Le 14/01/2014 22:42, Stéphane Graber a écrit : > On Tue, Jan 14, 2014 at 12:06:26AM +0100, l...@zitta.fr wrote: >> Gentoo template >> >> Signed-off-by: gza <l...@zitta.fr> > Hi, > > I must admit having only very briefly gone through the code as I'm not > familiar with Gentoo and it's a rather massive template to do a full > review of. > > I just noticed you're missing a .gitignore entry which I'll add and it's > also unfortunate that a new template isn't using the new common config > includes instead of hardcoding the whole config into every single > container, but that's something you'll obviously fix in the near future. > > > In the meant time: > Acked-by: Stéphane Graber <stgra...@ubuntu.com> Hi, I'll try to apply best practices during next days.
BTW, What about common "bash functions" for templates ? Perhaps for Lxc 1.1 ... >> --- >> configure.ac | 1 + >> templates/Makefile.am | 1 + >> templates/lxc-gentoo.in | 828 >> ++++++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 830 insertions(+) >> create mode 100644 templates/lxc-gentoo.in >> >> diff --git a/configure.ac b/configure.ac >> index 8514267..d69afe7 100644 >> --- a/configure.ac >> +++ b/configure.ac >> @@ -648,6 +648,7 @@ 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 ff0a603..ac870a1 100644 >> --- a/templates/Makefile.am >> +++ b/templates/Makefile.am >> @@ -10,6 +10,7 @@ templates_SCRIPTS = \ >> lxc-debian \ >> lxc-download \ >> lxc-fedora \ >> + lxc-gentoo \ >> lxc-openmandriva \ >> lxc-opensuse \ >> lxc-oracle \ >> diff --git a/templates/lxc-gentoo.in b/templates/lxc-gentoo.in >> new file mode 100644 >> index 0000000..2bc13fd >> --- /dev/null >> +++ b/templates/lxc-gentoo.in >> @@ -0,0 +1,828 @@ >> +#!/bin/bash >> + >> +# >> +# LXC template for gentoo >> +# >> +# Author: Guillaume Zitta <l...@zitta.fr> >> +# >> +# 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 >> +# >> + >> +# 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} >> ${nic_name}" >> + [[ -z "${nic_hwaddr}" && ${nic_type} == "veth" ]] && >> nic_wo_hwaddr="${nic_wo_hwaddr} ${nic_name}" >> + nic_writed=1 >> +} >> + >> +#Analyse lxc.conf and print conf.d/net content >> +container_conf_net() >> +{ >> + local file=${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} - ${nic_named} ))" >> + nic_conf="dhcp" >> + nic_type="${value}" >> + fi >> + >> + if [[ "${key}" == "lxc.network.hwaddr" ]]; then >> + nic_hwaddr=1 >> + fi >> + >> + if [[ "${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" >> + >> + #Analyse network configuration in config >> + container_conf_net "$path/config" >> "${rootfs}/etc/conf.d/net" >> + >> + # found how much nic finaly have >> + nic_count=$(( ${nic_last} + 1 )) >> + >> + # unless openrc manage a nic, we now have to force openrc to >> automatic >> + # provision of the 'net' dep. If we do not, network dependent services >> + # will fail to load >> + if [[ -z "${nic_managed}" ]]; then >> + #tell openrc that lxc already did the work >> + echo 'rc_provide="net"' >> "$CACHE/etc/rc.conf" >> + fi >> + >> + #No NIC ? >> + if [[ ${nic_count} == 0 ]]; then >> + #If no Nic, no need to continue >> + bridge=$(brctl show | awk 'NR==2 {print $1}') >> + if [[ "${bridge}" != "" ]]; then >> + store_user_message "No network interface for this >> container >> +It's a pitty, you have bridge, ${bridge}. >> +If it is for Lxc, use it next time by adding this to your default.conf : >> +lxc.network.type = veth >> +lxc.network.link = ${bridge} >> +lxc.network.flags = up >> +lxc.network.hwaddr = fe:xx:xx:xx:xx:xx" >> + return 0 >> + else >> + store_user_message "No network interface for this container" >> + return 0 >> + fi >> + fi >> + >> + #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.${nic} default >> + done >> + >> + #Warn about dynamic hwaddr >> + if [[ -n "${nic_wo_hwaddr}" ]]; then >> + store_user_message "Warning, these veth NIC don't have >> fixed hwaddr : >> +${nic_wo_hwaddr} >> + >> +see >> http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006736.html >> +and man lxc.conf" >> + fi >> + >> + printf " => network conf done.\n" >> +} >> + >> +# custom hostname >> +container_hostname() >> +{ >> + printf "#### container_hostname(): setting hostname... \n" >> + printf "hostnale=%s\n" "${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 >> >> >> _______________________________________________ >> lxc-devel mailing list >> lxc-devel@lists.linuxcontainers.org >> http://lists.linuxcontainers.org/listinfo/lxc-devel > > > _______________________________________________ > lxc-devel mailing list > lxc-devel@lists.linuxcontainers.org > http://lists.linuxcontainers.org/listinfo/lxc-devel _______________________________________________ lxc-devel mailing list lxc-devel@lists.linuxcontainers.org http://lists.linuxcontainers.org/listinfo/lxc-devel
