+#
+
"""VServer slivers.
There are a couple of tricky things going on here. First, the kernel
"""
import errno
+import traceback
import os, os.path
+import sys
import time
+from threading import BoundedSemaphore
+import subprocess
+
+# the util-vserver-pl module
import vserver
import accounts
SHELL = '/bin/vsh'
TYPE = 'sliver.VServer'
- _init_disk_info_sem = tools.NMLock("/var/run/nm-disk-info.lock")
+ _init_disk_info_sem = BoundedSemaphore()
def __init__(self, rec):
- logger.verbose ('initing Sliver_VS with name=%s'%rec['name'])
+ name=rec['name']
+ logger.verbose ('sliver_vs: %s init'%name)
try:
- vserver.VServer.__init__(self, rec['name'],logfile='/var/log/nm')
+ logger.log("sliver_vs: %s: first chance..."%name)
+ vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager')
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')
+ logger.log_exc("sliver_vs:__init__ (first chance) %s",name=name)
+ logger.log('sliver_vs: %s: recreating bad vserver' % name)
+ self.destroy(name)
+ self.create(name, rec)
+ logger.log("sliver_vs: %s: second chance..."%name)
+ vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager')
self.keys = ''
self.rspec = {}
- self.initscript = ''
+ self.slice_id = rec['slice_id']
self.disk_usage_initialized = False
- self.initscriptchanged = False
+ self.initscript = ''
+ self.enabled = True
self.configure(rec)
@staticmethod
- def create(name, vref = None):
- logger.verbose('Sliver_VS:create - name=%s'%name)
+ def create(name, rec = None):
+ logger.verbose('sliver_vs: %s: create'%name)
+ vref = rec['vref']
if vref is None:
- vref='default'
+ logger.log("sliver_vs: %s: ERROR - no vref attached, this is unexpected"%(name))
+ # added by caglar
+ # band-aid for short period as old API doesn't have GetSliceFamily function
+ #return
+ vref = "planetlab-f8-i386"
+
+ # used to look in /etc/planetlab/family,
+ # now relies on the 'GetSliceFamily' 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):
+ logger.log ("sliver_vs: %s: ERROR Could not create sliver - vreference image %s not found"%(name,vref))
+ return
+
+ # 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
- # however for cases like when vref is 'planetflow', if we do not understand
- # any of the wishes we take vref as is
- # this could be improved by having the vserver-reference init script be a bit smarter
- # so we could take planetflow as the pldistro part here
- as_is=None
- # defaults
- default=file("/etc/planetlab/defaultvref").read()
- (pldistro,fcdistro,arch) = default.split("-")
- # from the slice attribute: cut dashes and try to figure the meaning
- slice_wishes = vref.split("-")
- for wish in slice_wishes:
- if wish == "i386" or wish == "x86_64":
- arch=wish
- elif wish == "planetlab" or wish == "onelab" or wish == "vini":
- pldistro=wish
- elif wish == "f8" or wish == "centos5" :
- fcdistro=wish
- else:
- # if we find something like e.g. planetflow, use it as-is
- as_is=vref
- break
- if as_is:
- refname=as_is
- else:
- refname="-".join( (pldistro,fcdistro,arch) )
- # check the templates exists -- there's probably a better way..
- if not os.path.isdir ("/vservers/.vref/%s"%refname):
- log.verbose("%s (%s) : vref %s not found, using default %s"%(
- name,vref,refname,default))
- refname=default
- except IOError:
- # have not found defaultvref
- logger.verbose("%s (%s): using fallback vrefname 'default'"%(name,vref))
- # for legacy nodes
- refname="default"
- except:
- import traceback
- logger.log("%s (%s) : unexpected error follows - using 'default'"%(
- name,vref))
- logger.log(traceback.format_exc())
-
- logger.log_call('/usr/sbin/vuseradd', '-t', refname, name)
- open('/vservers/%s/etc/slicename' % name, 'w').write(name)
+ (x,y,arch)=vref.split('-')
+ # mh, this of course applies when 'vref' is e.g. 'netflow'
+ # and that's not quite right
+ except:
+ arch='i386'
+
+ def personality (arch):
+ personality="linux32"
+ if arch.find("64")>=0:
+ personality="linux64"
+ return personality
+
+ command=[]
+ # be verbose
+ command += ['/bin/bash','-x',]
+ command += ['/usr/sbin/vuseradd', ]
+ if 'attributes' in rec and 'isolate_loopback' in rec['attributes'] and rec['attributes']['isolate_loopback'] == '1':
+ command += [ "-i",]
+ # the vsliver imge to use
+ command += [ '-t', vref, ]
+ # slice name
+ command += [ name, ]
+# logger.log_call(['/usr/sbin/vuseradd', '-t', vref, name, ], timeout=15*60)
+ logger.log_call(command, timeout=15*60)
+ # 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 tools.root_context_arch() != arch:
+ file('/etc/vservers/%s/personality' % name, 'w').write(personality(arch)+"\n")
+ logger.log('sliver_vs: %s: set personality to %s'%(name,personality(arch)))
@staticmethod
- def destroy(name): logger.log_call('/usr/sbin/vuserdel', name)
+ def destroy(name):
+# logger.log_call(['/usr/sbin/vuserdel', name, ])
+ logger.log_call(['/bin/bash','-x','/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)
- self.initscriptchanged = True
- except: logger.log_exc(self.name)
+ # 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
+ code=file(vinit_source).read()
+ if tools.replace_file_with_string(vinit_script,code,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):
+ code=self.initscript
+ sliver_initscript="/vservers/%s/etc/rc.d/init.d/vinit.slice"%self.name
+ if tools.replace_file_with_string(sliver_initscript,code,remove_if_empty=True,chmod=0755):
+ if code:
+ 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))
+
+ # bind mount root side dir to sliver side
+ # needs to be done before sliver starts
+ def expose_ssh_dir (self):
+ try:
+ root_ssh="/home/%s/.ssh"%self.name
+ sliver_ssh="/vservers/%s/home/%s/.ssh"%(self.name,self.name)
+ # any of both might not exist yet
+ for path in [root_ssh,sliver_ssh]:
+ if not os.path.exists (path):
+ os.mkdir(path)
+ if not os.path.isdir (path):
+ raise Exception
+ mounts=file('/proc/mounts').read()
+ if mounts.find(sliver_ssh)<0:
+ # xxx perform mount
+ subprocess.call("mount --bind -o ro %s %s"%(root_ssh,sliver_ssh),shell=True)
+ logger.log("expose_ssh_dir: %s mounted into slice %s"%(root_ssh,self.name))
+ except:
+ logger.log_exc("expose_ssh_dir with slice %s failed"%self.name)
+
def start(self, delay=0):
- if self.rspec['enabled'] > 0:
- 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()
+ # expose .ssh for omf_friendly slivers
+ if 'omf_control' in self.rspec['tags']:
+ self.expose_ssh_dir()
+ # 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()
- 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)
- self.initscriptchanged = False
+ else:
+ os.waitpid(child_pid, 0)
def stop(self):
- logger.log('%s: stopping' % self.name)
+ logger.log('sliver_vs: %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))
+ logger.log('sliver_vs: %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: beginning' % self.name)
Sliver_VS._init_disk_info_sem.acquire()
+ logger.log('sliver_vs: %s: computing disk usage: beginning' % self.name)
+ # init_disk_info is inherited from VServer
try: self.init_disk_info()
finally: Sliver_VS._init_disk_info_sem.release()
- logger.log('%s: computing disk usage: ended' % self.name)
+ logger.log('sliver_vs: %s: computing disk usage: ended' % self.name)
self.disk_usage_initialized = True
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(self.name)
+ logger.log_exc('sliver_vs: failed to set max disk usage',name=self.name)
# get/set the min/soft/hard values for all of the vserver
# related RLIMITS. Note that vserver currently only
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)'
+ logger.log('sliver_vs: %s: setting rlimit %s to (%d, %d, %d)'
% (self.name, type, hard, soft, minimum))
self.set_capabilities_config(self.rspec['capabilities'])
if self.rspec['capabilities']:
- logger.log('%s: setting capabilities to %s' % (self.name, self.rspec['capabilities']))
-
- if False: # this code was commented out before
- # N.B. net_*_rate are in kbps because of XML-RPC maxint
- # limitations, convert to bps which is what bwlimit.py expects.
- net_limits = (self.rspec['net_min_rate'] * 1000,
- self.rspec['net_max_rate'] * 1000,
- self.rspec['net_i2_min_rate'] * 1000,
- self.rspec['net_i2_max_rate'] * 1000,
- 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)
+ logger.log('sliver_vs: %s: setting capabilities to %s' % (self.name, self.rspec['capabilities']))
cpu_pct = self.rspec['cpu_pct']
cpu_share = self.rspec['cpu_share']
+ 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))
+ logger.log('sliver_vs: %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))
+ logger.log('sliver_vs: %s: setting cpu share to %d' % (self.name, cpu_share))
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'])
+ logger.log('sliver_vs: %s: setting IP address(es) to %s' % \
+ (self.name, self.rspec['ip_addresses']))
+ add_loopback = True
+ if 'isolate_loopback' in self.rspec['tags']:
+ add_loopback = self.rspec['tags']['isolate_loopback'] != "1"
+ self.set_ipaddresses_config(self.rspec['ip_addresses'], add_loopback)
+
+ #logger.log("sliver_vs: %s: Setting name to %s" % (self.name, self.slice_id))
+ #self.setname(self.slice_id)
+ #logger.log("sliver_vs: %s: Storing slice id of %s for PlanetFlow" % (self.name, self.slice_id))
+ 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\n"%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)
+ logger.log('sliver_vs: %s: limits have changed --- restarting' % self.name)
stopcount = 10
while self.is_running() and stopcount > 0:
self.stop()
self.start()
else: # tell vsh to disable remote login by setting CPULIMIT to 0
- logger.log('%s: disabling remote login' % self.name)
+ logger.log('sliver_vs: %s: disabling remote login' % self.name)
self.set_sched_config(0, 0)
+ self.enabled = False
self.stop()
git://git.onelab.eu / nodemanager.git / blobdiff