# Faiyaz Ahmed <faiyaza@cs.princeton.edu>
# Copyright (C) 2004-2006 The Trustees of Princeton University
#
-# $Id: swapmon.py,v 1.10 2006/08/16 16:18:45 faiyaza Exp $
+# $Id$
#
import syslog
reboot_thresh = 95
# Time to wait before checking slice again after reset
-reset_timeout = 15
+reset_timeout = 25
# Number of strikes before killing (strike, strike, kill)
kill_thresh = 2
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
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()
- 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(wait = False)
- 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()
+ """
+ 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()
+ 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(wait = False)
+ 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 """
slices). vsize, sz, and rss are in KiB. Returns
{xid: {'xid': slice_id,
- 'name': slice_name,
- 'procs': [{'pid': pid, 'xid': slice_id, 'user', username, 'cmd': command,
+ 'name': slice_name,
+ 'procs': [{'pid': pid, 'xid': slice_id, 'user', username, 'cmd': command,
'vsize': virtual_kib, 'sz': potential_kib, 'rss': physical_kib,
'pcpu': cpu_percent, 'pmem': mem_percent}]
- 'vsize': total_virtual_kib,
- 'sz': total_potential_kib,
- 'rss': total_physical_kib}}
+ 'vsize': total_virtual_kib,
+ 'sz': total_potential_kib,
+ 'rss': total_physical_kib}}
"""
# Mandatory fields. xid is a virtual field inserted by vps. Make
slice['procs'].append(proc)
slice['vsize'] += proc['vsize']
- slice['sz'] += proc['sz']
+ slice['sz'] += proc['sz']
slice['rss'] += proc['rss']
slices[proc['xid']] = slice
"""
Returns total physical and swap memory on the system in KiB.
"""
-
mem = 0
swap = 0
-
meminfo = open("/proc/meminfo", "r")
for line in meminfo.readlines():
- try:
- (name, value, kb) = line.split()
- except:
- continue
- if name == "MemTotal:":
- mem = int(value)
- elif name == "SwapTotal:":
- swap = int(value)
+ try:
+ (name, value, kb) = line.split()
+ except:
+ continue
+ if name == "MemTotal:":
+ mem = int(value)
+ elif name == "SwapTotal:":
+ swap = int(value)
meminfo.close()
-
return (mem, swap)
def swap_used():
"""
Returns swap utilization on the system as a whole percentage (0-100).
"""
-
total_swap = 0
total_used = 0
-
try:
swaps = open("/proc/swaps", "r")
# Eat header line
total_used += int(used)
except ValueEror, err:
pass
- except (IOError, KeyError), err:
- pass
+ except (IOError, KeyError), err: pass
- return 100 * total_used / total_swap
+ swapused = 100 * total_used / total_swap
+ if debug: print "%s percent swap used" % swapused
+ return swapused
def summary(slices = None, total_mem = None, total_swap = None):
"""
Return a summary of memory usage by slice.
"""
- if not slices:
- slices = slicestat()
+ if not slices: slices = slicestat()
slicelist = slices.values()
slicelist.sort(lambda a, b: b['sz'] - a['sz'])
if total_mem is None or total_swap is None:
- (total_mem, total_swap) = memtotal()
+ (total_mem, total_swap) = memtotal()
table = "%-20s%10s%24s%24s\n\n" % ("Slice", "Processes", "Memory Usage", "Potential Usage")
for slice in slicelist:
100. * slice['rss'] / total_mem,
format_bytes(slice['sz'] * 1024, si = False),
100. * slice['sz'] / (total_mem + total_swap))
-
-
return table
+def formtable(slice, percent):
+ '''
+ Makes pretty message to email with human readable ps values.
+ '''
+ table = "%5s %10s %10s %10s %4s %4s %s\n\n" % \
+ ("PID", "VIRT", "SZ", "RES", '%CPU', '%MEM', 'COMMAND')
+ for proc in slice['procs']:
+ table += "%5s %10s %10s %10s %4.1f %4.1f %s\n" % \
+ (proc['pid'],
+ format_bytes(proc['vsize'] * 1024, si = False),
+ format_bytes(proc['sz'] * 1024, si = False),
+ format_bytes(proc['rss'] * 1024, si = False),
+ proc['pcpu'],
+ proc['pmem'],
+ proc['cmd'])
+
+ prettytable = {'hostname': socket.gethostname(),
+ 'date': time.asctime(time.gmtime()) + " GMT",
+ 'table': table,
+ 'slice': slice['name'],
+ 'rss': format_bytes(slice['rss'] * 1024, si = False),
+ 'sz': format_bytes(slice['sz'] * 1024, si = False),
+ 'percent': percent}
+ return prettytable
+
+def readdat():
+ '''
+ Return dictionary of vps (slicestat) from datfile left behind by OOM
+ before rebooting. If none file, just grab the latest dict (slicestat)
+ and return that. If dat file found, means we rebooted, send an email to
+ pl_mom@pl.
+ '''
+ try:
+ f = open(datafile, "r+")
+ if verbose:
+ print "Loading %s" % datafile
+ (version, slices) = pickle.load(f)
+ f.close()
+ # Check version of data file
+ if version != "$Id$":
+ print "Not using old version '%s' data file %s" % (version, datafile)
+ raise Exception
+
+ params = {'hostname': socket.gethostname(),
+ 'date': time.asctime(time.gmtime()) + " GMT",
+ 'table': summary(slices, total_mem, total_swap)}
+ if debug:
+ print rebooted_subject % params
+ print rebooted_body % params
+ else:
+ slicemail(None, rebooted_subject % params, rebooted_body % params)
+
+ # Delete data file
+ os.unlink(datafile)
+ except Exception:
+ version = "$Id$"
+ slices = slicestat()
+
+ return slices
+
+
+def writedat(slices):
+ """
+ Write (slices) to pickled datfile.
+ """
+ if verbose: print "Saving %s" % datafile
+ f = open(datafile, "w")
+ pickle.dump((version, slices), f)
+ f.close()
+
+
def main():
# Defaults
global debug, verbose, datafile
# Get total memory
(total_mem, total_swap) = memtotal()
-
- try:
- f = open(datafile, "r+")
- if verbose:
- print "Loading %s" % datafile
- (version, slices) = pickle.load(f)
- f.close()
- # Check version of data file
- if version != "$Id: swapmon.py,v 1.10 2006/08/16 16:18:45 faiyaza Exp $":
- print "Not using old version '%s' data file %s" % (version, datafile)
- raise Exception
-
- params = {'hostname': socket.gethostname(),
- 'date': time.asctime(time.gmtime()) + " GMT",
- 'table': summary(slices, total_mem, total_swap)}
-
- if debug:
- print rebooted_subject % params
- print rebooted_body % params
- else:
- slicemail(None, rebooted_subject % params, rebooted_body % params)
-
- # Delete data file
- os.unlink(datafile)
- except Exception:
- version = "$Id: swapmon.py,v 1.10 2006/08/16 16:18:45 faiyaza Exp $"
- slices = {}
+ slices = readdat()
# Query process table every 30 seconds, or when a large change in
# swap utilization is detected.
while True:
used = swap_used()
-
- for resetslice in resetlist.keys():
- resetlist[resetslice].update()
-
- if last_used is None:
- last_used = used
-
- if verbose:
- print "%d%% swap consumed" % 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 verbose: print "%d%% swap consumed" % used
+
if used >= reboot_thresh:
# Dump slice state before rebooting
- if verbose:
- print "Saving %s" % datafile
- f = open(datafile, "w")
- pickle.dump((version, slices), f)
- f.close()
-
+ writedat(slices)
# Goodbye, cruel world
print "%d%% swap consumed, rebooting" % used
- if not debug:
- bwlimit.run("/bin/sync; /sbin/reboot -f")
-
+ if not debug: bwlimit.run("/bin/sync; /sbin/reboot -f")
elif used >= reset_thresh:
- if debug:
- print "Memory used = %s" %(used)
# Try and find a hog
slicelist = slices.values()
+ # Puts largest on top.
slicelist.sort(lambda a, b: b['rss'] - a['rss'])
for slice in slicelist:
percent = 100. * slice['rss'] / total_mem
-
- if slice['rss'] < rss_min:
- continue
-
+ if slice['rss'] < rss_min: continue
print "%d%% swap consumed, slice %s is using %s (%d%%) of memory" % \
- (used,
- slice['name'],
- format_bytes(slice['rss'] * 1024, si = False),
- percent)
-
+ (used,
+ slice['name'],
+ format_bytes(slice['rss'] * 1024, si = False),
+ percent)
slice['procs'].sort(lambda a, b: b['rss'] - a['rss'])
-
- table = "%5s %10s %10s %10s %4s %4s %s\n\n" % ("PID", "VIRT", "SZ", "RES", '%CPU', '%MEM', 'COMMAND')
- for proc in slice['procs']:
- table += "%5s %10s %10s %10s %4.1f %4.1f %s\n" % \
- (proc['pid'],
- format_bytes(proc['vsize'] * 1024, si = False),
- format_bytes(proc['sz'] * 1024, si = False),
- format_bytes(proc['rss'] * 1024, si = False),
- proc['pcpu'], proc['pmem'], proc['cmd'])
-
- params = {'hostname': socket.gethostname(),
- 'date': time.asctime(time.gmtime()) + " GMT",
- 'table': table,
- 'slice': slice['name'],
- 'rss': format_bytes(slice['rss'] * 1024, si = False),
- 'sz': format_bytes(slice['sz'] * 1024, si = False),
- 'percent': percent}
-
+ # Make a pretty table.
+ params = formtable(slice, percent)
# Match slice name against system slice patterns
- is_system_slice = filter(None, [re.match(pattern, slice['name']) for pattern in system_slices])
-
+ is_system_slice = filter(None,
+ [re.match(pattern, slice['name']) for pattern in system_slices])
+
+ # Do not reset system slices, just warn once
if is_system_slice:
- # Do not reset system slices, just warn once
- if slice['name'] not in warned:
- warned.append(slice['name'])
- if debug:
- print alarm_subject % params
- print alarm_body % params
- else:
- print "Warning slice " + slice['name']
- slicemail(slice['name'], alarm_subject % params,
- alarm_body % params)
+ if slice['name'] not in warned:
+ warned.append(slice['name'])
+ print "Warning slice " + slice['name']
+ if debug:
+ print alarm_subject % params
+ print alarm_body % params
+ else:
+ slicemail(slice['name'], alarm_subject % params,
+ alarm_body % params)
else:
- # Reset slice
- if not resetlist.has_key(slice['name']):
- resetlist[slice['name']] = Reset(slice['name'])
- resetlist[slice['name']].reset(params)
- slices = slicestat(names)
+ # 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 timer <= 0 or used >= (last_used + change_thresh):
if used >= (last_used + change_thresh):
print "%d%% swap consumed, %d%% in last %d seconds" % \
- (used, used - last_used, period - timer)
+ (used, used - last_used, period - timer)
# Get slice state
slices = slicestat(names)
# Reset timer
timer = period
# Keep track of large changes in swap utilization
last_used = used
-
timer -= 1
time.sleep(1)
git://git.onelab.eu / mom.git / blobdiff