-# $Id$
-# $URL$
+#
"""VServer slivers.
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
import logger
import tools
+from account import Account
+from initscript import Initscript
# special constant that tells vserver to keep its existing settings
KEEP_LIMIT = vserver.VC_LIM_KEEP
DEFAULT_ALLOCATION["%s_soft"%rlim]=KEEP_LIMIT
DEFAULT_ALLOCATION["%s_hard"%rlim]=KEEP_LIMIT
-class Sliver_VS(accounts.Account, vserver.VServer):
+class Sliver_VS(vserver.VServer, Account, Initscript):
"""This class wraps vserver.VServer to make its interface closer to what we need."""
SHELL = '/bin/vsh'
try:
logger.log("sliver_vs: %s: first chance..."%name)
vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager')
+ Account.__init__ (self, name)
+ Initscript.__init__ (self, name)
except Exception, err:
if not isinstance(err, vserver.NoSuchVServer):
# Probably a bad vserver or vserver configuration file
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['vref'])
- logger.log("sliver_vs: %s: second chance..."%name)
+ self.create(name, rec)
vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager')
+ Account.__init__ (self, name)
+ Initscript.__init__ (self, name)
- self.keys = ''
self.rspec = {}
- self.initscript = ''
self.slice_id = rec['slice_id']
self.disk_usage_initialized = False
- self.initscriptchanged = False
self.enabled = True
+ # xxx this almost certainly is wrong...
self.configure(rec)
@staticmethod
- def create(name, vref = None):
+ def create(name, rec = None):
logger.verbose('sliver_vs: %s: create'%name)
+ vref = rec['vref']
if vref is None:
- logger.log("sliver_vs: %s: ERROR - no vref attached, this is unexpected"%(name))
- return
- # used to look in /etc/planetlab/family,
+ # added by caglar
+ # band-aid for short period as old API doesn't have GetSliceFamily function
+ vref = "planetlab-f8-i386"
+ logger.log("sliver_vs: %s: ERROR - no vref attached, using hard-wired default %s"%(name,vref))
+
+ # 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
+ # compute guest personality
try:
(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
-
-# logger.log_call(['/usr/sbin/vuseradd', '-t', vref, name, ], timeout=15*60)
- logger.log_call(['/bin/bash','-x','/usr/sbin/vuseradd', '-t', vref, name, ], timeout=15*60)
+
+ def personality (arch): return "linux64" if arch.find("64") >=0 else "linux32"
+
+ 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(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)
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):
+ # need to umount before we trash, otherwise we end up with sequels in
+ # /vservers/slicename/ (namely in home/ )
+ # also because this is a static method we cannot check for 'omf_control'
+ # but it is no big deal as umount_ssh_dir checks before it umounts..
+ Account.umount_ssh_dir(name)
+ logger.log("sliver_vs: destroying %s"%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
self.set_resources()
- new_initscript = rec['initscript']
- if new_initscript != self.initscript:
- self.initscript = new_initscript
- self.initscriptchanged = True
+ # do the configure part from Initscript
+ Initscript.configure(self,rec)
- accounts.Account.configure(self, rec) # install ssh keys
+ Account.configure(self, rec) # install ssh keys
+ # remember configure() always gets called *before* start()
def start(self, delay=0):
- if self.rspec['enabled'] > 0:
- logger.log('sliver_vs: %s: starting in %d seconds' % (self.name, delay))
- time.sleep(delay)
- # VServer.start calls fork() internally,
+ if self.rspec['enabled'] <= 0:
+ logger.log('sliver_vs: not starting %s, is not enabled'%self.name)
+ return
+ 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']:
+ Account.mount_ssh_dir(self.name)
+ # 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
- child_pid = os.fork()
- if child_pid == 0:
- if self.initscriptchanged:
- logger.log('sliver_vs: %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, self.initscript)
- os.close(fd)
- try:
- self.chroot_call(install_initscript)
- except: logger.log_exc("sliver_vs: start",name=self.name)
- tools.close_nonstandard_fds()
- vserver.VServer.start(self)
- os._exit(0)
- else:
- os.waitpid(child_pid, 0)
- self.initscriptchanged = False
- else: logger.log('sliver_vs: not starting %s, is not enabled'%self.name)
+ tools.close_nonstandard_fds()
+ vserver.VServer.start(self)
+ os._exit(0)
+ else:
+ os.waitpid(child_pid, 0)
def stop(self):
logger.log('sliver_vs: %s: stopping' % self.name)
vserver.VServer.stop(self)
- def is_running(self):
+ def is_running(self):
return vserver.VServer.is_running(self)
- def set_resources(self,setup=False):
+ # this one seems to belong in Initscript at first sight,
+ # but actually depends on the underlying vm techno
+ # so let's keep it here
+ 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)
+
+ def set_resources(self):
disk_max = self.rspec['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
self.vm_running = False
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('sliver_vs: %s: computing disk usage: ended' % self.name)
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('.')
+ 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:
- path="/proc/sys/%s" % ("/".join(sysctl[1:]))
- logger.log("sliver_vs: %s: opening %s"%(self.name,path))
- flags = os.O_WRONLY
- fd = os.open(path, flags)
- logger.log("sliver_vs: %s: writing %s=%s"%(self.name,key,self.rspec[key]))
- os.write(fd,self.rspec[key])
- os.close(fd)
- 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))
+ 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 self.rspec['ip_addresses'] != '0.0.0.0':
logger.log('sliver_vs: %s: setting IP address(es) to %s' % \
(self.name, self.rspec['ip_addresses']))
- self.set_ipaddresses_config(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: 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
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('sliver_vs: %s: limits have changed --- restarting' % self.name)
git://git.onelab.eu / nodemanager.git / blobdiff