
 
 def main():
-       logger.setLevel(logging.DEBUG)
-       ch = logging.StreamHandler()
-       ch.setLevel(logging.DEBUG)
-       formatter = logging.Formatter('%(message)s')
-       ch.setFormatter(formatter)
-       logger.addHandler(ch)
-
-       #print NodesDebug()
-       #tmp = Queue.Queue()
-       #a = Policy(None, tmp) 
-       #a.emailedStore("LOAD")
-       #print a.emailed
-
-       print plc.slices(plc.siteId("alice.cs.princeton.edu"))
-       os._exit(0)
+       print "policy.py is a module, not a script for running directly."
+
 if __name__ == '__main__':
        import os
        import plc