"""
import errno
-import os
+import traceback
+import os, os.path
+import sys
import time
+
import vserver
import accounts
import logger
import tools
+from threading import BoundedSemaphore
+import subprocess
+
+globalsem = BoundedSemaphore()
+# special constant that tells vserver to keep its existing settings
+KEEP_LIMIT = vserver.VC_LIM_KEEP
+
+# populate the sliver/vserver specific default allocations table,
+# which is used to look for slice attributes
+DEFAULT_ALLOCATION = {}
+for rlimit in vserver.RLIMITS.keys():
+ rlim = rlimit.lower()
+ DEFAULT_ALLOCATION["%s_min"%rlim]=KEEP_LIMIT
+ DEFAULT_ALLOCATION["%s_soft"%rlim]=KEEP_LIMIT
+ DEFAULT_ALLOCATION["%s_hard"%rlim]=KEEP_LIMIT
class Sliver_VS(accounts.Account, vserver.VServer):
"""This class wraps vserver.VServer to make its interface closer to what we need."""
SHELL = '/bin/vsh'
TYPE = 'sliver.VServer'
+ _init_disk_info_sem = globalsem
def __init__(self, rec):
+ logger.verbose ('initing Sliver_VS with name=%s'%rec['name'])
try:
- vserver.VServer.__init__(self, rec['name'])
- except vserver.NoSuchVServer:
- self.create(rec['name'])
- vserver.VServer.__init__(self, rec['name'])
+ vserver.VServer.__init__(self, rec['name'],logfile='/var/log/nm')
+ except Exception, err:
+ if not isinstance(err, vserver.NoSuchVServer):
+ # Probably a bad vserver or vserver configuration file
+ logger.log_exc(self.name)
+ logger.log('%s: recreating bad vserver' % rec['name'])
+ self.destroy(rec['name'])
+ self.create(rec['name'], rec['vref'])
+ vserver.VServer.__init__(self, rec['name'],logfile='/var/log/nm')
self.keys = ''
self.rspec = {}
self.initscript = ''
+ self.slice_id = rec['slice_id']
self.disk_usage_initialized = False
+ self.initscriptchanged = False
+ self.enabled = True
self.configure(rec)
@staticmethod
def create(name, vref = None):
- if vref is not None:
- logger.log_call('/usr/sbin/vuseradd', '-t', vref, name)
- else:
- logger.log_call('/usr/sbin/vuseradd', name)
+ logger.verbose('Sliver_VS:create - name=%s'%name)
+ if vref is None:
+ vref='default'
+ try:
+ ### locating the right slicefamily
+ # this is a first draft, and more a proof of concept thing
+ # the idea is to parse vref for dash-separated wishes,
+ # and to project these against the defaults
+ # so e.g. if the default slice family (as found in /etc/planetlab/slicefamily)
+ # is planetlab-f8-i386, then here is what we get
+ # vref=x86_64 -> vuseradd -t planetlab-f8-x86_64
+ # vref=centos5 -> vuseradd -t planetlab-centos5-i386
+ # vref=centos5-onelab -> vuseradd -t onelab-centos5-i386
+ # vref=planetflow -> vuseradd -t planetflow-f8-i386
+ # vref=x86_64-planetflow -> vuseradd -t planetflow-f8-x86_64
+
+ # default
+ default=file("/etc/planetlab/slicefamily").read().strip()
+ (pldistro,fcdistro,arch) = default.split("-")
+
+ known_archs = [ 'i386', 'x86_64' ]
+ known_fcdistros = [ 'centos5', 'f8', 'f9', 'f10', 'f11', 'f12' ]
+ # from the slice attribute: cut dashes and try to figure the meaning
+ slice_wishes = vref.split("-")
+ for wish in slice_wishes:
+ if wish in known_archs:
+ arch=wish
+ elif wish in known_fcdistros:
+ fcdistro=wish
+ else:
+ pldistro=wish
+
+ # rejoin the parts
+ refname="-".join( (pldistro,fcdistro,arch) )
+
+ # check the template exists -- there's probably a better way..
+ if not os.path.isdir ("/vservers/.vref/%s"%refname):
+ logger.log("%s (%s) : vref %s not found, using default %s"%(
+ name,vref,refname,default))
+ refname=default
+ # reset so arch is right
+ (pldistro,fcdistro,arch) = default.split("-")
+ # could check again, but as we have /etc/slicefamily
+ # there's probably no /vservers/.vref/default
+
+ except IOError:
+ # have not found slicefamily
+ logger.log("%s (%s): legacy node - using fallback vrefname 'default'"%(name,vref))
+ # for legacy nodes
+ refname="default"
+ arch="i386"
+ except:
+ logger.log("%s (%s) : unexpected error follows - using 'default'"%(name,vref))
+ logger.log(traceback.format_exc())
+ refname="default"
+ arch="i386"
+
+ def personality (arch):
+ personality="linux32"
+ if arch.find("64")>=0:
+ personality="linux64"
+ return personality
+
+ logger.log_call('/usr/sbin/vuseradd', '-t', refname, name)
+ # export slicename to the slice in /etc/slicename
+ file('/vservers/%s/etc/slicename' % name, 'w').write(name)
+ # set personality: only if needed (if arch's differ)
+ if tools.root_context_arch() != arch:
+ file('/etc/vservers/%s/personality' % name, 'w').write(personality(arch))
+ logger.log('%s: set personality to %s'%(name,personality(arch)))
@staticmethod
def destroy(name): logger.log_call('/usr/sbin/vuserdel', name)
def configure(self, rec):
+ # in case we update nodemanager..
+ self.install_and_enable_vinit()
+
new_rspec = rec['_rspec']
if new_rspec != self.rspec:
self.rspec = new_rspec
new_initscript = rec['initscript']
if new_initscript != self.initscript:
self.initscript = new_initscript
- logger.log('%s: installing initscript' % self.name)
- def install_initscript():
- flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
- fd = os.open('/etc/rc.vinit', flags, 0755)
- os.write(fd, new_initscript)
- os.close(fd)
- try: self.chroot_call(install_initscript)
- except: logger.log_exc()
+ # not used anymore, we always check against the installed script
+ #self.initscriptchanged = True
+ self.refresh_slice_vinit()
accounts.Account.configure(self, rec) # install ssh keys
+ # unconditionnally install and enable the generic vinit script
+ # mimicking chkconfig for enabling the generic vinit script
+ # this is hardwired for runlevel 3
+ def install_and_enable_vinit (self):
+ vinit_source="/usr/share/NodeManager/sliver-initscripts/vinit"
+ vinit_script="/vservers/%s/etc/rc.d/init.d/vinit"%self.name
+ rc3_link="/vservers/%s/etc/rc.d/rc3.d/S99vinit"%self.name
+ rc3_target="../init.d/vinit"
+ # install in sliver
+ body=file(vinit_source).read()
+ if tools.replace_file_with_string(vinit_script,body,chmod=0755):
+ logger.log("vsliver_vs: %s: installed generic vinit rc script"%self.name)
+ # create symlink for runlevel 3
+ if not os.path.islink(rc3_link):
+ try:
+ logger.log("vsliver_vs: %s: creating runlevel3 symlink %s"%(self.name,rc3_link))
+ os.symlink(rc3_target,rc3_link)
+ except:
+ logger.log_exc("vsliver_vs: %s: failed to create runlevel3 symlink %s"%rc3_link)
+
+ def rerun_slice_vinit(self):
+ command = "/usr/sbin/vserver %s exec /etc/rc.d/init.d/vinit restart" % (self.name)
+ logger.log("vsliver_vs: %s: Rerunning slice initscript: %s" % (self.name, command))
+ subprocess.call(command + "&", stdin=open('/dev/null', 'r'), stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT, shell=True)
+
+ # this one checks for the existence of the slice initscript
+ # install or remove the slice inistscript, as instructed by the initscript tag
+ def refresh_slice_vinit(self):
+ body=self.initscript
+ sliver_initscript="/vservers/%s/etc/rc.d/init.d/vinit.slice"%self.name
+ if tools.replace_file_with_string(sliver_initscript,body,remove_if_empty=True,chmod=0755):
+ if body:
+ logger.log("vsliver_vs: %s: Installed new initscript in %s"%(self.name,sliver_initscript))
+ if self.is_running():
+ # Only need to rerun the initscript if the vserver is
+ # already running. If the vserver isn't running, then the
+ # initscript will automatically be started by
+ # /etc/rc.d/vinit when the vserver is started.
+ self.rerun_slice_vinit()
+ else:
+ logger.log("vsliver_vs: %s: Removed obsolete initscript %s"%(self.name,sliver_initscript))
+
def start(self, delay=0):
- if self.rspec['enabled']:
- logger.log('%s: starting in %d seconds' % (self.name, delay))
+ if self.rspec['enabled'] <= 0:
+ logger.log('sliver_vs: not starting %s, is not enabled'%self.name)
+ else:
+ logger.log('sliver_vs: %s: starting in %d seconds' % (self.name, delay))
+ time.sleep(delay)
+ # the generic /etc/init.d/vinit script is permanently refreshed, and enabled
+ self.install_and_enable_vinit()
+ # if a change has occured in the slice initscript, reflect this in /etc/init.d/vinit.slice
+ self.refresh_slice_vinit()
child_pid = os.fork()
if child_pid == 0:
- # VServer.start calls fork() internally, so just close the nonstandard fds and fork once to avoid creating zombies
+ # VServer.start calls fork() internally,
+ # so just close the nonstandard fds and fork once to avoid creating zombies
tools.close_nonstandard_fds()
- time.sleep(delay)
- vserver.VServer.start(self, True)
+ vserver.VServer.start(self)
os._exit(0)
- else: os.waitpid(child_pid, 0)
- else: logger.log('%s: not starting, is not enabled' % self.name)
+ else:
+ os.waitpid(child_pid, 0)
def stop(self):
logger.log('%s: stopping' % self.name)
vserver.VServer.stop(self)
+ def is_running(self):
+ return vserver.VServer.is_running(self)
+
def set_resources(self):
disk_max = self.rspec['disk_max']
logger.log('%s: setting max disk usage to %d KiB' % (self.name, disk_max))
try: # if the sliver is over quota, .set_disk_limit will throw an exception
if not self.disk_usage_initialized:
self.vm_running = False
- logger.log('%s: computing disk usage' % self.name)
- self.init_disk_info()
+ Sliver_VS._init_disk_info_sem.acquire()
+ logger.log('%s: computing disk usage: beginning' % self.name)
+ try: self.init_disk_info()
+ finally: Sliver_VS._init_disk_info_sem.release()
+ logger.log('%s: computing disk usage: ended' % self.name)
self.disk_usage_initialized = True
- vserver.VServer.set_disklimit(self, disk_max)
- except OSError:
+ vserver.VServer.set_disklimit(self, max(disk_max, self.disk_blocks))
+ except:
logger.log('%s: failed to set max disk usage' % self.name)
- logger.log_exc()
+ logger.log_exc(self.name)
- net_limits = (self.rspec['net_min'], self.rspec['net_max'], self.rspec['net2_min'], self.rspec['net2_max'], self.rspec['net_share'])
- logger.log('%s: setting net limits to %s bps' % (self.name, net_limits[:-1]))
- logger.log('%s: setting net share to %d' % (self.name, net_limits[-1]))
- self.set_bwlimit(*net_limits)
+ # get/set the min/soft/hard values for all of the vserver
+ # related RLIMITS. Note that vserver currently only
+ # implements support for hard limits.
+ for limit in vserver.RLIMITS.keys():
+ type = limit.lower()
+ minimum = self.rspec['%s_min'%type]
+ soft = self.rspec['%s_soft'%type]
+ hard = self.rspec['%s_hard'%type]
+ update = self.set_rlimit(limit, hard, soft, minimum)
+ if update:
+ logger.log('%s: setting rlimit %s to (%d, %d, %d)'
+ % (self.name, type, hard, soft, minimum))
- cpu_min = self.rspec['cpu_min']
+ self.set_capabilities_config(self.rspec['capabilities'])
+ if self.rspec['capabilities']:
+ logger.log('%s: setting capabilities to %s' % (self.name, self.rspec['capabilities']))
+
+ cpu_pct = self.rspec['cpu_pct']
cpu_share = self.rspec['cpu_share']
- if self.rspec['enabled']:
- if cpu_min >= 50: # at least 5%: keep people from shooting themselves in the foot
- logger.log('%s: setting cpu share to %d%% guaranteed' % (self.name, cpu_min/10.0))
- self.set_sched_config(cpu_min, vserver.SCHED_CPU_GUARANTEED)
+
+ count = 1
+ for key in self.rspec.keys():
+ if key.find('sysctl.') == 0:
+ sysctl=key.split('.')
+ try:
+ # /etc/vservers/<guest>/sysctl/<id>/
+ dirname = "/etc/vservers/%s/sysctl/%s" % (self.name, count)
+ try:
+ os.makedirs(dirname, 0755)
+ except:
+ pass
+ setting = open("%s/setting" % dirname, "w")
+ setting.write("%s\n" % key.lstrip("sysctl."))
+ setting.close()
+ value = open("%s/value" % dirname, "w")
+ value.write("%s\n" % self.rspec[key])
+ value.close()
+ count += 1
+
+ logger.log("sliver_vs: %s: writing %s=%s"%(self.name,key,self.rspec[key]))
+ except IOError, e:
+ logger.log("sliver_vs: %s: could not set %s=%s"%(self.name,key,self.rspec[key]))
+ logger.log("sliver_vs: %s: error = %s"%(self.name,e))
+
+
+ if self.rspec['enabled'] > 0:
+ if cpu_pct > 0:
+ logger.log('%s: setting cpu reservation to %d%%' % (self.name, cpu_pct))
else:
+ cpu_pct = 0
+
+ if cpu_share > 0:
logger.log('%s: setting cpu share to %d' % (self.name, cpu_share))
- self.set_sched_config(cpu_share, 0)
+ else:
+ cpu_share = 0
+
+ self.set_sched_config(cpu_pct, cpu_share)
+ # if IP address isn't set (even to 0.0.0.0), sliver won't be able to use network
+ if self.rspec['ip_addresses'] != '0.0.0.0':
+ logger.log('%s: setting IP address(es) to %s' % \
+ (self.name, self.rspec['ip_addresses']))
+ self.set_ipaddresses_config(self.rspec['ip_addresses'])
+
+ try:
+ vserver_config_path = '/etc/vservers/%s'%self.name
+ if not os.path.exists (vserver_config_path):
+ os.makedirs (vserver_config_path)
+ file('%s/slice_id'%vserver_config_path, 'w').write("%d"%self.slice_id)
+ logger.log("sliver_vs: Recorded slice id %d for slice %s"%(self.slice_id,self.name))
+ except IOError,e:
+ logger.log("sliver_vs: Could not record slice_id for slice %s. Error: %s"%(self.name,str(e)))
+ except Exception,e:
+ logger.log_exc("sliver_vs: Error recording slice id: %s"%str(e),name=self.name)
+
+ if self.enabled == False:
+ self.enabled = True
+ self.start()
+
+ if False: # Does not work properly yet.
+ if self.have_limits_changed():
+ logger.log('%s: limits have changed --- restarting' % self.name)
+ stopcount = 10
+ while self.is_running() and stopcount > 0:
+ self.stop()
+ delay = 1
+ time.sleep(delay)
+ stopcount = stopcount - 1
+ self.start()
+
else: # tell vsh to disable remote login by setting CPULIMIT to 0
logger.log('%s: disabling remote login' % self.name)
self.set_sched_config(0, 0)
+ self.enabled = False
self.stop()
git://git.onelab.eu / nodemanager.git / blobdiff