X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sliver_vs.py;h=b7508565a2215e7036f6d8678943e9c4893f0427;hb=44e352eb6f5b0e1706234df9ade2f475fc75d9b7;hp=ed81f9472df8da9eec66c994d9ac43fdb0ea783e;hpb=e6f233023651a7bad3d7522d8db16ecd064cf463;p=nodemanager.git diff --git a/sliver_vs.py b/sliver_vs.py index ed81f94..b750856 100644 --- a/sliver_vs.py +++ b/sliver_vs.py @@ -1,5 +1,4 @@ -# $Id$ -# $URL$ +# """VServer slivers. @@ -22,15 +21,18 @@ don't have to guess if there is a running process or not. 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 @@ -40,11 +42,11 @@ KEEP_LIMIT = vserver.VC_LIM_KEEP 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 + 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): +class Sliver_VS(vserver.VServer, Account, Initscript): """This class wraps vserver.VServer to make its interface closer to what we need.""" SHELL = '/bin/vsh' @@ -52,37 +54,40 @@ class Sliver_VS(accounts.Account, vserver.VServer): _init_disk_info_sem = BoundedSemaphore() def __init__(self, rec): - name=rec['name'] + name = rec['name'] logger.verbose ('sliver_vs: %s init'%name) try: logger.log("sliver_vs: %s: first chance..."%name) - vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager') + 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_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) - vserver.VServer.__init__(self, name,logfile='/var/log/nodemanager') + 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.slice_id = rec['slice_id'] self.disk_usage_initialized = False - self.initscript = '' 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)) + # added by caglar # band-aid for short period as old API doesn't have GetSliceFamily function vref = "planetlab-f8-i386" - #return + 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() @@ -90,103 +95,88 @@ class Sliver_VS(accounts.Account, vserver.VServer): # 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)) + 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('-') + (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' + 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) + 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) # 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))) + logger.log('sliver_vs: %s: set personality to %s'%(name, personality(arch))) @staticmethod def destroy(name): -# logger.log_call(['/usr/sbin/vuserdel', name, ]) - logger.log_call(['/bin/bash','-x','/usr/sbin/vuserdel', 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 - # 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) - - # 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)) - else: - logger.log("vsliver_vs: %s: Removed obsolete initscript %s"%(self.name,sliver_initscript)) + # do the configure part from Initscript + # i.e. install slice initscript if defined + Initscript.configure(self, rec) + # install ssh keys + Account.configure(self, rec) + # remember configure() always gets called *before* start() + # in particular the slice initscript + # is expected to be in place already at this point def start(self, delay=0): 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) + 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 + tools.close_nonstandard_fds() + vserver.VServer.start(self) + os._exit(0) 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 - tools.close_nonstandard_fds() - vserver.VServer.start(self) - os._exit(0) - else: - os.waitpid(child_pid, 0) + os.waitpid(child_pid, 0) def stop(self): logger.log('sliver_vs: %s: stopping' % self.name) @@ -195,7 +185,16 @@ class Sliver_VS(accounts.Account, vserver.VServer): 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 @@ -210,7 +209,7 @@ class Sliver_VS(accounts.Account, vserver.VServer): self.disk_usage_initialized = True vserver.VServer.set_disklimit(self, max(disk_max, self.disk_blocks)) except: - logger.log_exc('sliver_vs: failed to set max disk usage',name=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 @@ -227,26 +226,35 @@ class Sliver_VS(accounts.Account, vserver.VServer): self.set_capabilities_config(self.rspec['capabilities']) if self.rspec['capabilities']: - logger.log('sliver_vs: %s: setting capabilities to %s' % (self.name, self.rspec['capabilities'])) + 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'] - 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//sysctl// + 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: @@ -265,7 +273,10 @@ class Sliver_VS(accounts.Account, vserver.VServer): 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) @@ -275,11 +286,11 @@ class Sliver_VS(accounts.Account, vserver.VServer): 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) + logger.log("sliver_vs: Recorded slice id %d for slice %s"%(self.slice_id, self.name)) + except IOError as e: + logger.log("sliver_vs: Could not record slice_id for slice %s. Error: %s"%(self.name, str(e))) + except Exception as e: + logger.log_exc("sliver_vs: Error recording slice id: %s"%str(e), name=self.name) if self.enabled == False: