+# $Id$
+# $URL$
+
"""VServer slivers.
There are a couple of tricky things going on here. First, the kernel
"""
import errno
+import traceback
import os, os.path
import time
-import commands
import vserver
self.slice_id = rec['slice_id']
self.disk_usage_initialized = False
self.initscriptchanged = False
+ self.enabled = True
self.configure(rec)
- _root_context_arch=None
- @staticmethod
- def root_context_arch():
- if not Sliver_VS._root_context_arch:
- Sliver_VS._root_context_arch=commands.getoutput("uname -i")
- return Sliver_VS._root_context_arch
-
- @staticmethod
- def personality (arch):
- personality="linux32"
- if arch.find("64")>=0:
- personality="linux64"
- return personality
-
@staticmethod
def create(name, vref = None):
logger.verbose('Sliver_VS:create - name=%s'%name)
if vref is None:
+ logger.log("creating %s : no vref attached, this is unexpected"%name)
vref='default'
+ # used to look in /etc/planetlab/family, now relies on the 'family' extra attribute in GetSlivers()
+ # which for legacy is still exposed here as the 'vref' key
+
+ # check the template exists -- there's probably a better way..
+ if not os.path.isdir ("/vservers/.vref/%s"%vref):
+ # find a resonable default
+ if os.path.isfile ("/etc/planetlab/slicefamily"):
+ default=file("/etc/planetlab/slicefamily").read().strip()
+ else:
+ default='default'
+ logger.log("creating %s : /etc/planetlab/slicefamily not found, this is unexpected"%name)
+ logger.log("creating %s - vref %s not found, using default %s"%(name,vref,default))
+ vref=default
+
+ # guess arch
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 = [ 'f8', 'f9', 'centos5' ]
- # 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 os.path.isdir ("/vservers/.vref/%s"% vref): refname = vref
-
- if not os.path.isdir ("/vservers/.vref/%s"% refname):
- logger.verbose("%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.verbose("%s (%s): legacy node - using fallback vrefname 'default'"%(name,vref))
- # for legacy nodes
- refname="default"
- arch="i386"
+ (x,y,arch)=vref.split('-')
except:
- import traceback
- logger.log("%s (%s) : unexpected error follows - using 'default'"%(name,vref))
- logger.log(traceback.format_exc())
- refname="default"
- arch="i386"
+ arch='i386'
- logger.log_call('/usr/sbin/vuseradd', '-t', refname, name)
+ def personality (arch):
+ personality="linux32"
+ if arch.find("64")>=0:
+ personality="linux64"
+ return personality
+
+ logger.log_call('/usr/sbin/vuseradd', '-t', vref, name)
# export slicename to the slice in /etc/slicename
file('/vservers/%s/etc/slicename' % name, 'w').write(name)
+ file('/vservers/%s/etc/slicefamily' % name, 'w').write(vref)
# set personality: only if needed (if arch's differ)
- if Sliver_VS.root_context_arch() != arch:
- file('/etc/vservers/%s/personality' % name, 'w').write(Sliver_VS.personality(arch))
- logger.log('%s: set personality to %s'%(name,Sliver_VS.personality(arch)))
+ 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)
if self.rspec['enabled'] > 0:
logger.log('%s: starting in %d seconds' % (self.name, delay))
time.sleep(delay)
+ # VServer.start calls fork() internally,
+ # so just close the nonstandard fds and fork once to avoid creating zombies
child_pid = os.fork()
if child_pid == 0:
if self.initscriptchanged:
os.close(fd)
try:
self.chroot_call(install_initscript)
- self.initscriptchanged = False
except: logger.log_exc(self.name)
- # VServer.start calls fork() internally,
- # so just close the nonstandard fds and fork once to avoid creating zombies
tools.close_nonstandard_fds()
vserver.VServer.start(self)
os._exit(0)
- else: os.waitpid(child_pid, 0)
+ else:
+ os.waitpid(child_pid, 0)
+ self.initscriptchanged = False
else: logger.log('%s: not starting, is not enabled' % self.name)
def stop(self):
logger.log('%s: stopping' % self.name)
vserver.VServer.stop(self)
- def is_running(self): vserver.VServer.is_running(self)
+ def is_running(self):
+ return vserver.VServer.is_running(self)
- def set_resources(self):
+ def set_resources(self,setup=False):
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
cpu_pct = self.rspec['cpu_pct']
cpu_share = self.rspec['cpu_share']
+ if setup:
+ for key in self.rspec.keys():
+ if key.find('sysctl.') == 0:
+ sysctl=key.split('.')
+ try:
+ path="/proc/sys/%s" % ("/".join(sysctl[1:]))
+ logger.log("%s: opening %s"%(self.name,path))
+ flags = os.O_WRONLY
+ fd = os.open(path, flags)
+ logger.log("%s: writing %s=%s"%(self.name,key,self.rspec[key]))
+ os.write(fd,self.rspec[key])
+ os.close(fd)
+ except IOError, e:
+ logger.log("%s: could not set %s=%s"%(self.name,key,self.rspec[key]))
+ logger.log("%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))
self.set_ipaddresses_config(self.rspec['ip_addresses'])
if self.is_running():
- logger.log("%s: Setting name to %s" % (self.name, self.slice_id),2)
- self.setname(self.slice_id)
+ logger.log("%s: Storing slice id for PlanetFlow" % (self.name, self.slice_id),2)
+ #self.setname(self.slice_id)
+ file('/etc/vservers/%s/slice_id' % name, 'w').write(self.slice_id)
+
+ if self.enabled == False:
+ self.enabled = True
+ self.start()
if False: # Does not work properly yet.
if self.have_limits_changed():
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