templates/lxc-gentoo.in

   1 #!/bin/bash
   2
   3 #
   4 # LXC template for gentoo
   5 #
   6 # Author: Guillaume Zitta <lxc@zitta.fr>
   7 #
   8 # Widely inspired from lxc-gentoo script at https://github.com/globalcitizen/lxc-gentoo
   9 #
  10 # this version is reworked with :
  11 # - out of the lxc-create compat
  12 # - vanilla gentoo config
  13 # - ready to use cache
  14 #
  15
  16 # Detect use under userns (unsupported)
  17 for arg in "$@"; do
  18     [ "$arg" = "--" ] && break
  19     if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
  20         echo "This template can't be used for unprivileged containers." 1>&2
  21         echo "You may want to try the \"download\" template instead." 1>&2
  22         exit 1
  23     fi
  24 done
  25
  26 # Make sure the usual locations are in PATH
  27 export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
  28
  29 # Ensure strict root's umask doesen't render the VM unusable
  30 umask 022
  31
  32 LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
  33
  34 ################################################################################
  35 #                        Various helper functions
  36 ################################################################################
  37
  38 # param: $1: the name of the lock
  39 # param: $2: the timeout for the lock
  40 # The rest contain the command to execute and its parameters
  41 execute_exclusively()
  42 {
  43     mkdir -p @LOCALSTATEDIR@/lock/subsys/
  44
  45     local lock_name="$1"
  46     local timeout="$2"
  47     shift 2
  48
  49     {
  50         printf "Attempting to obtain an exclusive lock (timeout: %s sec) named \"%s\"...\n" "${timeout}" "$lock_name"
  51
  52         flock -x -w "${timeout}" 50
  53
  54         if [[ $? -ne 0 ]]; then
  55             printf " => unable to obtain lock, aborting.\n"
  56             return 2
  57         else
  58             printf " => done.\n"
  59         fi
  60
  61         printf " => Executing \"%s\"\n" "$*"
  62         "$@"
  63         retval=$?
  64     } 50> "@LOCALSTATEDIR@/lock/subsys/lxc-gentoo-${lock_name}"
  65     return $retval
  66 }
  67
  68 # a die function is always a good idea
  69 die()
  70 {
  71     printf "\n[the last exit code leading to this death was: %s ]\n" "$?"
  72     local retval="$1"
  73     shift 1
  74     printf "$@"
  75     exit "$retval"
  76 }
  77
  78 # gentoo arch/variant detection
  79 set_default_arch()
  80 {
  81     printf "### set_default_arch: default arch/variant autodetect...\n"
  82     arch=$(arch)
  83     if [[ $arch =~ i.86 ]]; then
  84         arch="x86"
  85         variant="x86"
  86     elif [[ $arch == "x86_64" ]]; then
  87         arch="amd64"
  88         variant="amd64"
  89     elif [[ $arch =~ arm.* ]]; then
  90         arch="arm"
  91         variant="armv7a"
  92     else
  93         #who knows, it may work...
  94         printf " => warn: unexpected arch:${arch} let me knows if it works :)\n"
  95         variant="${arch}"
  96     fi
  97     printf " => Got: arch=%s variant=%s\n" "${arch}" "${variant}"
  98 }
  99
 100 store_user_message()
 101 {
 102     user_message="${user_message}=> $@\n"
 103 }
 104
 105 ################################################################################
 106 #                    CACHE Preparation
 107 ################################################################################
 108 # during setup cachedir is $cacheroot/partial-$arch-$variant
 109 # at the end, it will be   $cacheroot/rootfs-$arch-$variant
 110
 111 cache_setup(){
 112     partialfs="${cacheroot}/partial-${arch}-${variant}"
 113
 114     #if cache exists and flush not needed, return
 115     [[ -d "${cachefs}" && -z "${flush_cache}" ]] && return 0
 116
 117     printf "###### cache_setup(): doing cache preparation\n"
 118     local retval=1
 119
 120     #clean from failed previous run
 121     rm -rf "${partialfs}"
 122     mkdir -p "${partialfs}"
 123
 124     #let's go
 125     cache_precheck && \
 126     cache_stage3 && \
 127     cache_portage && \
 128     cache_inittab && \
 129     cache_net && \
 130     cache_dev && \
 131     cache_openrc && \
 132     cache_locale && \
 133     rm -rf "${cachefs}" && \
 134     mv "${partialfs}" "${cachefs}" && \
 135     printf "###### cache_setup: Cache should be ready\n"
 136
 137     return $?
 138 }
 139
 140 cache_precheck()
 141 {
 142     printf "### cache_precheck(): doing some pre-start checks ...\n"
 143     # never hurts to have a fail-safe.
 144     [[ -n "${cacheroot//\/}" ]] \
 145         || die 8 "\$cacheroot (%s) IS EMPTY OR MADE OF ONLY DIRECTORY SEPERATORS, THIS IS *VERY* BAD!\n" "${cacheroot}"
 146 }
 147
 148 #get latest stage3 tarball
 149 cache_stage3()
 150 {
 151     printf "### cache_stage3(): stage3 cache deployment...\n"
 152
 153     if [ -z "${tarball}" ]; then
 154         #variables init
 155         local stage3_baseurl="${mirror}/releases/${arch}/autobuilds"
 156
 157         # get latest-stage3....txt file for subpath
 158         local stage3_pointer="${stage3_baseurl}/latest-stage3-${variant}.txt"
 159
 160         printf "Determining path to latest Gentoo %s (%s) stage3 archive...\n" "${arch}" "${variant}"
 161         printf " => downloading and processing %s\n" "${stage3_pointer}"
 162
 163         local stage3_latest_tarball=$(wget -q -O - "${stage3_pointer}" | tail -n1 ) \
 164             || die 6 "Error: unable to fetch\n"
 165
 166         printf " => Got: %s\n" "${stage3_latest_tarball}"
 167
 168         printf "Downloading/untarring the actual stage3 tarball...\n"
 169         wget -O - "${stage3_baseurl}/${stage3_latest_tarball}" | tar -xjpf - -C "${partialfs}" \
 170             || die 6 "Error: unable to fetch or untar\n"
 171         printf " => extracted to: %s\n" "${partialfs}"
 172     else
 173         printf "Extracting the stage3 tarball...\n"
 174         tar -xpf "${tarball}" -C "${partialfs}" || die 6 "unable to untar ${tarball} to ${partialfs}"
 175     fi
 176
 177     #check if it chroots
 178     printf "chroot test..."
 179     chroot ${partialfs} /bin/true || die 1 "Error: chroot %s /bin/true, failed" "${partialfs}"
 180     printf " OK\n"
 181     printf " => stage3 cache extracted in : %s\n" "${partialfs}"
 182     return 0
 183 }
 184
 185 cache_portage()
 186 {
 187     printf "### cache_portage: caching portage tree tarball...\n"
 188     [[ -z "${flush_cache}" && -f "${portage_cache}" ]] && return 0
 189
 190     rm -f ${portage_cache}
 191
 192     printf "Downloading Gentoo portage (software build database) snapshot...\n"
 193     execute_exclusively portage 60 wget -O "${portage_cache}" "${mirror}/snapshots/portage-latest.tar.bz2" \
 194     || die 6 "Error: unable to fetch\n"
 195     printf " => done.\n"
 196 }
 197
 198 # custom inittab
 199 cache_inittab()
 200 {
 201     printf "### cache_inittab: tuning inittab...\n"
 202
 203     INITTAB="${partialfs}/etc/inittab"
 204
 205     [[ -w "$INITTAB" ]] || die 1 "Error: $INITTAB is not writeable"
 206
 207     # create console
 208     echo "# Lxc main console" >> "$INITTAB"
 209     echo "1:12345:respawn:/sbin/agetty -a root --noclear 115200 console linux" >> "$INITTAB"
 210
 211     # finally we add a pf line to enable clean shutdown on SIGPWR (issue 60)
 212     echo "# clean container shutdown on SIGPWR" >> "$INITTAB"
 213     echo "pf:12345:powerwait:/sbin/halt" >> "$INITTAB"
 214
 215     # we also blank out /etc/issue here in order to prevent delays spawning login
 216     # caused by attempts to determine domainname on disconnected containers
 217     sed -i 's/[\][Oo]//g' "${partialfs}/etc/issue"
 218 }
 219
 220 cache_net()
 221 {
 222     printf "### cache_net: doing some useful net tuning...\n"
 223     # useful for chroot
 224     # /etc/resolv.conf
 225     grep -i 'search ' /etc/resolv.conf > "${partialfs}/etc/resolv.conf"
 226     grep -i 'nameserver ' /etc/resolv.conf >> "${partialfs}/etc/resolv.conf"
 227
 228     # fix boot-time interface config wipe under aggressive cap drop
 229     # (openrc 0.9.8.4 ~sep 2012 - https://bugs.gentoo.org/show_bug.cgi?id=436266)
 230     # initial warkaround was: sed -i -e 's/^#rc_nostop=""/rc_nostop="net.eth0 net.lo"/' "${partialfs}/etc/rc.conf"
 231     # but this one does not depends on interfaces names
 232     echo 'rc_keyword="-stop"' >> "${partialfs}/etc/conf.d/net"
 233 }
 234
 235 cache_dev()
 236 {
 237     printf "### cache_dev(): /dev tuning...\n"
 238
 239     #Wait for https://bugs.gentoo.org/show_bug.cgi?id=496054
 240     mkdir "${partialfs}/dev/pts"
 241     mkdir "${partialfs}/dev/shm"
 242     mkdir "${partialfs}/dev/mqueue"
 243
 244     mkdir -m 755 "${partialfs}/dev/net"
 245     mknod -m 666 "${partialfs}/dev/net/tun"        c 10 200
 246
 247     return 0
 248 }
 249
 250 # fix openrc system
 251 cache_openrc()
 252 {
 253     printf "### cache_openrc(): doing openrc tuning\n"
 254
 255     #Wait for https://bugs.gentoo.org/show_bug.cgi?id=496054
 256     chroot "${partialfs}" sed s/-lxc//g -i "/etc/init.d/devfs"
 257
 258     return 0
 259 }
 260
 261 cache_locale()
 262 {
 263    printf "### cache_locale(): initiating minimale locale en_US.UTF-8 \n"
 264
 265    echo "en_US.UTF-8 UTF-8" >> "${partialfs}/etc/locale.gen"
 266    chroot "${partialfs}" locale-gen
 267
 268    return 0
 269 }
 270
 271 ################################################################################
 272 #                    CONTAINER Preparation
 273 ################################################################################
 274
 275 container_setup() {
 276     printf "##### container_setup(): starting container setup\n"
 277
 278     #in most cases lxc-create should have provided a copy of default lxc.conf
 279     #let's tag where template starts, or just create the files
 280     echo '### lxc-gentoo template stuff starts here' >> "$path/config"
 281
 282     #Determine rootfs
 283     #If backingstore was specified, lxc.rootfs should be present or --rootfs did the rootfs var creation
 284     if [ -z "${rootfs}" ]; then
 285         rootfs=`awk -F= '$1 ~ /^lxc.rootfs/ { print $2 }' "$path/config" 2>/dev/null`
 286         if [ -z "${rootfs}" ]; then
 287             #OK it's default
 288             rootfs="${path}/rootfs"
 289         fi
 290     fi
 291     store_user_message "rootfs of container is : ${rootfs}"
 292     store_user_message "config of container is : ${path}/config"
 293
 294     container_precheck && \
 295     container_rootfs && \
 296     container_consoles && \
 297     container_tz && \
 298     container_portage && \
 299     container_net && \
 300     container_hostname && \
 301     container_auth && \
 302     container_conf
 303     if [ $? -ne 0 ]; then
 304         die 1 "container_setup(): one step didn't complete, sorry\n"
 305     fi
 306
 307     printf "###### container_setup(): container should be ready to start!\n"
 308     printf "\n\n"
 309     printf "You could now use you container with: lxc-start -n %s\n" "${name}"
 310     printf "little things you should know about your container:\n"
 311     printf "${user_message}"
 312     return 0
 313 }
 314
 315 container_precheck()
 316 {
 317     printf "### container_precheck(): doing some pre-start checks ...\n"
 318     # never hurts to have a fail-safe.
 319     [[ -n "${name//\/}" ]] \
 320         || die 8 "\$name (%s) IS EMPTY OR MADE OF ONLY DIRECTORY SEPERATORS, THIS IS *VERY* BAD!\n" "${name}"
 321
 322     [[ -n "${rootfs//\/}" ]] \
 323         || die 8 "\$rootfs (%s) IS EMPTY OR MADE OF ONLY DIRECTORY SEPERATORS, THIS IS *VERY* BAD!\n" "${rootfs}"
 324
 325     [[ -n "${cachefs//\/}" ]] \
 326         || die 8 "\$cachefs (%s) IS EMPTY OR MADE OF ONLY DIRECTORY SEPERATORS, THIS IS *VERY* BAD!\n" "${cachefs}"
 327
 328     # check if the rootfs already exists
 329     [[ -d "${rootfs}/etc" ]] && die 18 "Error: \$rootfs (%s) already exists!" "${rootfs}"
 330
 331     # check cache
 332     [[ ! -d "${cachefs}/etc" ]] && die 1 "Error: \$cachefs (%s) not found!" "${cachefs}"
 333
 334     return 0
 335 }
 336
 337 container_rootfs()
 338 {
 339     printf "#### container_rootfs(): copying rootfs %s from cache %s ...\n" "${rootfs}" "${cachefs}"
 340     tar -c -f - -C "${cachefs}" . | tar -x -p -f - -C "${rootfs}" || die 1 "Error: cache copy to rootfs failed"
 341
 342     printf "chroot test..."
 343     chroot "${rootfs}" /bin/true || die 1 "Error: 'chroot %s /bin/true' failed"
 344     printf " OK\n"
 345
 346     printf " => done\n"
 347     return 0
 348 }
 349
 350 container_consoles() {
 351     printf "#### container_consoles(): setting container consoles ...\n"
 352
 353     # disable unwanted ttys
 354     if [[ ${tty} < 6 ]]; then
 355         local mindis=$(( ${tty} + 1 ))
 356         sed -i "s/^c[${mindis}-6]/#&/" "${rootfs}/etc/inittab"
 357     fi
 358     printf " => main console + ${tty} ttys\n"
 359
 360     if [[ -z "${autologin}" ]]; then
 361         sed 's/agetty -a root/agetty/' -i "${rootfs}/etc/inittab"
 362     elif [[ "${user}" != "root" ]]; then
 363         sed "s/agetty -a root/agetty -a ${user}/" -i "${rootfs}/etc/inittab"
 364         printf " => Autologin on main console for %s enabled\n" "${user}"
 365         [[ -z "${forced_password}" ]] && unset password
 366         store_user_message "${user} has autologin on main console"
 367     else
 368         printf " => Autologin on main console for root enabled\n"
 369         [[ -z "${forced_password}" ]] && unset password
 370         store_user_message "${user} has autologin on main console"
 371     fi
 372     printf " => done\n"
 373 }
 374
 375 container_tz()
 376 {
 377     printf "#### container_tz(): setting container timezone ...\n"
 378
 379     #let's try to copy it from host
 380     if [ -L "/etc/localtime" ]; then
 381         #host has a symlink
 382         #let see if we can reproduct symlink
 383         target=$(readlink /etc/localtime)
 384         if [[ "$target" != "" ]]; then
 385             if [ -f "${rootfs}/${target}" ]; then
 386                 #same target exists in container
 387                 chroot "${rootfs}" ln -sf "${target}" "/etc/localtime"
 388                 printf " => host symlink reproducted in container : %s\n" "${target}"
 389                 store_user_message "timezone copyed from host"
 390                 return 0
 391             fi
 392         fi
 393     fi
 394
 395     if [ -e /etc/localtime ]; then
 396         # duplicate host timezone
 397         cat /etc/localtime > "${rootfs}/etc/localtime"
 398         printf " => host localtime copyed to container\n"
 399         store_user_message "timezone was staticly copyed from host"
 400     else
 401         # otherwise set up UTC
 402         chroot "${rootfs}" ln -sf /usr/share/zoneinfo/UTC /etc/localtime
 403         printf " => fallback: fixed to UTC\n"
 404         store_user_message "timezone was fixed to UTC"
 405     fi
 406 }
 407
 408
 409 container_portage()
 410 {
 411     printf "#### container_portage(): setting container portage... \n"
 412
 413     #default entry for conf
 414     portage_mount="#container set with private portage tree, no mount here"
 415
 416     printf "Warnings are normal here, don't worry\n"
 417     #container repos detection
 418     if chroot ${rootfs} portageq get_repo_path / gentoo > /dev/null ; then
 419         portage_container="$(chroot ${rootfs} portageq get_repo_path / gentoo)"
 420     else
 421         die 1 "Failed to figure out container portage tree location with portageq get_repo_path / gentoo\n"
 422     fi
 423
 424     if [[ -n "${private_portage}" ]]; then
 425         container_private_portage
 426         return 0
 427     fi
 428
 429     if [ -z "${portage_dir}" ]; then
 430         #gentoo host detection
 431         printf "trying to guess portage_dir from host...\n"
 432         portage_dir="$(portageq get_repo_path / gentoo 2>/dev/null)"
 433         if [ ! -d "${portage_dir}/profiles" ]; then
 434             printf " => host portage detection failed (not gentoo host), fallback to private portage tree\n"
 435             container_private_portage
 436             return 0
 437         fi
 438     else
 439         if [ ! -d "${portage_dir}/profiles" ]; then
 440             die 1 "specified portage_dir (%s) does not contains profiles, is it a portage tree ?\n" "${portage_dir}"
 441         fi
 442     fi
 443
 444     # if we are here, we have shared portage_dir
 445     #ensure dir exists
 446     chroot "${rootfs}" mkdir ${portage_container}
 447         portage_mount="#container set with shared portage
 448 lxc.mount.entry=${portage_dir} ${portage_container/\//} none ro,bind 0 0
 449 lxc.mount.entry=${portage_dir}/distfiles ${portage_container/\//}/distfiles none rw,bind 0 0
 450 #If you use eix, you should uncomment this
 451 #lxc.mount.entry=/var/cache/eix var/cache/eix none ro,bind 0 0"
 452     store_user_message "container has a shared portage from host's ${portage_dir} to ${portage_container/\//}"
 453         #Let's propose binary packages
 454     cat <<- EOF >> "${rootfs}/etc/portage/make.conf"
 455 # enable this to store built binary packages
 456 #FEATURES="\$FEATURES buildpkg"
 457
 458 # enable this to use built binary packages
 459 #EMERGE_DEFAULT_OPTS="\${EMERGE_DEFAULT_OPTS} --usepkg"
 460
 461 # enable and *tune* this kind of entry to slot binaries, specialy if you use multiples archs and variants
 462 #PKGDIR="\${PKGDIR}/amd64
 463 #or PKGDIR="\${PKGDIR}/hardened"
 464 EOF
 465     printf " => portage stuff done, see /etc/portage/make.conf for additionnal tricks\n"
 466
 467 }
 468
 469 container_private_portage()
 470 {
 471     #called from container_portage() do not call directly from container_setup
 472     printf "# untaring private portage to %s from %s ... \n" "${rootfs}/${portage_container}" "${portage_cache}"
 473     mkdir -p "${rootfs}/${portage_container}"
 474     execute_exclusively portage 60 tar -xp --strip-components 1 -C "${rootfs}/${portage_container}" -f "${portage_cache}" \
 475         || die 2 "Error: unable to extract the portage tree.\n"
 476     store_user_message "container has its own portage tree at ${portage_container}"
 477     printf "=> done\n"
 478 }
 479
 480 #helper func for container_genconf_net()
 481 nic_write()
 482 {
 483     #display with gentoo's confd.net format
 484     echo "config_${nic_name}=\"${nic_conf}\""
 485     #add to managed list
 486     [[ "${nic_conf}" == "dhcp" ]] && nic_managed="${nic_managed} ${nic_name}"
 487     [[ "${nic_conf}" == "null" ]] && nic_unmanaged="${nic_unmanaged} ${nic_name}"
 488     [[ -z "${nic_hwaddr}" && ${nic_type} == "veth" ]] && nic_wo_hwaddr="${nic_wo_hwaddr} ${nic_name}"
 489     nic_writed=1
 490 }
 491
 492 #Analyse lxc.conf and print conf.d/net content
 493 container_conf_net()
 494 {
 495     local file=${1}
 496     [[ -z "${nic_last}" ]] && nic_last=-1
 497     [[ -z "${nic_named}" ]] && nic_named=0
 498     OLDIFS=$IFS
 499     IFS="
 500 "
 501     #let's do some drity bash things to parse lxc network conf
 502     for line in $( sed -r "s/[ ]*=[ ]*/_real_ugly_sep_42_/" "${file}" ); do
 503         key=$(echo "${line}" | sed 's/_real_ugly_sep_42_.*$//')
 504         value=$(echo "${line}" | sed 's/^.*_real_ugly_sep_42_//')
 505
 506         #new nic !
 507         if [[ "${key}" == "lxc.network.type" ]]; then
 508             #we don't know what to do with it.
 509             [[ "${value}" == "empty" ]] && continue
 510
 511             #write conf from previous loops
 512             [[ "${nic_writed}" == "0" ]] && nic_write
 513
 514             #init defaults
 515             let nic_last=nic_last+1
 516
 517             nic_writed=0
 518             #if 1 named between 2 not named: last is eth1
 519             #=> Number is ID munis number of named NIC before
 520             nic_name="eth$(( ${nic_last} - ${nic_named} ))"
 521             nic_conf="dhcp"
 522             nic_type="${value}"
 523         fi
 524
 525                 if [[ "${key}" == "lxc.network.hwaddr" ]]; then
 526                 nic_hwaddr=1
 527         fi
 528
 529         if [[ "${key}" =~ ^lxc.network.ipv(4|6) ]]; then
 530             #tell openrc to not manage this NIC as LXC set there address
 531             nic_conf="null"
 532         fi
 533         if [[ "${key}" =~ ^lxc.network.name ]]; then
 534             nic_name="${value}"
 535             let nic_named=nic_named+1
 536         fi
 537         if [[ "${key}" == "lxc.include" ]]; then
 538             #recursive into include
 539             container_conf_net "${value}"
 540         fi
 541     done
 542     #write conf from previous loops
 543     [[ "${nic_writed}" == "0" ]] && nic_write
 544     IFS=$OLDIFS
 545 }
 546
 547 container_net()
 548 {
 549     printf "container_net(): setting container network conf... \n"
 550
 551     #Analyse network configuration in config
 552     container_conf_net "$path/config" >> "${rootfs}/etc/conf.d/net"
 553
 554         # found how much nic finaly have
 555     nic_count=$(( ${nic_last} + 1 ))
 556
 557         # unless openrc manage a nic, we now have to force openrc to automatic
 558     # provision of the 'net' dep. If we do not, network dependent services
 559     # will fail to load
 560     if [[ -z "${nic_managed}" ]]; then
 561         #tell openrc that lxc already did the work
 562         echo 'rc_provide="net"' >> "${rootfs}/etc/rc.conf"
 563     fi
 564
 565     #No NIC ?
 566     if [[ ${nic_count} == 0 ]]; then
 567         #If no Nic, no need to continue
 568         bridge=$(brctl show | awk 'NR==2 {print $1}')
 569         if [[ "${bridge}" != "" ]]; then
 570                         store_user_message "No network interface for this container
 571 It's a pitty, you have bridge, ${bridge}.
 572 If it is for Lxc, use it next time by adding this to your default.conf :
 573 lxc.network.type = veth
 574 lxc.network.link = ${bridge}
 575 lxc.network.flags = up
 576 lxc.network.hwaddr = fe:xx:xx:xx:xx:xx"
 577                         return 0
 578         else
 579                 store_user_message "No network interface for this container"
 580                         return 0
 581         fi
 582     fi
 583
 584     #For each openrc managed nic, activate
 585     sys_nic_index=1
 586     for nic in ${nic_managed}
 587     do
 588         chroot "${rootfs}" ln -s net.lo "/etc/init.d/net.${nic}"
 589         chroot "${rootfs}" rc-update add net.${nic} default
 590         #fake sysfs for openrc, in case settings does not provide it
 591         mkdir -p "${rootfs}/sys/class/net/${nic}"
 592         echo ${sys_nic_index} > "${rootfs}/sys/class/net/${nic}/ifindex"
 593         echo up > "${rootfs}/sys/class/net/${nic}/operstate"
 594         let sys_nic_index=sys_nic_index+1
 595     done
 596
 597         #Warn about dynamic hwaddr
 598     if [[ -n "${nic_wo_hwaddr}" ]]; then
 599                 store_user_message "Warning, these veth NIC don't have fixed hwaddr :
 600 ${nic_wo_hwaddr}
 601
 602 see http://lists.linuxcontainers.org/pipermail/lxc-devel/2013-December/006736.html
 603 and man lxc.conf"
 604     fi
 605
 606     printf " => network conf done.\n"
 607 }
 608
 609 # custom hostname
 610 container_hostname()
 611 {
 612     printf "#### container_hostname(): setting hostname... \n"
 613     printf "hostnale=%s\n" "${name}" > "${rootfs}/etc/conf.d/hostname"
 614     printf " => done.\n"
 615 }
 616
 617 container_auth()
 618 {
 619     printf "#### container_auth(): setting authentification... \n"
 620     if [[ "${user}" != "root" ]]; then
 621         printf " non root user requested, creating... \n"
 622         chroot "${rootfs}" useradd --create-home -s /bin/bash "${user}" || die 1 "failed to create user ${user}"
 623         printf "  => user %s created\n" "${user}"
 624     fi
 625     store_user_message "Connection user is ${user}"
 626     #Home of user
 627     auth_home=$(chroot "${rootfs}" getent passwd "${user}" | cut -d : -f 6)
 628     if [[ -r "${auth_key}" ]]; then
 629         printf " deploying auth_key %s for user %s ...\n" "${auth_key}" "${user}"
 630         mkdir -p "${rootfs}/${auth_home}/.ssh"
 631         cat >> "${rootfs}/${auth_home}/.ssh/authorized_keys"
 632         chroot "${rootfs}" chown "${user}:" "${auth_home}/.ssh/authorized_keys"
 633         printf "  => inserted public key in %s/.ssh/authorized_keys\n" "${auth_home}"
 634         [[ -z "${forced_password}" ]] && unset password
 635         store_user_message "${user} has the ssh key you gived us"
 636     fi
 637
 638     if [[ -n "${password}" ]]; then
 639         printf " setting password for %s ...\n" "${user}"
 640         echo "${user}:${password}" | chroot "${rootfs}" chpasswd || die 1 "failed to change password"
 641         printf "  => done. if you didn't specify , default is 'toor'\n"
 642         if [[ -n "${forced_password}" ]]; then
 643             store_user_message "${user} has the password you give for him"
 644         else
 645             store_user_message "${user} has the default password 'toor', please change it ASAP"
 646         fi
 647     fi
 648
 649     printf " => done.\n"
 650 }
 651
 652 ################################################################################
 653 #                        lxc configuration files
 654 ################################################################################
 655
 656 container_conf()
 657 {
 658     printf "container_configuration(): making lxc configuration file... \n"
 659
 660     #at this point if there
 661     conf_file="${path}/config"
 662
 663     if grep -q "^lxc.rootfs" "${conf_file}" ; then
 664         #lxc-create already provided one
 665         conf_rootfs_line=""
 666     else
 667         conf_rootfs_line="lxc.rootfs = $(readlink -f "${rootfs}")"
 668     fi
 669     if [[ "${arch}" == "x86" || "${arch}" == "amd64" ]]; then
 670         local conf_arch_line="lxc.arch = ${arch}"
 671     else
 672         local conf_arch_line="# lxc.arch = ${arch}"
 673     fi
 674
 675     cat <<- EOF >> "${conf_file}"
 676 # sets container architecture
 677 # If desired architecture != amd64 or x86, then we leave it unset as
 678 # LXC does not oficially support anything other than x86 or amd64.
 679 ${conf_arch_line}
 680
 681 # set the hostname
 682 lxc.utsname = ${name}
 683 lxc.tty = ${tty}
 684
 685 ${conf_rootfs_line}
 686 ${portage_mount}
 687 ${conf_sysfs}
 688 ${conf_mounts}
 689
 690 lxc.include = ${LXC_TEMPLATE_CONFIG}/gentoo.${settings}.conf
 691 EOF
 692     printf  " => done.\n"
 693 }
 694
 695 usage()
 696 {
 697     cat <<EOF
 698 $1 -h|--help [-a|--arch <arch>] [-v|--variant <variant>] [-P|--private-portage] [--portage-dir <protagedir>] [-t|--tarball <stage3file>]
 699  [-F|--flush-cache] [-c|--cache-only] [-u|--user <username>] [-w|--password <password>] [--autologin] [-S|--auth-key <keyfile>]
 700  [-s|--settings <name>] [-m|--mirror <gentoomirror>] [--tty <number>]
 701
 702 arch: the container architecture (e.g. amd64): defaults to host arch (currently: '${arch}')
 703     If you choose one that needs emulation
 704     tested: amd64, x86
 705     You could try any other gentoo arch, why not...
 706
 707 variant: gentoo's Architecture variant as of dec 2013 : (currently: '${variant}')
 708     for amd64 arch: amd64 (default), amd64-hardened+nomultilib, amd64-hardened, amd64-nomultilib, x32
 709     for x86 arch: i686 (default), i486, i686-hardened
 710     for arm arch: armv7a (default), armv7a_hardfp, armv6j, armv6j_hardfp, armv5tel, armv4tl
 711
 712 private-portage: by default, /usr/portage is mount-binded with host one if exists (currently: '${private_portage}')
 713     this force container to have his own copy
 714
 715 portage-dir: portage dir used for shared portage
 716     by default the host on if any (currently: '${portage_dir}')
 717
 718 tarball: force usage of local stage3 archive (currently: '${arch}')
 719     If empty, latest will be downloaded
 720
 721 flush-cache: do like there is no previous cache
 722
 723 cache-only: just ensure cache is present
 724     if cache exists and "flush-cache" not specified, does nothing
 725
 726 user: user used in auth oriented options (currently: '${user}')
 727
 728 password: password for user (currently: '${password}')
 729     if default, usage of auth-key will disable password setting
 730
 731 autologin: enable autologin for user (currently: '${autologin}')
 732     This unset default password setting
 733
 734 auth-key: SSH Public key file to inject into container for user (currently: '${auth_key}')
 735     This unset default password setting
 736
 737 settings: choose common configuration (currently: '${settings}')
 738     see ${LXC_TEMPLATE_CONFIG}/gentoo.*.conf
 739     Available settings:
 740     $(ls -1 ${LXC_TEMPLATE_CONFIG}/gentoo.*.conf | xargs basename -a -s .conf | sed 's/^gentoo.//')
 741
 742 mirror: gentoo mirror for download (currently: '${mirror}')
 743
 744 tty: number of tty (6 max) (currently: '${tty}')
 745 EOF
 746     exit 0
 747 }
 748
 749 #some overridable defaults
 750 set_default_arch
 751
 752 mirror="http://distfiles.gentoo.org"
 753 user="root"
 754 password="toor"
 755 tty=1
 756 settings="common"
 757 options=$(getopt -o hp:n:a:FcPv:t:S:u:w:s:m: -l help,rootfs:,path:,name:,arch:,flush-cache,cache-only,private-portage,variant:,portage-dir:,tarball:,auth_key:,user:,autologin,password:,settings:,mirror:,tty: -- "$@")
 758
 759 eval set -- "$options"
 760
 761 while true
 762 do
 763     case "$1" in
 764     -h|--help)             usage $0 && exit 0;;
 765     --rootfs)              rootfs=$2; shift 2;;
 766     -p|--path)             path=$2; shift 2;;
 767     -n|--name)             name=$2; shift 2;;
 768     -a|--arch)             arch=$2; shift 2;;
 769     -F|--flush-cache)      flush_cache=1; shift 1;;
 770     -c|--cache-only)       cache_only=1; shitf 1;;
 771     -P|--private-portage)  private_portage=1; shift 1;;
 772     -v|--variant)          variant=$2; shift 2;;
 773     --portage-dir)         portage_dir=$2; shift 2;;
 774     -t|--tarball)          tarball=$2; shift 2;;
 775     -S|--auth-key)         auth_key=$2; shift 2;;
 776     -u|--user)             user=$2; shift 2;;
 777     -w|--password)         forced_password=1; password=$2; shift 2;;
 778     -s|--settings)         settings=$2; shift 2;;
 779     -m|--mirror)           mirror=$2; shift 2;;
 780     --tty)                 [[ $2 -lt 6 ]] && tty=$2; shift 2;;
 781     --autologin)            autologin=1; shift 1;;
 782     --) shift 1; break ;;
 783     *)           break ;;
 784     esac
 785 done
 786
 787 cacheroot="@LOCALSTATEDIR@/cache/lxc/gentoo"
 788 portage_cache="${cacheroot}/portage.tbz"
 789 cachefs="${cacheroot}/rootfs-${arch}-${variant}"
 790
 791 alias wget="wget --timeout=8 --read-timeout=15 -c -t10 -nd"
 792
 793 do_all() {
 794     cache_setup
 795     if [ -z "${cache_only}" ]; then
 796         container_setup
 797     fi
 798 }
 799
 800 execute_exclusively "cache-${arch}-${variant}" 60 do_all