This is a new template to create containers based on an Oracle Linux
rootfs image. The path to the rootfs must be given to the template,
and if it resides on a btrfs will be snapshoted rather than copied.
Signed-off-by: Dwight Engen <dwight.en...@oracle.com>
---
configure.ac | 1 +
templates/Makefile.am | 1 +
templates/lxc-ol.in | 382 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 384 insertions(+), 0 deletions(-)
create mode 100644 templates/lxc-ol.in
diff --git a/configure.ac b/configure.ac
index 4bbfd9b..e7356eb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -197,6 +197,7 @@ AC_CONFIG_FILES([
templates/lxc-opensuse
templates/lxc-busybox
templates/lxc-fedora
+ templates/lxc-ol
templates/lxc-altlinux
templates/lxc-sshd
templates/lxc-archlinux
diff --git a/templates/Makefile.am b/templates/Makefile.am
index d6b3892..d32b9c8 100644
--- a/templates/Makefile.am
+++ b/templates/Makefile.am
@@ -7,6 +7,7 @@ templates_SCRIPTS = \
lxc-ubuntu-cloud \
lxc-opensuse \
lxc-fedora \
+ lxc-ol \
lxc-altlinux \
lxc-busybox \
lxc-sshd \
diff --git a/templates/lxc-ol.in b/templates/lxc-ol.in
new file mode 100644
index 0000000..e8cfc6a
--- /dev/null
+++ b/templates/lxc-ol.in
@@ -0,0 +1,382 @@
+#!/bin/bash
+#
+# Template script for generating Oracle Enterprise Linux container for LXC
+# based on lxc-fedora, lxc-ubuntu
+#
+# Copyright © 2011 Wim Coekaerts <wim.coekae...@oracle.com>
+# Copyright © 2012 Dwight Engen <dwight.en...@oracle.com>
+#
+# Modified for Oracle Linux 5
+# Wim Coekaerts <wim.coekae...@oracle.com>
+#
+# Modified for Oracle Linux 6, combined OL5,6 into one template script
+# Dwight Engen <dwight.en...@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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+# use virbr0 that is setup by default by libvirtd
+lxc_network_type=veth
+lxc_network_link=virbr0
+
+die()
+{
+ echo "failed: $1"
+ cleanup
+}
+
+cleanup()
+{
+ echo "Cleaning up"
+ lxc-destroy -n $name
+
+ # normally lxc-destroy will delete the btrfs subvolume, but if we're
+ # interrupted before the config is setup it might not, so we will
+ # try to cleanup ourselves
+ container_rootfs_delete()
+
+ # take care to not nuke / in case $cfg_dir isn't set
+ if [ $cfg_dir != "/" -a -d $cfg_dir ]; then
+ rm -rf $cfg_dir
+ fi
+ exit 1
+}
+
+container_rootfs_create()
+{
+ if [ -n $btrfs_subvolume ]; then
+ btrfs subvolume snapshot $template_rootfs $container_rootfs || die
"btrfs clone template"
+ else
+ cp -ax $template_rootfs $container_rootfs || die "copy template"
+ fi
+}
+
+container_rootfs_delete()
+{
+ if [ -n $btrfs_subvolume ]; then
+ btrfs subvolume delete $container_rootfs >/dev/null 2>&1
+ else
+ rm -rf $container_rootfs
+ fi
+}
+
+# fix up the container_rootfs
+container_rootfs_configure()
+{
+ echo "Configuring container for OEL major version $container_release_major"
+
+ # "disable" selinux. init in OEL 5 honors /etc/selinux/config. 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)
+ mkdir -p $container_rootfs/selinux
+ echo 0 > $container_rootfs/selinux/enforce
+ sed -i 's|SELINUX=enforcing|SELINUX=disabled|'
$container_rootfs/etc/selinux/config
+ if [ $container_release_major = "5" ]; then
+ sed -i 's|session[ ]*required[ ]*pam_selinux.so[ ]*close|#session
required pam_selinux.so close|' $container_rootfs/etc/pam.d/login
+ sed -i 's|session[ ]*required[ ]*pam_selinux.so[ ]*open|#session
required pam_selinux.so open|' $container_rootfs/etc/pam.d/login
+ fi
+
+ # 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=$name
+NM_CONTROLLED=no
+TYPE=Ethernet
+EOF
+
+ # set the hostname
+ 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" > $container_rootfs/etc/hosts
+
+ # disable ipv6
+ echo "blacklist ipv6" >>$container_rootfs/etc/modprobe.d/blacklist.conf
+ echo "blacklist net-pf-10"
>>$container_rootfs/etc/modprobe.d/blacklist.conf
+ rm $container_rootfs/etc/sysconfig/network-scripts/init.ipv6-global
+
+ cat <<EOF > $container_rootfs/etc/fstab
+proc /proc proc nodev,noexec,nosuid 0 0
+devpts /dev/pts devpts defaults 0 0
+sysfs /sys sysfs defaults 0 0
+EOF
+
+ # remove module stuff for iptables it just shows errors that are not
+ # relevant in a container
+ if [ -f "$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" ]; then
+ rm -f $container_root/etc/init/readahead-collector.conf
+ rm -f $container_root/etc/init/readahead-disable-services.conf
+ sed -i 's|READAHEAD="yes"|READAHEAD="no"|'
$container_rootfs/etc/sysconfig/readahead
+ fi
+
+ # disable udev in the container
+ sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.sysinit
+ sed -i 's|.sbin.start_udev||' $container_rootfs/etc/rc.d/rc.sysinit
+
+ # disable nash raidautorun in the container since no /dev/md*
+ if [ $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 = "5" ]; then
+ rm $container_rootfs/etc/sysconfig/keyboard
+ fi
+
+ # dont start lvm
+ sed -i 's|action $"Setting up Logical Volume Management:"|#action
$"Setting up Logical Volume Management:"|' $container_rootfs/etc/rc.sysinit
+ sed -i 's|action $"Setting up Logical Volume Management:"|/bin/true
#action $"Setting up Logical Volume Management:"|'
$container_rootfs/etc/rc.d/rc.sysinit
+
+ # 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_root/etc/init/plymouth-shutdown.conf
+ rm -f $container_root/etc/init/quit-plymouth.conf
+ rm -f $container_root/etc/init/splash-manager.conf
+
+ # setup console and tty[1-4] for login. note that /dev/console and
+ # /dev/tty[1-4] will be symlinks to the ptys /dev/lxc/console and
+ # /dev/lxc/tty[1-4] so that package updates can overwrite the symlinks.
+ # lxc will maintain these links and bind mount ptys over /dev/lxc/*
+ # since lxc.devttydir is specified in the config.
+
+ # allow root login on console and tty[1-4]
+ echo "# LXC (Linux Containers)" >>$container_rootfs/etc/securetty
+ echo "lxc/console" >>$container_rootfs/etc/securetty
+ echo "lxc/tty1" >>$container_rootfs/etc/securetty
+ echo "lxc/tty2" >>$container_rootfs/etc/securetty
+ echo "lxc/tty3" >>$container_rootfs/etc/securetty
+ echo "lxc/tty4" >>$container_rootfs/etc/securetty
+
+ # 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
+
+ # start a getty on /dev/console, /dev/tty[1-4]
+ if [ $container_release_major = "5" ]; then
+ sed -i '/1:2345:respawn/i cns:2345:respawn:/sbin/mingetty 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]
+
+respawn
+exec /sbin/mingetty /dev/console
+EOF
+ 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 auditd autofs cpuspeed dund gpm haldaemon hidd \
+ ip6tables irqbalance iscsi iscsid isdn kdump kudzu \
+ lm_sensors lvm2-monitor mdmonitor microcode_ctl \
+ ntpd postfix sendmail udev-post ;
+ do
+ chroot $container_rootfs chkconfig 2>/dev/null $service off
+ done
+
+ # create required devices
+ # 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
+ mkdir -p $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/tty0 c 4 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 600 $dev_path/console c 5 1
+ mknod -m 666 $dev_path/full c 1 7
+ mknod -m 600 $dev_path/initctl p
+
+ # 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
+
+ # start with a clean /var/log/messages
+ rm $container_rootfs/var/log/messages
+
+ # add oracle user, set root password
+ chroot $container_rootfs useradd --create-home -s /bin/bash oracle
+ echo "oracle:oracle" | chroot $container_rootfs chpasswd
+ echo "root:toor" | chroot $container_rootfs chpasswd
+ echo -e "Added container user:\033[1moracle\033[0m
password:\033[1moracle\033[0m"
+ echo -e "Added container user:\033[1mroot\033[0m
password:\033[1mtoor\033[0m"
+}
+
+# create the container's lxc config file
+container_config_create()
+{
+ echo "Create configuration file $cfg_dir/config"
+ # generate a hwaddr for the container with a high mac address
+ # see
http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
+ local hwaddr="fe:`dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 | \
+ head -1 |awk '{print $2}' | cut -c1-10 |\
+ sed 's/\(..\)/\1:/g; s/.$//'`"
+ mkdir -p $cfg_dir || die "unable to create config dir $cfg_dir"
+ rm -f $cfg_dir/config
+ cat <<EOF >> $cfg_dir/config || die "unable to create $cfg_dir/config"
+# Container configuration for $container_release_full
+lxc.utsname = $name
+lxc.devttydir = lxc
+lxc.tty = 4
+lxc.pts = 1024
+lxc.rootfs = $container_rootfs
+lxc.mount = $cfg_dir/fstab
+# Networking
+lxc.network.type = $lxc_network_type
+lxc.network.flags = up
+lxc.network.link = $lxc_network_link
+lxc.network.name = eth0
+lxc.network.mtu = 1500
+lxc.network.hwaddr = $hwaddr
+# Control Group devices: all denied except those whitelisted
+lxc.cgroup.devices.deny = a
+lxc.cgroup.devices.allow = c 1:3 rwm # /dev/null
+lxc.cgroup.devices.allow = c 1:5 rwm # /dev/zero
+lxc.cgroup.devices.allow = c 1:7 rwm # /dev/full
+lxc.cgroup.devices.allow = c 5:0 rwm # /dev/tty
+lxc.cgroup.devices.allow = c 1:8 rwm # /dev/random
+lxc.cgroup.devices.allow = c 1:9 rwm # /dev/urandom
+lxc.cgroup.devices.allow = c 136:* rwm # /dev/tty[1-4] ptys and lxc console
+lxc.cgroup.devices.allow = c 5:2 rwm # /dev/ptmx pty master
+lxc.cgroup.devices.allow = c 254:0 rwm # /dev/rtc0
+EOF
+
+ cat <<EOF > $cfg_dir/fstab || die "unable to create $cfg_dir/fstab"
+proc $container_rootfs/proc proc nodev,noexec,nosuid 0 0
+devpts $container_rootfs/dev/pts devpts defaults 0 0
+sysfs $container_rootfs/sys sysfs defaults 0 0
+EOF
+}
+
+usage()
+{
+ cat <<EOF
+ -t|--templatefs=<path> (mandatory: path to template rootfs)
+ -r|--rootfs=<path> (container rootfs path, defaults to templatefs dir)
+ -h|--help
+EOF
+ return 0
+}
+
+options=$(getopt -o hp:n:t:r: -l help,path:,name:,template:,rootfs: -- "$@")
+if [ $? -ne 0 ]; then
+ usage $(basename $0)
+ exit 1
+fi
+
+eval set -- "$options"
+while true
+do
+ case "$1" in
+ -p|--path) cfg_dir=$2; shift 2;;
+ -n|--name) name=$2; shift 2;;
+ -t|--templatefs) template_rootfs=$2; shift 2;;
+ -r|--rootfs) container_rootfs=$2; shift 2;;
+ -h|--help) usage $0 && exit 0;;
+ --) shift 1; break ;;
+ *) break ;;
+ esac
+done
+
+# make sure mandatory args are given and valid
+if [ "$(id -u)" != "0" ]; then
+ echo "This script should be run as 'root'"
+ exit 1
+fi
+
+if [ -z $name ]; then
+ echo "Container name must be given"
+ usage
+ exit 1
+fi
+
+if [ -z $cfg_dir ]; then
+ echo "Cofiguration directory must be given, check lxc-create"
+ usage
+ exit 1
+fi
+
+if [ -z $template_rootfs ]; then
+ echo "Template filesystem rootfs must be specified"
+ usage
+ exit 1
+fi
+
+if [ ! -d $template_rootfs ]; then
+ echo "Template filesystem $template_rootfs does not exist, set up a
container template first."
+ exit 1
+fi
+
+if which btrfs >/dev/null 2>&1 && btrfs subvolume list $template_rootfs
>/dev/null 2>&1; then
+ btrfs_subvolume=1
+fi
+
+trap cleanup SIGHUP SIGINT SIGTERM
+
+if [ -z $container_rootfs ]; then
+ container_rootfs=`dirname $template_rootfs`/$name
+fi
+container_release_full=`cat $template_rootfs/etc/oracle-release`
+container_release_version=`cat $template_rootfs/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}'`
+
+container_config_create
+container_rootfs_create
+container_rootfs_configure
+
+echo "Container : $container_rootfs"
+echo "Template : $template_rootfs"
+echo "Config : $cfg_dir/config"
+echo "Network : eth0 ($lxc_network_type) on $lxc_network_link"
--
1.7.1
------------------------------------------------------------------------------
Got visibility?
Most devs has no idea what their production app looks like.
Find out how fast your code is with AppDynamics Lite.
http://ad.doubleclick.net/clk;262219671;13503038;y?
http://info.appdynamics.com/FreeJavaPerformanceDownload.html
_______________________________________________
Lxc-devel mailing list
Lxc-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/lxc-devel
