+ def __update_config_file(self, filename, newvars):
+
+ # read old file, apply changes
+ f = open(filename, "r")
+ data = f.read()
+ f.close()
+ todo = newvars.copy()
+ changed = False
+ for m in self.config_var_re.finditer(data):
+ (key, val) = m.groups()
+ newval = todo.pop(key, None)
+ if newval != None:
+ data = data[:m.start(2)] + str(newval) + data[m.end(2):]
+ changed = True
+ for (newkey, newval) in todo.items():
+ data += "%s=%s\n" % (newkey, newval)
+ changed = True
+
+ if not changed:
+ return
+
+ # write new file
+ newfile = filename + ".new"
+ f = open(newfile, "w")
+ f.write(data)
+ f.close()
+
+ # 'copy' original file, rename new to original
+ backup = filename + ".old"
+ try:
+ os.unlink(backup)
+ except OSError, ex:
+ if ex.errno != errno.ENOENT:
+ raise
+ os.link(filename, backup)
+ os.rename(newfile, filename)
+
+ def __do_chroot(self):
+
+ os.chroot(self.dir)
+ os.chdir("/")
+
+ def set_disklimit(self, block_limit):
+
+ # block_limit is in kB, get_disk_usage() must have been called
+ if self.disk_usage_set:
+ block_usage = vserverimpl.DLIMIT_KEEP
+ inode_usage = vserverimpl.DLIMIT_KEEP
+ else:
+ block_usage = self.disk_blocks
+ inode_usage = self.disk_inodes
+ if block_limit < block_usage:
+ raise Exception, ("%s disk usage (%u blocks) > limit (%u)" %
+ (self.name, block_usage, block_limit))
+ self.disk_usage_set = True
+
+ vserverimpl.setdlimit(self.dir,
+ self.ctx,
+ block_usage,
+ block_limit,
+ inode_usage,
+ vserverimpl.DLIMIT_INF, # inode limit
+ 2) # %age reserved for root
+
+ def get_disklimit(self):
+
+ try:
+ blocksused, blocktotal, inodesused, inodestotal, reserved = \
+ vserverimpl.getdlimit(self.dir, self.ctx)
+ except OSError, ex:
+ if ex.errno == errno.ESRCH:
+ # get here if no vserver disk limit has been set for xid
+ # set blockused to -1 to indicate no limit
+ blocktotal = -1
+
+ return blocktotal
+
+ def set_sched(self, shares = 32, besteffort = True):
+ # for the old CKRM scheduler
+ if cpulimit.checkckrm() is True:
+ cpulimit.cpuinit()
+ cpulimit.vs2ckrm_on(self.name)
+ try:
+ cpulimit.cpulimit(self.name,shares)
+ except OSError, ex:
+ if ex.errno == 22:
+ print "invalid shares argument"
+ # should re-raise exception?!
+
+ # for the new vserver scheduler
+ else:
+ global SCHED_TOKENS_MIN, SCHED_TOKENS_MAX, SCHED_TOKENS, SCHED_INTERVAL
+ tokensmin = SCHED_TOKENS_MIN
+ tokensmax = SCHED_TOKENS_MAX
+ tokens = SCHED_TOKENS
+ interval = SCHED_INTERVAL
+ fillrate = shares
+
+ if besteffort is True:
+ cpuguaranteed = 0
+ else:
+ cpuguaranteed = 1
+
+ try:
+ vserverimpl.setsched(self.ctx,fillrate,interval,tokens,tokensmin,tokensmax,cpuguaranteed)
+ except OSError, ex:
+ if ex.errno == 22:
+ print "kernel does not support vserver scheduler"
+ else:
+ raise ex
+
+ def get_sched(self):
+ # have no way of querying scheduler right now on a per vserver basis
+ return (-1, False)
+
+ def set_memlimit(self, limit):
+ ret = vserverimpl.setrlimit(self.ctx,5,limit)
+ return ret
+
+ def get_memlimit(self):
+ ret = vserverimpl.getrlimit(self.ctx,5)
+ return ret
+
+ def set_tasklimit(self, limit):
+ ret = vserverimpl.setrlimit(self.ctx,6,limit)
+ return ret
+
+ def get_tasklimit(self):
+ ret = vserverimpl.getrlimit(self.ctx,6)
+ return ret
+
+ def set_bwlimit(self, eth, limit, cap, minrate, maxrate):
+ if cap == "-1":
+ bwlimit.off(self.ctx,eth)
+ else:
+ bwlimit.on(self.ctx, eth, limit, cap, minrate, maxrate)
+
+ def get_bwlimit(self, eth):
+ # not implemented yet
+ bwlimit = -1
+ cap = "unknown"
+ minrate = "unknown"
+ maxrate = "unknown"
+ return (bwlimit, cap, minrate, maxrate)
+
+ def open(self, filename, mode = "r", bufsize = -1):