X-Git-Url: http://git.onelab.eu/?p=mom.git;a=blobdiff_plain;f=swapmon.py;h=e2215b279ed4a54fafa66cfee407e6101693b751;hp=7ca19bc4281c02a5fc8cde9363e87301b6fcb1f0;hb=35fc6f409f7372549b7c07bddecc6dc9541160c9;hpb=be3607334dff10a4dcf1609ffa70c174007cb214 diff --git a/swapmon.py b/swapmon.py index 7ca19bc..e2215b2 100755 --- a/swapmon.py +++ b/swapmon.py @@ -22,10 +22,6 @@ import pickle 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 @@ -50,15 +46,6 @@ reset_thresh = 80 # 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 @@ -84,28 +71,6 @@ statistics are not entirely accurate due to threading. %(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 = \ @@ -145,108 +110,10 @@ and what you are doing to address the problem. %(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() - 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 """ Usage: %s [OPTIONS]... @@ -269,10 +136,10 @@ def slicestat(names = None): """ Get status of specified slices (if names is None or empty, all slices). vsize, sz, and rss are in KiB. Returns - + PID CONTEXT VSZ SZ RSS %MEM CMD {xid: {'xid': slice_id, 'name': slice_name, - 'procs': [{'pid': pid, 'xid': slice_id, 'user', username, 'cmd': command, + 'procs': [{'pid': pid, 'xid': slice_id, 'cmd': command, 'vsize': virtual_kib, 'sz': potential_kib, 'rss': physical_kib, 'pcpu': cpu_percent, 'pmem': mem_percent}] 'vsize': total_virtual_kib, @@ -283,7 +150,7 @@ def slicestat(names = None): # Mandatory fields. xid is a virtual field inserted by vps. Make # sure cmd is last so that it does not get truncated # automatically. - fields = ['pid', 'xid', 'user', 'vsize', 'sz', 'rss', 'pcpu', 'pmem', 'cmd'] + fields = ['pid', 'xid', 'vsize', 'sz', 'rss', 'pmem', 'cmd'] # vps inserts xid after pid in the output, but ps doesn't know # what the field means. @@ -295,7 +162,7 @@ def slicestat(names = None): # Eat the header line. vps depends on the header to figure out # which column is the PID column, so we can't just tell ps not to # print it. - for line in bwlimit.run("/usr/sbin/vps -e -o " + ",".join(ps_fields))[1:]: + for line in bwlimit.run("/usr/sbin/vps -e -o " + ":16,".join(ps_fields))[1:]: # Chomp newline line = line.strip() @@ -320,14 +187,16 @@ def slicestat(names = None): except ValueError: pass - # vps sometimes prints ERR instead of a context ID if it + # vps sometimes prints ERR or the name of the slice + # instead of a context ID if it # cannot identify the context of an orphaned (usually dying) # process. Skip these processes. - if type(proc['xid']) != int: + if (type(proc['xid']) != int) or (type(proc['vsize']) !=int): continue # Assign (pl_)sshd processes to slice instead of root m = re.search(r"sshd: ([a-zA-Z_]+)", proc['cmd']) + if m is not None: xid = bwlimit.get_xid(m.group(1)) if xid is not None: @@ -351,8 +220,10 @@ def slicestat(names = None): 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']] @@ -365,7 +236,7 @@ def slicestat(names = None): slice['rss'] += proc['rss'] slices[proc['xid']] = slice - + return slices def memtotal(): @@ -439,12 +310,11 @@ def formtable(slice, percent): 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" % \ + table += "%5s %10s %10s %10s %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']) @@ -508,6 +378,11 @@ def main(): 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"] @@ -563,30 +438,11 @@ def main(): # 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 verbose: print "%d%% swap consumed" % used - + if used >= reboot_thresh: # Dump slice state before rebooting writedat(slices) @@ -626,11 +482,17 @@ def main(): 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" % \