import socket
import time
-# util-vserver/python/vserver.py allows us to control slices directly
-# from Python
-from vserver import VServer
-
# bwlimit exports a few useful functions like run(), get_xid(), and get_slice()
import bwlimit
# Swap utilization at which the machine is rebooted
reboot_thresh = 95
-# Time to wait before checking slice again after reset
-reset_timeout = 25
-
-# Number of strikes before killing (strike, strike, kill)
-kill_thresh = 2
-
-# Time to wait before removing slice from kill queue (probation)
-kill_timeout = 120
-
# Don't email the same message more than once in the same emailtimeout interval
email_timeout = 1800
%(date)s %(hostname)s reboot
""".lstrip()
-# Message sent after a hog is reset
-reset_subject = "pl_mom reset slice %(slice)s on %(hostname)s"
-reset_body = \
-"""
-Sometime before %(date)s, swap space was
-nearly exhausted on %(hostname)s.
-
-Slice %(slice)s was reset since it was the largest consumer of
-physical memory at %(rss)s (%(percent)4.1f%%) (%(sz)s writable).
-
-Please reply to this message explaining the nature of your experiment,
-and what you are doing to address the problem.
-
-http://summer.cs.princeton.edu/status/tabulator.cgi?table=slices/table_%(slice)s
-
-%(slice)s processes prior to reset:
-
-%(table)s
-
-%(date)s %(hostname)s reset %(slice)s
-""".lstrip()
-
# Message sent to system slices that should not be reset
alarm_subject = "pl_mom alarm slice %(slice)s on %(hostname)s"
alarm_body = \
%(date)s %(hostname)s reset %(slice)s
""".lstrip()
+def killsliverprocs(xid):
+ bwlimit.run("/usr/sbin/vkill -s 9 -c %s 0" % xid)
-class Reset:
- """
- Keeps track of state information for resets and kills
-
- resettimeleft - timeout before checking for next reset
- resetcount - number of strikes
- killtimeleft - time out before removing from kill queue
- {kill,reset}mail - Time of last email
- kill - State of kill. If slice is already being killed, wait before retry.
- """
-
- def __init__(self,name):
- self.name = name
- self.resettimeleft = reset_timeout
- self.resetcount = 0
- self.resetmail = 0
- self.killtimeleft = kill_timeout
- self.killmail = 0
-
- def __repr__(self):
- return self.name
-
- def update(self):
- # Count down for next check of reset slice.
- if self.resettimeleft > 0:
- self.resettimeleft -= 1
- if debug and verbose: print "%s has %s seconds in probation" \
- %(self.name, self.killtimeleft)
- if self.killtimeleft > 0:
- # Count down kill probation timer (killtimeleft)
- self.killtimeleft -= 1
- if self.killtimeleft == 1:
- print "%s is out of probation" % self.name
- else:
- # Once out of probation period (killtimeleft), remove strikes
- self.resetcount = 0
-
-
- # Check to see if a slice needs to be killed. If it has been killed more
- # than kill_thresh in the probation period (kill_timeout) send an email, kill the slice.
- def checkkill(self,params):
- if self.killtimeleft > 0 and self.resetcount >= kill_thresh:
- if debug:
- print kill_subject % params
- print kill_body % params
- try:
- pid = os.fork()
- if pid == 0:
- print "Slice %s is being killed." % self.name
- vserver = VServer(self.name)
- vserver.stop()
- # ignore initscripts. Don't run anything at start.
- vserver.INITSCRIPTS = []
- vserver.start()
- os._exit(0)
- else:
- os.waitpid(pid,0)
- except Exception, err:
- print "Warning: Exception received while killing slice %s: %s" \
- % (self.name, err)
- if (time.time() - self.killmail) > email_timeout:
- slicemail(self.name, kill_subject % params, kill_body % params)
- print "Sending KILL email for slice %s" % self.name
- self.killmail = time.time()
- return True
- return False
-
- # Reset slice after checking to see if slice is out of timeout.
- # Increment resetcount, check to see if larger than kill_thresh.
- def reset(self, params):
- # If its the first reset (came back after kill)
- # or if its been reset before
- # and we are out of the reset timeout.
- if self.resetcount == 0 or self.resettimeleft == 0:
- # Do we need to kill this slice? Check history first.
- if self.checkkill(params): return
- # Update counters
- self.resetcount += 1
- self.killtimeleft = kill_timeout
- self.resettimeleft = reset_timeout
- print "%s has %s seconds to die and has been reset %s times" \
- %(self.name, self.resettimeleft, self.resetcount)
- if debug:
- print reset_subject % params
- print reset_body % params
- try:
- pid = os.fork()
- if pid == 0:
- print "Resetting slice " + self.name
- vserver = VServer(self.name)
- vserver.stop()
- vserver.start()
- os._exit(0)
- else:
- os.waitpid(pid,0)
- except Exception, err:
- print "Warning: Exception received while resetting slice %s:" \
- % self.name, err
- if (time.time() - self.resetmail) > email_timeout:
- slicemail(self.name, reset_subject % params, reset_body % params)
- print "Sending Reset email for slice %s" % self.name
- self.resetmail = time.time()
-
def usage():
print """
Usage: %s [OPTIONS]...
proc['rss'] += 12
# Include additional page table overhead
- if proc['vsize'] > 4096:
- proc['rss'] += 4 * ((proc['vsize'] - 1) / 4096)
+ try:
+ if proc['vsize'] > 4096:
+ proc['rss'] += 4 * ((proc['vsize'] - 1) / 4096)
+ except: pass
if slices.has_key(proc['xid']):
slice = slices[proc['xid']]
global period, change_thresh, reset_thresh, reboot_thresh, rss_min, system_slices
# All slices
names = []
+ timer = period
+ last_used = None
+ used = None
+ warned = []
+ emailed = {}
try:
longopts = ["debug", "verbose", "file=", "slice=", "status", "help"]
# Query process table every 30 seconds, or when a large change in
# swap utilization is detected.
- timer = period
- last_used = None
- used = None
-
- # System slices that we have warned but could not reset
- warned = []
-
- # Slices that were reset
- resetlist = {}
while True:
used = swap_used()
if last_used is None: last_used = used
-
- # If we've reset you recently, update timers.
- for resetslice in resetlist.keys():
- resetlist[resetslice].update()
- # If you've been good, remove you from our list.
- if resetlist[resetslice].killtimeleft == 0 and \
- resetlist[resetslice].resettimeleft == 0:
- del resetlist[resetslice]
-
+
if used >= reboot_thresh:
# Dump slice state before rebooting
writedat(slices)
alarm_body % params)
else:
# Reset slice
- if not resetlist.has_key(slice['name']):
- resetlist[slice['name']] = Reset(slice['name'])
- resetlist[slice['name']].reset(params)
-
- # wait period vefore recalculating swap. If in danger, recalc.
+ if not debug:
+ if emailed.get(slice['name'], (time.time() + email_timeout + 1)) > (time.time() + email_timeout):
+ slicemail(slice['name'], kill_subject % params, kill_body % params)
+ emailed[slice['name']] = time.time()
+ else:
+ print kill_subject % params
+ print kill_body % params
+ print "Killing procs in %s" % slice['name']
+ killsliverprocs(slice['xid'])
+
+ # wait period before recalculating swap. If in danger, recalc.
if timer <= 0 or used >= (last_used + change_thresh):
if used >= (last_used + change_thresh):
print "%d%% swap consumed, %d%% in last %d seconds" % \
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