FLAGS_ULIMIT = 64
FLAGS_NAMESPACE = 128
+RLIMITS = {"CPU": RLIMIT_CPU,
+ "RSS": RLIMIT_RSS,
+ "NPROC": RLIMIT_NPROC,
+ "NOFILE": RLIMIT_NOFILE,
+ "MEMLOCK": RLIMIT_MEMLOCK,
+ "AS": RLIMIT_AS,
+ "LOCKS": RLIMIT_LOCKS,
+ "SIGPENDING": RLIMIT_SIGPENDING,
+ "MSGQUEUE": RLIMIT_MSGQUEUE,
+ "NSOCK": VLIMIT_NSOCK,
+ "OPENFD": VLIMIT_OPENFD,
+ "ANON": VLIMIT_ANON,
+ "SHMEM": VLIMIT_SHMEM}
class NoSuchVServer(Exception): pass
def __init__(self, name, vm_id = None, vm_running = False):
self.name = name
- self.limits_changed = False
+ self.rlimits_changed = False
self.config_file = "/etc/vservers/%s.conf" % name
self.dir = "%s/%s" % (vserverimpl.VSERVER_BASEDIR, name)
if not (os.path.isdir(self.dir) and
self.ctx = vm_id
self.vm_running = vm_running
- # For every resource key listed in the limit table, add in a
- # new method with which one can get/set the resource's hard,
- # soft, minimum limits.
- limits = {"CPU": RLIMIT_CPU,
- "RSS": RLIMIT_RSS,
- "NPROC": RLIMIT_NPROC,
- "NOFILE": RLIMIT_NOFILE,
- "MEMLOCK": RLIMIT_MEMLOCK,
- "AS": RLIMIT_AS,
- "LOCKS": RLIMIT_LOCKS,
- "SIGPENDING": RLIMIT_SIGPENDING,
- "MSGQUEUE": RLIMIT_MSGQUEUE,
- "NSOCK": VLIMIT_NSOCK,
- "OPENFD": VLIMIT_OPENFD,
- "ANON": VLIMIT_ANON,
- "SHMEM": VLIMIT_SHMEM}
- for meth in limits.keys():
- resource_type = limits[meth]
- func = lambda \
- hard=VC_LIM_KEEP,\
- soft=VC_LIM_KEEP,\
- minimum=VC_LIM_KEEP:\
- self.__set_vserver_limit(resource_type,\
- hard, \
- soft,\
- minimum)
- self.__dict__["set_%s_limit"%meth] = func
-
- func = lambda \
- hard=VC_LIM_KEEP,\
- soft=VC_LIM_KEEP,\
- minimum=VC_LIM_KEEP:\
- self.__set_vserver_config(meth, resource_type, \
- hard, \
- soft,\
- minimum)
- self.__dict__["set_%s_config"%meth] = func
-
- func = lambda : self.__get_vserver_limit(resource_type)
- self.__dict__["get_%s_limit"%meth] = func
-
- func = lambda : self.__get_vserver_config(meth,resource_type)
- self.__dict__["get_%s_config"%meth] = func
-
def have_limits_changed(self):
- return self.limits_changed
+ return self.rlimits_changed
- def __set_vserver_limit(self,resource_type,hard,soft,minimum):
+ def set_rlimit_limit(self,type,hard,soft,minimum):
"""Generic set resource limit function for vserver"""
- if self.is_running():
- changed = False
- old_hard, old_soft, old_minimum = self.__get_vserver_limit(resource_type)
+ global RLIMITS
+ changed = False
+ try:
+ old_hard, old_soft, old_minimum = self.get_rlimit_limit(type)
if old_hard != VC_LIM_KEEP and old_hard <> hard: changed = True
if old_soft != VC_LIM_KEEP and old_soft <> soft: changed = True
if old_minimum != VC_LIM_KEEP and old_minimum <> minimum: changed = True
- self.limits_changed = self.limits_changed or changed
+ self.rlimits_changed = self.rlimits_changed or changed
+ except OSError, e:
+ if self.is_running(): print "Unexpected error with getrlimit for running context %d" % self.ctx
+
+ resource_type = RLIMITS[type]
+ try:
ret = vserverimpl.setrlimit(self.ctx,resource_type,hard,soft,minimum)
+ except OSError, e:
+ if self.is_running(): print "Unexpected error with setrlimit for running context %d" % self.ctx
- def __set_vserver_config(self,meth,resource_type,hard,soft,minimum):
+ def set_rlimit_config(self,type,hard,soft,minimum):
"""Generic set resource limit function for vserver"""
resources = {}
if hard <> VC_LIM_KEEP:
- resources["VS_%s_HARD"%meth] = hard
+ resources["VS_%s_HARD"%type] = hard
if soft <> VC_LIM_KEEP:
- resources["VS_%s_SOFT"%meth] = soft
+ resources["VS_%s_SOFT"%type] = soft
if minimum <> VC_LIM_KEEP:
- resources["VS_%s_MINIMUM"%meth] = minimum
+ resources["VS_%s_MINIMUM"%type] = minimum
if len(resources)>0:
self.update_resources(resources)
- self.__set_vserver_limit(resource_type,hard,soft,minimum)
+ self.set_rlimit_limit(type,hard,soft,minimum)
- def __get_vserver_limit(self,resource_type):
+ def get_rlimit_limit(self,type):
"""Generic get resource configuration function for vserver"""
- if self.is_running():
+ global RLIMITS
+ resource_type = RLIMITS[type]
+ try:
ret = vserverimpl.getrlimit(self.ctx,resource_type)
- else:
- ret = __get_vserver_config(meth,resource_type)
+ except OSError, e:
+ print "Unexpected error with getrlimit for context %d" % self.ctx
+ ret = self.get_rlimit_config(type)
return ret
- def __get_vserver_config(self,meth,resource_type):
+ def get_rlimit_config(self,type):
"""Generic get resource configuration function for vserver"""
- hard = int(self.config.get("VS_%s_HARD"%meth,VC_LIM_KEEP))
- soft = int(self.config.get("VS_%s_SOFT"%meth,VC_LIM_KEEP))
- minimum = int(self.config.get("VS_%s_MINIMUM"%meth,VC_LIM_KEEP))
+ hard = int(self.config.get("VS_%s_HARD"%type,VC_LIM_KEEP))
+ soft = int(self.config.get("VS_%s_SOFT"%type,VC_LIM_KEEP))
+ minimum = int(self.config.get("VS_%s_MINIMUM"%type,VC_LIM_KEEP))
return (hard,soft,minimum)
def set_WHITELISTED_config(self,whitelisted):
def set_disklimit(self, block_limit):
# block_limit is in kB
if block_limit == 0:
- vserverimpl.unsetdlimit(self.dir, self.ctx)
+ try:
+ vserverimpl.unsetdlimit(self.dir, self.ctx)
+ except OSError, e:
+ print "Unexpected error with unsetdlimit for context %d" % self.ctx
return
if self.vm_running:
block_usage = self.disk_blocks
inode_usage = self.disk_inodes
- vserverimpl.setdlimit(self.dir,
- self.ctx,
- block_usage,
- block_limit,
- inode_usage,
- vserverimpl.DLIMIT_INF, # inode limit
- 2) # %age reserved for root
+
+ try:
+ vserverimpl.setdlimit(self.dir,
+ self.ctx,
+ block_usage,
+ block_limit,
+ inode_usage,
+ vserverimpl.DLIMIT_INF, # inode limit
+ 2) # %age reserved for root
+ except OSError, e:
+ print "Unexpected error with setdlimit for context %d" % self.ctx
+
resources = {'VS_DISK_MAX': block_limit}
self.update_resources(resources)
def start(self, wait, runlevel = 3):
self.vm_running = True
- self.limits_changed = False
+ self.rlimits_changed = False
child_pid = os.fork()
if child_pid == 0:
def stop(self, signal = signal.SIGKILL):
vserverimpl.killall(self.ctx, signal)
self.vm_running = False
- self.limits_changed = False
+ self.rlimits_changed = False