[lxc-devel] [PATCH] gentoo template
Guillaume ZITTA
lxc at zitta.fr
Sat Jan 11 11:40:14 UTC 2014
Template for Gentoo Linux
Signed-off-by: gza <lxc at zitta.fr>
---
configure.ac | 1 +
templates/Makefile.am | 3 +-
templates/lxc-gentoo.in | 864
++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 867 insertions(+), 1 deletion(-)
create mode 100644 templates/lxc-gentoo.in
diff --git a/configure.ac b/configure.ac
index cbaa38b..ec7d835 100644
--- a/configure.ac
+++ b/configure.ac
@@ -644,6 +644,7 @@ AC_CONFIG_FILES([
templates/lxc-archlinux
templates/lxc-alpine
templates/lxc-plamo
+ templates/lxc-gentoo
src/Makefile
src/lxc/Makefile
diff --git a/templates/Makefile.am b/templates/Makefile.am
index abdca6f..168a999 100644
--- a/templates/Makefile.am
+++ b/templates/Makefile.am
@@ -15,4 +15,5 @@ templates_SCRIPTS = \
lxc-archlinux \
lxc-alpine \
lxc-cirros \
- lxc-plamo
+ lxc-plamo \
+ lxc-gentoo
diff --git a/templates/lxc-gentoo.in b/templates/lxc-gentoo.in
new file mode 100644
index 0000000..fba4ad1
--- /dev/null
+++ b/templates/lxc-gentoo.in
@@ -0,0 +1,864 @@
+#!/bin/bash
+
+###############################################################################
+#
+# LXC template for gentoo
+#
+# Widely inspired from lxc-gentoo script at
https://github.com/globalcitizen/lxc-gentoo
+#
+# this version is reworked with :
+# - out of the lxc-create compat
+# - vanilla gentoo config
+# - ready to use cache
+#
+# TODOLIST:
+# - test all options
+# - re test all options
+# - wait for gentoo #496054
+# - wait for response to LXC proposal
http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006771.html
+# - added bash version of this feature here
+#
+###############################################################################
+
+# Ensure strict root's umask doesen't render the VM unusable
+umask 022
+
+################################################################################
+# Various helper functions
+################################################################################
+
+# param: $1: the name of the lock
+# param: $2: the timeout for the lock
+# The rest contain the command to execute and its parameters
+execute_exclusively()
+{
+ mkdir -p @LOCALSTATEDIR@/lock/subsys/
+
+ local lock_name="$1"
+ local timeout="$2"
+ shift 2
+
+ {
+ printf "Attempting to obtain an exclusive lock (timeout: %s sec)
named \"%s\"...\n" "${timeout}" "$lock_name"
+
+ flock -x -w "${timeout}" 50
+
+ if [[ $? -ne 0 ]]; then
+ printf " => unable to obtain lock, aborting.\n"
+ return 2
+ else
+ printf " => done.\n"
+ fi
+
+ printf " => Executing \"%s\"\n" "$*"
+ "$@"
+ retval=$?
+ } 50> "@LOCALSTATEDIR@/lock/subsys/lxc-gentoo-${lock_name}"
+ return $retval
+}
+
+# a die function is always a good idea
+die()
+{
+ printf "\n[the last exit code leading to this death was: %s ]\n" "$?"
+ local retval="$1"
+ shift 1
+ printf "$@"
+ exit "$retval"
+}
+
+# gentoo arch/variant detection
+set_default_arch()
+{
+ printf "### set_default_arch: default arch/variant autodetect...\n"
+ arch=$(arch)
+ if [[ $arch =~ i.86 ]]; then
+ arch="x86"
+ variant="x86"
+ elif [[ $arch == "x86_64" ]]; then
+ arch="amd64"
+ variant="amd64"
+ elif [[ $arch =~ arm.* ]]; then
+ arch="arm"
+ variant="armv7a"
+ else
+ #who knows, it may work...
+ printf " => warn: unexpected arch:${arch} let me knows if it works
:)\n"
+ variant="${arch}"
+ fi
+ printf " => Got: arch=%s variant=%s\n" "${arch}" "${variant}"
+}
+
+store_user_message()
+{
+ user_message="${user_message}=> $@\n"
+}
+
+################################################################################
+# CACHE Preparation
+################################################################################
+# during setup cachedir is $cacheroot/partial-$arch-$variant
+# at the end, it will be $cacheroot/rootfs-$arch-$variant
+
+cache_setup(){
+ partialfs="${cacheroot}/partial-${arch}-${variant}"
+
+ #if cache exists and flush not needed, return
+ [[ -d "${cachefs}" && -z "${flush_cache}" ]] && return 0
+
+ printf "###### cache_setup(): doing cache preparation\n"
+ local retval=1
+
+ #clean from failed previous run
+ rm -rf "${partialfs}"
+ mkdir -p "${partialfs}"
+
+ #let's go
+ cache_precheck && \
+ cache_stage3 && \
+ cache_portage && \
+ cache_inittab && \
+ cache_net && \
+ cache_dev && \
+ cache_openrc && \
+ rm -rf "${cachefs}" && \
+ mv "${partialfs}" "${cachefs}" && \
+ printf "###### cache_setup: Cache should be ready\n"
+
+ return $?
+}
+
+cache_precheck()
+{
+ printf "### cache_precheck(): doing some pre-start checks ...\n"
+ # never hurts to have a fail-safe.
+ [[ -n "${cacheroot//\/}" ]] \
+ || die 8 "\$cacheroot (%s) IS EMPTY OR MADE OF ONLY DIRECTORY
SEPERATORS, THIS IS *VERY* BAD!\n" "${cacheroot}"
+}
+
+#get latest stage3 tarball
+cache_stage3()
+{
+ printf "### cache_stage3(): stage3 cache deployment...\n"
+
+ if [ -z "${tarball}" ]; then
+ #variables init
+ local stage3_baseurl="${mirror}/releases/${arch}/autobuilds"
+
+ # get latest-stage3....txt file for subpath
+ local stage3_pointer="${stage3_baseurl}/latest-stage3-${variant}.txt"
+
+ printf "Determining path to latest Gentoo %s (%s) stage3
archive...\n" "${arch}" "${variant}"
+ printf " => downloading and processing %s\n" "${stage3_pointer}"
+
+ local stage3_latest_tarball=$(wget -q -O - "${stage3_pointer}" | tail
-n1 ) \
+ || die 6 "Error: unable to fetch\n"
+
+ printf " => Got: %s\n" "${stage3_latest_tarball}"
+
+ printf "Downloading/untarring the actual stage3 tarball...\n"
+ wget -O - "${stage3_baseurl}/${stage3_latest_tarball}" | tar -xjpf -
-C "${partialfs}" \
+ || die 6 "Error: unable to fetch or untar\n"
+ printf " => extracted to: %s\n" "${partialfs}"
+ else
+ printf "Extracting the stage3 tarball...\n"
+ tar -xpf "${tarball}" -C "${partialfs}" || die 6 "unable to untar
${tarball} to ${partialfs}"
+ fi
+
+ #check if it chroots
+ printf "chroot test..."
+ chroot ${partialfs} /bin/true || die 1 "Error: chroot %s /bin/true,
failed" "${partialfs}"
+ printf " OK\n"
+ printf " => stage3 cache extracted in : %s\n" "${partialfs}"
+ return 0
+}
+
+cache_portage()
+{
+ printf "### cache_portage: caching portage tree tarball...\n"
+ [[ -z "${flush_cache}" && -f "${portage_cache}" ]] && return 0
+
+ rm -f ${portage_cache}
+
+ printf "Downloading Gentoo portage (software build database)
snapshot...\n"
+ execute_exclusively portage 60 wget -O "${portage_cache}"
"${mirror}/snapshots/portage-latest.tar.bz2" \
+ || die 6 "Error: unable to fetch\n"
+ printf " => done.\n"
+}
+
+# custom inittab
+cache_inittab()
+{
+ printf "### cache_inittab: tuning inittab...\n"
+
+ INITTAB="${partialfs}/etc/inittab"
+
+ [[ -w "$INITTAB" ]] || die 1 "Error: $INITTAB is not writeable"
+
+ # create console
+ echo "# Lxc main console" >> "$INITTAB"
+ echo "1:12345:respawn:/sbin/agetty -a root --noclear 115200 console
linux" >> "$INITTAB"
+
+ # finally we add a pf line to enable clean shutdown on SIGPWR (issue
60)
+ echo "# clean container shutdown on SIGPWR" >> "$INITTAB"
+ echo "pf:12345:powerwait:/sbin/halt" >> "$INITTAB"
+
+ # we also blank out /etc/issue here in order to prevent delays
spawning login
+ # caused by attempts to determine domainname on disconnected
containers
+ sed -i 's/[\][Oo]//g' "${partialfs}/etc/issue"
+}
+
+cache_net()
+{
+ printf "### cache_net: doing some useful net tuning...\n"
+ # useful for chroot
+ # /etc/resolv.conf
+ grep -i 'search ' /etc/resolv.conf > "${partialfs}/etc/resolv.conf"
+ grep -i 'nameserver ' /etc/resolv.conf >>
"${partialfs}/etc/resolv.conf"
+
+ # fix boot-time interface config wipe under aggressive cap drop
+ # (openrc 0.9.8.4 ~sep 2012 -
https://bugs.gentoo.org/show_bug.cgi?id=436266)
+ # initial warkaround was: sed -i -e
's/^#rc_nostop=""/rc_nostop="net.eth0 net.lo"/'
"${partialfs}/etc/rc.conf"
+ # but this one does not depends on interfaces names
+ echo 'rc_keyword="-stop"' >> "${partialfs}/etc/conf.d/net"
+}
+
+cache_dev()
+{
+ printf "### cache_dev(): /dev tuning...\n"
+
+ #Wait for https://bugs.gentoo.org/show_bug.cgi?id=496054
+ mkdir "${partialfs}/dev/pts"
+
+ if [ -n "${nettun}" ]; then
+ mkdir -m 755 "${partialfs}/net"
+ mknod -m 666 "${partialfs}/net/tun" c 10 200
+ fi
+
+ return 0
+}
+
+# fix openrc system
+cache_openrc()
+{
+ printf "### cache_openrc(): doing openrc tuning\n"
+
+ #Wait for https://bugs.gentoo.org/show_bug.cgi?id=496054
+ chroot "${partialfs}" sed s/-lxc//g -i "/etc/init.d/devfs"
+
+ return 0
+}
+
+################################################################################
+# CONTAINER Preparation
+################################################################################
+
+container_setup() {
+ printf "##### container_setup(): starting container setup\n"
+
+ #in most cases lxc-create should have provided a copy of default
lxc.conf
+ #let's tag where template starts, or just create the files
+ echo '### lxc-gentoo template stuff starts here' >> "$path/config"
+
+ #Determine rootfs
+ #If backingstore was specified, lxc.rootfs should be present or
--rootfs did the rootfs var creation
+ if [ -z "${rootfs}" ]; then
+ rootfs=`awk -F= '$1 ~ /^lxc.rootfs/ { print $2 }' "$path/config"
2>/dev/null`
+ if [ -z "${rootfs}" ]; then
+ #OK it's default
+ rootfs="${path}/rootfs"
+ fi
+ fi
+ store_user_message "rootfs of container is : ${rootfs}"
+ store_user_message "config of container is : ${path}/config"
+
+ container_precheck && \
+ container_rootfs && \
+ container_consoles && \
+ container_tz && \
+ container_portage && \
+ container_net && \
+ container_hostname && \
+ container_auth && \
+ container_conf
+ if [ $? -ne 0 ]; then
+ die 1 "container_setup(): one step didn't complete, sorry\n"
+ fi
+
+ printf "###### container_setup(): container should be ready to
start!\n"
+ printf "\n\n"
+ printf "You could now use you container with: lxc-start -n %s\n"
"${name}"
+ printf "little things you should know about your container:\n"
+ printf "${user_message}"
+ return 0
+}
+
+container_precheck()
+{
+ printf "### container_precheck(): doing some pre-start checks ...\n"
+ # never hurts to have a fail-safe.
+ [[ -n "${name//\/}" ]] \
+ || die 8 "\$name (%s) IS EMPTY OR MADE OF ONLY DIRECTORY SEPERATORS,
THIS IS *VERY* BAD!\n" "${name}"
+
+ [[ -n "${rootfs//\/}" ]] \
+ || die 8 "\$rootfs (%s) IS EMPTY OR MADE OF ONLY DIRECTORY
SEPERATORS, THIS IS *VERY* BAD!\n" "${rootfs}"
+
+ [[ -n "${cachefs//\/}" ]] \
+ || die 8 "\$cachefs (%s) IS EMPTY OR MADE OF ONLY DIRECTORY
SEPERATORS, THIS IS *VERY* BAD!\n" "${cachefs}"
+
+ # check if the rootfs already exists
+ [[ -d "${rootfs}/etc" ]] && die 18 "Error: \$rootfs (%s) already
exists!" "${rootfs}"
+
+ # check cache
+ [[ ! -d "${cachefs}/etc" ]] && die 1 "Error: \$cachefs (%s) not
found!" "${cachefs}"
+
+ return 0
+}
+
+container_rootfs()
+{
+ printf "#### container_rootfs(): copying rootfs %s from cache %s
...\n" "${rootfs}" "${cachefs}"
+ tar -c -f - -C "${cachefs}" . | tar -x -p -f - -C "${rootfs}" || die 1
"Error: cache copy to rootfs failed"
+
+ printf "chroot test..."
+ chroot "${rootfs}" /bin/true || die 1 "Error: 'chroot %s /bin/true'
failed"
+ printf " OK\n"
+
+ printf " => done\n"
+ return 0
+}
+
+container_consoles() {
+ printf "#### container_consoles(): setting container consoles ...\n"
+
+ # disable unwanted ttys
+ if [[ ${tty} < 6 ]]; then
+ local mindis=$(( ${tty} + 1 ))
+ sed -i "s/^c[${mindis}-6]/#&/" "${rootfs}/etc/inittab"
+ fi
+ printf " => main console + ${tty} ttys\n"
+
+ if [[ -z "${autologin}" ]]; then
+ sed 's/agetty -a root/agetty/' -i "${rootfs}/etc/inittab"
+ elif [[ "${user}" != "root" ]]; then
+ sed "s/agetty -a root/agetty -a ${user}/" -i "${rootfs}/etc/inittab"
+ printf " => Autologin on main console for %s enabled\n" "${user}"
+ [[ -z "${forced_password}" ]] && unset password
+ store_user_message "${user} has autologin on main console"
+ else
+ printf " => Autologin on main console for root enabled\n"
+ [[ -z "${forced_password}" ]] && unset password
+ store_user_message "${user} has autologin on main console"
+ fi
+ printf " => done\n"
+}
+
+container_tz()
+{
+ printf "#### container_tz(): setting container timezone ...\n"
+
+ #let's try to copy it from host
+ if [ -L "/etc/localtime" ]; then
+ #host has a symlink
+ #let see if we can reproduct symlink
+ target=$(readlink /etc/localtime)
+ if [[ "$target" != "" ]]; then
+ if [ -f "${rootfs}/${target}" ]; then
+ #same target exists in container
+ chroot "${rootfs}" ln -sf "${target}" "/etc/localtime"
+ printf " => host symlink reproducted in container : %s\n"
"${target}"
+ store_user_message "timezone copyed from host"
+ return 0
+ fi
+ fi
+ fi
+
+ if [ -e /etc/localtime ]; then
+ # duplicate host timezone
+ cat /etc/localtime > "${rootfs}/etc/localtime"
+ printf " => host localtime copyed to container\n"
+ store_user_message "timezone was staticly copyed from host"
+ else
+ # otherwise set up UTC
+ chroot "${rootfs}" ln -sf /usr/share/zoneinfo/UTC /etc/localtime
+ printf " => fallback: fixed to UTC\n"
+ store_user_message "timezone was fixed to UTC"
+ fi
+}
+
+
+container_portage()
+{
+ printf "#### container_portage(): setting container portage... \n"
+
+ #default entry for conf
+ portage_mount="#container set with private portage tree, no mount
here"
+
+ printf "Warnings are normal here, don't worry\n"
+ #container repos detection
+ if chroot ${rootfs} portageq get_repo_path / gentoo > /dev/null ; then
+ portage_container="$(chroot ${rootfs} portageq get_repo_path /
gentoo)"
+ else
+ die 1 "Failed to figure out container portage tree location with
portageq get_repo_path / gentoo\n"
+ fi
+
+ if [[ -n "${private_portage}" ]]; then
+ container_private_portage
+ return 0
+ fi
+
+ if [ -z "${portage_dir}" ]; then
+ #gentoo host detection
+ printf "trying to guess portage_dir from host...\n"
+ portage_dir="$(portageq get_repo_path / gentoo 2>/dev/null)"
+ if [ ! -d "${portage_dir}/profiles" ]; then
+ printf " => host portage detection failed (not gentoo host),
fallback to private portage tree\n"
+ container_private_portage
+ return 0
+ fi
+ else
+ if [ ! -d "${portage_dir}/profiles" ]; then
+ die 1 "specified portage_dir (%s) does not contains profiles, is it
a portage tree ?\n" "${portage_dir}"
+ fi
+ fi
+
+ # if we are here, we have shared portage_dir
+ #ensure dir exists
+ chroot "${rootfs}" mkdir ${portage_container}
+ portage_mount="#container set with shared portage
+ lxc.mount.entry=${portage_dir} ${portage_container/\//} none ro,bind 0
0"
+ store_user_message "container has a shared portage from host's
${portage_dir} to ${portage_container/\//}"
+ #Let's propose binary packages
+ cat <<- EOF >> "${rootfs}/etc/portage/make.conf"
+ # enable this to store built binary packages
+ #FEATURES="\$FEATURES buildpkg"
+
+ # enable this to use built binary packages
+ #EMERGE_DEFAULT_OPTS="\${EMERGE_DEFAULT_OPTS} --usepkg"
+
+ # enable and *tune* this kind of entry to slot binaries, specialy if
you use multiples archs and variants
+ #PKGDIR="\${PKGDIR}/amd64
+ #or PKGDIR="\${PKGDIR}/hardened"
+EOF
+ printf " => portage stuff done, see /etc/portage/make.conf for
additionnal tricks\n"
+
+}
+
+container_private_portage()
+{
+ #called from container_portage() do not call directly from
container_setup
+ printf "# untaring private portage to %s from %s ... \n"
"${rootfs}/${portage_container}" "${portage_cache}"
+ mkdir -p "${rootfs}/${portage_container}"
+ execute_exclusively portage 60 tar -xp --strip-components 1 -C
"${rootfs}/${portage_container}" -f "${portage_cache}" \
+ || die 2 "Error: unable to extract the portage tree.\n"
+ store_user_message "container has its own portage tree at
${portage_container}"
+ printf "=> done\n"
+}
+
+#helper func for container_genconf_net()
+nic_write()
+{
+ #display with gentoo's confd.net format
+ echo "config_${nic_name}=\"${nic_conf}\""
+ #add to managed list
+ [[ "${nic_conf}" == "dhcp" ]] && nic_managed="${nic_managed}
${nic_name}"
+ [[ "${nic_conf}" == "null" ]] && nic_unmanaged="${nic_unmanaged}
${nic_name}"
+ nic_writed=1
+}
+
+#Analyse lxc.conf and print conf.d/net content
+container_conf_net()
+{
+ local file=${1}
+ [[ -z "${nic_last}" ]] && nic_last=-1
+ [[ -z "${nic_named}" ]] && nic_named=0
+ OLDIFS=$IFS
+ IFS="
+"
+ #I'll drink champagne the day we do templates in python
+ #let's do some drity bash things
+ for line in $( sed -r "s/[ ]*=[ ]*/_real_ugly_sep_42_/" "${file}" );
do
+ key=$(echo "${line}" | sed 's/_real_ugly_sep_42_.*$//')
+ value=$(echo "${line}" | sed 's/^.*_real_ugly_sep_42_//')
+
+ #new nic !
+ if [[ "${key}" == "lxc.network.type" ]]; then
+ #we don't know what to do with it.
+ [[ "${value}" == "empty" ]] && continue
+
+ #write conf from previous loops
+ [[ "${nic_writed}" == "0" ]] && nic_write
+
+ #init defaults
+ let nic_last=nic_last+1
+
+ nic_writed=0
+ #if 1 named between 2 not named: last is eth1
+ #=> Number is ID munis number of named NIC before
+ nic_name="eth$(( ${nic_last} - ${nic_named} ))"
+ nic_conf="dhcp"
+ fi
+ if [[ "${key}" =~ ^lxc.network.ipv(4|6) ]]; then
+ #tell openrc to not manage this NIC as LXC set there address
+ nic_conf="null"
+ fi
+ if [[ "${key}" =~ ^lxc.network.name ]]; then
+ nic_name="${value}"
+ let nic_named=nic_named+1
+ fi
+ if [[ "${key}" == "lxc.include" ]]; then
+ #recursive into include
+ container_conf_net "${value}"
+ fi
+ done
+ #write conf from previous loops
+ [[ "${nic_writed}" == "0" ]] && nic_write
+ IFS=$OLDIFS
+}
+
+container_net()
+{
+ printf "container_net(): setting container network conf... \n"
+
+ #let suppose all containers shoud have net if we found a bridge
+ if ! grep -q "^lxc.network.type" $path/config 2>/dev/null; then
+ ## guess first bridge name
+ bridge=$(brctl show | awk 'NR==2 {print $1}')
+ if [[ "${bridge}" != "" ]]; then
+ cat <<EOF >> $path/config
+#Autodetected nic by lxc-gentoo
+lxc.network.type = veth
+lxc.network.link = ${bridge}
+lxc.network.flags = up
+EOF
+ store_user_message "network was autodetected, we use veth over
bridge: ${bridge}, it will need a dhcp server to work"
+ fi
+ fi
+
+ #Analyse network configuration in config
+ container_conf_net "$path/config" >> "${rootfs}/etc/conf.d/net"
+
+ #For each openrc managed nic, activate
+ for nic in ${nic_managed}
+ do
+ chroot "${rootfs}" ln -s net.lo "/etc/init.d/net.${nic}"
+ chroot "${rootfs}" rc-update add net.${nic} default
+ done
+
+ # unless openrc manage a nic, we now have to force openrc to automatic
+ # provision of the 'net' dep. If we do not, network dependent services
+ # will fail to load
+ if [[ -z "${nic_managed}" ]]; then
+ #tell openrc that lxc already did the work
+ echo 'rc_provide="net"' >> "$CACHE/etc/rc.conf"
+ fi
+
+ # found how much nic finaly have
+ nic_count=$(( ${nic_last} + 1 ))
+ if [[ ${nic_count} == 0 ]]; then
+ #If no Nic, no need to continue
+ store_user_message "No network interface for this container"
+ return 0
+ fi
+
+ # Here is some tweak about static hwaddr
+ # if there is exactly one veth or macvlan network entry, make sure
+ # it has an associated mac address.
+ # Read explanations :
http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006736.html
+ # Bash limits the ability to do this on more than 1 nic
+ if [ "${nic_count}" -eq 1 ] && ! grep -q "^lxc.network.hwaddr"
$path/config; then
+ hwaddr="fe:$(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/.$//')"
+ echo "#Fixed hwaddr" >> $path/config
+ echo
"#http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006736.html"
>> $path/config
+ echo "lxc.network.hwaddr = $hwaddr" >> $path/config
+ store_user_message "a static hardware addr was fixed for your NIC"
+ fi
+
+ #Wiser hwaddr management
+ # If you put a lxc.network.hwaddr containing "x", like
fe:a2:xx:xx:xx:xx
+ # each x will be replaced with random hex number
+ # similar feature is proposed for lxc-create
+ #
http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006771.html
+ # In the meantime, here is bash version
+
+ #generate enough random hex for all nics
+ randomhex=$(od -An -N $(( ${nic_count} * 6 )) -t x2 /dev/urandom | sed
':a;N;$!ba;s/\n/ /g;s/\n/ /g' | sed 's/[^0-f]//g')
+
+ #replace "x" in hwaddr with
+ awk -F '[ \t]*=[ \t]*' '
+ BEGIN { split("'${randomhex}'", randomhex, ""); r=1 }
+ $1 != "lxc.network.hwaddr" { print $0 }
+ $1 == "lxc.network.hwaddr" { printf("%s = ",$1)
+ split($2, chars, "");
+ for (i=1; i <= length(chars); i++) {
+ if ( chars[i] == "x" ) {
+ printf("%s", randomhex[r]);
+ r=r+1;
+ }
+ else printf("%s", chars[i]);
+ }
+ printf("\n");
+ }' $path/config >> $path/config.hwaddr.awk
+
+ diff $path/config.hwaddr.awk $path/config >/dev/null 2>&1 ||
store_user_message "templated hwaddr generated"
+ [[ $? == 0 ]] && mv $path/config.hwaddr.awk $path/config
+
+ printf " => network conf done.\n"
+}
+
+# custom hostname
+container_hostname()
+{
+ printf "#### container_hostname(): setting hostname... \n"
+ printf "hostnale=%s\n" "${name}" > "${rootfs}/etc/conf.d/hostname"
+ printf " => done.\n"
+}
+
+container_auth()
+{
+ printf "#### container_auth(): setting authentification... \n"
+ if [[ "${user}" != "root" ]]; then
+ printf " non root user requested, creating... \n"
+ chroot "${rootfs}" useradd --create-home -s /bin/bash "${user}" ||
die 1 "failed to create user ${user}"
+ printf " => user %s created\n" "${user}"
+ fi
+ store_user_message "Connection user is ${user}"
+ #Home of user
+ auth_home=$(chroot "${rootfs}" getent passwd "${user}" | cut -d : -f
6)
+ if [[ -r "${auth_key}" ]]; then
+ printf " deploying auth_key %s for user %s ...\n" "${auth_key}"
"${user}"
+ mkdir -p "${rootfs}/${auth_home}/.ssh"
+ cat >> "${rootfs}/${auth_home}/.ssh/authorized_keys"
+ chroot "${rootfs}" chown "${user}:"
"${auth_home}/.ssh/authorized_keys"
+ printf " => inserted public key in %s/.ssh/authorized_keys\n"
"${auth_home}"
+ [[ -z "${forced_password}" ]] && unset password
+ store_user_message "${user} has the ssh key you gived us"
+ fi
+
+ if [[ -n "${password}" ]]; then
+ printf " setting password for %s ...\n" "${user}"
+ echo "${user}:${password}" | chroot "${rootfs}" chpasswd || die 1
"failed to change password"
+ printf " => done. if you didn't specify , default is 'toor'\n"
+ if [[ -n "${forced_password}" ]]; then
+ store_user_message "${user} has the password you give for him"
+ else
+ store_user_message "${user} has the default password 'toor', please
change it ASAP"
+ fi
+ fi
+
+ printf " => done.\n"
+}
+
+################################################################################
+# lxc configuration files
+################################################################################
+
+container_conf()
+{
+ printf "container_configuration(): making lxc configuration file...
\n"
+
+ #at this point if there
+ conf_file="${path}/config"
+
+ if grep -q "^lxc.rootfs" "${conf_file}" ; then
+ #lxc-create already provided one
+ conf_rootfs_line=""
+ else
+ conf_rootfs_line="lxc.rootfs = $(readlink -f "${rootfs}")"
+ fi
+ if [[ "${arch}" == "x86" || "${arch}" == "amd64" ]]; then
+ local conf_arch_line="lxc.arch = ${arch}"
+ else
+ local conf_arch_line="# lxc.arch = ${arch}"
+ fi
+
+ conf_lxc_cap_drop="sys_module mac_admin mac_override mknod sys_time"
+ conf_sysfs="lxc.mount.entry=sys sys sysfs defaults 0 0"
+
+ #more aggressive configuration, for your safety. But less things may
work
+ if [ -n "${more_secure}" ]; then
+ conf_lxc_cap_drop="${conf_lxc_cap_drop} audit_control audit_write
dac_read_search fsetid ipc_owner linux_immutable setfcap sys_admin
sys_boot sys_pacct sys_ptrace sys_rawio sys_resource sys_tty_config
syslog"
+ conf_sysfs="# disabled for security, see
http://blog.bofh.it/debian/id_413
+#lxc.mount.entry=sys sys sysfs defaults 0 0"
+ fi
+
+ cat <<- EOF >> "${conf_file}"
+# sets container architecture
+# If desired architecture != amd64 or x86, then we leave it unset as
+# LXC does not oficially support anything other than x86 or amd64.
+${conf_arch_line}
+
+# console access
+lxc.tty = ${tty}
+lxc.pts = 1024
+
+# set the hostname
+lxc.utsname = ${name}
+
+${conf_rootfs_line}
+${portage_mount}
+${conf_sysfs}
+
+# this part is based on 'linux capabilities', see: man 7 capabilities
+# eg: you may also wish to drop 'cap_net_raw' (though it breaks ping)
+#
+# WARNING: the security vulnerability reported for 'cap_net_admin' at
+#
http://mainisusuallyafunction.blogspot.com/2012/11/attacking-hardened-linux-systems-with.html
+# via JIT spraying (the BPF JIT module disabled on most systems was
used
+# in the example, but others are suggested vulnerable) meant that users
+# with root in a container, that capability and kernel module may
escape
+# the container. ALWAYS be extremely careful granting any process root
+# within a container, use a minimal configuration at all levels -
+# including the kernel - and multiple layers of security on any system
+# where security is a priority. note that not only LXC but PAX (and
+# others?) were vulnerable to this issue.
+#
+# conservative: lxc.cap.drop = sys_module mknod mac_override sys_boot
+# aggressive follows. (leaves open: chown dac_override fowner ipc_lock
kill lease net_admin net_bind_service net_broadcast net_raw setgid
setuid sys_chroot)
+# lxc.cap.drop = audit_control audit_write dac_read_search fsetid
ipc_owner linux_immutable mac_admin mac_override mknod setfcap sys_admin
sys_boot sys_module sys_pacct sys_ptrace sys_rawio sys_resource sys_time
sys_tty_config syslog
+
+lxc.cap.drop = ${conf_lxc_cap_drop}
+
+${conf_mounts}
+
+# deny access to all devices by default, explicitly grant some
permissions
+#
+# format is [c|b] [major|*]:[minor|*] [r][w][m]
+# ^ ^ ^
+# char/block -' \`- device number \`-- read, write, mknod
+#
+# first deny all...
+lxc.cgroup.devices.deny = a
+# /dev/null and zero
+lxc.cgroup.devices.allow = c 1:3 rw
+lxc.cgroup.devices.allow = c 1:5 rw
+# /dev/{,u}random
+lxc.cgroup.devices.allow = c 1:9 rw
+lxc.cgroup.devices.allow = c 1:8 r
+# /dev/pts/*
+lxc.cgroup.devices.allow = c 136:* rw
+lxc.cgroup.devices.allow = c 5:2 rw
+# /dev/tty{0,1}
+lxc.cgroup.devices.allow = c 4:1 rwm
+lxc.cgroup.devices.allow = c 4:0 rwm
+# /dev/tty
+lxc.cgroup.devices.allow = c 5:0 rwm
+# /dev/console
+lxc.cgroup.devices.allow = c 5:1 rwm
+EOF
+ if [ -n "${nettun}" ]; then
+ cat <<- EOF >> "${conf_file}"
+# /dev/net/tun
+lxc.cgroup.devices.allow = c 10:200 rwm
+EOF
+ fi
+ printf " => done.\n"
+}
+
+usage()
+{
+ cat <<EOF
+$1 -h|--help [-a|--arch <arch>] [-v|--variant <variant>]
[-P|--private-portage] [--portage-dir <protagedir>] [-t|--tarball
<stage3file>]
+ [-F|--flush-cache] [-c|--cache-only] [-u|--user <username>]
[-w|--password <password>] [-S|--auth-key <keyfile>]
+ [-s|--more-secure] [-m|--mirror <gentoomirror>] [--tty <number>]
[--nettun]
+
+arch: the container architecture (e.g. amd64): defaults to host arch
(currently: '${arch}')
+ If you choose one that needs emulation
+ tested: amd64, x86
+ You could try any other gentoo arch, why not...
+
+variant: gentoo's Architecture variant as of dec 2013 : (currently:
'${variant}')
+ for amd64 arch: amd64 (default), amd64-hardened+nomultilib,
amd64-hardened, amd64-nomultilib, x32
+ for x86 arch: i686 (default), i486, i686-hardened
+ for arm arch: armv7a (default), armv7a_hardfp, armv6j, armv6j_hardfp,
armv5tel, armv4tl
+
+private-portage: by default, /usr/portage is mount-binded with host one
if exists (currently: '${private_portage}')
+ this force container to have his own copy
+
+portage-dir: portage dir used for shared portage
+ by default the host on if any (currently: '${portage_dir}')
+
+tarball: force usage of local stage3 archive (currently: '${arch}')
+ If empty, latest will be downloaded
+
+flush-cache: do like there is no previous cache
+
+cache-only: just ensure cache is present
+ if cache exists and "flush-cache" not specified, does nothing
+
+user: user used in auth oriented options (currently: '${user}')
+
+password: password for user (currently: '${password}')
+ if default, usage of auth-key will disable password setting
+
+autologin: enable autologin for user (currently: '${autologin}')
+ This unset default password setting
+
+auth-key: SSH Public key file to inject into container for user
(currently: '${auth_key}')
+ This unset default password setting
+
+more-secure: does some additional security agressive settings (may
prevent things to run) (currently: '${more_secure}')
+
+mirror: gentoo mirror for download (currently: '${mirror}')
+
+tty: number of tty (6 max) (currently: '${tty}')
+
+nettun: enable creation of /dev/net/tun (for private container VPN)
(currently: '${nettun}')
+EOF
+ exit 0
+}
+
+#some overridable defaults
+set_default_arch
+
+mirror="http://distfiles.gentoo.org"
+user="root"
+password="toor"
+tty=0
+options=$(getopt -o hp:n:a:FcPv:t:S:u:w:sm: -l
help,rootfs:,path:,name:,arch:,flush-cache,cache-only,private-portage,variant:,portage-dir:,tarball:,auth_key:,user:,autologin,password:,more-secure,mirror:,tty:,nettun
-- "$@")
+
+eval set -- "$options"
+
+while true
+do
+ case "$1" in
+ -h|--help) usage $0 && exit 0;;
+ --rootfs) rootfs=$2; shift 2;;
+ -p|--path) path=$2; shift 2;;
+ -n|--name) name=$2; shift 2;;
+ -a|--arch) arch=$2; shift 2;;
+ -F|--flush-cache) flush_cache=1; shift 1;;
+ -c|--cache-only) cache_only=1; shitf 1;;
+ -P|--private-portage) private_portage=1; shift 1;;
+ -v|--variant) variant=$2; shift 2;;
+ --portage-dir) portage_dir=$2; shift 2;;
+ -t|--tarball) tarball=$2; shift 2;;
+ -S|--auth-key) auth_key=$2; shift 2;;
+ -u|--user) user=$2; shift 2;;
+ -w|--password) forced_password=1; password=$2; shift 2;;
+ -s|--more-secure) more_secure=1; shift 1;;
+ -m|--mirror) mirror=$2; shift 2;;
+ --nettun) nettun=1; shift 1;;
+ --tty) [[ $2 -lt 6 ]] && tty=$2; shift 2;;
+ --autologin) autologin=1; shift 1;;
+ --) shift 1; break ;;
+ *) break ;;
+ esac
+done
+
+cacheroot="@LOCALSTATEDIR@/cache/lxc/gentoo"
+portage_cache="${cacheroot}/portage.tbz"
+cachefs="${cacheroot}/rootfs-${arch}-${variant}"
+
+alias wget="wget --timeout=8 --read-timeout=15 -c -t10 -nd"
+
+do_all() {
+ cache_setup
+ if [ -z "${cache_only}" ]; then
+ container_setup
+ fi
+}
+
+execute_exclusively "cache-${arch}-${variant}" 60 do_all
--
1.8.3.2
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