3 # Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
4 # based on vserver by Jacques Gelinas
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2, or (at your option)
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 # This is a script to control a virtual server
22 : ${UTIL_VSERVER_VARS:=$(dirname $0)/util-vserver-vars}
23 test -e "$UTIL_VSERVER_VARS" || {
24 echo "Can not find util-vserver installation; aborting..."
27 . "$UTIL_VSERVER_VARS"
30 USR_LIB_VSERVER=$PKGLIBDIR
31 VSERVERKILLALL_CMD=$USR_LIB_VSERVER/vserverkillall
32 DEFAULTPATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
41 mkdir -p $1/proc $1/dev/pts
42 if [ ! -d $1/proc/1 ] ; then
43 mount -t proc none $1/proc
44 mount -t devpts none $1/dev/pts
49 umount $1/proc 2>/dev/null
50 umount $1/dev/pts 2>/dev/null
53 # Check that the vservers parent directory has permission 000
54 # This is the key to avoid chroot escape
58 PERM=`$USR_LIB_VSERVER/showperm $DEFAULT_VSERVERDIR/$1/..`
59 if [ "$PERM" != 000 ] ; then
61 echo "**********************************************************"
62 echo $DEFAULT_VSERVERDIR/$1/.. has insecure permissions.
63 echo A vserver administrator may be able to visit the root server.
65 echo " " chmod 000 $DEFAULT_VSERVERDIR/$1/..
66 echo do it anytime you want, even if vservers are running.
67 echo "**********************************************************"
71 # Set the IP alias needed by a vserver
74 if [ "$NODEV" = "" -a "$IPROOT" != "" -a "$IPROOT" != "0.0.0.0" -a "$IPROOT" != "ALL" ] ;then
75 # A vserver may have more than one IP
76 # The first alias is dev:vserver
77 # and the other are dev:vserver1,2,3 and so on
78 # An IP may hold the device. The following is valid
79 # IPROOT="1.2.4.5 eth1:1.2.3.5"
81 # The first IP 1.2.3.4 will go on eth0 and the other on eth1
82 # VLAN devices are also supported (eth0.231 for vlan 231)
89 # Split the device and IP if available
92 eval `echo $oneip | tr : ' ' | (read dev ip; echo oneip=$ip; echo IPDEV=$dev)`
95 # Split the IP and the netmask if available
98 eval `echo $oneip | tr / ' ' | (read ip msk; echo oneip=$ip; echo MASK=$msk)`
99 eval `$USR_LIB_VSERVER/ifspec "" "$oneip" "$MASK" "$BCAST"`
102 if [ "$IPDEV" != "" ] ; then
105 if [ ! -f /proc/net/vlan/$IPDEV ] ; then
106 /sbin/vconfig add `echo $IPDEV | tr . ' '`
108 /sbin/ifconfig $IPDEV 127.0.0.1
112 # Compute the default netmask, if missing
113 eval `$USR_LIB_VSERVER/ifspec $IPDEV "$oneip" "$MASK" "$BCAST"`
116 #echo /sbin/ifconfig $IPDEV:$1$SUFFIX $oneip netmask $IPROOTMASK broadcast $IPROOTBCAST
117 /sbin/ifconfig $IPDEV:$1$SUFFIX $oneip netmask $IPROOTMASK broadcast $IPROOTBCAST
119 if [ "$SUFFIX" = "" ] ; then
122 SUFFIX=`expr $SUFFIX + 1`
126 if [ "$IPROOTBCAST" = "" ] ; then
127 IPROOTBCAST=255.255.255.255
130 ifconfig_iproot_off()
132 if [ "$NODEV" = "" -a "$IPROOT" != "" -a "$IPROOT" != "0.0.0.0" -a "$IPROOT" != "ALL" -a "$IPROOTDEV" != "" ] ;then
137 # Split the device and IP if available
140 eval `echo $oneip | tr : ' ' | (read dev ip; echo IPDEV=$dev)`
143 /sbin/ifconfig $IPDEV:$1$SUFFIX down 2>/dev/null
144 if [ "$SUFFIX" = "" ] ; then
147 SUFFIX=`expr $SUFFIX + 1`
152 # Split an IPROOT definition, trash the devices and
153 # compose a set of --ip option for chbind
157 if [ "$IPS" = "" ] ; then
160 if [ "$1" = "ALL" ] ; then
161 IPS=`$USR_LIB_VSERVER/listdevip`
165 # Split the device and IP if available
168 eval `echo $oneip | tr : ' ' | (read dev ip; echo oneip=$ip)`
173 # eval `echo $oneip | tr / ' ' | (read ip msk; echo oneip=$ip)`
180 # Extract the initial runlevel from the vserver inittab
183 INITDEFAULT=`grep :initdefault $DEFAULT_VSERVERDIR/$1/etc/inittab | sed 's/:/ /g' | ( read a level b; echo $level)`
186 # Read the vserver configuration file, reusing the PROFILE value
187 # found in /var/run/vservers
190 if [ -f /var/run/vservers/$1.ctx ] ; then
191 . /var/run/vservers/$1.ctx
192 if [ "$S_PROFILE" != "" ] ; then
193 export PROFILE=$S_PROFILE
197 . /etc/vservers/$1.conf
201 echo vserver [ options ] server-name command ...
203 echo server-name is a directory in $DEFAULT_VSERVERDIR
205 echo The commands are:
206 echo " build : Create a virtual server by copying the packages"
207 echo " of the root server"
208 echo " enter : Enter in the virtual server context and starts a shell"
209 echo " Same as \"vserver name exec /bin/sh\""
210 echo " exec : Exec a command in the virtual server context"
211 echo " suexec : Exec a command in the virtual server context uid"
212 echo " service : Control a service inside a vserver"
213 echo " vserver name service service-name start/stop/restart/status"
214 echo " start : Starts the various services in the vserver, runlevel 3"
215 echo " stop : Ends all services and kills the remaining processes"
216 echo " running : Tells if a virtual server is running"
217 echo " It returns proper exit code, so you can use it as a test"
218 echo " status : Tells some information about a vserver"
219 echo " chkconfig : It turns a server on or off in a vserver"
221 echo "--nodev : Do not configure the IP aliases of the vserver"
222 echo " Useful to enter a vserver without enabling its network"
223 echo " and avoiding conflicts with another copy of this vserver"
224 echo " running elsewhere"
225 echo "--silent : No informative messages about vserver context and IP numbers"
226 echo " Useful when you want to redirect the output"
238 CAPS="$CAPS --cap $f"
248 if [ "$1" = "--silent" ] ; then
251 elif [ "$1" = "--nodev" ] ; then
258 # Setup the default ulimit for a vserver
260 # File handle are limited to half of the current system limit
261 # Virtual memory is limited to the ram size
262 NFILE=`cat /proc/sys/fs/file-max`
263 NFILE=`expr $NFILE / 2`
264 VMEM=`cat /proc/meminfo | grep MemTotal | (read a b c; echo $b)`
265 # Disabled for now, we need a different to set the security
266 # context limit than fiddling with ulimit
267 #ulimit -H -n $NFILE -v $VMEM
269 if [ $# -lt 2 ] ; then
271 elif [ "$2" = "build" ] ; then
272 # Either the directory does not exist or is empty
273 NBSUB=`ls $DEFAULT_VSERVERDIR/$1 2>/dev/null | grep -v lost+found | wc -l`
275 if [ "$NBSUB" != 0 ] ; then
276 echo Virtual server $DEFAULT_VSERVERDIR/$1 already exist
278 if [ ! -d $DEFAULT_VSERVERDIR ] ; then
279 mkdir $DEFAULT_VSERVERDIR || exit 1
280 chmod 000 $DEFAULT_VSERVERDIR
281 echo Directory $DEFAULT_VSERVERDIR was created with permissions 000
283 mkdir -p $DEFAULT_VSERVERDIR/$1 || exit 1
284 chmod 755 $DEFAULT_VSERVERDIR/$1
285 if test "$UTIL_VSERVER_AVOID_COPY"; then
286 mkdir -p $DEFAULT_VSERVERDIR/$1/{etc/rc.d/init.d,sbin,var/run,var/log}
288 cp -ax /sbin /bin /etc /usr /var /lib $DEFAULT_VSERVERDIR/$1/. || exit 1
290 cd $DEFAULT_VSERVERDIR/$1 || exit 1
292 rm -f var/spool/mail/*
293 rm -f `find var/run -type f`
294 rm -f `find var/log -type f`
296 rm -f var/lock/subsys/*
297 rm -f etc/cron.d/kmod
298 mkdir proc tmp home root boot
299 test -f /root/.bashrc && cp -a /root/.bashrc root/.
300 test -f /root/.bash_profile && cp -a /root/.bash_profile root/.
303 # Create a minimal dev so the virtual server can't grab
306 vserver_mknod dev/null c 1 3 666
307 vserver_mknod dev/zero c 1 5 666
308 vserver_mknod dev/full c 1 7 666
309 vserver_mknod dev/random c 1 8 644
310 vserver_mknod dev/urandom c 1 9 644
311 vserver_mknod dev/tty c 5 0 666
312 vserver_mknod dev/ptmx c 5 2 666
314 # Turn off some service useless on a vserver
315 # vserver_turnoff apmd network autofs dhcpd gpm ipchains iptables \
316 # irda isdn keytable kudzu linuxconf-setup netfs nfs nfslock \
317 # pcmcia portmap pppoe random rawdevices rhnsd rstatd ruserd \
318 # rwalld rwhod sendmail smb snmpd v_httpd h_xinetd v_sshd vservers \
321 cd etc/init.d 2>/dev/null || cd etc/rc.d/init.d
325 *.bak|*~|functions|killall|halt|single)
328 #$USR_LIB_VSERVER/capchroot $DEFAULT_VSERVERDIR/$1 /sbin/chkconfig --level 2345 $serv off
329 $0 --silent $1 chkconfig --level 2345 $serv off
334 rm -f etc/rc.d/rc6.d/S*reboot
335 # Create a dummy /etc/fstab and /etc/mtab to please
336 # df and linuxconf. We use hdv1, which does not exist
337 # to remind the admin that it is not the real drive
338 echo /dev/hdv1 / ext2 defaults 1 1 >etc/fstab
339 echo /dev/hdv1 / ext2 rw 0 0 >etc/mtab
340 # Install the vreboot utility
341 cp -a $USR_LIB_VSERVER/vreboot sbin/.
342 ln -sf vreboot sbin/vhalt
344 echo Directory $DEFAULT_VSERVERDIR/$1 has been populated
345 if [ ! -d /etc/vservers ] ; then
347 chmod 600 /etc/vservers
348 echo Directory /etc/vservers has been created
350 if [ ! -f /etc/vservers/$1.conf ] ; then
351 CONF=/etc/vservers/$1.conf
353 if [ "$PROFILE" = "" ] ; then
356 # Select the IP number assigned to the virtual server
357 # This IP must be one IP of the server, either an interface
359 # A vserver may have more than one IP. Separate them with spaces.
360 # do not forget double quotes.
362 # IPROOT="1.2.3.4 2.3.4.5"
363 # IPROOT="eth0:1.2.3.4 eth1:2.3.4.5"
364 # If the device is not specified, IPROOTDEV is used
368 # The netmask and broadcast are computed by default from IPROOTDEV
371 # You can define on which device the IP alias will be done
372 # The IP alias will be set when the server is started and unset
373 # when the server is stopped
375 # You can set a different host name for the vserver
376 # If empty, the host name of the main server is used
387 # Uncomment the onboot line if you want to enable this
388 # virtual server at boot time
390 # You can set a different NIS domain for the vserver
391 # If empty, the current on is kept
392 # Set it to "none" to have no NIS domain set
394 # You can set the priority level (nice) of all process in the vserver
395 # Even root won't be able to raise it
397 # You can set various flags for the new security context
398 # lock: Prevent the vserver from setting new security context
399 # sched: Merge scheduler priority of all processes in the vserver
400 # so that it acts a like a single one.
401 # nproc: Limit the number of processes in the vserver according to ulimit
402 # (instead of a per user limit, this becomes a per vserver limit)
403 # private: No other process can join this security context. Even root
404 # Do not forget the quotes around the flags
406 # You can set various ulimit flags and they will be inherited by the
407 # vserver. You enter here various command line argument of ulimit
408 # ULIMIT="-HS -u 200"
409 # The example above, combined with the nproc S_FLAGS will limit the
410 # vserver to a maximum of 200 processes
412 # You can set various capabilities. By default, the vserver are run
413 # with a limited set, so you can let root run in a vserver and not
414 # worry about it. He can't take over the machine. In some cases
415 # you can to give a little more capabilities (such as CAP_NET_RAW)
416 # S_CAPS="CAP_NET_RAW"
418 # Select an unused context (this is optional)
419 # The default is to allocate a free context on the fly
420 # In general you don't need to force a context
423 echo $CONF has been created. Look at it\!
426 elif [ ! -f /etc/vservers/$1.conf ] ; then
427 echo No configuration for this vserver: /etc/vservers/$1.conf
429 elif [ ! -d $DEFAULT_VSERVERDIR/$1/. ] ; then
430 echo No directory for this vserver: $DEFAULT_VSERVERDIR/$1
432 elif [ "$2" = "start" ] ; then
433 echo Starting the virtual server $1
437 test -x /etc/vservers/$1.sh && /etc/vservers/$1.sh pre-start $1
444 . /etc/vservers/$1.conf
447 cd $DEFAULT_VSERVERDIR/$1 || exit 1
449 if [ "$PROFILE" != "" ] ; then
450 echo export PROFILE=$PROFILE >etc/PROFILE
453 rm -f `find var/run -type f`
455 chgrp ${UTMP_GROUP:-utmp} var/run/utmp
456 chmod 0664 var/run/utmp
457 rm -f var/lock/subsys/*
458 mountproc $DEFAULT_VSERVERDIR/$1
466 STARTCMD="/etc/rc.d/rc $INITDEFAULT"
467 if [ -x $DEFAULT_VSERVERDIR/$1/etc/init.d/rc ] ; then
468 STARTCMD="/etc/init.d/rc $INITDEFAULT"
469 elif [ -x $DEFAULT_VSERVERDIR/$1/usr/bin/emerge ] ; then
470 STARTCMD="/sbin/rc default"
475 for f in $S_FLAGS dummy
483 FLAGS="$FLAGS --flag fakeinit"
484 STARTCMD=/sbin/minit-start
485 DISCONNECT=--disconnect
490 FLAGS="$FLAGS --flag $f"
492 DISCONNECT=--disconnect
495 FLAGS="$FLAGS --flag $f"
499 if [ "$FAKEINIT" = "" ] ; then
500 $USR_LIB_VSERVER/fakerunlevel $INITDEFAULT var/run/utmp
503 calculateCaps $S_CAPS
505 if [ "$S_CONTEXT" != "" ] ; then
506 CTXOPT="--ctx $S_CONTEXT"
508 if [ "$S_HOSTNAME" != "" ] ; then
509 HOSTOPT="--hostname $S_HOSTNAME"
510 export HOSTNAME=$S_HOSTNAME
512 if [ "$S_DOMAINNAME" != "" ] ; then
513 DOMAINOPT="--domainname $S_DOMAINNAME"
515 if [ "$S_NICE" != "" ] ; then
516 NICECMD="nice -$S_NICE"
518 mkdir -p /var/run/vservers
519 chmod 700 /var/run/vservers
521 if [ "$ULIMIT" != "" ] ; then
526 # We switch to /vservers/$1 now, because after the
527 # security context switch /vservers directory becomes a dead zone.
528 cd $DEFAULT_VSERVERDIR/$1
529 IPOPT=`setipopt $IPROOT`
530 export PATH=$DEFAULTPATH
531 $NICECMD $_CHBIND $SILENT $IPOPT --bcast $IPROOTBCAST \
532 $_CHCONTEXT $SILENT $DISCONNECT $CAPS $FLAGS $CTXOPT $HOSTOPT $DOMAINOPT --secure \
533 $_SAVE_S_CONTEXT /var/run/vservers/$1.ctx \
534 $_CAPCHROOT $CHROOTOPT . $STARTCMD
536 test -x /etc/vservers/$1.sh && /etc/vservers/$1.sh post-start $1
538 elif [ "$2" = "running" ] ; then
539 if [ ! -f /var/run/vservers/$1.ctx ] ; then
540 echo Server $1 is not running
543 . /var/run/vservers/$1.ctx
544 NB=$($USR_SBIN/vps ax | awk '{print $2}' | grep \^$S_CONTEXT\$ | wc -l)
545 #NB=`$_CHCONTEXT --silent --ctx $S_CONTEXT ps ax | wc -l`
546 #NB=`eval expr $NB + 0`
547 if [ "$NB" -gt 0 ] ; then
548 echo Server $1 is running
551 echo Server $1 is not running
555 elif [ "$2" = "status" ] ; then
558 . /var/run/vservers/$1.ctx
559 NB=$($USR_SBIN/vps ax | awk '{print $2}' | grep \^$S_CONTEXT\$ | wc -l)
560 echo $NB processes running
561 echo Vserver uptime: `$USR_LIB_VSERVER/filetime /var/run/vservers/$1.ctx`
563 elif [ "$2" = "stop" ] ; then
564 echo Stopping the virtual server $1
574 test -x /etc/vservers/$1.sh && /etc/vservers/$1.sh pre-stop $1
576 cd $DEFAULT_VSERVERDIR/$1
577 mountproc $DEFAULT_VSERVERDIR/$1
578 # The fakeinit flag tell us how to turn off the server
580 export PREVLEVEL=$INITDEFAULT
581 STOPCMD="/etc/rc.d/rc 6"
582 if [ -x $DEFAULT_VSERVERDIR/$1/etc/init.d/rc ] ; then
583 STOPCMD="/etc/init.d/rc 6"
584 elif [ -x $DEFAULT_VSERVERDIR/$1/usr/bin/emerge ] ; then
585 STOPCMD="/sbin/rc shutdown"
588 for f in $S_FLAGS dummy
593 FLAGS="$FLAGS --flag fakeinit"
594 STOPCMD="/sbin/minit-stop"
598 FLAGS="$FLAGS --flag $f"
599 STOPCMD="/sbin/init 6"
606 calculateCaps $S_CAPS
608 cd $DEFAULT_VSERVERDIR/$1
609 IPOPT=`setipopt $IPROOT`
610 export PATH=$DEFAULTPATH
611 $_CHBIND $SILENT $IPOPT --bcast $IPROOTBCAST \
612 $_CHCONTEXT $SILENT $CAPS --secure --ctx $S_CONTEXT \
613 $_CAPCHROOT . $STOPCMD
615 if test "$IS_MINIT"; then
616 echo "Waiting for minit finish-signal"
617 dd if=var/run/minit-stop of=/dev/zero bs=1 count=1 &>/dev/null
620 echo sleeping 5 seconds
624 echo Killing all processes
625 $_CHBIND --silent $IPOPT --bcast $IPROOTBCAST \
626 $_CHCONTEXT $CAPS --secure --silent --ctx $S_CONTEXT \
629 # We umount anyway, because "enter" establish the mount
630 # but when you exit, the server is considered not running
631 umountproc $DEFAULT_VSERVERDIR/$1
633 test -x /etc/vservers/$1.sh && /etc/vservers/$1.sh post-stop $1
634 ifconfig_iproot_off $1
635 elif [ "$2" = "restart" ] ; then
641 elif [ "$2" = "suexec" ] ; then
642 if [ -z "$3" ] ; then
643 echo "Missing user!" >&2
644 echo "vserver vserver-name suexec user command [ args ... ]" >&2
646 elif [ -z "$4" ] ; then
647 echo "Missing command and arguments!" >&2
648 echo "vserver vserver-name suexec user command [ args ... ]" >&2
656 . /etc/vservers/$1.conf
657 cd $DEFAULT_VSERVERDIR/$1
659 mountproc $DEFAULT_VSERVERDIR/$1
660 PS1="[\u@vserver:$1 \W]"
666 for f in $S_CAPS dummy
675 CAPS="$CAPS --cap $f"
680 for f in $S_FLAGS dummy
684 FLAGS="$FLAGS --flag fakeinit"
690 FLAGS="$FLAGS --flag $f"
695 if [ "$ULIMIT" != "" ] ; then
698 if $0 $VSERVER running >/dev/null
700 . /var/run/vservers/$VSERVER.ctx
701 cd $DEFAULT_VSERVERDIR/$VSERVER
702 IPOPT=`setipopt $IPROOT`
703 export PATH=$DEFAULTPATH
704 $_CHBIND $SILENT $IPOPT --bcast $IPROOTBCAST \
705 $_CHCONTEXT $SILENT $FLAGS $CAPS --secure --ctx $S_CONTEXT \
706 $_CAPCHROOT --suid $USERID . "$@"
708 test -x /etc/vservers/$1.sh && /etc/vservers/$1.sh pre-start $1
712 if [ "$S_CONTEXT" != "" ] ; then
713 CTXOPT="--ctx $S_CONTEXT"
715 if [ "$S_HOSTNAME" != "" ] ; then
716 HOSTOPT="--hostname $S_HOSTNAME"
717 export HOSTNAME=$S_HOSTNAME
719 if [ "$S_DOMAINNAME" != "" ] ; then
720 DOMAINOPT="--domainname $S_DOMAINNAME"
722 mkdir -p /var/run/vservers
723 cd $DEFAULT_VSERVERDIR/$VSERVER
724 IPOPT=`setipopt $IPROOT`
725 export PATH=$DEFAULTPATH
726 $_CHBIND $SILENT $IPOPT --bcast $IPROOTBCAST \
727 $_CHCONTEXT $SILENT $FLAGS $CAPS --secure $CTXOPT $HOSTOPT $DOMAINOPT \
728 $_SAVE_S_CONTEXT /var/run/vservers/$VSERVER.ctx \
729 $_CAPCHROOT --suid $USERID $CHROOTOPT . "$@"
732 elif [ "$2" = "exec" ] ; then
735 exec $0 $NODEV $SILENT $VSERV suexec root "$@"
736 elif [ "$2" = "enter" ] ; then
738 exec $0 $NODEV $SILENT $1 exec /bin/bash -login
739 elif [ "$2" = "service" ] ; then
743 exec $0 $NODEV $SILENT $VSERVER exec /sbin/service "$@"
744 elif [ "$2" = "chkconfig" ] ; then
748 if [ "$1" = "--level" ] ; then
753 if [ $# != 2 -a ! -x $DEFAULT_VSERVERDIR/$VSERVER/sbin/chkconfig ] ; then
754 echo Invalid argument, expected vserver name chkconfig [ --level nnn ] service on\|off
755 elif [ -x $DEFAULT_VSERVERDIR/$VSERVER/sbin/chkconfig ] ; then
756 exec $0 --silent $VSERVER exec /sbin/chkconfig "$@"
757 elif [ -x $DEFAULT_VSERVERDIR/$VSERVER/usr/sbin/update-rc.d ] ; then
758 if [ "$2" = "on" -o "$2" = "start" ] ; then
759 $0 --silent $VSERVER exec /usr/sbin/update-rc.d -f $1 remove >/dev/null
760 exec $0 --silent $VSERVER exec /usr/sbin/update-rc.d $1 start 80 2 3 4 5 . stop 20 0 1 6 . >/dev/null
761 elif [ "$2" = "off" -o "$2" = "stop" ] ; then
762 $0 --silent $VSERVER exec /usr/sbin/update-rc.d -f $1 remove >/dev/null
763 exec $0 --silent $VSERVER exec /usr/sbin/update-rc.d $1 stop 20 0 1 2 3 4 5 6 . >/dev/null
765 echo vserver chkconfig: Expecting on or off
768 echo chkconfig functionality is not available on this
769 echo vserver distribution.
770 echo Looked for /sbin/chkconfig and /usr/sbin/update-rc.d
773 echo Command unknown $2