def restartService():
    if not os.path.exists("/etc/init.d/codemux"): return
    logger.log("codemux:  Restarting codemux service")
    if isRunning():
        logger.log_call(["/etc/init.d/codemux","condrestart", ])
    else:
        logger.log_call(["/etc/init.d/codemux","restart", ])
Example #2
0
def handleService(keyword):
    if tools.has_systemctl():
        logger.log("vsys: %s'ing vsys service through systemctl"%keyword)
        return logger.log_call(["systemctl", keyword, "vsys"], timeout=5)
    else:
        logger.log("vsys: %s'ing vsys service through /etc/init.d/vsys"%keyword)
        return logger.log_call(["/etc/init.d/vsys", keyword], timeout=5)
Example #3
0
def GetSlivers(data, config=None, plc=None):
    """For each sliver with the vsys attribute, set the script ACL, create the vsys directory in the slice, and restart vsys."""

    if 'slivers' not in data:
        logger.log_missing_data("vsys.GetSlivers",'slivers')
        return

    # Touch ACLs and create dict of available
    scripts = {}
    for script in touchAcls(): scripts[script] = []
    # slices that need to be written to the conf
    slices = []
    _restart = False
    # Parse attributes and update dict of scripts
    if 'slivers' not in data:
        logger.log_missing_data("vsys.GetSlivers",'slivers')
        return
    for sliver in data['slivers']:
        for attribute in sliver['attributes']:
            if attribute['tagname'] == 'vsys':
                if sliver['name'] not in slices:
                    # add to conf
                    slices.append(sliver['name'])
                    _restart = createVsysDir(sliver['name']) or _restart
                if attribute['value'] in scripts.keys():
                    scripts[attribute['value']].append(sliver['name'])

    # Write the conf
    _restart = writeConf(slices, parseConf()) or _restart
    # Write out the ACLs
    if writeAcls(scripts, parseAcls()) or _restart:
        logger.log("vsys: restarting vsys service")
        logger.log_call(["/etc/init.d/vsys", "restart", ])
Example #4
0
def restartService():
    if not os.path.exists("/etc/init.d/codemux"): return
    logger.log("codemux:  Restarting codemux service")
    if isRunning():
        logger.log_call(["/etc/init.d/codemux","condrestart", ])
    else:
        logger.log_call(["/etc/init.d/codemux","restart", ])
Example #5
0
def set_up(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix):
    newXml = networkElem.toxml()
    #logger.log(networkElem.toxml())
    #ret = dir(conn)
    #for method in ret:
    #    logger.log(repr(method))
    networkLibvirt.undefine()
    networkLibvirt.destroy()
    connLibvirt.networkCreateXML(newXml)
    networkDefault = connLibvirt.networkDefineXML(newXml)
    set_autostart(networkDefault)
    commandForwarding = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1']
    logger.log_call(commandForwarding, timeout=15*60)
    configRadvd = """
interface virbr0
{
        AdvSendAdvert on;
        MinRtrAdvInterval 30;
        MaxRtrAdvInterval 100;
        prefix %(ipv6addr)s/%(prefix)s
        {
                AdvOnLink on;
                AdvAutonomous on;
                AdvRouterAddr off;
        };

};
""" % locals()
    with open(radvd_conf_file, 'w') as f:
        f.write(configRadvd)
    kill_radvd()
    start_radvd()
    logger.log("ipv6: set up process finalized -- enabled IPv6 address to the slivers!")
Example #6
0
def GetSlivers(data, config=None, plc=None):
    """For each sliver with the vsys attribute, set the script ACL, create the vsys directory in the slice, and restart vsys."""

    if 'slivers' not in data:
        logger.log_missing_data("vsys.GetSlivers",'slivers')
        return

    # Touch ACLs and create dict of available
    scripts = {}
    for script in touchAcls(): scripts[script] = []
    # slices that need to be written to the conf
    slices = []
    _restart = False
    # Parse attributes and update dict of scripts
    if 'slivers' not in data:
        logger.log_missing_data("vsys.GetSlivers",'slivers')
        return
    for sliver in data['slivers']:
        for attribute in sliver['attributes']:
            if attribute['tagname'] == 'vsys':
                if sliver['name'] not in slices:
                    # add to conf
                    slices.append(sliver['name'])
                    _restart = createVsysDir(sliver['name']) or _restart
                if attribute['value'] in scripts.keys():
                    scripts[attribute['value']].append(sliver['name'])

    # Write the conf
    _restart = writeConf(slices, parseConf()) or _restart
    # Write out the ACLs
    if writeAcls(scripts, parseAcls()) or _restart:
        logger.log("vsys: restarting vsys service")
        logger.log_call(["/etc/init.d/vsys", "restart", ])
Example #7
0
def ensure_slicebridge_created(name, addr):
    bridges = ovs_listbridge()
    logger.log("privatebridge: current bridges = " + ",".join(bridges))
    if name in bridges:
        return

    ovs_addbridge(name)

    logger.log_call(["ifconfig", name, addr, "netmask", "255.0.0.0"])
def ensure_slicebridge_created(name, addr):
    bridges = ovs_listbridge()
    logger.log("privatebridge: current bridges = " + ",".join(bridges))
    if name in bridges:
        return

    ovs_addbridge(name)

    logger.log_call(["ifconfig", name, addr, "netmask", "255.0.0.0"])
 def rerun_slice_vinit(self):
     """This is called at startup, and whenever the initscript code changes"""
     logger.log("sliver_lxc.rerun_slice_vinit {}".format(self.name))
     plain = "virsh -c lxc:/// lxc-enter-namespace --noseclabel -- {} /usr/bin/systemctl --system daemon-reload"\
         .format(self.name)
     command = plain.split()
     logger.log_call(command, timeout=3)
     plain = "virsh -c lxc:/// lxc-enter-namespace --noseclabel -- {} /usr/bin/systemctl restart vinit.service"\
         .format(self.name)
     command = plain.split()
     logger.log_call(command, timeout=3)
Example #10
0
 def debug_box(self, message, slicename=None):
     if reservation.debug:
         logger.log('reservation: ' + message)
         logger.log_call([
             '/usr/sbin/vserver-stat',
         ])
         if slicename:
             logger.log_call([
                 '/usr/sbin/vserver',
                 slicename,
                 'status',
             ])
    def start(self, delay=0):
        '''Just start the sliver'''
        logger.verbose('sliver_libvirt: {} start'.format(self.name))

        # TD: Added OpenFlow rules to avoid OpenVSwitch-based slivers'
        # auto-configuration issues when IPv6 auto-config and/or DHCP are
        # available in the node's network. Sliver configuration is static.
        if os.path.exists('/usr/bin/ovs-ofctl'):
            logger.log('Adding OpenFlow rules to prevent IPv6 auto-config and DHCP in OpenVSwitch slivers')
            # IPv6 ICMP Router Solicitation and Advertisement
            logger.log_call([ '/usr/bin/ovs-ofctl', 'add-flow', 'public0', 'priority=100,icmp6,icmp_type=133,idle_timeout=0,hard_timeout=0,actions=drop' ])
            logger.log_call([ '/usr/bin/ovs-ofctl', 'add-flow', 'public0', 'priority=100,icmp6,icmp_type=134,idle_timeout=0,hard_timeout=0,actions=drop' ])
            # IPv4 DHCP
            logger.log_call([ '/usr/bin/ovs-ofctl', 'add-flow', 'public0', 'priority=101,udp,nw_src=0.0.0.0,nw_dst=255.255.255.255,tp_src=68,tp_dst=67,idle_timeout=0,hard_timeout=0,actions=drop' ])
            logger.log_call([ '/usr/bin/ovs-ofctl', 'add-flow', 'public0', 'priority=101,udp,tp_src=67,tp_dst=68,idle_timeout=0,hard_timeout=0,actions=drop' ])
        else:
            logger.log('NOTE: /usr/bin/ovs-ofctl not found!')

        # Check if it's running to avoid throwing an exception if the
        # domain was already running
        if not self.is_running():
            try:
                # create actually means start
                self.dom.create()
            except Exception as e:
                # XXX smbaker: attempt to resolve slivers that are stuck in
                #   "failed to allocate free veth".
                if "ailed to allocate free veth" in str(e):
                     logger.log("failed to allocate free veth on {}".format(self.name))
                     self.repair_veth()
                     logger.log("trying dom.create again")
                     self.dom.create()
                else:
                    raise
        else:
            logger.verbose('sliver_libvirt: sliver {} already started'.format(self.name))

        # After the VM is started... we can play with the virtual interface
        # Create the ebtables rule to mark the packets going out from the virtual
        # interface to the actual device so the filter canmatch against the mark
        bwlimit.ebtables("-A INPUT -i veth{} -j mark --set-mark {}"
                         .format(self.xid, self.xid))

        # TD: Turn off SCTP checksum offloading. It is currently not working. FIXME: check for a kernel fix!
        result = logger.log_call(['/usr/sbin/lxcsu', '-r', self.name, '--', '/usr/sbin/ethtool', '-K', 'eth0', 'tx-checksum-sctp', 'off'])
        if not result:
            logger.log('unable to apply SCTP checksum bug work-around for %s' % self.name)

        # TD: Work-around for missing interface configuration: ensure that networking service is running.
        result = logger.log_call(['/usr/sbin/lxcsu', '-r', self.name, '/sbin/service', 'network', 'restart'])
        if not result:
            logger.log('unable to restart networking service for %s' % self.name)
Example #12
0
    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
            #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:
            (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)))
 def create(name, vref=None):
     add_shell(Controller.SHELL)
     group = getgrnam("slices")[2]
     logger.log_call([
         '/usr/sbin/useradd',
         '-p',
         '*',
         '-g',
         str(group),
         '-s',
         Controller.SHELL,
         name,
     ])
    def repair_veth(self):
        # See workaround email, 2-14-2014, "libvirt 1.2.1 rollout"
        xmlfilename = "/etc/libvirt/lxc/{}.xml".format(self.name)
        with open(xmlfilename) as xmlfile:
            xml = xmlfile.read()
        veths = re.findall("<target dev='veth[0-9]*'/>", xml)
        veths = [x[13:-3] for x in veths]
        for veth in veths:
            command = ["ip", "link", "delete", veth]
            logger.log_call(command)

        logger.log("trying to redefine the VM")
        command = [ "virsh", "define", xmlfilename ]
        logger.log_call(command)
Example #15
0
def DRLInstall(slice_name):
    if not os.path.exists('/vservers/%s/etc/yum.repos.d/myplc.repo' % slice_name):
        shutil.copyfile('/etc/yum.myplc.d/myplc.repo', '/vservers/%s/etc/yum.repos.d/myplc.repo' % slice_name)
        logger.log('drl: installing DistributedRateLimiting into %s slice' % slice_name)
        logger.log_call(['vserver', '%s' % slice_name, 'suexec', '0', 'yum', 'install', '-y', '-q', 'DistributedRateLimiting'])
        logger.log_call(['vserver', '%s' % slice_name, 'suexec', '0', 'chkconfig', '--add', 'ulogd'])
    else:
        logger.log('drl: updating DistributedRateLimiting on %s slice' % slice_name)
        logger.log_call(['vserver', '%s' % slice_name, 'suexec', '0', 'yum', 'update', '-y', '-q', 'DistributedRateLimiting'])

    logger.log('drl: (re)starting DistributedRateLimiting service')
    logger.log_call(['vserver', '%s' % slice_name, 'suexec', '0', 'service', 'ulogd', 'restart'])
Example #16
0
 def log_all_calls(self, really=True):
     """
     Logs calls of all methods other than self.log_exceptions
     if its name starts with [a-z].
     """
     if really:
         for name in dir(self):
             if name[0] in string.ascii_lowercase\
                 and callable(getattr(self, name))\
                 and name not in self.log_exceptions:
                 setattr(self, name, log_call(log)(getattr(self, name)))
    def destroy(name):
        # umount .ssh directory - only if mounted
        Account.umount_ssh_dir(name)
        logger.verbose('sliver_lxc: %s destroy' % (name))
        conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)

        containerDir = Sliver_LXC.CON_BASE_DIR + '/%s' % (name)

        try:
            # Destroy libvirt domain
            dom = conn.lookupByName(name)
        except:
            logger.verbose('sliver_lxc: Domain %s does not exist!' % name)

        try:
            dom.destroy()
        except:
            logger.verbose('sliver_lxc: Domain %s not running... continuing.' %
                           name)

        try:
            dom.undefine()
        except:
            logger.verbose(
                'sliver_lxc: Domain %s is not defined... continuing.' % name)

        # Remove user after destroy domain to force logout
        command = ['/usr/sbin/userdel', '-f', '-r', name]
        logger.log_call(command, timeout=15 * 60)

        if os.path.exists(os.path.join(containerDir, "vsys")):
            # Slivers with vsys running will fail the subvolume delete.
            # A more permanent solution may be to ensure that the vsys module
            # is called before the sliver is destroyed.
            logger.log("destroying vsys directory and restarting vsys")
            logger.log_call(["rm", "-fR", os.path.join(containerDir, "vsys")])
            logger.log_call([
                "/etc/init.d/vsys",
                "restart",
            ])

        # Remove rootfs of destroyed domain
        command = ['btrfs', 'subvolume', 'delete', containerDir]
        logger.log_call(command, timeout=60)

        if os.path.exists(containerDir):
            # oh no, it's still here...
            logger.log("WARNING: failed to destroy container %s" %
                       containerDir)

        logger.verbose('sliver_libvirt: %s destroyed.' % name)
Example #18
0
    def destroy(name):
        # umount .ssh directory - only if mounted
        Account.umount_ssh_dir(name)
        logger.verbose ('sliver_lxc: %s destroy'%(name))
        conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)

        containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name)

        try:
            # Destroy libvirt domain
            dom = conn.lookupByName(name)
        except:
            logger.verbose('sliver_lxc: Domain %s does not exist!' % name)

        try:
            dom.destroy()
        except:
            logger.verbose('sliver_lxc: Domain %s not running... continuing.' % name)

        try:
            dom.undefine()
        except:
            logger.verbose('sliver_lxc: Domain %s is not defined... continuing.' % name)

        # Remove user after destroy domain to force logout
        command = ['/usr/sbin/userdel', '-f', '-r', name]
        logger.log_call(command, timeout=15*60)

        if os.path.exists(os.path.join(containerDir,"vsys")):
            # Slivers with vsys running will fail the subvolume delete.
            # A more permanent solution may be to ensure that the vsys module
            # is called before the sliver is destroyed.
            logger.log("destroying vsys directory and restarting vsys")
            logger.log_call(["rm", "-fR", os.path.join(containerDir, "vsys")])
            logger.log_call(["/etc/init.d/vsys", "restart", ])

        # Remove rootfs of destroyed domain
        command = ['btrfs', 'subvolume', 'delete', containerDir]
        logger.log_call(command, timeout=60)

        if os.path.exists(containerDir):
           # oh no, it's still here...
           logger.log("WARNING: failed to destroy container %s" % containerDir)

        logger.verbose('sliver_libvirt: %s destroyed.'%name)
Example #19
0
def generate_sshkey (sliver): 
# initial version was storing stuff in the sliver directly
#    keyfile="/vservers/%s/home/%s/.ssh/id_rsa"%(sliver['name'],sliver['name'])
# we're now storing this in the same place as the authorized_keys, which in turn
# gets mounted to the user's home directory in the sliver
    keyfile="/home/%s/.ssh/id_rsa"%(sliver['name'])
    pubfile="%s.pub"%keyfile
    dotssh=os.path.dirname(keyfile)
    # create dir if needed
    if not os.path.isdir (dotssh):
        os.mkdir (dotssh, 0700)
        logger.log_call ( [ 'chown', "%s:slices"%(sliver['name']), dotssh ] )
    if not os.path.isfile (pubfile):
        comment="%s@%s"%(sliver['name'],socket.gethostname())
        logger.log_call( [ 'ssh-keygen', '-t', 'rsa', '-N', '', '-f', keyfile , '-C', comment] )
        os.chmod (keyfile, 0400)
        logger.log_call ( [ 'chown', "%s:slices"%(sliver['name']), keyfile, pubfile ] )
    return file(pubfile).read().strip()
def generate_sshkey(sliver):
    # initial version was storing stuff in the sliver directly
    #    keyfile="/vservers/%s/home/%s/.ssh/id_rsa"%(sliver['name'],sliver['name'])
    # we're now storing this in the same place as the authorized_keys, which in turn
    # gets mounted to the user's home directory in the sliver
    keyfile = "/home/%s/.ssh/id_rsa" % (sliver['name'])
    pubfile = "%s.pub" % keyfile
    dotssh = os.path.dirname(keyfile)
    # create dir if needed
    if not os.path.isdir(dotssh):
        os.mkdir(dotssh, 0700)
        logger.log_call(['chown', "%s:slices" % (sliver['name']), dotssh])
    if not os.path.isfile(pubfile):
        comment = "%s@%s" % (sliver['name'], socket.gethostname())
        logger.log_call([
            'ssh-keygen', '-t', 'rsa', '-N', '', '-f', keyfile, '-C', comment
        ])
        os.chmod(keyfile, 0400)
        logger.log_call(
            ['chown',
             "%s:slices" % (sliver['name']), keyfile, pubfile])
    return file(pubfile).read().strip()
Example #21
0
    def destroy(name):
#        logger.log_call(['/usr/sbin/vuserdel', name, ])
        logger.log_call(['/bin/bash','-x','/usr/sbin/vuserdel', name, ])
    def create(name, rec=None):
        ''' Create dirs, copy fs image, lxc_create '''
        logger.verbose('sliver_lxc: %s create' % (name))
        conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)

        # Get the type of image from vref myplc tags specified as:
        # pldistro = lxc
        # fcdistro = squeeze
        # arch x86_64

        arch = 'x86_64'
        tags = rec['rspec']['tags']
        if 'arch' in tags:
            arch = tags['arch']
            if arch == 'i386':
                arch = 'i686'

        vref = rec['vref']
        if vref is None:
            vref = "lxc-f14-x86_64"
            logger.log(
                "sliver_libvirt: %s: WARNING - no vref attached, using hard-wired default %s"
                % (name, vref))

        refImgDir = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref)
        containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)

        # check the template exists -- there's probably a better way..
        if not os.path.isdir(refImgDir):
            logger.log(
                'sliver_lxc: %s: ERROR Could not create sliver - reference image %s not found'
                % (name, vref))
            logger.log('sliver_lxc: %s: ERROR Expected reference image in %s' %
                       (name, refImgDir))
            return

        # Snapshot the reference image fs (assume the reference image is in its own
        # subvolume)
        command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
        if not logger.log_call(command, timeout=15 * 60):
            logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at',
                       containerDir)
            return
        command = ['chmod', '755', containerDir]
        logger.log_call(command, timeout=15 * 60)

        # TODO: set quotas...

        # Set hostname. A valid hostname cannot have '_'
        #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
        #    print >>f, name.replace('_', '-')

        # Add slices group if not already present
        try:
            group = grp.getgrnam('slices')
        except:
            command = ['/usr/sbin/groupadd', 'slices']
            logger.log_call(command, timeout=15 * 60)

        # Add unix account (TYPE is specified in the subclass)
        command = [
            '/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name,
            '-p', '*'
        ]
        logger.log_call(command, timeout=15 * 60)
        command = ['mkdir', '/home/%s/.ssh' % name]
        logger.log_call(command, timeout=15 * 60)

        # Create PK pair keys to connect from the host to the guest without
        # password... maybe remove the need for authentication inside the
        # guest?
        command = [
            'su', '-s', '/bin/bash', '-c',
            'ssh-keygen -t rsa -N "" -f /home/%s/.ssh/id_rsa' % (name)
        ]
        logger.log_call(command, timeout=60)

        command = ['chown', '-R', '%s.slices' % name, '/home/%s/.ssh' % name]
        logger.log_call(command, timeout=30)

        command = ['mkdir', '%s/root/.ssh' % containerDir]
        logger.log_call(command, timeout=10)

        command = [
            'cp',
            '/home/%s/.ssh/id_rsa.pub' % name,
            '%s/root/.ssh/authorized_keys' % containerDir
        ]
        logger.log_call(command, timeout=30)

        logger.log("creating /etc/slicename file in %s" %
                   os.path.join(containerDir, 'etc/slicename'))
        try:
            file(os.path.join(containerDir, 'etc/slicename'), 'w').write(name)
        except:
            logger.log_exc("exception while creating /etc/slicename")

        try:
            file(os.path.join(containerDir, 'etc/slicefamily'),
                 'w').write(vref)
        except:
            logger.log_exc("exception while creating /etc/slicefamily")

        uid = None
        try:
            uid = getpwnam(name).pw_uid
        except KeyError:
            # keyerror will happen if user id was not created successfully
            logger.log_exc("exception while getting user id")

        if uid is not None:
            logger.log("uid is %d" % uid)
            command = ['mkdir', '%s/home/%s' % (containerDir, name)]
            logger.log_call(command, timeout=10)
            command = ['chown', name, '%s/home/%s' % (containerDir, name)]
            logger.log_call(command, timeout=10)
            etcpasswd = os.path.join(containerDir, 'etc/passwd')
            etcgroup = os.path.join(containerDir, 'etc/group')
            if os.path.exists(etcpasswd):
                # create all accounts with gid=1001 - i.e. 'slices' like it is in the root context
                slices_gid = 1001
                logger.log(
                    "adding user %(name)s id %(uid)d gid %(slices_gid)d to %(etcpasswd)s"
                    % (locals()))
                try:
                    file(etcpasswd, 'a').write(
                        "%(name)s:x:%(uid)d:%(slices_gid)d::/home/%(name)s:/bin/bash\n"
                        % locals())
                except:
                    logger.log_exc("exception while updating %s" % etcpasswd)
                logger.log(
                    "adding group slices with gid %(slices_gid)d to %(etcgroup)s"
                    % locals())
                try:
                    file(etcgroup,
                         'a').write("slices:x:%(slices_gid)d\n" % locals())
                except:
                    logger.log_exc("exception while updating %s" % etcgroup)
            sudoers = os.path.join(containerDir, 'etc/sudoers')
            if os.path.exists(sudoers):
                try:
                    file(sudoers,
                         'a').write("%s ALL=(ALL) NOPASSWD: ALL\n" % name)
                except:
                    logger.log_exc("exception while updating /etc/sudoers")

        # customizations for the user environment - root or slice uid
        # we save the whole business in /etc/planetlab.profile
        # and source this file for both root and the slice uid's .profile
        # prompt for slice owner, + LD_PRELOAD for transparently wrap bind
        pl_profile = os.path.join(containerDir, "etc/planetlab.profile")
        ld_preload_text = """# by default, we define this setting so that calls to bind(2),
# when invoked on 0.0.0.0, get transparently redirected to the public interface of this node
# see https://svn.planet-lab.org/wiki/LxcPortForwarding"""
        usrmove_path_text = """# VM's before Features/UsrMove need /bin and /sbin in their PATH"""
        usrmove_path_code = """
pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}
pathmunge /bin after
pathmunge /sbin after
unset pathmunge
"""
        with open(pl_profile, 'w') as f:
            f.write("export PS1='%s@\H \$ '\n" % (name))
            f.write("%s\n" % ld_preload_text)
            f.write("export LD_PRELOAD=/etc/planetlab/lib/bind_public.so\n")
            f.write("%s\n" % usrmove_path_text)
            f.write("%s\n" % usrmove_path_code)

        # make sure this file is sourced from both root's and slice's .profile
        enforced_line = "[ -f /etc/planetlab.profile ] && source /etc/planetlab.profile\n"
        for path in ['root/.profile', 'home/%s/.profile' % name]:
            from_root = os.path.join(containerDir, path)
            # if dir is not yet existing let's forget it for now
            if not os.path.isdir(os.path.dirname(from_root)): continue
            found = False
            try:
                contents = file(from_root).readlines()
                for content in contents:
                    if content == enforced_line: found = True
            except IOError:
                pass
            if not found:
                with open(from_root, "a") as user_profile:
                    user_profile.write(enforced_line)
                # in case we create the slice's .profile when writing
                if from_root.find("/home") >= 0:
                    command = ['chown', '%s:slices' % name, from_root]
                    logger.log_call(command, timeout=5)

        # Lookup for xid and create template after the user is created so we
        # can get the correct xid based on the name of the slice
        xid = bwlimit.get_xid(name)

        # Template for libvirt sliver configuration
        template_filename_sliceimage = os.path.join(
            Sliver_LXC.REF_IMG_BASE_DIR, 'lxc_template.xml')
        if os.path.isfile(template_filename_sliceimage):
            logger.log("WARNING: using compat template %s" %
                       template_filename_sliceimage)
            template_filename = template_filename_sliceimage
        else:
            logger.log("Cannot find XML template %s" %
                       template_filename_sliceimage)
            return

        interfaces = Sliver_Libvirt.get_interfaces_xml(rec)

        try:
            with open(template_filename) as f:
                template = Template(f.read())
                xml = template.substitute(name=name,
                                          xid=xid,
                                          interfaces=interfaces,
                                          arch=arch)
        except IOError:
            logger.log('Failed to parse or use XML template file %s' %
                       template_filename)
            return

        # Lookup for the sliver before actually
        # defining it, just in case it was already defined.
        try:
            dom = conn.lookupByName(name)
        except:
            dom = conn.defineXML(xml)
        logger.verbose('lxc_create: %s -> %s' %
                       (name, Sliver_Libvirt.debuginfo(dom)))
Example #23
0
def kill_radvd():
    command_kill_radvd = ['killall', 'radvd']
    logger.log_call(command_kill_radvd, timeout=15*60)
Example #24
0
def start_radvd():
    commandRadvd = ['radvd']
    logger.log_call(commandRadvd, timeout=15*60)
    def create(name, rec=None):
        '''
        Create dirs, copy fs image, lxc_create
        '''
        logger.verbose('sliver_lxc: {} create'.format(name))
        conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)

        vref = rec['vref']
        if vref is None:
            vref = "lxc-f24-x86_64"
            logger.log("sliver_libvirt: {}: WARNING - no vref attached, using hard-wired default {}"
                       .format(name, vref))

        # compute guest arch from vref
        # essentially we want x86_64 (default) or i686 here for libvirt
        try:
            (x, y, arch) = vref.split('-')
            arch = "x86_64" if arch.find("64") >= 0 else "i686"
        except:
            arch = 'x86_64'

        # Get the type of image from vref myplc tags specified as:
        # pldistro = lxc
        # fcdistro = squeeze
        # arch x86_64

        arch = 'x86_64'
        tags = rec['rspec']['tags']
        if 'arch' in tags:
            arch = tags['arch']
            if arch == 'i386':
                arch = 'i686'


        refImgDir    = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref)
        containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)

        # check the template exists -- there's probably a better way..
        if not os.path.isdir(refImgDir):
            logger.log('sliver_lxc: {}: ERROR Could not create sliver - reference image {} not found'
                       .format(name, vref))
            logger.log('sliver_lxc: {}: ERROR Expected reference image in {}'.format(name, refImgDir))
            return

# during some time this fragment had been commented out
# but we're seeing cases where this code might actually be useful, so..
#        this hopefully should be fixed now
#        # in fedora20 we have some difficulty in properly cleaning up /vservers/<slicename>
#        # also note that running e.g. btrfs subvolume create /vservers/.lvref/image /vservers/foo
#        # behaves differently, whether /vservers/foo exists or not:
#        # if /vservers/foo does not exist, it creates /vservers/foo
#        # but if it does exist, then       it creates /vservers/foo/image !!
#        # so we need to check the expected container rootfs does not exist yet
#        # this hopefully could be removed in a future release
        if os.path.exists (containerDir):
            logger.log("sliver_lxc: {}: WARNING cleaning up pre-existing {}".format(name, containerDir))
            command = ['btrfs', 'subvolume', 'delete', containerDir]
            logger.log_call(command, BTRFS_TIMEOUT)
            # re-check
            if os.path.exists (containerDir):
                logger.log('sliver_lxc: {}: ERROR Could not create sliver - could not clean up empty {}'
                           .format(name, containerDir))
                return

        # Snapshot the reference image fs
        # this assumes the reference image is in its own subvolume
        command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
        if not logger.log_call(command, timeout=BTRFS_TIMEOUT):
            logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at {}'
                       .format(containerDir))
            return
        command = ['chmod', '755', containerDir]
        logger.log_call(command)

        # TODO: set quotas...

        # Set hostname. A valid hostname cannot have '_'
        #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
        #    print >>f, name.replace('_', '-')

        # Add slices group if not already present
        try:
            group = grp.getgrnam('slices')
        except:
            command = ['/usr/sbin/groupadd', 'slices']
            logger.log_call(command)

        # Add unix account (TYPE is specified in the subclass)
        command = ['/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name, '-p', '*']
        logger.log_call(command)
        command = ['mkdir', '/home/{}/.ssh'.format(name)]
        logger.log_call(command)

        # Create PK pair keys to connect from the host to the guest without
        # password... maybe remove the need for authentication inside the
        # guest?
        command = ['su', '-s', '/bin/bash', '-c',
                   'ssh-keygen -t rsa -N "" -f /home/{}/.ssh/id_rsa'.format(name)]
        logger.log_call(command)

        command = ['chown', '-R', '{}:slices'.format(name), '/home/{}/.ssh'.format(name)]
        logger.log_call(command)

        command = ['mkdir', '{}/root/.ssh'.format(containerDir)]
        logger.log_call(command)

        command = ['cp', '/home/{}/.ssh/id_rsa.pub'.format(name),
                   '{}/root/.ssh/authorized_keys'.format(containerDir)]
        logger.log_call(command)

        logger.log("creating /etc/slicename file in {}".format(os.path.join(containerDir, 'etc/slicename')))
        try:
            with open(os.path.join(containerDir, 'etc/slicename'), 'w') as f:
                f.write(name)
        except:
            logger.log_exc("exception while creating /etc/slicename")

        try:
            with open(os.path.join(containerDir, 'etc/slicefamily'), 'w') as f:
                f.write(vref)
        except:
            logger.log_exc("exception while creating /etc/slicefamily")

        uid = None
        try:
            uid = getpwnam(name).pw_uid
        except KeyError:
            # keyerror will happen if user id was not created successfully
            logger.log_exc("exception while getting user id")

        if uid is not None:
            logger.log("uid is {}".format(uid))
            command = ['mkdir', '{}/home/{}'.format(containerDir, name)]
            logger.log_call(command)
            command = ['chown', name, '{}/home/{}'.format(containerDir, name)]
            logger.log_call(command)
            etcpasswd = os.path.join(containerDir, 'etc/passwd')
            etcgroup = os.path.join(containerDir, 'etc/group')
            if os.path.exists(etcpasswd):
                # create all accounts with gid=1001 - i.e. 'slices' like it is in the root context
                slices_gid = 1001
                logger.log("adding user {name} id {uid} gid {slices_gid} to {etcpasswd}"
                           .format(**(locals())))
                try:
                    with open(etcpasswd, 'a') as passwdfile:
                        passwdfile.write("{name}:x:{uid}:{slices_gid}::/home/{name}:/bin/bash\n"
                                         .format(**locals()))
                except:
                    logger.log_exc("exception while updating {}".format(etcpasswd))
                logger.log("adding group slices with gid {slices_gid} to {etcgroup}"
                           .format(**locals()))
                try:
                    with open(etcgroup, 'a') as groupfile:
                        groupfile.write("slices:x:{slices_gid}\n"
                                        .format(**locals()))
                except:
                    logger.log_exc("exception while updating {}".format(etcgroup))
            sudoers = os.path.join(containerDir, 'etc/sudoers')
            if os.path.exists(sudoers):
                try:
                    with open(sudoers, 'a') as f:
                        f.write("{} ALL=(ALL) NOPASSWD: ALL\n".format(name))
                except:
                    logger.log_exc("exception while updating /etc/sudoers")

        # customizations for the user environment - root or slice uid
        # we save the whole business in /etc/planetlab.profile
        # and source this file for both root and the slice uid's .profile
        # prompt for slice owner, + LD_PRELOAD for transparently wrap bind
        pl_profile = os.path.join(containerDir, "etc/planetlab.profile")
        ld_preload_text = """# by default, we define this setting so that calls to bind(2),
# when invoked on 0.0.0.0, get transparently redirected to the public interface of this node
# see https://svn.planet-lab.org/wiki/LxcPortForwarding"""
        usrmove_path_text = """# VM's before Features/UsrMove need /bin and /sbin in their PATH"""
        usrmove_path_code = """
pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}
pathmunge /bin after
pathmunge /sbin after
unset pathmunge
"""
        with open(pl_profile, 'w') as f:
            f.write("export PS1='{}@\H \$ '\n".format(name))
            f.write("{}\n".format(ld_preload_text))
            f.write("if [ -e /etc/planetlab/lib/bind_public.so ] ; then   # Only preload bind_public if it exists.\n")
            f.write("   export LD_PRELOAD=/etc/planetlab/lib/bind_public.so\n")
            f.write("fi\n")
            f.write("{}\n".format(usrmove_path_text))
            f.write("{}\n".format(usrmove_path_code))

        # make sure this file is sourced from both root's and slice's .profile
        enforced_line = "[ -f /etc/planetlab.profile ] && source /etc/planetlab.profile\n"
        for path in [ 'root/.profile', 'home/{}/.profile'.format(name) ]:
            from_root = os.path.join(containerDir, path)
            # if dir is not yet existing let's forget it for now
            if not os.path.isdir(os.path.dirname(from_root)): continue
            found = False
            try:
                with open(from_root) as f:
                    contents = f.readlines()
                    for content in contents:
                        if content == enforced_line:
                            found = True
            except IOError:
                pass
            if not found:
                with open(from_root, "a") as user_profile:
                    user_profile.write(enforced_line)
                # in case we create the slice's .profile when writing
                if from_root.find("/home") >= 0:
                    command = ['chown', '{}:slices'.format(name), from_root]
                    logger.log_call(command)

        # Lookup for xid and create template after the user is created so we
        # can get the correct xid based on the name of the slice
        xid = bwlimit.get_xid(name)

        # Template for libvirt sliver configuration
        template_filename_sliceimage = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, 'lxc_template.xml')
        if os.path.isfile(template_filename_sliceimage):
            logger.verbose("Using XML template {}".format(template_filename_sliceimage))
            template_filename = template_filename_sliceimage
        else:
            logger.log("Cannot find XML template {}".format(template_filename_sliceimage))
            return

        interfaces = Sliver_Libvirt.get_interfaces_xml(rec)

        try:
            with open(template_filename) as f:
                template = Template(f.read())
                xml  = template.substitute(name=name, xid=xid, interfaces=interfaces, arch=arch)
        except IOError:
            logger.log('Failed to parse or use XML template file {}'.format(template_filename))
            return

        # Lookup for the sliver before actually
        # defining it, just in case it was already defined.
        try:
            dom = conn.lookupByName(name)
        except:
            dom = conn.defineXML(xml)
        logger.verbose('lxc_create: {} -> {}'.format(name, Sliver_Libvirt.dom_details(dom)))
def stopService():
    if not os.path.exists("/etc/init.d/codemux"): return
    if isRunning():
        logger.log("codemux:  Stopping codemux service")
        logger.log_call(["/etc/init.d/codemux", "stop", ])
    logger.log_call(["/sbin/chkconfig", "codemux", "off"])
def GetSlivers(data, config=None, plc=None):

    if 'slivers' not in data:
        logger.log_missing_data("interfaces.GetSlivers", 'slivers')
        return

    for sliver in data['slivers']:
        slicename = sliver['name']

        if not os.path.exists("/vservers/%s" % slicename):
            # Avoid creating slice directory if slice does not exist, as it
            # breaks slice creation when sliver_lxc eventually gets around
            # to creating the sliver.
            logger.log("vserver %s does not exist yet. Skipping interfaces." % slicename)
            continue

        for tag in sliver['attributes']:
            if tag['tagname'] == 'interface':
                interfaces = eval(tag['value'])

                if not isinstance(interfaces, (list, tuple)):
                    # if interface is not a list, then make it into a singleton list
                    interfaces = [interfaces]

                for mydict in interfaces:
                    contents=""
                    # First look for filename/url combination for custom config files
                    if 'filename' in mydict and 'url' in mydict:
                        dest = "/vservers/%s/%s" % (slicename, mydict['filename'])
                        url = mydict['url']
                        try:
                            contents = curlwrapper.retrieve(url)
                        except xmlrpc.client.ProtocolError as e:
                            logger.log('interfaces (%s): failed to retrieve %s' % (slicename, url))
                            continue
                    else:
                        # Otherwise generate /etc/sysconfig/network-scripts/ifcfg-<device>
                        try:
                            dest = "/vservers/%s/etc/sysconfig/network-scripts/ifcfg-%s" % (slicename, mydict['DEVICE'])
                        except:
                            logger.log('interfaces (%s): no DEVICE specified' % slicename)
                            continue

                        for key, value in list(mydict.items()):
                            if key in ['bridge', 'vlan']:
                                continue
                            contents += '%s="%s"\n' % (key, value)

                    if sha(contents).digest() == checksum(dest):
                        logger.log('interfaces (%s): no changes to %s' % (slicename, dest))
                        continue

                    logger.log('interfaces (%s): installing file %s' % (slicename, dest))
                    try:
                        os.makedirs(os.path.dirname(dest))
                    except OSError:
                        pass

                    try:
                        f = open (dest, "w")
                        f.write(contents)
                        f.close()
                    except:
                        logger.log('interfaces (%s): error writing file %s' % (slicename, dest))
                        continue

                    # TD: Call lxcsu with '-r'. Otherwise, setns.drop_caps() would remove then required CAP_NET_ADMIN capability!
                    result = logger.log_call(['/usr/sbin/lxcsu', '-r', slicename, '/sbin/service', 'network', 'restart'])
                    if not result:
                        logger.log('interfaces (%s): error restarting network service' % slicename)
Example #28
0
 def debug_box(self,message,slicename=None):
     if reservation.debug:
         logger.log ('reservation: '+message)
         logger.log_call( ['/usr/sbin/vserver-stat', ] )
         if slicename:
             logger.log_call ( ['/usr/sbin/vserver',slicename,'status', ])
Example #29
0
def stopService():
    if not os.path.exists("/etc/init.d/codemux"): return
    if isRunning():
        logger.log("codemux:  Stopping codemux service")
        logger.log_call(["/etc/init.d/codemux", "stop", ])
    logger.log_call(["/sbin/chkconfig", "codemux", "off"])
Example #30
0
    def destroy(name): logger.log_call(['/usr/sbin/userdel', '-r', name, ])

    def is_running(self):
Example #31
0
def create_lxc(name, rec=None):
        ''' Create dirs, copy fs image, creat_lxc '''
        logger.verbose ('sliver_lxc: %s create'%(name))
        conn = libvirt.open("lxc://")
       
	try: 
            p = conn.lookupByName(name)
            logger.log("create_lxc: there is already a running vm %s!"%(name))
            return
	except:
            logger.log("create a new sliver %s"%(name))
		#return

        # Get the type of image from vref myplc tags specified as:
        # pldistro = lxc
        # fcdistro = squeeze
        # arch x86_64

        arch = 'x86_64'
        #tags = rec['rspec']['tags']
        #if 'arch' in tags:
        #    arch = tags['arch']
        #    if arch == 'i386':
        #        arch = 'i686'

        vref = "lxc-f18-x86_64"
	#vref = rec['vref']
        #if vref is None:
        #    vref = "lxc-f14-x86_64"
        #    logger.log("sliver_libvirt: %s: WARNING - no vref attached, using hard-wired default %s" % (name,vref))

        refImgDir    = os.path.join('/vservers/.lvref', vref)
        containerDir = os.path.join('/vservers', name)

        # check the template exists -- there's probably a better way..
        if not os.path.isdir(refImgDir):
            logger.log('creat_lxc: %s: ERROR Could not create sliver - reference image %s not found' % (name,vref))
            logger.log('creat_lxc: %s: ERROR Expected reference image in %s'%(name,refImgDir))
            return

        # Snapshot the reference image fs (assume the reference image is in its own
        # subvolume)
        command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
        if not logger.log_call(command, timeout=15*60):
            logger.log('creat_lxc: ERROR Could not create BTRFS snapshot at', containerDir)
            return
        command = ['chmod', '755', containerDir]
        logger.log_call(command, timeout=15*60)

        # TODO: set quotas...

        # Set hostname. A valid hostname cannot have '_'
        #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
        #    print >>f, name.replace('_', '-')

        # Add slices group if not already present
        try:
            group = grp.getgrnam('slices')
        except:
            command = ['/usr/sbin/groupadd', 'slices']
            logger.log_call(command, timeout=15*60)

        # Add unix account (TYPE is specified in the subclass)
        command = ['/usr/sbin/useradd', '-g', 'slices', '-s', '/usr/sbin/vsh', name, '-p', '*']
        logger.log_call(command, timeout=15*60)
        command = ['mkdir', '/home/%s/.ssh'%name]
        logger.log_call(command, timeout=15*60)

        # Create PK pair keys to connect from the host to the guest without
        # password... maybe remove the need for authentication inside the
        # guest?
        command = ['su', '-s', '/bin/bash', '-c', 'ssh-keygen -t rsa -N "" -f /home/%s/.ssh/id_rsa'%(name)]
        logger.log_call(command, timeout=60)

        command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name]
        logger.log_call(command, timeout=30)

        command = ['mkdir', '%s/root/.ssh'%containerDir]
        logger.log_call(command, timeout=10)

        command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
        logger.log_call(command, timeout=30)

        logger.log("creating /etc/slicename file in %s" % os.path.join(containerDir,'etc/slicename'))
        try:
            file(os.path.join(containerDir,'etc/slicename'), 'w').write(name)
        except:
            logger.log_exc("exception while creating /etc/slicename")

        try:
            file(os.path.join(containerDir,'etc/slicefamily'), 'w').write(vref)
        except:
            logger.log_exc("exception while creating /etc/slicefamily")

        uid = None
        try:
            uid = getpwnam(name).pw_uid
        except KeyError:
            # keyerror will happen if user id was not created successfully
            logger.log_exc("exception while getting user id")

        if uid is not None:
            logger.log("uid is %d" % uid)
            command = ['mkdir', '%s/home/%s' % (containerDir, name)]
            logger.log_call(command, timeout=10)
            command = ['chown', name, '%s/home/%s' % (containerDir, name)]
            logger.log_call(command, timeout=10)
            etcpasswd = os.path.join(containerDir, 'etc/passwd')
            etcgroup = os.path.join(containerDir, 'etc/group')
            if os.path.exists(etcpasswd):
                # create all accounts with gid=1001 - i.e. 'slices' like it is in the root context
                slices_gid=1001
                logger.log("adding user %(name)s id %(uid)d gid %(slices_gid)d to %(etcpasswd)s" % (locals()))
                try:
                    file(etcpasswd,'a').write("%(name)s:x:%(uid)d:%(slices_gid)d::/home/%(name)s:/bin/bash\n" % locals())
                except:
                    logger.log_exc("exception while updating %s"%etcpasswd)
                logger.log("adding group slices with gid %(slices_gid)d to %(etcgroup)s"%locals())
                try:
                    file(etcgroup,'a').write("slices:x:%(slices_gid)d\n"%locals())
                except:
                    logger.log_exc("exception while updating %s"%etcgroup)
            sudoers = os.path.join(containerDir, 'etc/sudoers')
            if os.path.exists(sudoers):
                try:
                    file(sudoers,'a').write("%s ALL=(ALL) NOPASSWD: ALL\n" % name)
                except:
                    logger.log_exc("exception while updating /etc/sudoers")

        # customizations for the user environment - root or slice uid
        # we save the whole business in /etc/planetlab.profile 
        # and source this file for both root and the slice uid's .profile
        # prompt for slice owner, + LD_PRELOAD for transparently wrap bind
        pl_profile=os.path.join(containerDir,"etc/planetlab.profile")
        ld_preload_text="""# by default, we define this setting so that calls to bind(2),
# when invoked on 0.0.0.0, get transparently redirected to the public interface of this node
# see https://svn.planet-lab.org/wiki/LxcPortForwarding"""
        usrmove_path_text="""# VM's before Features/UsrMove need /bin and /sbin in their PATH"""
        usrmove_path_code="""
pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}
pathmunge /bin after
pathmunge /sbin after
unset pathmunge
"""
        with open(pl_profile,'w') as f:
            f.write("export PS1='%s@\H \$ '\n"%(name))
            f.write("%s\n"%ld_preload_text)
            f.write("export LD_PRELOAD=/etc/planetlab/lib/bind_public.so\n")
            f.write("%s\n"%usrmove_path_text)
            f.write("%s\n"%usrmove_path_code)

        # make sure this file is sourced from both root's and slice's .profile
        enforced_line = "[ -f /etc/planetlab.profile ] && source /etc/planetlab.profile\n"
        for path in [ 'root/.profile', 'home/%s/.profile'%name ]:
            from_root=os.path.join(containerDir,path)
            # if dir is not yet existing let's forget it for now
            if not os.path.isdir(os.path.dirname(from_root)): continue
            found=False
            try: 
                contents=file(from_root).readlines()
                for content in contents:
                    if content==enforced_line: found=True
            except IOError: pass
            if not found:
                with open(from_root,"a") as user_profile:
                    user_profile.write(enforced_line)
                # in case we create the slice's .profile when writing
                if from_root.find("/home")>=0:
                    command=['chown','%s:slices'%name,from_root]
                    logger.log_call(command,timeout=5)

        # Lookup for xid and create template after the user is created so we
        # can get the correct xid based on the name of the slice
        xid = bwlimit.get_xid(name)

        # Template for libvirt sliver configuration
        template_filename_sliceimage = os.path.join('/vservers/.lvref','lxc_template.xml')
        if os.path.isfile (template_filename_sliceimage):
            logger.log("WARNING: using compat template %s"%template_filename_sliceimage)
            template_filename=template_filename_sliceimage
        else:
            logger.log("Cannot find XML template %s"%template_filename_sliceimage)
            return

        interfaces = get_interfaces_xml(rec)

        try:
            with open(template_filename) as f:
                template = Template(f.read())
                xml  = template.substitute(name=name, xid=xid, interfaces=interfaces, arch=arch)
        except IOError:
            logger.log('Failed to parse or use XML template file %s'%template_filename)
            return

        # Lookup for the sliver before actually
        # defining it, just in case it was already defined.
        try:
            dom = conn.lookupByName(name)
        except:
            dom = conn.defineXML(xml)

	def debuginfo(dom):
        	''' Helper method to get a "nice" output of the info struct for debug'''
        	[state, maxmem, mem, ncpu, cputime] = dom.info()
	        return '%s is %s, maxmem = %s, mem = %s, ncpu = %s, cputime = %s' % (dom.name(), STATES.get(state, state), maxmem, mem, ncpu, cputime)

        logger.verbose('create_lxc: %s -> %s'%(name, debuginfo(dom)))

	# the sliver has been created
	# then configure the sliver, write keys to authorized_keys file
	configure(name, rec)

	# finally, start the sliver
	dom.create()
	logger.verbose('create_lxc:%s start'%(name))

	# After the VM is started... we can play with the virtual interface
        # Create the ebtables rule to mark the packets going out from the virtual
        # interface to the actual device so the filter canmatch against the mark
        bwlimit.ebtables("-A INPUT -i veth%d -j mark --set-mark %d" % \
            (xid, xid))
 def destroy(name):
     logger.log_call([
         '/usr/sbin/userdel',
         '-r',
         name,
     ])
    def destroy(name):
        # umount .ssh directory - only if mounted
        Account.umount_ssh_dir(name)
        logger.verbose ('sliver_lxc: {} destroy'.format(name))
        conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)

        containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)

        try:
            # Destroy libvirt domain
            dom = conn.lookupByName(name)
        except:
            logger.verbose('sliver_lxc.destroy: Domain {} does not exist!'.format(name))
            return

        # Slivers with vsys running will fail the subvolume delete
        # removeSliverFromVsys return True if it stops vsys, telling us to start it again later
        vsys_stopped = removeSliverFromVsys (name)

        try:
            logger.log("sliver_lxc.destroy: destroying domain {}".format(name))
            dom.destroy()
        except:
            logger.verbose("sliver_lxc.destroy: Domain {} not running... continuing.".format(name))

        try:
            logger.log("sliver_lxc.destroy: undefining domain {}".format(name))
            dom.undefine()
        except:
            logger.verbose('sliver_lxc.destroy: Domain {} is not defined... continuing.'.format(name))

        # Remove user after destroy domain to force logout
        command = ['/usr/sbin/userdel', '-f', '-r', name]
        logger.log_call(command)

        # Remove rootfs of destroyed domain
        command = ['/usr/bin/rm', '-rf', containerDir]
        logger.log_call(command, timeout=BTRFS_TIMEOUT)

        # ???
        logger.log("-TMP-ls-l {}".format(name))
        command = ['ls', '-lR', containerDir]
        logger.log_call(command)
        logger.log("-TMP-vsys-status")
        command = ['/usr/bin/systemctl', 'status', 'vsys']
        logger.log_call(command)
        # ???

        # Remove rootfs of destroyed domain
        command = ['btrfs', 'subvolume', 'delete', containerDir]
        logger.log_call(command, timeout=BTRFS_TIMEOUT)

        # For some reason I am seeing this :
        #log_call: running command btrfs subvolume delete /vservers/inri_sl1
        #log_call: ERROR: cannot delete '/vservers/inri_sl1' - Device or resource busy
        #log_call: Delete subvolume '/vservers/inri_sl1'
        #log_call:end command (btrfs subvolume delete /vservers/inri_sl1) returned with code 1
        #
        # something must have an open handle to a file in there, but I can't find out what it is
        # the following code aims at gathering data on what is going on in the system at this point in time
        # note that some time later (typically when the sliver gets re-created) the same
        # attempt at deleting the subvolume does work
        # also lsof never shows anything relevant; this is painful..

        if not os.path.exists(containerDir):
            logger.log('sliver_lxc.destroy: {} cleanly destroyed.'.format(name))
        else:
            # we're in /
            #logger.log("-TMP-cwd {} : {}".format(name, os.getcwd()))
            # also lsof never shows anything relevant; this is painful..
            #logger.log("-TMP-lsof {}".format(name))
            #command = ['lsof']
            #logger.log_call(command)
            logger.log("-TMP-ls-l {}".format(name))
            command = ['ls', '-lR', containerDir]
            logger.log_call(command)
            logger.log("-TMP-lsof")
            command = ['lsof']
            logger.log_call(command)
            if os.path.exists(containerDir):
                logger.log('sliver_lxc.destroy: ERROR could not cleanly destroy {} - giving up'.format(name))

        if vsys_stopped:
            vsysStartService()