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lxc-templates/templates/lxc-oracle.in
Tanya Degurechaff 92d4e109f1 Reformatting tabs and spaces in a coherent way
Signed-off-by: Tanya Degurechaff <34323200+TanyaEleventhGoddess@users.noreply.github.com>
2020-07-13 18:29:08 +02:00

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#!/bin/sh
#
# Template script for generating Oracle Enterprise Linux container for LXC
# based on lxc-fedora, lxc-ubuntu
#
# Copyright © 2011 Wim Coekaerts <wim.coekaerts@oracle.com>
# Copyright © 2012 Dwight Engen <dwight.engen@oracle.com>
#
# Modified for Oracle Linux 5
# Wim Coekaerts <wim.coekaerts@oracle.com>
#
# Modified for Oracle Linux 6,7 combined OL4,5,6 into one template script
# Dwight Engen <dwight.engen@oracle.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Detect use under userns (unsupported)
for arg in "$@"; do
[ "$arg" = "--" ] && break
if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
echo "This template can't be used for unprivileged containers." 1>&2
echo "You may want to try the \"download\" template instead." 1>&2
exit 1
fi
done
# Make sure the usual locations are in PATH
export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
die()
{
echo "failed: $1"
exit 1
}
is_btrfs_subvolume()
{
if which btrfs >/dev/null 2>&1 && \
btrfs subvolume list "$1" >/dev/null 2>&1; then
return 0
fi
return 1
}
can_chcon()
{
if which chcon >/dev/null 2>&1; then
selinuxenabled >/dev/null 2>&1
return $?
fi
return 1
}
# fix up the container_rootfs
container_rootfs_patch()
{
echo "Patching container rootfs $container_rootfs for Oracle Linux $container_release_major.$container_release_minor"
# copy ourself into the container to be used to --patch the rootfs when
# yum update on certain packages is done. we do this here instead of in
# container_rootfs_configure() in case the patching done in this function
# is updated in the future, we can inject the updated version of ourself
# into older containers.
if [ $container_rootfs != "/" ]; then
cp -f `readlink -f $0` $container_rootfs/usr/bin/lxc-patch
if [ $container_release_major -lt "6" ]; then
mkdir -p $container_rootfs/usr/lib/yum-plugins
cp @DATADIR@/lxc/lxc-patch.py $container_rootfs/usr/lib/yum-plugins
fi
if [ $container_release_major -ge "6" ]; then
mkdir -p $container_rootfs/usr/share/yum-plugins
cp @DATADIR@/lxc/lxc-patch.py $container_rootfs/usr/share/yum-plugins
fi
mkdir -p $container_rootfs/etc/yum/pluginconf.d
cat <<EOF > $container_rootfs/etc/yum/pluginconf.d/lxc-patch.conf
[main]
enabled=1
packages=dbus,initscripts,iptables,openssh-server,setup,selinux-policy,readahead,udev,util-linux,util-linux-ng
EOF
fi
if [ $container_release_major = "4" ]; then
# yum plugin type of TYPE_INTERFACE works in all releases but gives a
# deprecation warning on major > 4, so we default to TYPE_INTERACTIVE
# and fix it up here
sed -i 's|TYPE_INTERACTIVE|TYPE_INTERFACE|' $container_rootfs/usr/lib/yum-plugins/lxc-patch.py
if [ -f $container_rootfs/etc/yum.repos.d/ULN-Base.repo ]; then
mv $container_rootfs/etc/yum.repos.d/ULN-Base.repo \
$container_rootfs/etc/yum.repos.d/ULN-Base.repo.lxc-disabled
fi
echo "plugins = 1" >>$container_rootfs/etc/yum.conf
fi
# "disable" selinux in the guest. The policy in the container isn't
# likely to match the hosts (unless host == guest exactly) and the
# kernel can only be enforcing one policy.
#
# The OL 5 init honors /etc/selinux/config, but note that
# this doesnt actually disable it if it's enabled in the host, since
# libselinux::is_selinux_enabled() in the guest will check
# /proc/filesystems and see selinuxfs, thus reporting that it is on
# (ie. check the output of sestatus in the guest). We also replace
# /usr/sbin/selinuxenabled with a symlink to /bin/false so that init
# scripts (ie. mcstransd) that call that think selinux is disabled.
mkdir -p $container_rootfs/selinux
echo 0 > $container_rootfs/selinux/enforce
if [ -e $container_rootfs/etc/selinux/config ]; then
sed -i 's|SELINUX=enforcing|SELINUX=disabled|' $container_rootfs/etc/selinux/config
else
mkdir -p $container_rootfs/etc/selinux
echo "SELINUX=disabled" >$container_rootfs/etc/selinux/config
fi
sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*close|#session required pam_selinux.so close|' $container_rootfs/etc/pam.d/login
sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*open|#session required pam_selinux.so open|' $container_rootfs/etc/pam.d/login
sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*close|#session required pam_selinux.so close|' $container_rootfs/etc/pam.d/sshd
sed -i 's|session[ \t]*required[ \t]*pam_selinux.so[ \t]*open|#session required pam_selinux.so open|' $container_rootfs/etc/pam.d/sshd
# setting /proc/$$/loginuid doesn't work under user namespace, which
# prevents logins from working
sed -i 's|session[ \t]*required[ \t]*pam_loginuid.so|#session required pam_loginuid.so|' $container_rootfs/etc/pam.d/sshd
sed -i 's|session[ \t]*required[ \t]*pam_loginuid.so|#session required pam_loginuid.so|' $container_rootfs/etc/pam.d/login
if [ -f $container_rootfs/usr/sbin/selinuxenabled ]; then
mv $container_rootfs/usr/sbin/selinuxenabled $container_rootfs/usr/sbin/selinuxenabled.lxcorig
ln -s /bin/false $container_rootfs/usr/sbin/selinuxenabled
fi
# ensure /dev/ptmx refers to the newinstance devpts of the container, or
# pty's will get crossed up with the hosts (https://lkml.org/lkml/2012/1/23/512)
rm -f $container_rootfs/dev/ptmx
ln -s pts/ptmx $container_rootfs/dev/ptmx
# OL7 has systemd, no rc.sysinit
if [ $container_release_major = "7" ]; then
# with newer systemd (OL7.2), getty service include container-getty.service
# let that be the one who manage the getty service instead
if [ ! -f $container_rootfs/usr/lib/systemd/system/container-getty@.service ]; then
# from mhw in the fedora template: We do need to disable the
# "ConditionalPathExists=/dev/tty0" line or no gettys are started on
# the ttys in the container. Lets do it in an override copy of the
# service so it can still pass rpm verifies and not be automatically
# updated by a new systemd version.
sed -e 's/^ConditionPathExists=/#LXC ConditionPathExists=/' \
< $container_rootfs/usr/lib/systemd/system/getty\@.service \
> $container_rootfs/etc/systemd/system/getty\@.service
# Setup getty service on the 4 ttys we are going to allow in the
# default config. Number should match lxc.tty
( cd $container_rootfs/etc/systemd/system/getty.target.wants
for i in 1 2 3 4 ; do ln -sf ../getty\@.service getty@tty${i}.service; done )
# We only want to spawn a getty on /dev/console in lxc, libvirt-lxc
# symlinks /dev/console to /dev/tty1
sed -i '/Before=getty.target/a ConditionVirtualization=lxc' $container_rootfs/usr/lib/systemd/system/console-getty.service
fi
# disable some systemd services, set default boot, sigpwr target
rm -f $container_rootfs/usr/lib/systemd/system/sysinit.target.wants/kmod-static-nodes.service
chroot $container_rootfs systemctl -q disable graphical.target
chroot $container_rootfs systemctl -q enable multi-user.target
# systemd in userns won't be able to set /proc/self/oom_score_adj which
# prevents the dbus service from starting
sed -i 's|^OOMScoreAdjust|#LXC OOMScoreAdjust|' $container_rootfs/usr/lib/systemd/system/dbus.service
return
fi
# silence error in checking for selinux
sed -i 's|cat /proc/self/attr/current|cat /proc/self/attr/current 2>/dev/null|' $container_rootfs/etc/rc.sysinit
sed -i 's|cat /proc/self/attr/current|cat /proc/self/attr/current 2>/dev/null|' $container_rootfs/etc/rc.d/rc.sysinit
# on ol4 pam_limits prevents logins when using user namespaces
if [ $container_release_major = "4" ]; then
sed -i 's|session[ \t]*required[ \t]*/lib/security/\$ISA/pam_limits.so|#session required /lib/security/$ISA/pam_limits.so|' $container_rootfs/etc/pam.d/system-auth
fi
# avoid error in ol5 attempting to copy non-existent resolv.conf
if [ $container_release_major = "5" ]; then
sed -i 's|resolv.conf.predhclient|resolv.conf.predhclient 2>/dev/null|' $container_rootfs/sbin/dhclient-script
fi
# disable interactive ovmd asking questions
if [ -f $container_rootfs/etc/sysconfig/ovmd ]; then
sed -i 's|INITIAL_CONFIG=yes|INITIAL_CONFIG=no|' $container_rootfs/etc/sysconfig/ovmd
fi
# disable disabling of ipv4 forwarding and defrag on shutdown since
# we mount /proc/sys ro
if [ $container_release_major = "5" ]; then
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
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
fi
# disable ipv6 on ol6
rm -f $container_rootfs/etc/sysconfig/network-scripts/init.ipv6-global
# remove module stuff for iptables it just shows errors that are not
# relevant in a container
if [ -f "$container_rootfs/etc/sysconfig/iptables-config" ]; then
sed -i 's|IPTABLES_MODULES=".*|IPTABLES_MODULES=""|' $container_rootfs/etc/sysconfig/iptables-config
sed -i 's|IPTABLES_MODULES_UNLOAD=".*|IPTABLES_MODULES_UNLOAD="no"|' $container_rootfs/etc/sysconfig/iptables-config
fi
# disable readahead in the container
if [ $container_release_major = "6" -a -e $container_rootfs/etc/sysconfig/readahead ]; then
rm -f $container_rootfs/etc/init/readahead-collector.conf
rm -f $container_rootfs/etc/init/readahead-disable-services.conf
sed -i 's|READAHEAD="yes"|READAHEAD="no"|' $container_rootfs/etc/sysconfig/readahead
fi
if [ $container_release_major = "4" ]; then
# enable fastboot always
sed -i 's|\[ -f /fastboot \]|/bin/true|' $container_rootfs/etc/rc.sysinit
sed -i 's|\[ -f /fastboot \]|/bin/true|' $container_rootfs/etc/rc.d/rc.sysinit
# dont attempt to set kernel parameters
sed -i 's|action $"Configuring kernel parameters|# LXC action $"Configuring kernel parameters|' $container_rootfs/etc/rc.sysinit
sed -i 's|action $"Configuring kernel parameters|# LXC action $"Configuring kernel parameters|' $container_rootfs/etc/rc.d/rc.sysinit
sed -i 's|action $"Setting network parameters|# LXC action $"Setting network parameters|' $container_rootfs/etc/init.d/network 2>/dev/null
sed -i 's|action $"Setting network parameters|# LXC action $"Setting network parameters|' $container_rootfs/etc/init.d/NetworkManager 2>/dev/null
fi
# no need to attempt to mount /
sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.sysinit
sed -i 's|mount -f /$|# LXC mount -f /|' $container_rootfs/etc/rc.d/rc.sysinit
sed -i 's|action \$"Remounting root filesystem|/bin/true # LXC action $"Remounting root filesystem|' $container_rootfs/etc/rc.sysinit
sed -i 's|action \$"Remounting root filesystem|/bin/true # LXC action $"Remounting root filesystem|' $container_rootfs/etc/rc.d/rc.sysinit
# disable udev in the container
if [ $container_release_major = "4" ]; then
sed -i 's|\[ -x /sbin/start_udev \]|# LXC no udev|' $container_rootfs/etc/rc.sysinit
sed -i 's|\[ -x /sbin/start_udev \]|# LXC no udev|' $container_rootfs/etc/rc.d/rc.sysinit
else
sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.sysinit
sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.d/rc.sysinit
fi
# disable nash raidautorun in the container since no /dev/md*
if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
sed -i 's|echo "raidautorun /dev/md0"|echo ""|' $container_rootfs/etc/rc.sysinit
sed -i 's|echo "raidautorun /dev/md0"|echo ""|' $container_rootfs/etc/rc.d/rc.sysinit
fi
# prevent rc.sysinit from attempting to loadkeys
if [ \( $container_release_major = "4" -o $container_release_major = "5" \) -a -e $container_rootfs/etc/sysconfig/keyboard ]; then
rm $container_rootfs/etc/sysconfig/keyboard
fi
# dont use the hwclock, it messes up the host's time
if [ $container_release_major = "4" ]; then
sed -i 's|runcmd $"Syncing hardware clock|# LXC no hwclock runcmd $"Syncing hardware clock|' $container_rootfs/etc/rc.d/init.d/halt
else
sed -i 's|\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.d/init.d/halt
fi
sed -i 's|^\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.sysinit
sed -i 's|^\[ -x /sbin/hwclock|\[ 0 -eq 1|' $container_rootfs/etc/rc.d/rc.sysinit
sed -i 's|^/sbin/hwclock|# LXC /sbin/nohwclock|' $container_rootfs/etc/rc.sysinit
sed -i 's|^/sbin/hwclock|# LXC /sbin/nohwclock|' $container_rootfs/etc/rc.d/rc.sysinit
# dont start lvm
if [ $container_release_major -lt "6" -a -f $container_rootfs/sbin/lvm.static ]; then
mv $container_rootfs/sbin/lvm.static $container_rootfs/sbin/lvm.static.lxc-disabled
fi
if [ $container_release_major = "6" ]; then
touch $container_rootfs/.nolvm
fi
# fix assumptions that plymouth is available
sed -i 's|\[ "$PROMPT" != no \] && plymouth|[ "$PROMPT" != no ] \&\& [ -n "$PLYMOUTH" ] \&\& plymouth|' $container_rootfs/etc/rc.sysinit
sed -i 's|\[ "$PROMPT" != no \] && plymouth|[ "$PROMPT" != no ] \&\& [ -n "$PLYMOUTH" ] \&\& plymouth|' $container_rootfs/etc/rc.d/rc.sysinit
rm -f $container_rootfs/etc/init/plymouth-shutdown.conf
rm -f $container_rootfs/etc/init/quit-plymouth.conf
rm -f $container_rootfs/etc/init/splash-manager.conf
# dont try to unmount /dev/lxc devices
sed -i 's|&& $1 !~ /^\\/dev\\/ram/|\&\& $2 !~ /^\\/dev\\/lxc/ \&\& $1 !~ /^\\/dev\\/ram/|' $container_rootfs/etc/init.d/halt
# don't try to unmount swap
sed -i 's|\[ -f /proc/swaps \]|# LXC [ -f /proc/swaps ]|' $container_rootfs/etc/init.d/halt
# sem_open(3) checks that /dev/shm is SHMFS_SUPER_MAGIC, so make sure to
# mount /dev/shm (normally done by dracut initrd) as tmpfs
if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
grep -q "mount -t tmpfs tmpfs /dev/shm" $container_rootfs/etc/rc.sysinit
if [ $? -eq 1 ]; then
echo "mkdir -p /dev/shm && mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.sysinit
echo "mkdir -p /dev/shm && mount -t tmpfs tmpfs /dev/shm" >>$container_rootfs/etc/rc.d/rc.sysinit
fi
fi
if [ $container_release_major = "6" ]; then
sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mkdir -p /dev/shm \&\& mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.sysinit
sed -i 's|mount -n -o remount /dev/shm >/dev/null 2>&1$|mkdir -p /dev/shm \&\& mount -t tmpfs tmpfs /dev/shm # LXC|' $container_rootfs/etc/rc.d/rc.sysinit
fi
# there might be other services that are useless but the below set is a good start
# some of these might not exist in the image, so we silence chkconfig complaining
# about the service file not being found
for service in \
acpid apmd auditd autofs cpuspeed dund gpm haldaemon hidd \
ip6tables irqbalance iscsi iscsid isdn kdump kudzu \
lm_sensors lvm2-monitor mdmonitor microcode_ctl \
ntpd pcmcia postfix sendmail udev-post xfs ;
do
chroot $container_rootfs chkconfig 2>/dev/null $service off
done
for service in rsyslog ;
do
chroot $container_rootfs chkconfig 2>/dev/null $service on
done
}
container_rootfs_configure()
{
container_rootfs_patch
echo "Configuring container for Oracle Linux $container_release_major.$container_release_minor"
# configure the network to use dhcp. we set DHCP_HOSTNAME so the guest
# will report its name and be resolv'able by the hosts dnsmasq
cat <<EOF > $container_rootfs/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
HOSTNAME=$name
DHCP_HOSTNAME=\`hostname\`
NM_CONTROLLED=no
TYPE=Ethernet
EOF
# set the hostname
if [ $container_release_major -ge "7" ]; then
# systemd honors /etc/hostname
echo "$name" >$container_rootfs/etc/hostname
fi
cat <<EOF > $container_rootfs/etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=$name
EOF
# set minimal hosts
echo "127.0.0.1 localhost $name" > $container_rootfs/etc/hosts
# this file has to exist for libvirt/Virtual machine monitor to boot the container
touch $container_rootfs/etc/mtab
# setup console and tty[1-4] for login. note that /dev/console and
# /dev/tty[1-4] will be symlinks to the ptys /dev/lxc/console and
# /dev/lxc/tty[1-4] so that package updates can overwrite the symlinks.
# lxc will maintain these links and bind mount ptys over /dev/lxc/*
# since lxc.tty.dir is specified in the config.
# allow root login on console, tty[1-4], and pts/0 for libvirt
echo "# LXC (Linux Containers)" >>$container_rootfs/etc/securetty
echo "lxc/console" >>$container_rootfs/etc/securetty
for i in 1 2 3 4; do
echo "lxc/tty$i" >>$container_rootfs/etc/securetty
done
echo "# For libvirt/Virtual Machine Monitor" >>$container_rootfs/etc/securetty
for i in 0 1 2 3 4; do
echo "pts/$i" >>$container_rootfs/etc/securetty
done
# prevent mingetty from calling vhangup(2) since it fails with userns
if [ -f $container_rootfs/etc/init/tty.conf ]; then
sed -i 's|mingetty|mingetty --nohangup|' $container_rootfs/etc/init/tty.conf
fi
# create maygetty which only spawns a getty on the console when running
# under lxc, not libvirt-lxc which symlinks /dev/console to the same pty
# as /dev/tty1
cat <<EOF >$container_rootfs/sbin/maygetty
#!/bin/sh
if [ "\$container" = "lxc" ]; then
exec /sbin/mingetty \$@
fi
exec sleep infinity
EOF
chmod 755 $container_rootfs/sbin/maygetty
# start a getty on /dev/console, /dev/tty[1-4]
if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
sed -i 's|mingetty|mingetty --nohangup|' $container_rootfs/etc/inittab
sed -i '/1:2345:respawn/i cns:2345:respawn:/sbin/maygetty --nohangup --noclear console' $container_rootfs/etc/inittab
sed -i '/5:2345:respawn/d' $container_rootfs/etc/inittab
sed -i '/6:2345:respawn/d' $container_rootfs/etc/inittab
fi
if [ $container_release_major = "6" ]; then
cat <<EOF > $container_rootfs/etc/init/console.conf
# console - getty
#
# This service maintains a getty on the console from the point the system is
# started until it is shut down again.
start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]
env container
respawn
exec /sbin/maygetty --nohangup --noclear /dev/console
EOF
fi
# lxc-shutdown sends SIGPWR to init, OL4 and OL5 have SysVInit, just
# make it do shutdown now instead of delaying 2 minutes. OL6 uses
# upstart, so we create an upstart job to handle SIGPWR to shut down
# cleanly. We use "init 0" instead of shutdown -h now to avoid SELinux
# permission denied when upstart's shutdown tries to connect to the
# /com/ubuntu/upstart socket.
if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
sed -i 's|pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; |pf::powerfail:/sbin/shutdown -f -h now "|' $container_rootfs/etc/inittab
elif [ $container_release_major = "6" ]; then
cat <<EOF > $container_rootfs/etc/init/power-status-changed.conf
# power-status-changed - used to cleanly shut down the container
#
# This task is run whenever init receives SIGPWR
# Used to shut down the machine.
start on power-status-changed
exec init 0
EOF
fi
# start with a clean /var/log/messages
rm -f $container_rootfs/var/log/messages
# set initial timezone as on host
if [ -f /etc/sysconfig/clock ]; then
. /etc/sysconfig/clock
if [ $container_release_major = "5" -o $container_release_major = "6" ]; then
echo ZONE=$ZONE > $container_rootfs/etc/sysconfig/clock
chroot $container_rootfs tzdata-update
else
ZONE="${ZONE// /_}"
chroot $container_rootfs ln -sf ../usr/share/zoneinfo/$ZONE /etc/localtime
fi
else
ZONE=`readlink /etc/localtime | sed -s "s/\.\.\/usr\/share\/zoneinfo\///g"`
if [ "$ZONE" ]; then
if [ $container_release_major = "5" -o $container_release_major = "6" ]; then
echo ZONE=$ZONE > $container_rootfs/etc/sysconfig/clock
chroot $container_rootfs tzdata-update
else
# if /etc/localtime is a symlink, this should preserve it.
cp -a /etc/localtime $container_rootfs/etc/localtime
fi
else
echo "Timezone in container is not configured. Adjust it manually."
fi
fi
# add oracle user
chroot $container_rootfs useradd -m -s /bin/bash oracle
printf "Added container user:\033[1moracle\033[0m\n"
printf "Added container user:\033[1mroot\033[0m\n"
}
# create the container's lxc config file
container_config_create()
{
echo "Create configuration file $cfg_dir/config"
mkdir -p $cfg_dir || die "unable to create config dir $cfg_dir"
echo "# Common configuration" >> $cfg_dir/config
if [ -e "@LXCTEMPLATECONFIG@/oracle.common.conf" ]; then
echo "lxc.include = @LXCTEMPLATECONFIG@/oracle.common.conf" >> $cfg_dir/config
fi
cat <<EOF >> $cfg_dir/config || die "unable to create $cfg_dir/config"
# Container configuration for Oracle Linux $container_release_major.$container_release_minor
lxc.arch = $arch
lxc.uts.name = $name
EOF
grep -q "^lxc.rootfs.path" $cfg_dir/config 2>/dev/null || echo "lxc.rootfs.path = $container_rootfs" >> $cfg_dir/config
if [ $container_release_major != "4" ]; then
echo "lxc.cap.drop = sys_resource" >>$cfg_dir/config
fi
# systemd services like logind and journald need these
if [ $container_release_major != "7" ]; then
echo "lxc.cap.drop = setfcap setpcap" >>$cfg_dir/config
fi
echo "# Networking" >>$cfg_dir/config
# see if the default network settings were already specified
lxc_network_type=`grep '^lxc.net.0.type' $cfg_dir/config | awk -F'[= \t]+' '{ print $2 }'`
if [ -z "$lxc_network_type" ]; then
echo "lxc.net.0.type = veth" >>$cfg_dir/config
lxc_network_type=veth
fi
lxc_network_link=`grep '^lxc.net.0.link' $cfg_dir/config | awk -F'[= \t]+' '{ print $2 }'`
if [ -z "$lxc_network_link" ]; then
echo "lxc.net.0.link = lxcbr0" >>$cfg_dir/config
lxc_network_link=lxcbr0
fi
lxc_network_hwaddr=`grep '^lxc.net.0.hwaddr' $cfg_dir/config | awk -F'[= \t]+' '{ print $2 }'`
if [ -z "$lxc_network_hwaddr" ]; then
# generate a hwaddr for the container
# see http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
local hwaddr="00:16:3e:`dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 | \
head -n1 | awk '{print $2}' | cut -c1-6 | \
sed 's/\(..\)/\1:/g; s/.$//'`"
echo "lxc.net.0.hwaddr = $hwaddr" >>$cfg_dir/config
fi
lxc_network_flags=`grep '^lxc.net.0.flags' $cfg_dir/config | awk -F'[= \t]+' '{ print $2 }'`
if [ -z "$lxc_network_flags" ]; then
echo "lxc.net.0.flags = up" >>$cfg_dir/config
fi
cat <<EOF >> $cfg_dir/config || die "unable to create $cfg_dir/config"
lxc.net.0.name = eth0
lxc.net.0.mtu = 1500
EOF
}
container_rootfs_clone()
{
if is_btrfs_subvolume $template_rootfs; then
# lxc-create already made $container_rootfs a btrfs subvolume, but
# in this case we want to snapshot the original subvolume so we we
# have to delete the one that lxc-create made
btrfs subvolume delete $container_rootfs
btrfs subvolume snapshot $template_rootfs $container_rootfs || die "btrfs clone template"
else
echo "Copying rootfs ..."
cp -axT $template_rootfs $container_rootfs || die "copy template"
fi
}
container_rootfs_repo_create()
{
echo "# LXC generated .repo file" >$1
echo "[$2]" >>$1
echo "name=Oracle Linux $container_release_major.$container_release_minor ($basearch)" >>$1
echo "baseurl=$3/" >>$1
echo "enabled=1" >>$1
echo "skip_if_unavailable=1" >>$1
if [ "$4" != "" ]; then
echo "gpgkey=$yum_url/RPM-GPG-KEY-oracle-ol$container_release_major" >>$1
echo "gpgcheck=1" >>$1
else
echo "gpgcheck=0" >>$1
fi
}
container_rootfs_dev_create()
{
# create required devices. note that /dev/console will be created by lxc
# or libvirt itself to be a symlink to the right pty.
# take care to not nuke /dev in case $container_rootfs isn't set
dev_path="$container_rootfs/dev"
if [ $container_rootfs != "/" -a -d $dev_path ]; then
rm -rf $dev_path
fi
mkdir -p $dev_path
if can_chcon; then
# ensure symlinks created in /dev have the right context
chcon -t device_t $dev_path
fi
mknod -m 666 $dev_path/null c 1 3
mknod -m 666 $dev_path/zero c 1 5
mknod -m 666 $dev_path/random c 1 8
mknod -m 666 $dev_path/urandom c 1 9
mkdir -m 755 $dev_path/pts
mkdir -m 1777 $dev_path/shm
mknod -m 666 $dev_path/tty c 5 0
mknod -m 666 $dev_path/tty1 c 4 1
mknod -m 666 $dev_path/tty2 c 4 2
mknod -m 666 $dev_path/tty3 c 4 3
mknod -m 666 $dev_path/tty4 c 4 4
mknod -m 666 $dev_path/full c 1 7
mknod -m 600 $dev_path/initctl p
# set selinux labels same as host
if can_chcon; then
for node in null zero random urandom pts shm \
tty tty0 tty1 tty2 tty3 tty4 full ;
do
chcon --reference /dev/$node $dev_path/$node 2>/dev/null
done
fi
}
container_rootfs_create()
{
if can_chcon; then
chcon --reference / $container_rootfs 2>/dev/null
fi
cmds="rpm wget yum"
if [ $container_release_major -lt "6" ]; then
if [ $host_distribution = "Ubuntu" -o $host_distribution = "Debian" ]; then
db_dump_cmd="db5.1_dump"
fi
if [ $host_distribution = "OracleServer" -o \
$host_distribution = "Fedora" ]; then
db_dump_cmd="db_dump"
fi
cmds="$cmds $db_dump_cmd file"
fi
for cmd in $cmds; do
which $cmd >/dev/null 2>&1
if [ $? -ne 0 ]; then
die "The $cmd command is required, please install it"
fi
done
mkdir -p @LOCALSTATEDIR@/lock/subsys
(
flock -x 9
if [ $? -ne 0 ]; then
die "The template is busy."
fi
echo "Yum installing release $container_release_major.$container_release_minor for $basearch"
if [ -n "$repourl" ]; then
yum_url=$repourl
else
yum_url=http://public-yum.oracle.com
fi
if [ $container_release_major = "4" -o $container_release_major = "5" ]; then
latest_L="el"
latest_U="EL"
else
latest_L="ol"
latest_U="OL"
fi
if [ -n "$baseurl" ]; then
# create .repo pointing at baseurl
repo="lxc-install"
mkdir -p $container_rootfs/etc/yum.repos.d
container_rootfs_repo_create \
$container_rootfs/etc/yum.repos.d/lxc-install.repo $repo $baseurl
else
# get public-yum repo file
if [ $container_release_major = "4" ]; then
repofile=public-yum-el4.repo
elif [ $container_release_major = "5" ]; then
repofile=public-yum-el5.repo
elif [ $container_release_major = "6" ]; then
repofile=public-yum-ol6.repo
elif [ $container_release_major = "7" ]; then
repofile=public-yum-ol7.repo
else
die "Unsupported release $container_release_major"
fi
mkdir -p $container_rootfs/etc/yum.repos.d
wget -q $yum_url/$repofile -O $container_rootfs/etc/yum.repos.d/$repofile
if [ $? -ne 0 ]; then
die "Unable to download repo file $yum_url/$repofile, release unavailable"
fi
# yum will take $basearch from host, so force the arch we want
sed -i "s|\$basearch|$basearch|" $container_rootfs/etc/yum.repos.d/$repofile
# replace url if they specified one
if [ -n "$repourl" ]; then
sed -i "s|baseurl=http://public-yum.oracle.com/repo|baseurl=$repourl/repo|" $container_rootfs/etc/yum.repos.d/$repofile
sed -i "s|gpgkey=http://public-yum.oracle.com|gpgkey=$repourl|" $container_rootfs/etc/yum.repos.d/$repofile
fi
# disable all repos, then enable the repo for the version we are installing.
if [ $container_release_minor = "latest" ]; then
repo=$latest_L""$container_release_major"_"$container_release_minor
elif [ $container_release_major = "7" ]; then
repo="ol"$container_release_major"_u"$container_release_minor"_base"
elif [ $container_release_major = "6" ]; then
if [ $container_release_minor = "0" ]; then
repo="ol"$container_release_major"_ga_base"
else
repo="ol"$container_release_major"_u"$container_release_minor"_base"
fi
elif [ $container_release_major = "5" ]; then
if [ $container_release_minor = "0" ]; then
repo="el"$container_release_major"_ga_base"
elif [ $container_release_minor -lt "6" ]; then
repo="el"$container_release_major"_u"$container_release_minor"_base"
else
repo="ol"$container_release_major"_u"$container_release_minor"_base"
fi
elif [ $container_release_major = "4" -a $container_release_minor -gt "5" ]; then
repo="el"$container_release_major"_u"$container_release_minor"_base"
else
die "Unsupported release $container_release_major.$container_release_minor"
fi
sed -i "s|enabled=1|enabled=0|" $container_rootfs/etc/yum.repos.d/$repofile
sed -i "/\[$repo\]/,/\[/ s/enabled=0/enabled=1/" $container_rootfs/etc/yum.repos.d/$repofile
fi
container_rootfs_dev_create
# don't put devpts,proc, nor sysfs in here, it will already be mounted for us by lxc/libvirt
echo "" >$container_rootfs/etc/fstab
# create rpm db, download and yum install minimal packages
mkdir -p $container_rootfs/var/lib/rpm
rpm --root $container_rootfs --initdb
yum_args="--installroot $container_rootfs --disablerepo=* --enablerepo=$repo -y --nogpgcheck"
min_pkgs="yum initscripts passwd rsyslog vim-minimal openssh-server openssh-clients dhclient chkconfig rootfiles policycoreutils oraclelinux-release"
if [ $container_release_major -lt "6" ]; then
min_pkgs="$min_pkgs db4-utils"
fi
# we unshare the mount namespace because yum installing the ol4
# packages causes $rootfs/proc to be mounted on
lxc-unshare -s MOUNT yum -- $yum_args install $min_pkgs $user_pkgs
if [ $? -ne 0 ]; then
die "Failed to download and install the rootfs, aborting."
fi
# rsyslog and pam depend on coreutils for some common commands in
# their POSTIN scriptlets, but coreutils wasn't installed yet. now
# that coreutils is installed, reinstall the packages so their POSTIN
# runs right. similarly, libutempter depends on libselinux.so.1 when
# it runs /usr/sbin/groupadd, so reinstall it too
redo_pkgs=""
if [ $container_release_major = "5" ]; then
if [ $container_release_minor = "latest" ]; then
redo_pkgs="pam rsyslog libutempter"
elif [ $container_release_minor -lt 2 ]; then
redo_pkgs="pam"
elif [ $container_release_minor -lt 6 ]; then
redo_pkgs="pam rsyslog"
elif [ $container_release_minor -gt 5 ]; then
redo_pkgs="pam rsyslog libutempter"
fi
fi
# shadow utils fails on ol4 and ol6.1
if [ $container_release_major = "4" -o \
$container_release_major = "6" -a $container_release_minor = "1" ]; then
redo_pkgs="shadow-utils"
fi
if [ x"$redo_pkgs" != x ]; then
rpm --root $container_rootfs --nodeps -e $redo_pkgs
lxc-unshare -s MOUNT yum -- $yum_args install $redo_pkgs
if [ $? -ne 0 ]; then
die "Unable to reinstall packages"
fi
fi
# if installing from a baseurl, create a .repo that the container
# can use to update to _latest from http://public-yum.oracle.com
if [ -n "$baseurl" ]; then
container_rootfs_repo_create \
"$container_rootfs/etc/yum.repos.d/public-yum-"$latestL""$container_release_major".repo" \
$latest_L""$container_release_major"_latest" \
$yum_url"/repo/OracleLinux/"$latest_U""$container_release_major"/latest/$basearch" gpg
fi
# these distributions put the rpm database in a place the guest is
# not expecting it, so move it
if [ $host_distribution = "Ubuntu" -o $host_distribution = "Debian" ]; then
mv $container_rootfs/$HOME/.rpmdb/* $container_rootfs/var/lib/rpm
fi
# if the native rpm created the db with Hash version 9, we need to
# downgrade it to Hash version 8 for use with OL5.x
db_version=`file $container_rootfs/var/lib/rpm/Packages | \
grep -o 'version [0-9]*' |awk '{print $2}'`
if [ $container_release_major -lt "6" -a $db_version != "8" ]; then
echo "Fixing (downgrading) rpm database from version $db_version"
rm -f $container_rootfs/var/lib/rpm/__db*
for db in $container_rootfs/var/lib/rpm/* ; do
$db_dump_cmd $db |chroot $container_rootfs db_load /var/lib/rpm/`basename $db`.new
mv $db.new $db
done
fi
# the host rpm may not be the same as the guest, rebuild the db with
# the guest rpm version
echo "Rebuilding rpm database"
rm -f $container_rootfs/var/lib/rpm/__db*
chroot $container_rootfs rpm --rebuilddb >/dev/null 2>&1
) 9>@LOCALSTATEDIR@/lock/subsys/lxc-oracle-$name
if [ $? -ne 0 ]; then
exit 1
fi
}
container_release_get()
{
if [ -f $1/etc/oracle-release ]; then
container_release_version=`cat $1/etc/oracle-release |awk '/^Oracle/ {print $5}'`
container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
elif grep -q "Enterprise Linux AS" $1/etc/redhat-release; then
container_release_major=`cat $1/etc/redhat-release |awk '{print $7}'`
container_release_minor=`cat $1/etc/redhat-release |awk '{print $10}' |tr -d ")"`
container_release_version="$container_release_major.$container_release_minor"
elif grep -q "Enterprise Linux Server" $1/etc/redhat-release; then
container_release_version=`cat $1/etc/redhat-release |awk '{print $7}'`
container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
else
echo "Unable to determine container release version"
exit 1
fi
}
usage()
{
cat <<EOF
-a|--arch=<arch> architecture (ie. i386, x86_64)
-R|--release=<release> release to download for the new container
--rootfs=<path> rootfs path
-r|--rpms=<rpm name> additional rpms to install into container
-u|--url=<url> replace yum repo url (ie. Oracle public-yum mirror)
--baseurl=<url> use package repository (ie. file:///mnt)
arch and release must also be specified
-t|--templatefs=<path> copy/clone rootfs at path instead of downloading
-P|--patch=<path> only patch the rootfs at path for use as a container
-h|--help
Release is of the format "major.minor", for example "5.8", "6.3", or "6.latest"
This template supports Oracle Linux releases 4.6 - 7.0
EOF
return 0
}
options=$(getopt -o hp:n:a:R:r:u:t: -l help,rootfs:,path:,name:,arch:,release:,rpms:,url:,templatefs:,patch:,baseurl: -- "$@")
if [ $? -ne 0 ]; then
usage $(basename $0)
exit 1
fi
eval set -- "$options"
while true
do
case "$1" in
-h|--help) usage $0 && exit 0;;
-p|--path) cfg_dir=$2; shift 2;;
--rootfs) container_rootfs=$2; shift 2;;
-n|--name) name=$2; shift 2;;
-a|--arch) arch=$2; shift 2;;
-R|--release) container_release_version=$2; shift 2;;
-r|--rpms) user_pkgs=$2; shift 2;;
-u|--url) repourl=$2; shift 2;;
-t|--templatefs) template_rootfs=$2; shift 2;;
--patch) patch_rootfs=$2; shift 2;;
--baseurl) baseurl=$2; shift 2;;
--) shift 1; break ;;
*) break ;;
esac
done
# make sure mandatory args are given and valid
if [ "$(id -u)" != "0" ]; then
echo "This script should be run as 'root'"
exit 1
fi
if [ -n "$baseurl" ]; then
if [ "$arch" = "" -o "$container_release_version" = "" ]; then
echo "The --arch and --release must be specified when using --baseurl"
usage
exit 1
fi
fi
if [ "$arch" = "" ]; then
arch=$(uname -m)
fi
if [ -n "$patch_rootfs" ]; then
container_rootfs="$patch_rootfs"
container_release_get $container_rootfs
container_rootfs_patch
exit 0
fi
if [ -z $name ]; then
echo "Container name must be given"
usage
exit 1
fi
if [ -z $cfg_dir ]; then
echo "Configuration directory must be given, check lxc-create"
usage
exit 1
fi
basearch=$arch
if [ "$arch" = "i686" ]; then
basearch="i386"
fi
if [ "$arch" != "i386" -a "$arch" != "x86_64" ]; then
echo "Bad architecture given, check lxc-create"
usage
exit 1
fi
if which lsb_release >/dev/null 2>&1; then
host_distribution=`lsb_release --id |awk '{print $3}'`
host_release_version=`lsb_release --release |awk '{print $2}'`
host_release_major=`echo $host_release_version |awk -F '.' '{print $1}'`
host_release_minor=`echo $host_release_version |awk -F '.' '{print $2}'`
else
if [ -f /etc/fedora-release ]; then
host_distribution="Fedora"
host_release_version=`cat /etc/fedora-release |awk '{print $3}'`
host_release_major=$host_release_version
host_release_minor=0
elif [ -f /etc/oracle-release ]; then
host_distribution="OracleServer"
host_release_version=`cat /etc/oracle-release |awk '{print $5}'`
host_release_major=`echo $host_release_version |awk -F '.' '{print $1}'`
host_release_minor=`echo $host_release_version |awk -F '.' '{print $2}'`
else
echo "Unable to determine host distribution, ensure lsb_release is installed"
exit 1
fi
fi
echo "Host is $host_distribution $host_release_version"
if [ -z "$container_rootfs" ]; then
container_rootfs="$cfg_dir/rootfs"
fi
if [ -n "$template_rootfs" ]; then
container_release_get $template_rootfs
else
if [ -z "$container_release_version" ]; then
if [ $host_distribution = "OracleServer" ]; then
container_release_version=$host_release_version
else
echo "No release specified with -R, defaulting to 6.5"
container_release_version="6.5"
fi
fi
container_release_major=`echo $container_release_version |awk -F '.' '{print $1}'`
container_release_minor=`echo $container_release_version |awk -F '.' '{print $2}'`
fi
container_config_create
if [ -n "$template_rootfs" ]; then
container_rootfs_clone
else
container_rootfs_create
fi
container_release_get $container_rootfs
container_rootfs_configure
echo "Container : $container_rootfs"
echo "Config : $cfg_dir/config"
echo "Network : eth0 ($lxc_network_type) on $lxc_network_link"