templates/lxc-oracle.in

   1 #!/bin/sh
   2 #
   3 # Template script for generating Oracle Enterprise Linux container for LXC
   4 # based on lxc-fedora, lxc-ubuntu
   5 #
   6 # Copyright © 2011 Wim Coekaerts <wim.coekaerts@oracle.com>
   7 # Copyright © 2012 Dwight Engen <dwight.engen@oracle.com>
   8 #
   9 # Modified for Oracle Linux 5
  10 # Wim Coekaerts <wim.coekaerts@oracle.com>
  11 #
  12 # Modified for Oracle Linux 6,7 combined OL4,5,6 into one template script
  13 # Dwight Engen <dwight.engen@oracle.com>
  14 #
  15 # This library is free software; you can redistribute it and/or
  16 # modify it under the terms of the GNU Lesser General Public
  17 # License as published by the Free Software Foundation; either
  18 # version 2.1 of the License, or (at your option) any later version.
  19 #
  20 # This library is distributed in the hope that it will be useful,
  21 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23 # Lesser General Public License for more details.
  24 #
  25 # You should have received a copy of the GNU Lesser General Public
  26 # License along with this library; if not, write to the Free Software
  27 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  28 #
  29
  30 # Detect use under userns (unsupported)
  31 for arg in "$@"; do
  32     [ "$arg" = "--" ] && break
  33     if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
  34         echo "This template can't be used for unprivileged containers." 1>&2
  35         echo "You may want to try the \"download\" template instead." 1>&2
  36         exit 1
  37     fi
  38 done
  39
  40 # Make sure the usual locations are in PATH
  41 export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
  42
  43 # use virbr0 that is setup by default by libvirtd
  44 lxc_network_type=veth
  45 lxc_network_link=virbr0
  46
  47 die()
  48 {
  49     echo "failed: $1"
  50     exit 1
  51 }
  52
  53 is_btrfs_subvolume()
  54 {
  55     if which btrfs >/dev/null 2>&1 && \
  56        btrfs subvolume list "$1" >/dev/null 2>&1; then
  57         return 0
  58     fi
  59     return 1
  60 }
  61
  62 can_chcon()
  63 {
  64     if which chcon >/dev/null 2>&1; then
  65         selinuxenabled >/dev/null 2>&1
  66         return $?
  67     fi
  68     return 1
  69 }
  70
  71 # fix up the container_rootfs
  72 container_rootfs_patch()
  73 {
  74     echo "Patching container rootfs $container_rootfs for Oracle Linux $container_release_major.$container_release_minor"
  75
  76     # copy ourself into the container to be used to --patch the rootfs when
  77     # yum update on certain packages is done. we do this here instead of in
  78     # container_rootfs_configure() in case the patching done in this function
  79     # is updated in the future, we can inject the updated version of ourself
  80     # into older containers.
  81     if [ $container_rootfs != "/" ]; then
  82         cp -f `readlink -f $0` $container_rootfs/usr/bin/lxc-patch
  83         if [ $container_release_major -lt "6" ]; then
  84             mkdir -p $container_rootfs/usr/lib/yum-plugins
  85             cp @DATADIR@/lxc/lxc-patch.py $container_rootfs/usr/lib/yum-plugins
  86         fi
  87         if [ $container_release_major -ge "6" ]; then
  88             mkdir -p $container_rootfs/usr/share/yum-plugins
  89             cp @DATADIR@/lxc/lxc-patch.py $container_rootfs/usr/share/yum-plugins
  90         fi
  91         mkdir -p $container_rootfs/etc/yum/pluginconf.d
  92         cat <<EOF > $container_rootfs/etc/yum/pluginconf.d/lxc-patch.conf
  93 [main]
  94 enabled=1
  95 packages=dbus,initscripts,iptables,openssh-server,setup,selinux-policy,readahead,udev,util-linux,util-linux-ng
  96 EOF
  97     fi
  98
  99     if [ $container_release_major = "4" ]; then
 100         # yum plugin type of TYPE_INTERFACE works in all releases but gives a
 101         # deprecation warning on major > 4, so we default to TYPE_INTERACTIVE
 102         # and fix it up here
 103         sed -i 's|TYPE_INTERACTIVE|TYPE_INTERFACE|' $container_rootfs/usr/lib/yum-plugins/lxc-patch.py
 104         if [ -f $container_rootfs/etc/yum.repos.d/ULN-Base.repo ]; then
 105             mv $container_rootfs/etc/yum.repos.d/ULN-Base.repo \
 106                $container_rootfs/etc/yum.repos.d/ULN-Base.repo.lxc-disabled
 107         fi
 108         echo "plugins = 1" >>$container_rootfs/etc/yum.conf
 109     fi
 110
 111     # "disable" selinux in the guest. The policy in the container isn't
 112     # likely to match the hosts (unless host == guest exactly) and the
 113     # kernel can only be enforcing one policy.
 114     #
 115     # The OL 5 init honors /etc/selinux/config, but note that
 116     # this doesnt actually disable it if it's enabled in the host, since
 117     # libselinux::is_selinux_enabled() in the guest will check
 118     # /proc/filesystems and see selinuxfs, thus reporting that it is on
 119     # (ie. check the output of sestatus in the guest). We also replace
 120     # /usr/sbin/selinuxenabled with a symlink to /bin/false so that init
 121     # scripts (ie. mcstransd) that call that think selinux is disabled.
 122     mkdir -p $container_rootfs/selinux
 123     echo 0 > $container_rootfs/selinux/enforce
 124     if [ -e $container_rootfs/etc/selinux/config ]; then
 125         sed -i 's|SELINUX=enforcing|SELINUX=disabled|' $container_rootfs/etc/selinux/config
 126     else
 127         mkdir -p $container_rootfs/etc/selinux
 128         echo "SELINUX=disabled" >$container_rootfs/etc/selinux/config
 129     fi
 130     sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*close|#session required pam_selinux.so close|' $container_rootfs/etc/pam.d/login
 131     sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*open|#session required pam_selinux.so open|' $container_rootfs/etc/pam.d/login
 132     sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*close|#session required pam_selinux.so close|' $container_rootfs/etc/pam.d/sshd
 133     sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*open|#session required pam_selinux.so open|' $container_rootfs/etc/pam.d/sshd
 134
 135     # setting /proc/$$/loginuid doesn't work under user namespace, which
 136     # prevents logins from working
 137     sed -i 's|session[ \t]*required[ \t]*pam_loginuid.so|#session required pam_loginuid.so|' $container_rootfs/etc/pam.d/sshd
 138     sed -i 's|session[ \t]*required[ \t]*pam_loginuid.so|#session required pam_loginuid.so|' $container_rootfs/etc/pam.d/login
 139
 140     if [ -f $container_rootfs/usr/sbin/selinuxenabled ]; then
 141         mv $container_rootfs/usr/sbin/selinuxenabled $container_rootfs/usr/sbin/selinuxenabled.lxcorig
 142         ln -s /bin/false $container_rootfs/usr/sbin/selinuxenabled
 143     fi
 144
 145     # ensure /dev/ptmx refers to the newinstance devpts of the container, or
 146     # pty's will get crossed up with the hosts (https://lkml.org/lkml/2012/1/23/512)
 147     rm -f $container_rootfs/dev/ptmx
 148     ln -s pts/ptmx $container_rootfs/dev/ptmx
 149
 150     # OL7 has systemd, no rc.sysinit
 151     if [ $container_release_major = "7" ]; then
 152         # from mhw in the fedora template: We do need to disable the
 153         # "ConditionalPathExists=/dev/tty0" line or no gettys are started on
 154         # the ttys in the container. Lets do it in an override copy of the
 155         # service so it can still pass rpm verifies and not be automatically
 156         # updated by a new systemd version.
 157         sed -e 's/^ConditionPathExists=/#LXC ConditionPathExists=/' \
 158             < $container_rootfs/usr/lib/systemd/system/getty\@.service \
 159             > $container_rootfs/etc/systemd/system/getty\@.service
 160         # Setup getty service on the 4 ttys we are going to allow in the
 161         # default config.  Number should match lxc.tty
 162         ( cd $container_rootfs/etc/systemd/system/getty.target.wants
 163             for i in 1 2 3 4 ; do ln -sf ../getty\@.service getty@tty${i}.service; done )
 164         # We only want to spawn a getty on /dev/console in lxc, libvirt-lxc
 165         # symlinks /dev/console to /dev/tty1
 166         sed -i '/Before=getty.target/a ConditionVirtualization=lxc' $container_rootfs/usr/lib/systemd/system/console-getty.service
 167
 168         # disable some systemd services, set default boot, sigpwr target
 169         rm -f $container_rootfs/usr/lib/systemd/system/sysinit.target.wants/kmod-static-nodes.service
 170         chroot $container_rootfs systemctl -q disable graphical.target
 171         chroot $container_rootfs systemctl -q enable multi-user.target
 172         if [ ! -e $container_rootfs/etc/systemd/system/sigpwr.target ]; then
 173             chroot $container_rootfs ln -s /usr/lib/systemd/system/halt.target /etc/systemd/system/sigpwr.target
 174         fi
 175
 176         # systemd in userns won't be able to set /proc/self/oom_score_adj which
 177         # prevents the dbus service from starting
 178         sed -i 's|^OOMScoreAdjust|#LXC OOMScoreAdjust|' $container_rootfs/usr/lib/systemd/system/dbus.service
 179         return
 180     fi
 181
 182     # silence error in checking for selinux
 183     sed -i 's|cat /proc/self/attr/current|cat /proc/self/attr/current 2>/dev/null|' $container_rootfs/etc/rc.sysinit
 184     sed -i 's|cat /proc/self/attr/current|cat /proc/self/attr/current 2>/dev/null|' $container_rootfs/etc/rc.d/rc.sysinit
 185
 186     # on ol4 pam_limits prevents logins when using user namespaces
 187     if [ $container_release_major = "4" ]; then
 188         sed -i 's|session[ \t]*required[ \t]*/lib/security/\$ISA/pam_limits.so|#session required /lib/security/$ISA/pam_limits.so|' $container_rootfs/etc/pam.d/system-auth
 189     fi
 190
 191     # avoid error in ol5 attempting to copy non-existent resolv.conf
 192     if [ $container_release_major = "5" ]; then
 193         sed -i 's|resolv.conf.predhclient|resolv.conf.predhclient 2>/dev/null|' $container_rootfs/sbin/dhclient-script
 194     fi
 195
 196     # disable interactive ovmd asking questions
 197     if [ -f $container_rootfs/etc/sysconfig/ovmd ]; then
 198         sed -i 's|INITIAL_CONFIG=yes|INITIAL_CONFIG=no|' $container_rootfs/etc/sysconfig/ovmd
 199     fi
 200
 201     # disable disabling of ipv4 forwarding and defrag on shutdown since
 202     # we mount /proc/sys ro
 203     if [ $container_release_major = "5" ]; then
 204         sed -i 's|-f /proc/sys/net/ipv4/ip_forward|-w /proc/sys/net/ipv4/ip_forward|' $container_rootfs/etc/rc.d/init.d/network
 205         sed -i 's|-f /proc/sys/net/ipv4/ip_always_defrag|-w /proc/sys/net/ipv4/ip_always_defrag|' $container_rootfs/etc/rc.d/init.d/network
 206     fi
 207
 208     # disable ipv6 on ol6
 209     rm -f $container_rootfs/etc/sysconfig/network-scripts/init.ipv6-global
 210
 211     # remove module stuff for iptables it just shows errors that are not
 212     # relevant in a container
 213     if [ -f "$container_rootfs/etc/sysconfig/iptables-config" ]; then
 214         sed -i 's|IPTABLES_MODULES=".*|IPTABLES_MODULES=""|' $container_rootfs/etc/sysconfig/iptables-config
 215         sed -i 's|IPTABLES_MODULES_UNLOAD=".*|IPTABLES_MODULES_UNLOAD="no"|' $container_rootfs/etc/sysconfig/iptables-config
 216     fi
 217
 218     # disable readahead in the container
 219     if [ $container_release_major = "6" -a -e $container_rootfs/etc/sysconfig/readahead ]; then
 220         rm -f $container_rootfs/etc/init/readahead-collector.conf
 221         rm -f $container_rootfs/etc/init/readahead-disable-services.conf
 222         sed -i 's|READAHEAD="yes"|READAHEAD="no"|' $container_rootfs/etc/sysconfig/readahead
 223     fi
 224
 225     if [ $container_release_major = "4" ]; then
 226         # enable fastboot always
 227         sed -i 's|\[ -f /fastboot \]|/bin/true|' $container_rootfs/etc/rc.sysinit
 228         sed -i 's|\[ -f /fastboot \]|/bin/true|' $container_rootfs/etc/rc.d/rc.sysinit
 229
 230         # dont attempt to set kernel parameters
 231         sed -i 's|action $"Configuring kernel parameters|# LXC action $"Configuring kernel parameters|' $container_rootfs/etc/rc.sysinit
 232         sed -i 's|action $"Configuring kernel parameters|# LXC action $"Configuring kernel parameters|' $container_rootfs/etc/rc.d/rc.sysinit
 233         sed -i 's|action $"Setting network parameters|# LXC action $"Setting network parameters|' $container_rootfs/etc/init.d/network 2>/dev/null
 234         sed -i 's|action $"Setting network parameters|# LXC action $"Setting network parameters|' $container_rootfs/etc/init.d/NetworkManager 2>/dev/null
 235     fi
 236
 237     # no need to attempt to mount /
 238     sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.sysinit
 239     sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.d/rc.sysinit
 240     sed -i 's|action \$"Remounting root filesystem|/bin/true # LXC action $"Remounting root filesystem|' $container_rootfs/etc/rc.sysinit
 241     sed -i 's|action \$"Remounting root filesystem|/bin/true # LXC action $"Remounting root filesystem|' $container_rootfs/etc/rc.d/rc.sysinit
 242
 243     # disable udev in the container
 244     if [ $container_release_major = "4" ]; then
 245         sed -i 's|\[ -x /sbin/start_udev \]|# LXC no udev|' $container_rootfs/etc/rc.sysinit
 246         sed -i 's|\[ -x /sbin/start_udev \]|# LXC no udev|' $container_rootfs/etc/rc.d/rc.sysinit
 247     else
 248         sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.sysinit
 249         sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.d/rc.sysinit
 250     fi
 251
 252     # disable nash raidautorun in the container since no /dev/md*
 253     if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
 254         sed -i 's|echo "raidautorun /dev/md0"|echo ""|' $container_rootfs/etc/rc.sysinit
 255         sed -i 's|echo "raidautorun /dev/md0"|echo ""|' $container_rootfs/etc/rc.d/rc.sysinit
 256     fi
 257
 258     # prevent rc.sysinit from attempting to loadkeys
 259     if [ \( $container_release_major = "4" -o $container_release_major = "5" \) -a -e $container_rootfs/etc/sysconfig/keyboard ]; then
 260         rm $container_rootfs/etc/sysconfig/keyboard
 261     fi
 262
 263     # dont use the hwclock, it messes up the host's time
 264     if [ $container_release_major = "4" ]; then
 265         sed -i 's|runcmd $"Syncing hardware clock|# LXC no hwclock runcmd $"Syncing hardware clock|' $container_rootfs/etc/rc.d/init.d/halt
 266     else
 267         sed -i 's|\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.d/init.d/halt
 268     fi
 269     sed -i 's|^\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.sysinit
 270     sed -i 's|^\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.d/rc.sysinit
 271     sed -i 's|^/sbin/hwclock|# LXC /sbin/nohwclock|' $container_rootfs/etc/rc.sysinit
 272     sed -i 's|^/sbin/hwclock|# LXC /sbin/nohwclock|' $container_rootfs/etc/rc.d/rc.sysinit
 273
 274     # dont start lvm
 275     if [ $container_release_major -lt "6" -a -f $container_rootfs/sbin/lvm.static ]; then
 276         mv $container_rootfs/sbin/lvm.static $container_rootfs/sbin/lvm.static.lxc-disabled
 277     fi
 278     if [ $container_release_major = "6" ]; then
 279         touch $container_rootfs/.nolvm
 280     fi
 281
 282     # fix assumptions that plymouth is available
 283     sed -i 's|\[ "$PROMPT" != no \] && plymouth|[ "$PROMPT" != no ] \&\& [ -n "$PLYMOUTH" ] \&\& plymouth|' $container_rootfs/etc/rc.sysinit
 284     sed -i 's|\[ "$PROMPT" != no \] && plymouth|[ "$PROMPT" != no ] \&\& [ -n "$PLYMOUTH" ] \&\& plymouth|' $container_rootfs/etc/rc.d/rc.sysinit
 285     rm -f $container_rootfs/etc/init/plymouth-shutdown.conf
 286     rm -f $container_rootfs/etc/init/quit-plymouth.conf
 287     rm -f $container_rootfs/etc/init/splash-manager.conf
 288
 289     # dont try to unmount /dev/lxc devices
 290     sed -i 's|&& $1 !~ /^\\/dev\\/ram/|\&\& $2 !~ /^\\/dev\\/lxc/ \&\& $1 !~ /^\\/dev\\/ram/|' $container_rootfs/etc/init.d/halt
 291
 292     # don't try to unmount swap
 293     sed -i 's|\[ -f /proc/swaps \]|# LXC [ -f /proc/swaps ]|' $container_rootfs/etc/init.d/halt
 294
 295     # sem_open(3) checks that /dev/shm is SHMFS_SUPER_MAGIC, so make sure to
 296     # mount /dev/shm (normally done by dracut initrd) as tmpfs
 297     if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
 298         grep -q "mount -t tmpfs tmpfs /dev/shm" $container_rootfs/etc/rc.sysinit
 299         if [ $? -eq 1 ]; then
 300             echo "mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.sysinit
 301             echo "mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.d/rc.sysinit
 302         fi
 303     fi
 304     if [ $container_release_major = "6" ]; then
 305         sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.sysinit
 306         sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.d/rc.sysinit
 307     fi
 308
 309     # there might be other services that are useless but the below set is a good start
 310     # some of these might not exist in the image, so we silence chkconfig complaining
 311     # about the service file not being found
 312     for service in \
 313         acpid apmd auditd autofs cpuspeed dund gpm haldaemon hidd       \
 314         ip6tables irqbalance iscsi iscsid isdn kdump kudzu              \
 315         lm_sensors lvm2-monitor mdmonitor microcode_ctl                 \
 316         ntpd pcmcia postfix sendmail udev-post xfs ;
 317     do
 318         chroot $container_rootfs chkconfig 2>/dev/null $service off
 319     done
 320
 321     for service in rsyslog ;
 322     do
 323         chroot $container_rootfs chkconfig 2>/dev/null $service on
 324     done
 325 }
 326
 327 container_rootfs_configure()
 328 {
 329     container_rootfs_patch
 330     echo "Configuring container for Oracle Linux $container_release_major.$container_release_minor"
 331
 332     # configure the network to use dhcp. we set DHCP_HOSTNAME so the guest
 333     # will report its name and be resolv'able by the hosts dnsmasq
 334     cat <<EOF > $container_rootfs/etc/sysconfig/network-scripts/ifcfg-eth0
 335 DEVICE=eth0
 336 BOOTPROTO=dhcp
 337 ONBOOT=yes
 338 HOSTNAME=$name
 339 DHCP_HOSTNAME=$name
 340 NM_CONTROLLED=no
 341 TYPE=Ethernet
 342 EOF
 343
 344     # set the hostname
 345     if [ $container_release_major -ge "7" ]; then
 346         # systemd honors /etc/hostname
 347         echo "$name" >$container_rootfs/etc/hostname
 348     fi
 349     cat <<EOF > $container_rootfs/etc/sysconfig/network
 350 NETWORKING=yes
 351 NETWORKING_IPV6=no
 352 HOSTNAME=$name
 353 EOF
 354
 355     # set minimal hosts
 356     echo "127.0.0.1 localhost $name" > $container_rootfs/etc/hosts
 357
 358     # this file has to exist for libvirt/Virtual machine monitor to boot the container
 359     touch $container_rootfs/etc/mtab
 360
 361     # setup console and tty[1-4] for login. note that /dev/console and
 362     # /dev/tty[1-4] will be symlinks to the ptys /dev/lxc/console and
 363     # /dev/lxc/tty[1-4] so that package updates can overwrite the symlinks.
 364     # lxc will maintain these links and bind mount ptys over /dev/lxc/*
 365     # since lxc.devttydir is specified in the config.
 366
 367     # allow root login on console, tty[1-4], and pts/0 for libvirt
 368     echo "# LXC (Linux Containers)" >>$container_rootfs/etc/securetty
 369     echo "lxc/console"  >>$container_rootfs/etc/securetty
 370     for i in 1 2 3 4; do
 371         echo "lxc/tty$i"        >>$container_rootfs/etc/securetty
 372     done
 373     echo "# For libvirt/Virtual Machine Monitor" >>$container_rootfs/etc/securetty
 374     for i in 0 1 2 3 4; do
 375         echo "pts/$i"        >>$container_rootfs/etc/securetty
 376     done
 377
 378     # prevent mingetty from calling vhangup(2) since it fails with userns
 379     if [ -f $container_rootfs/etc/init/tty.conf ]; then
 380         sed -i 's|mingetty|mingetty --nohangup|' $container_rootfs/etc/init/tty.conf
 381     fi
 382
 383     # create maygetty which only spawns a getty on the console when running
 384     # under lxc, not libvirt-lxc which symlinks /dev/console to the same pty
 385     # as /dev/tty1
 386     cat <<EOF >$container_rootfs/sbin/maygetty
 387 #!/bin/sh
 388 if [ "\$container" = "lxc" ]; then
 389     exec /sbin/mingetty \$@
 390 fi
 391 exec sleep infinity
 392 EOF
 393     chmod 755 $container_rootfs/sbin/maygetty
 394
 395     # start a getty on /dev/console, /dev/tty[1-4]
 396     if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
 397         sed -i 's|mingetty|mingetty --nohangup|' $container_rootfs/etc/inittab
 398         sed -i '/1:2345:respawn/i cns:2345:respawn:/sbin/maygetty --nohangup --noclear console' $container_rootfs/etc/inittab
 399         sed -i '/5:2345:respawn/d' $container_rootfs/etc/inittab
 400         sed -i '/6:2345:respawn/d' $container_rootfs/etc/inittab
 401     fi
 402
 403     if [ $container_release_major = "6" ]; then
 404         cat <<EOF > $container_rootfs/etc/init/console.conf
 405 # console - getty
 406 #
 407 # This service maintains a getty on the console from the point the system is
 408 # started until it is shut down again.
 409
 410 start on stopped rc RUNLEVEL=[2345]
 411 stop on runlevel [!2345]
 412 env container
 413
 414 respawn
 415 exec /sbin/maygetty --nohangup --noclear /dev/console
 416 EOF
 417     fi
 418
 419     # lxc-shutdown sends SIGPWR to init, OL4 and OL5 have SysVInit, just
 420     # make it do shutdown now instead of delaying 2 minutes.  OL6 uses
 421     # upstart, so we create an upstart job to handle SIGPWR to shut down
 422     # cleanly.  We use "init 0" instead of shutdown -h now to avoid SELinux
 423     # permission denied when upstart's shutdown tries to connect to the
 424     # /com/ubuntu/upstart socket.
 425     if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
 426         sed -i 's|pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; |pf::powerfail:/sbin/shutdown -f -h now "|' $container_rootfs/etc/inittab
 427     elif [ $container_release_major = "6" ]; then
 428         cat <<EOF > $container_rootfs/etc/init/power-status-changed.conf
 429 # power-status-changed - used to cleanly shut down the container
 430 #
 431 # This task is run whenever init receives SIGPWR
 432 # Used to shut down the machine.
 433
 434 start on power-status-changed
 435
 436 exec init 0
 437 EOF
 438     fi
 439
 440     # start with a clean /var/log/messages
 441     rm -f $container_rootfs/var/log/messages
 442
 443     # add oracle user, set root password
 444     chroot $container_rootfs useradd -m -s /bin/bash oracle
 445     echo "oracle:oracle" | chroot $container_rootfs chpasswd
 446     echo "root:root" | chroot $container_rootfs chpasswd
 447     printf "Added container user:\033[1moracle\033[0m password:\033[1moracle\033[0m\n"
 448     printf "Added container user:\033[1mroot\033[0m password:\033[1mroot\033[0m\n"
 449 }
 450
 451 # create the container's lxc config file
 452 container_config_create()
 453 {
 454     echo "Create configuration file $cfg_dir/config"
 455     mkdir -p $cfg_dir || die "unable to create config dir $cfg_dir"
 456
 457     echo "# Common configuration" >> $cfg_dir/config
 458     if [ -e "@LXCTEMPLATECONFIG@/oracle.common.conf" ]; then
 459         echo "lxc.include = @LXCTEMPLATECONFIG@/oracle.common.conf" >> $cfg_dir/config
 460     fi
 461
 462     # generate a hwaddr for the container with a high mac address
 463     # see http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
 464     local hwaddr="fe:`dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 | \
 465                       head -n 1 |awk '{print $2}' | cut -c1-10 |\
 466                       sed 's/\(..\)/\1:/g; s/.$//'`"
 467     cat <<EOF >> $cfg_dir/config || die "unable to create $cfg_dir/config"
 468 # Container configuration for Oracle Linux $container_release_major.$container_release_minor
 469 lxc.arch = $arch
 470 lxc.utsname = $name
 471 EOF
 472     grep -q "^lxc.rootfs" $cfg_dir/config 2>/dev/null || echo "lxc.rootfs = $container_rootfs" >> $cfg_dir/config
 473
 474     if [ $container_release_major != "4" ]; then
 475         echo "lxc.cap.drop = sys_resource" >>$cfg_dir/config
 476     fi
 477
 478     # systemd services like logind and journald need these
 479     if [ $container_release_major != "7" ]; then
 480         echo "lxc.cap.drop = setfcap setpcap" >>$cfg_dir/config
 481     fi
 482
 483     echo "# Networking" >>$cfg_dir/config
 484     # see if the network settings were already specified
 485     lxc_network_type=`grep '^lxc.network.type' $cfg_dir/config | awk -F'[= \t]+' '{ print $2 }'`
 486     if [ -z "$lxc_network_type" -a                      \
 487         \( $host_distribution = "OracleServer" -o       \
 488            $host_distribution = "Fedora" \) ]; then
 489             echo "lxc.network.type = veth" >>$cfg_dir/config
 490             echo "lxc.network.flags = up" >>$cfg_dir/config
 491             echo "lxc.network.link = virbr0" >>$cfg_dir/config
 492     fi
 493
 494     cat <<EOF >> $cfg_dir/config || die "unable to create $cfg_dir/config"
 495 lxc.network.name = eth0
 496 lxc.network.mtu = 1500
 497 lxc.network.hwaddr = $hwaddr
 498 EOF
 499 }
 500
 501 container_rootfs_clone()
 502 {
 503     if is_btrfs_subvolume $template_rootfs; then
 504         # lxc-create already made $container_rootfs a btrfs subvolume, but
 505         # in this case we want to snapshot the original subvolume so we we
 506         # have to delete the one that lxc-create made
 507         btrfs subvolume delete $container_rootfs
 508         btrfs subvolume snapshot $template_rootfs $container_rootfs || die "btrfs clone template"
 509     else
 510         echo "Copying rootfs ..."
 511         cp -axT $template_rootfs $container_rootfs || die "copy template"
 512     fi
 513 }
 514
 515 container_rootfs_repo_create()
 516 {
 517     echo "# LXC generated .repo file" >$1
 518     echo "[$2]" >>$1
 519     echo "name=Oracle Linux $container_release_major.$container_release_minor ($basearch)" >>$1
 520     echo "baseurl=$3/" >>$1
 521     echo "enabled=1" >>$1
 522     echo "skip_if_unavailable=1" >>$1
 523
 524     if [ "$4" != "" ]; then
 525         echo "gpgkey=$yum_url/RPM-GPG-KEY-oracle-ol$container_release_major" >>$1
 526         echo "gpgcheck=1" >>$1
 527     else
 528         echo "gpgcheck=0" >>$1
 529     fi
 530 }
 531
 532 container_rootfs_dev_create()
 533 {
 534     # create required devices. note that /dev/console will be created by lxc
 535     # or libvirt itself to be a symlink to the right pty.
 536     # take care to not nuke /dev in case $container_rootfs isn't set
 537     dev_path="$container_rootfs/dev"
 538     if [ $container_rootfs != "/" -a -d $dev_path ]; then
 539         rm -rf $dev_path
 540     fi
 541     mkdir -p $dev_path
 542     if can_chcon; then
 543         # ensure symlinks created in /dev have the right context
 544         chcon -t device_t $dev_path
 545     fi
 546     mknod -m 666  $dev_path/null c 1 3
 547     mknod -m 666  $dev_path/zero c 1 5
 548     mknod -m 666  $dev_path/random c 1 8
 549     mknod -m 666  $dev_path/urandom c 1 9
 550     mkdir -m 755  $dev_path/pts
 551     mkdir -m 1777 $dev_path/shm
 552     mknod -m 666  $dev_path/tty c 5 0
 553     mknod -m 666  $dev_path/tty1 c 4 1
 554     mknod -m 666  $dev_path/tty2 c 4 2
 555     mknod -m 666  $dev_path/tty3 c 4 3
 556     mknod -m 666  $dev_path/tty4 c 4 4
 557     mknod -m 666  $dev_path/full c 1 7
 558     mknod -m 600  $dev_path/initctl p
 559
 560     # set selinux labels same as host
 561     if can_chcon; then
 562         for node in null zero random urandom pts shm \
 563                     tty tty0 tty1 tty2 tty3 tty4 full ;
 564         do
 565             chcon --reference /dev/$node $dev_path/$node 2>/dev/null
 566         done
 567     fi
 568 }
 569
 570 container_rootfs_create()
 571 {
 572     if can_chcon; then
 573         chcon --reference / $container_rootfs 2>/dev/null
 574     fi
 575
 576     cmds="rpm wget yum"
 577     if [ $container_release_major -lt "6" ]; then
 578         if [ $host_distribution = "Ubuntu" -o $host_distribution = "Debian" ]; then
 579             db_dump_cmd="db5.1_dump"
 580         fi
 581         if [ $host_distribution = "OracleServer" -o \
 582              $host_distribution = "Fedora" ]; then
 583             db_dump_cmd="db_dump"
 584         fi
 585
 586         cmds="$cmds $db_dump_cmd file"
 587     fi
 588     for cmd in $cmds; do
 589         which $cmd >/dev/null 2>&1
 590         if [ $? -ne 0 ]; then
 591             die "The $cmd command is required, please install it"
 592         fi
 593     done
 594
 595     mkdir -p @LOCALSTATEDIR@/lock/subsys
 596     (
 597         flock -x 9
 598         if [ $? -ne 0 ]; then
 599             die "The template is busy."
 600         fi
 601
 602         echo "Yum installing release $container_release_major.$container_release_minor for $basearch"
 603
 604         if [ -n "$repourl" ]; then
 605             yum_url=$repourl
 606         else
 607             yum_url=http://public-yum.oracle.com
 608         fi
 609         if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
 610             latest_L="el"
 611             latest_U="EL"
 612         else
 613             latest_L="ol"
 614             latest_U="OL"
 615         fi
 616
 617         if [ -n "$baseurl" ]; then
 618             # create .repo pointing at baseurl
 619             repo="lxc-install"
 620             mkdir -p $container_rootfs/etc/yum.repos.d
 621             container_rootfs_repo_create \
 622                 $container_rootfs/etc/yum.repos.d/lxc-install.repo $repo $baseurl
 623         else
 624             # get public-yum repo file
 625             if   [ $container_release_major = "4" ]; then
 626                 repofile=public-yum-el4.repo
 627             elif [ $container_release_major = "5" ]; then
 628                 repofile=public-yum-el5.repo
 629             elif [ $container_release_major = "6" ]; then
 630                 repofile=public-yum-ol6.repo
 631             elif [ $container_release_major = "7" ]; then
 632                 repofile=public-yum-ol7.repo
 633             else
 634                 die "Unsupported release $container_release_major"
 635             fi
 636
 637             mkdir -p $container_rootfs/etc/yum.repos.d
 638             wget -q $yum_url/$repofile -O $container_rootfs/etc/yum.repos.d/$repofile
 639             if [ $? -ne 0 ]; then
 640                 die "Unable to download repo file $yum_url/$repofile, release unavailable"
 641             fi
 642
 643             # yum will take $basearch from host, so force the arch we want
 644             sed -i "s|\$basearch|$basearch|" $container_rootfs/etc/yum.repos.d/$repofile
 645
 646             # replace url if they specified one
 647             if [ -n "$repourl" ]; then
 648                 sed -i "s|baseurl=http://public-yum.oracle.com/repo|baseurl=$repourl/repo|" $container_rootfs/etc/yum.repos.d/$repofile
 649                 sed -i "s|gpgkey=http://public-yum.oracle.com|gpgkey=$repourl|" $container_rootfs/etc/yum.repos.d/$repofile
 650             fi
 651
 652             # disable all repos, then enable the repo for the version we are installing.
 653             if [ $container_release_minor = "latest" ]; then
 654                 repo=$latest_L""$container_release_major"_"$container_release_minor
 655             elif [ $container_release_major = "7" ]; then
 656                     repo="ol"$container_release_major"_u"$container_release_minor"_base"
 657             elif [ $container_release_major = "6" ]; then
 658                 if   [ $container_release_minor = "0" ]; then
 659                     repo="ol"$container_release_major"_ga_base"
 660                 else
 661                     repo="ol"$container_release_major"_u"$container_release_minor"_base"
 662                 fi
 663             elif [ $container_release_major = "5" ]; then
 664                 if   [ $container_release_minor = "0" ]; then
 665                     repo="el"$container_release_major"_ga_base"
 666                 elif [ $container_release_minor -lt "6" ]; then
 667                     repo="el"$container_release_major"_u"$container_release_minor"_base"
 668                 else
 669                     repo="ol"$container_release_major"_u"$container_release_minor"_base"
 670                 fi
 671             elif [ $container_release_major = "4" -a $container_release_minor -gt "5" ]; then
 672                 repo="el"$container_release_major"_u"$container_release_minor"_base"
 673             else
 674                 die "Unsupported release $container_release_major.$container_release_minor"
 675             fi
 676             sed -i "s|enabled=1|enabled=0|" $container_rootfs/etc/yum.repos.d/$repofile
 677             sed -i "/\[$repo\]/,/\[/ s/enabled=0/enabled=1/" $container_rootfs/etc/yum.repos.d/$repofile
 678         fi
 679
 680         container_rootfs_dev_create
 681
 682         # don't put devpts,proc, nor sysfs in here, it will already be mounted for us by lxc/libvirt
 683         echo "" >$container_rootfs/etc/fstab
 684
 685         # create rpm db, download and yum install minimal packages
 686         mkdir -p $container_rootfs/var/lib/rpm
 687         rpm --root $container_rootfs --initdb
 688         yum_args="--installroot $container_rootfs --disablerepo=* --enablerepo=$repo -y --nogpgcheck"
 689         min_pkgs="yum initscripts passwd rsyslog vim-minimal openssh-server openssh-clients dhclient chkconfig rootfiles policycoreutils oraclelinux-release"
 690         if [ $container_release_major -lt "6" ]; then
 691             min_pkgs="$min_pkgs db4-utils"
 692         fi
 693
 694         # we unshare the mount namespace because yum installing the ol4
 695         # packages causes $rootfs/proc to be mounted on
 696         lxc-unshare -s MOUNT yum -- $yum_args install $min_pkgs $user_pkgs
 697         if [ $? -ne 0 ]; then
 698             die "Failed to download and install the rootfs, aborting."
 699         fi
 700
 701         # rsyslog and pam depend on coreutils for some common commands in
 702         # their POSTIN scriptlets, but coreutils wasn't installed yet. now
 703         # that coreutils is installed, reinstall the packages so their POSTIN
 704         # runs right. similarly, libutempter depends on libselinux.so.1 when
 705         # it runs /usr/sbin/groupadd, so reinstall it too
 706         redo_pkgs=""
 707         if [ $container_release_major = "5" ]; then
 708             if   [ $container_release_minor = "latest" ]; then
 709                 redo_pkgs="pam rsyslog libutempter"
 710             elif [ $container_release_minor -lt 2 ]; then
 711                 redo_pkgs="pam"
 712             elif [ $container_release_minor -lt 6 ]; then
 713                 redo_pkgs="pam rsyslog"
 714             elif [ $container_release_minor -gt 5 ]; then
 715                 redo_pkgs="pam rsyslog libutempter"
 716             fi
 717         fi
 718         # shadow utils fails on ol4 and ol6.1
 719         if [ $container_release_major = "4" -o \
 720              $container_release_major = "6" -a $container_release_minor = "1" ]; then
 721             redo_pkgs="shadow-utils"
 722         fi
 723         if [ x"$redo_pkgs" != x ]; then
 724             rpm --root $container_rootfs --nodeps -e $redo_pkgs
 725             lxc-unshare -s MOUNT yum -- $yum_args install $redo_pkgs
 726             if [ $? -ne 0 ]; then
 727                 die "Unable to reinstall packages"
 728             fi
 729         fi
 730
 731         # if installing from a baseurl, create a .repo that the container
 732         # can use to update to _latest from http://public-yum.oracle.com
 733         if [ -n "$baseurl" ]; then
 734             container_rootfs_repo_create \
 735                 "$container_rootfs/etc/yum.repos.d/public-yum-"$latestL""$container_release_major".repo" \
 736                 $latest_L""$container_release_major"_latest" \
 737                 $yum_url"/repo/OracleLinux/"$latest_U""$container_release_major"/latest/$basearch" gpg
 738         fi
 739
 740         # these distributions put the rpm database in a place the guest is
 741         # not expecting it, so move it
 742         if [ $host_distribution = "Ubuntu" -o $host_distribution = "Debian" ]; then
 743             mv $container_rootfs/$HOME/.rpmdb/* $container_rootfs/var/lib/rpm
 744         fi
 745
 746         # if the native rpm created the db with Hash version 9, we need to
 747         # downgrade it to Hash version 8 for use with OL5.x
 748         db_version=`file $container_rootfs/var/lib/rpm/Packages | \
 749                     grep -o 'version [0-9]*' |awk '{print $2}'`
 750         if [ $container_release_major -lt "6" -a $db_version != "8" ]; then
 751             echo "Fixing (downgrading) rpm database from version $db_version"
 752             rm -f $container_rootfs/var/lib/rpm/__db*
 753             for db in $container_rootfs/var/lib/rpm/* ; do
 754                 $db_dump_cmd $db |chroot $container_rootfs db_load /var/lib/rpm/`basename $db`.new
 755                 mv $db.new $db
 756             done
 757         fi
 758
 759         # the host rpm may not be the same as the guest, rebuild the db with
 760         # the guest rpm version
 761         echo "Rebuilding rpm database"
 762         rm -f $container_rootfs/var/lib/rpm/__db*
 763         chroot $container_rootfs rpm --rebuilddb >/dev/null 2>&1
 764
 765     ) 9>@LOCALSTATEDIR@/lock/subsys/lxc-oracle-$name
 766     if [ $? -ne 0 ]; then
 767         exit 1
 768     fi
 769 }
 770
 771 container_release_get()
 772 {
 773     if [ -f $1/etc/oracle-release ]; then
 774         container_release_version=`cat $1/etc/oracle-release |awk '/^Oracle/ {print $5}'`
 775         container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
 776         container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
 777     elif grep -q "Enterprise Linux AS" $1/etc/redhat-release; then
 778         container_release_major=`cat $1/etc/redhat-release |awk '{print $7}'`
 779         container_release_minor=`cat $1/etc/redhat-release |awk '{print $10}' |tr -d ")"`
 780         container_release_version="$container_release_major.$container_release_minor"
 781     elif grep -q "Enterprise Linux Server" $1/etc/redhat-release; then
 782         container_release_version=`cat $1/etc/redhat-release |awk '{print $7}'`
 783         container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
 784         container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
 785     else
 786         echo "Unable to determine container release version"
 787         exit 1
 788     fi
 789 }
 790
 791 usage()
 792 {
 793     cat <<EOF
 794   -a|--arch=<arch>        architecture (ie. i386, x86_64)
 795   -R|--release=<release>  release to download for the new container
 796   --rootfs=<path>         rootfs path
 797   -r|--rpms=<rpm name>    additional rpms to install into container
 798   -u|--url=<url>          replace yum repo url (ie. Oracle public-yum mirror)
 799      --baseurl=<url>      use package repository (ie. file:///mnt)
 800                           arch and release must also be specified
 801   -t|--templatefs=<path>  copy/clone rootfs at path instead of downloading
 802   -P|--patch=<path>       only patch the rootfs at path for use as a container
 803   -h|--help
 804
 805 Release is of the format "major.minor", for example "5.8", "6.3", or "6.latest"
 806 This template supports Oracle Linux releases 4.6 - 7.0
 807 EOF
 808     return 0
 809 }
 810
 811 options=$(getopt -o hp:n:a:R:r:u:t: -l help,rootfs:,path:,name:,arch:,release:,rpms:,url:,templatefs:,patch:,baseurl: -- "$@")
 812 if [ $? -ne 0 ]; then
 813     usage $(basename $0)
 814     exit 1
 815 fi
 816
 817 eval set -- "$options"
 818 while true
 819 do
 820     case "$1" in
 821         -h|--help)              usage $0 && exit 0;;
 822         -p|--path)              cfg_dir=$2; shift 2;;
 823         --rootfs)               container_rootfs=$2; shift 2;;
 824         -n|--name)              name=$2; shift 2;;
 825         -a|--arch)              arch=$2; shift 2;;
 826         -R|--release)           container_release_version=$2; shift 2;;
 827         -r|--rpms)              user_pkgs=$2; shift 2;;
 828         -u|--url)               repourl=$2; shift 2;;
 829         -t|--templatefs)        template_rootfs=$2; shift 2;;
 830         --patch)                patch_rootfs=$2; shift 2;;
 831         --baseurl)              baseurl=$2; shift 2;;
 832         --)                     shift 1; break ;;
 833         *)                      break ;;
 834     esac
 835 done
 836
 837 # make sure mandatory args are given and valid
 838 if [ "$(id -u)" != "0" ]; then
 839     echo "This script should be run as 'root'"
 840     exit 1
 841 fi
 842
 843 if [ -n "$baseurl" ]; then
 844     if [ "$arch" = "" -o "$container_release_version" = "" ]; then
 845         echo "The --arch and --release must be specified when using --baseurl"
 846         usage
 847         exit 1
 848     fi
 849 fi
 850
 851 if [ "$arch" = "" ]; then
 852     arch=$(uname -m)
 853 fi
 854
 855 if [ -n "$patch_rootfs" ]; then
 856     container_rootfs="$patch_rootfs"
 857     container_release_get $container_rootfs
 858     container_rootfs_patch
 859     exit 0
 860 fi
 861
 862 if [ -z $name ]; then
 863     echo "Container name must be given"
 864     usage
 865     exit 1
 866 fi
 867
 868 if [ -z $cfg_dir ]; then
 869     echo "Configuration directory must be given, check lxc-create"
 870     usage
 871     exit 1
 872 fi
 873
 874 basearch=$arch
 875 if [ "$arch" = "i686" ]; then
 876     basearch="i386"
 877 fi
 878
 879 if [ "$arch" != "i386" -a "$arch" != "x86_64" ]; then
 880     echo "Bad architecture given, check lxc-create"
 881     usage
 882     exit 1
 883 fi
 884
 885 if which lsb_release >/dev/null 2>&1; then
 886     host_distribution=`lsb_release --id |awk '{print $3}'`
 887     host_release_version=`lsb_release --release |awk '{print $2}'`
 888     host_release_major=`echo $host_release_version |awk -F '.' '{print $1}'`
 889     host_release_minor=`echo $host_release_version |awk -F '.' '{print $2}'`
 890 else
 891     if   [ -f /etc/fedora-release ]; then
 892        host_distribution="Fedora"
 893        host_release_version=`cat /etc/fedora-release |awk '{print $3}'`
 894        host_release_major=$host_release_version
 895        host_release_minor=0
 896     elif [ -f /etc/oracle-release ]; then
 897        host_distribution="OracleServer"
 898        host_release_version=`cat /etc/oracle-release |awk '{print $5}'`
 899        host_release_major=`echo $host_release_version |awk -F '.' '{print $1}'`
 900        host_release_minor=`echo $host_release_version |awk -F '.' '{print $2}'`
 901     else
 902        echo "Unable to determine host distribution, ensure lsb_release is installed"
 903        exit 1
 904     fi
 905 fi
 906 echo "Host is $host_distribution $host_release_version"
 907
 908 if [ -z "$container_rootfs" ]; then
 909     container_rootfs="$cfg_dir/rootfs"
 910 fi
 911
 912 if [ -n "$template_rootfs" ]; then
 913     container_release_get $template_rootfs
 914 else
 915     if [ -z "$container_release_version" ]; then
 916         if [ $host_distribution = "OracleServer" ]; then
 917             container_release_version=$host_release_version
 918         else
 919             echo "No release specified with -R, defaulting to 6.5"
 920             container_release_version="6.5"
 921         fi
 922     fi
 923     container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
 924     container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
 925 fi
 926
 927 container_config_create
 928 if [ -n "$template_rootfs" ]; then
 929     container_rootfs_clone
 930 else
 931     container_rootfs_create
 932 fi
 933
 934 container_release_get $container_rootfs
 935
 936 container_rootfs_configure
 937
 938 echo "Container : $container_rootfs"
 939 echo "Config    : $cfg_dir/config"
 940 echo "Network   : eth0 ($lxc_network_type) on $lxc_network_link"