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Merge pull request #751 from jirutka/alpine-tmpl
Rewrite template script for Alpine Linux
This commit is contained in:
Christian Brauner
commit
127ef998ed
@ -5,6 +5,8 @@ EXTRA_DIST = common.seccomp
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SUBDIRS = common.conf.d
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templatesconfig_DATA = \
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alpine.common.conf \
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alpine.userns.conf \
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archlinux.common.conf \
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archlinux.userns.conf \
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centos.common.conf \
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20
config/templates/alpine.common.conf.in
Normal file
20
config/templates/alpine.common.conf.in
Normal file
@ -0,0 +1,20 @@
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# This derives from the global common config.
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lxc.include = @LXCTEMPLATECONFIG@/common.conf
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# Doesn't support consoles in /dev/lxc/.
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lxc.devttydir =
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# Drop another (potentially) harmful capabilities.
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lxc.cap.drop = audit_write
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lxc.cap.drop = ipc_owner
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lxc.cap.drop = mknod
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lxc.cap.drop = setfcap
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lxc.cap.drop = setpcap
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lxc.cap.drop = sys_nice
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lxc.cap.drop = sys_pacct
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lxc.cap.drop = sys_ptrace
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lxc.cap.drop = sys_rawio
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lxc.cap.drop = sys_resource
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lxc.cap.drop = sys_tty_config
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lxc.cap.drop = syslog
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lxc.cap.drop = wake_alarm
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2
config/templates/alpine.userns.conf.in
Normal file
2
config/templates/alpine.userns.conf.in
Normal file
@ -0,0 +1,2 @@
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# This derives from the global userns config.
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lxc.include = @LXCTEMPLATECONFIG@/userns.conf
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@ -654,6 +654,8 @@ AC_CONFIG_FILES([
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config/init/upstart/Makefile
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config/etc/Makefile
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config/templates/Makefile
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config/templates/alpine.common.conf
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config/templates/alpine.userns.conf
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config/templates/archlinux.common.conf
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config/templates/archlinux.userns.conf
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config/templates/centos.common.conf
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@ -1,367 +1,505 @@
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#!/bin/sh
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# vim: set ts=4:
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# Detect use under userns (unsupported)
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for arg in "$@"; do
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[ "$arg" = "--" ] && break
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if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
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echo "This template can't be used for unprivileged containers." 1>&2
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echo "You may want to try the \"download\" template instead." 1>&2
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exit 1
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fi
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done
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# Exit on error and treat unset variables as an error.
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set -eu
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#
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# LXC template for Alpine Linux 3+
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#
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# Note: Do not replace tabs with spaces, it would break heredocs!
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# Authors:
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# Jakub Jirutka <jakub@jirutka.cz>
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#=========================== Constants ============================#
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# Make sure the usual locations are in PATH
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PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
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export PATH
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export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
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key_sha256sums="9c102bcc376af1498d549b77bdbfa815ae86faa1d2d82f040e616b18ef2df2d4 alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub
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readonly LOCAL_STATE_DIR='@LOCALSTATEDIR@'
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readonly LXC_TEMPLATE_CONFIG='@LXCTEMPLATECONFIG@'
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readonly LXC_CACHE_DIR="${LXC_CACHE_PATH:-"$LOCAL_STATE_DIR/cache/lxc"}/alpine"
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# SHA256 checksums of GPG keys for APK.
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readonly APK_KEYS_SHA256="\
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9c102bcc376af1498d549b77bdbfa815ae86faa1d2d82f040e616b18ef2df2d4 alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub
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2adcf7ce224f476330b5360ca5edb92fd0bf91c92d83292ed028d7c4e26333ab alpine-devel@lists.alpinelinux.org-4d07755e.rsa.pub
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ebf31683b56410ecc4c00acd9f6e2839e237a3b62b5ae7ef686705c7ba0396a9 alpine-devel@lists.alpinelinux.org-5243ef4b.rsa.pub
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1bb2a846c0ea4ca9d0e7862f970863857fc33c32f5506098c636a62a726a847b alpine-devel@lists.alpinelinux.org-524d27bb.rsa.pub
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12f899e55a7691225603d6fb3324940fc51cd7f133e7ead788663c2b7eecb00c alpine-devel@lists.alpinelinux.org-5261cecb.rsa.pub"
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readonly APK_KEYS_URI='http://alpinelinux.org/keys'
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readonly MIRRORS_LIST_URL='http://rsync.alpinelinux.org/alpine/MIRRORS.txt'
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get_static_apk () {
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wget="wget -q -O -"
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pkglist=alpine-keys:apk-tools-static
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auto_repo_dir=
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: ${APK_KEYS_DIR:=/etc/apk/keys}
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if ! ls "$APK_KEYS_DIR"/alpine* >/dev/null 2>&1; then
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APK_KEYS_DIR="$LXC_CACHE_DIR/bootstrap/keys"
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fi
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readonly APK_KEYS_DIR
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if [ -z "$repository" ]; then
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url=http://wiki.alpinelinux.org/cgi-bin/dl.cgi
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yaml_path="latest-stable/releases/$apk_arch/latest-releases.yaml"
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if [ -z "$release" ]; then
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echo -n "Determining the latest release... "
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release=$($wget $url/$yaml_path | \
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awk '$1 == "branch:" {print $2; exit 0}')
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if [ -z "$release" ]; then
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release=$($wget $url/.latest.$apk_arch.txt | \
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cut -d " " -f 3 | cut -d / -f 1 | uniq)
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fi
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if [ -z "$release" ]; then
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echo failed
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return 1
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fi
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echo $release
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fi
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auto_repo_dir=$release/main
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repository=$url/$auto_repo_dir
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pkglist=$pkglist:alpine-mirrors
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fi
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: ${APK:=$(command -v apk || true)}
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if [ ! -x "$APK" ]; then
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APK="$LXC_CACHE_DIR/bootstrap/sbin/apk.static"
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fi
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readonly APK
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rootfs="$1"
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echo "Using static apk from $repository/$apk_arch"
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wget="$wget $repository/$apk_arch"
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# parse APKINDEX to find the current versions
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static_pkgs=$($wget/APKINDEX.tar.gz | \
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tar -Oxz APKINDEX | \
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awk -F: -v pkglist=$pkglist '
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BEGIN { split(pkglist,pkg) }
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$0 != "" { f[$1] = $2 }
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$0 == "" { for (i in pkg)
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if (pkg[i] == f["P"])
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print(f["P"] "-" f["V"] ".apk") }')
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[ "$static_pkgs" ] || return 1
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#======================== Helper Functions ========================#
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mkdir -p "$rootfs" || return 1
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for pkg in $static_pkgs; do
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echo "Downloading $pkg"
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$wget/$pkg | tar -xz -C "$rootfs"
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done
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usage() {
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cat <<-EOF
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Template specific options can be passed to lxc-create after a '--' like this:
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# clean up .apk meta files
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rm -f "$rootfs"/.[A-Z]*
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lxc-create --name=NAME [lxc-create-options] -- [template-options] [PKG...]
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# verify checksum of the key
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keyname=$(echo $rootfs/sbin/apk.static.*.pub | sed 's/.*\.SIGN\.RSA\.//')
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checksum=$(echo "$key_sha256sums" | grep -w "$keyname")
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if [ -z "$checksum" ]; then
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echo "ERROR: checksum is missing for $keyname"
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return 1
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fi
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(cd $rootfs/etc/apk/keys && echo "$checksum" | sha256sum -c -) || return 1
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PKG Additional APK package(s) to install into the container.
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# verify the static apk binary signature
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APK=$rootfs/sbin/apk.static
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openssl dgst -sha1 -verify $rootfs/etc/apk/keys/$keyname \
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-signature "$APK.SIGN.RSA.$keyname" "$APK" || return 1
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Template options:
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-a ARCH, --arch=ARCH The container architecture (e.g. x86, x86_64); defaults
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to the host arch.
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-d, --debug Run this script in a debug mode (set -x and wget w/o -q).
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-F, --flush-cache Remove cached files before build.
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-m URL --mirror=URL The Alpine mirror to use; defaults to random mirror.
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-r VER, --release=VER The Alpine release branch to install; default is the
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latest stable.
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if [ "$auto_repo_dir" ]; then
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mirror_list=$rootfs/usr/share/alpine-mirrors/MIRRORS.txt
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mirror_count=$(wc -l $mirror_list | cut -d " " -f 1)
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random=$(hexdump -n 2 -e '/2 "%u"' /dev/urandom)
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repository=$(sed $(expr $random % $mirror_count + 1)\!d \
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$mirror_list)$auto_repo_dir
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echo "Selecting mirror $repository"
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fi
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}
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install_alpine() {
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rootfs="$1"
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shift
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mkdir -p "$rootfs"/etc/apk || return 1
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: ${keys_dir:=/etc/apk/keys}
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if ! [ -d "$rootfs"/etc/apk/keys ] && [ -d "$keys_dir" ]; then
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cp -r "$keys_dir" "$rootfs"/etc/apk/keys
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fi
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if [ -n "$repository" ]; then
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echo "$repository" > "$rootfs"/etc/apk/repositories
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else
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cp /etc/apk/repositories "$rootfs"/etc/apk/repositories || return 1
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if [ -n "$release" ]; then
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sed -E -i "s:/[^/]+/([^/]+)$:/$release/\\1:" \
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"$rootfs"/etc/apk/repositories
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fi
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fi
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opt_arch=
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if [ -n "$apk_arch" ]; then
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opt_arch="--arch $apk_arch"
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fi
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$APK add -U --initdb --root $rootfs $opt_arch "$@" alpine-base
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}
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configure_alpine() {
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rootfs="$1"
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echo "Setting up /etc/inittab"
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cat >"$rootfs"/etc/inittab<<EOF
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::sysinit:/sbin/rc sysinit
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::wait:/sbin/rc default
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console:12345:respawn:/sbin/getty 38400 console
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tty1:12345:respawn:/sbin/getty 38400 tty1
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tty2:12345:respawn:/sbin/getty 38400 tty2
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tty3:12345:respawn:/sbin/getty 38400 tty3
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tty4:12345:respawn:/sbin/getty 38400 tty4
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::ctrlaltdel:/sbin/reboot
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::shutdown:/sbin/rc shutdown
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EOF
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# set up timezone
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if [ -f /etc/TZ ]; then
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cp /etc/TZ "$rootfs/etc/TZ"
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fi
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# set up nameserver
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grep nameserver /etc/resolv.conf > "$rootfs/etc/resolv.conf"
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# configure the network using the dhcp
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cat <<EOF > $rootfs/etc/network/interfaces
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet dhcp
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EOF
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# set the hostname
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echo $hostname > $rootfs/etc/hostname
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# missing device nodes
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echo "Setting up device nodes"
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mkdir -p -m 755 "$rootfs/dev/pts"
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mkdir -p -m 1777 "$rootfs/dev/shm"
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mknod -m 666 "$rootfs/dev/zero" c 1 5
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mknod -m 666 "$rootfs/dev/full" c 1 7
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mknod -m 666 "$rootfs/dev/random" c 1 8
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mknod -m 666 "$rootfs/dev/urandom" c 1 9
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mknod -m 666 "$rootfs/dev/tty0" c 4 0
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mknod -m 666 "$rootfs/dev/tty1" c 4 1
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mknod -m 666 "$rootfs/dev/tty2" c 4 2
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mknod -m 666 "$rootfs/dev/tty3" c 4 3
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mknod -m 666 "$rootfs/dev/tty4" c 4 4
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# mknod -m 600 "$rootfs/dev/initctl" p
|
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mknod -m 666 "$rootfs/dev/tty" c 5 0
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mknod -m 666 "$rootfs/dev/console" c 5 1
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mknod -m 666 "$rootfs/dev/ptmx" c 5 2
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# start services
|
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ln -s /etc/init.d/bootmisc "$rootfs"/etc/runlevels/boot/bootmisc
|
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ln -s /etc/init.d/syslog "$rootfs"/etc/runlevels/boot/syslog
|
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return 0
|
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}
|
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copy_configuration() {
|
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path=$1
|
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rootfs=$2
|
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hostname=$3
|
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|
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grep -q "^lxc.rootfs" $path/config 2>/dev/null \
|
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|| echo "lxc.rootfs = $rootfs" >> $path/config
|
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if [ -n "$lxc_arch" ]; then
|
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echo "lxc.arch = $lxc_arch" >> $path/config
|
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fi
|
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|
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lxc_network_link_line="# lxc.network.link = br0"
|
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for br in lxcbr0 virbr0 br0; do
|
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if [ -d /sys/class/net/$br/bridge ]; then
|
||||
lxc_network_link_line="lxc.network.link = $br"
|
||||
break
|
||||
fi
|
||||
done
|
||||
|
||||
if ! grep -q "^lxc.network.type" $path/config 2>/dev/null; then
|
||||
cat <<EOF >> $path/config
|
||||
lxc.network.type = veth
|
||||
$lxc_network_link_line
|
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lxc.network.flags = up
|
||||
EOF
|
||||
fi
|
||||
|
||||
# if there is exactly one veth or macvlan network entry, make sure
|
||||
# it has an associated mac address.
|
||||
nics=$(awk -F '[ \t]*=[ \t]*' \
|
||||
'$1=="lxc.network.type" && ($2=="veth" || $2=="macvlan") {print $2}' \
|
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$path/config | wc -l)
|
||||
if [ "$nics" -eq 1 ] && ! grep -q "^lxc.network.hwaddr" $path/config; then
|
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# see http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
|
||||
hwaddr="fe:$(dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 | \
|
||||
head -n 1 |awk '{print $2}' | cut -c1-10 |\
|
||||
sed 's/\(..\)/\1:/g; s/.$//')"
|
||||
echo "lxc.network.hwaddr = $hwaddr" >> $path/config
|
||||
fi
|
||||
|
||||
cat <<EOF >> $path/config
|
||||
|
||||
lxc.tty = 4
|
||||
lxc.pts = 1024
|
||||
lxc.utsname = $hostname
|
||||
lxc.cap.drop = sys_module mac_admin mac_override sys_time sys_admin
|
||||
|
||||
# When using LXC with apparmor, uncomment the next line to run unconfined:
|
||||
#lxc.aa_profile = unconfined
|
||||
|
||||
# devices
|
||||
lxc.cgroup.devices.deny = a
|
||||
# /dev/null, zero and full
|
||||
lxc.cgroup.devices.allow = c 1:3 rwm
|
||||
lxc.cgroup.devices.allow = c 1:5 rwm
|
||||
lxc.cgroup.devices.allow = c 1:7 rwm
|
||||
# consoles
|
||||
lxc.cgroup.devices.allow = c 5:1 rwm
|
||||
lxc.cgroup.devices.allow = c 5:0 rwm
|
||||
lxc.cgroup.devices.allow = c 4:0 rwm
|
||||
lxc.cgroup.devices.allow = c 4:1 rwm
|
||||
# /dev/{,u}random
|
||||
lxc.cgroup.devices.allow = c 1:9 rwm
|
||||
lxc.cgroup.devices.allow = c 1:8 rwm
|
||||
lxc.cgroup.devices.allow = c 136:* rwm
|
||||
lxc.cgroup.devices.allow = c 5:2 rwm
|
||||
# rtc
|
||||
lxc.cgroup.devices.allow = c 254:0 rm
|
||||
|
||||
# mounts point
|
||||
lxc.mount.auto=cgroup:mixed proc:mixed sys:mixed
|
||||
lxc.mount.entry=run run tmpfs nodev,noexec,nosuid,relatime,size=1m,mode=0755 0 0
|
||||
lxc.mount.entry=shm dev/shm tmpfs nodev,nosuid,noexec,mode=1777,create=dir 0 0
|
||||
|
||||
EOF
|
||||
|
||||
return 0
|
||||
Environment variables:
|
||||
APK The apk-tools binary to use when building rootfs. If not set
|
||||
or not executable and apk is not on PATH, then the script
|
||||
will download the latest apk-tools-static.
|
||||
APK_KEYS_DIR Path to directory with GPG keys for APK. If not set and
|
||||
/etc/apk/keys does not contain alpine keys, then the script
|
||||
will download the keys from ${APK_KEYS_URI}.
|
||||
LXC_CACHE_PATH Path to the cache directory where to store bootstrap files
|
||||
and APK packages.
|
||||
EOF
|
||||
}
|
||||
|
||||
die() {
|
||||
echo "$@" >&2
|
||||
exit 1
|
||||
local retval=$1; shift
|
||||
|
||||
printf 'ERROR: %s\n' "$@" 1>&2
|
||||
exit $retval
|
||||
}
|
||||
|
||||
usage() {
|
||||
cat >&2 <<EOF
|
||||
Usage: $(basename $0) [-h|--help] [-r|--repository <url>]
|
||||
[-R|--release <release>] [-a|--arch <arch>]
|
||||
[--rootfs <rootfs>] -p|--path <path> -n|--name <name>
|
||||
[PKG...]
|
||||
einfo() {
|
||||
printf "\n==> $1\n"
|
||||
}
|
||||
|
||||
fetch() {
|
||||
if [ "$DEBUG" = 'yes' ]; then
|
||||
wget -T 10 -O - $@
|
||||
else
|
||||
wget -T 10 -O - -q $@
|
||||
fi
|
||||
}
|
||||
|
||||
latest_release_branch() {
|
||||
local arch="$1"
|
||||
local branch=$(fetch "$MIRROR_URL/latest-stable/releases/$arch/latest-releases.yaml" \
|
||||
| sed -En 's/^[ \t]*branch: (.*)$/\1/p' \
|
||||
| head -n 1)
|
||||
[ -n "$branch" ] && echo "$branch"
|
||||
}
|
||||
|
||||
parse_arch() {
|
||||
case "$1" in
|
||||
x86 | i[3-6]86) echo 'x86';;
|
||||
x86_64 | amd64) echo 'x86_64';;
|
||||
arm*) echo 'armhf';;
|
||||
*) return 1;;
|
||||
esac
|
||||
}
|
||||
|
||||
random_mirror_url() {
|
||||
local url=$(fetch "$MIRRORS_LIST_URL" | shuf -n 1)
|
||||
[ -n "$url" ] && echo "$url"
|
||||
}
|
||||
|
||||
run_exclusively() {
|
||||
local lock_name="$1"
|
||||
local timeout=$2
|
||||
shift 2
|
||||
|
||||
mkdir -p "$LOCAL_STATE_DIR/lock/subsys"
|
||||
|
||||
local retval
|
||||
{
|
||||
echo -n "Obtaining an exclusive lock..."
|
||||
if ! flock -x 9; then
|
||||
echo ' failed.'
|
||||
return 1
|
||||
fi
|
||||
echo ' done'
|
||||
|
||||
"$@"; retval=$?
|
||||
} 9> "$LOCAL_STATE_DIR/lock/subsys/lxc-alpine-$lock_name"
|
||||
|
||||
return $retval
|
||||
}
|
||||
|
||||
|
||||
#============================ Bootstrap ===========================#
|
||||
|
||||
bootstrap() {
|
||||
if [ "$FLUSH_CACHE" = 'yes' ] && [ -d "$LXC_CACHE_DIR/bootstrap" ]; then
|
||||
einfo 'Cleaning cached bootstrap files'
|
||||
rm -Rf "$LXC_CACHE_DIR/bootstrap"
|
||||
fi
|
||||
|
||||
einfo 'Fetching and/or verifying APK keys'
|
||||
fetch_apk_keys "$APK_KEYS_DIR"
|
||||
|
||||
if [ ! -x "$APK" ]; then
|
||||
einfo 'Fetching apk-tools static binary'
|
||||
|
||||
local host_arch=$(parse_arch $(uname -m))
|
||||
fetch_apk_static "$LXC_CACHE_DIR/bootstrap" "$host_arch"
|
||||
fi
|
||||
}
|
||||
|
||||
fetch_apk_keys() {
|
||||
local dest="$1"
|
||||
local line keyname
|
||||
|
||||
mkdir -p "$dest"
|
||||
cd "$dest"
|
||||
|
||||
echo "$APK_KEYS_SHA256" | while read -r line; do
|
||||
keyname="${line##* }"
|
||||
if [ ! -f "$keyname" ]; then
|
||||
fetch "$APK_KEYS_URI/$keyname" > "$keyname"
|
||||
fi
|
||||
echo "$line" | sha256sum -c -
|
||||
done || exit 2
|
||||
|
||||
cd - >/dev/null
|
||||
}
|
||||
|
||||
fetch_apk_static() {
|
||||
local dest="$1"
|
||||
local arch="$2"
|
||||
local pkg_name='apk-tools-static'
|
||||
|
||||
mkdir -p "$dest"
|
||||
|
||||
local pkg_ver=$(fetch "$MIRROR_URL/latest-stable/main/$arch/APKINDEX.tar.gz" \
|
||||
| tar -xzO APKINDEX \
|
||||
| sed -n "/P:${pkg_name}/,/^$/ s/V:\(.*\)$/\1/p")
|
||||
|
||||
[ -n "$pkg_ver" ] || die 2 "Cannot find a version of $pkg_name in APKINDEX"
|
||||
|
||||
fetch "$MIRROR_URL/latest-stable/main/$arch/${pkg_name}-${pkg_ver}.apk" \
|
||||
| tar -xz -C "$dest" sbin/ # --extract --gzip --directory
|
||||
|
||||
[ -f "$dest/sbin/apk.static" ] || die 2 'apk.static not found'
|
||||
|
||||
local keyname=$(echo "$dest"/sbin/apk.static.*.pub | sed 's/.*\.SIGN\.RSA\.//')
|
||||
openssl dgst -sha1 \
|
||||
-verify "$APK_KEYS_DIR/$keyname" \
|
||||
-signature "$dest/sbin/apk.static.SIGN.RSA.$keyname" \
|
||||
"$dest/sbin/apk.static" \
|
||||
|| die 2 'Signature verification for apk.static failed'
|
||||
|
||||
# Note: apk doesn't return 0 for --version
|
||||
local out="$("$dest"/sbin/apk.static --version)"
|
||||
echo "$out"
|
||||
|
||||
[ "${out%% *}" = 'apk-tools' ] || die 3 'apk.static --version failed'
|
||||
}
|
||||
|
||||
|
||||
#============================ Install ============================#
|
||||
|
||||
install() {
|
||||
local dest="$1"
|
||||
local arch="$2"
|
||||
local branch="$3"
|
||||
local extra_packages="$4"
|
||||
local apk_cache="$LXC_CACHE_DIR/apk/$arch"
|
||||
local repo_url="$MIRROR_URL/$branch/main"
|
||||
|
||||
if [ "$FLUSH_CACHE" = 'yes' ] && [ -d "$apk_cache" ]; then
|
||||
einfo "Cleaning cached APK packages for $arch"
|
||||
rm -Rf "$apk_cache"
|
||||
fi
|
||||
mkdir -p "$apk_cache"
|
||||
|
||||
einfo "Installing Alpine Linux in $dest"
|
||||
cd "$dest"
|
||||
|
||||
mkdir -p etc/apk
|
||||
ln -s "$apk_cache" etc/apk/cache
|
||||
echo "$repo_url" > etc/apk/repositories
|
||||
|
||||
install_packages "$arch" alpine-base $extra_packages
|
||||
make_dev_nodes
|
||||
setup_inittab
|
||||
setup_hosts
|
||||
setup_network
|
||||
setup_services
|
||||
|
||||
chroot . /bin/true \
|
||||
|| die 3 'Failed to execute /bin/true in chroot, the builded rootfs is broken!'
|
||||
|
||||
rm etc/apk/cache
|
||||
cd - >/dev/null
|
||||
}
|
||||
|
||||
install_packages() {
|
||||
local arch="$1"; shift
|
||||
local packages="$@"
|
||||
|
||||
$APK --arch="$arch" --root=. --keys-dir="$APK_KEYS_DIR" \
|
||||
--update-cache --initdb add $packages
|
||||
}
|
||||
|
||||
make_dev_nodes() {
|
||||
mkdir -p -m 755 dev/pts
|
||||
mkdir -p -m 1777 dev/shm
|
||||
|
||||
mknod -m 666 dev/zero c 1 5
|
||||
mknod -m 666 dev/full c 1 7
|
||||
mknod -m 666 dev/random c 1 8
|
||||
mknod -m 666 dev/urandom c 1 9
|
||||
|
||||
local i; for i in $(seq 0 4); do
|
||||
mknod -m 620 dev/tty$i c 4 $i
|
||||
chown 0:5 dev/tty$i # root:tty
|
||||
done
|
||||
|
||||
mknod -m 666 dev/tty c 5 0
|
||||
chown 0:5 dev/tty # root:tty
|
||||
mknod -m 620 dev/console c 5 1
|
||||
mknod -m 666 dev/ptmx c 5 2
|
||||
chown 0:5 dev/ptmx # root:tty
|
||||
}
|
||||
|
||||
setup_inittab() {
|
||||
# Remove unwanted ttys.
|
||||
sed -i '/^tty[5-9]\:\:.*$/d' etc/inittab
|
||||
|
||||
cat <<-EOF >> etc/inittab
|
||||
# Main LXC console console
|
||||
::respawn:/sbin/getty 38400 console
|
||||
EOF
|
||||
}
|
||||
|
||||
setup_hosts() {
|
||||
# This runscript injects localhost entries with the current hostname
|
||||
# into /etc/hosts.
|
||||
cat <<'EOF' > etc/init.d/hosts
|
||||
#!/sbin/openrc-run
|
||||
|
||||
start() {
|
||||
local start_tag='# begin generated'
|
||||
local end_tag='# end generated'
|
||||
|
||||
local content=$(
|
||||
cat <<-EOF
|
||||
$start_tag by /etc/init.d/hosts
|
||||
127.0.0.1 $(hostname).local $(hostname) localhost
|
||||
::1 $(hostname).local $(hostname) localhost
|
||||
$end_tag
|
||||
EOF
|
||||
)
|
||||
|
||||
if grep -q "^${start_tag}" /etc/hosts; then
|
||||
# escape \n, busybox sed doesn't like them
|
||||
content=${content//$'\n'/\\$'\n'}
|
||||
|
||||
sed -ni "/^${start_tag}/ {
|
||||
a\\${content}
|
||||
# read and discard next line and repeat until $end_tag or EOF
|
||||
:a; n; /^${end_tag}/!ba; n
|
||||
}; p" /etc/hosts
|
||||
else
|
||||
printf "$content" >> /etc/hosts
|
||||
fi
|
||||
}
|
||||
EOF
|
||||
chmod +x etc/init.d/hosts
|
||||
|
||||
# Wipe it, will be generated by the above runscript.
|
||||
echo -n > etc/hosts
|
||||
}
|
||||
|
||||
usage_err() {
|
||||
usage
|
||||
exit 1
|
||||
setup_network() {
|
||||
# Note: loopback is automatically started by LXC.
|
||||
cat <<-EOF > etc/network/interfaces
|
||||
auto eth0
|
||||
iface eth0 inet dhcp
|
||||
EOF
|
||||
}
|
||||
|
||||
default_path=@LXCPATH@
|
||||
release=
|
||||
arch=$(uname -m)
|
||||
setup_services() {
|
||||
local svc_name
|
||||
|
||||
# template mknods, requires root
|
||||
if [ $(id -u) -ne 0 ]; then
|
||||
echo "$(basename $0): must be run as root" >&2
|
||||
exit 1
|
||||
# Specify the LXC subsystem.
|
||||
sed -i 's/^#*rc_sys=.*/rc_sys="lxc"/' etc/rc.conf
|
||||
|
||||
# boot runlevel
|
||||
for svc_name in bootmisc hosts syslog; do
|
||||
ln -s /etc/init.d/$svc_name etc/runlevels/boot/$svc_name
|
||||
done
|
||||
|
||||
# default runlevel
|
||||
for svc_name in networking cron; do
|
||||
ln -s /etc/init.d/$svc_name etc/runlevels/default/$svc_name
|
||||
done
|
||||
}
|
||||
|
||||
|
||||
#=========================== Configure ===========================#
|
||||
|
||||
configure_container() {
|
||||
local config="$1"
|
||||
local hostname="$2"
|
||||
local arch="$3"
|
||||
|
||||
cat <<-EOF >> "$config"
|
||||
|
||||
# Specify container architecture.
|
||||
lxc.arch = $arch
|
||||
|
||||
# Set hostname.
|
||||
lxc.utsname = $hostname
|
||||
|
||||
# If something doesn't work, try to comment this out.
|
||||
# Dropping sys_admin disables container root from doing a lot of things
|
||||
# that could be bad like re-mounting lxc fstab entries rw for example,
|
||||
# but also disables some useful things like being able to nfs mount, and
|
||||
# things that are already namespaced with ns_capable() kernel checks, like
|
||||
# hostname(1).
|
||||
lxc.cap.drop = sys_admin
|
||||
|
||||
# Include common configuration.
|
||||
lxc.include = $LXC_TEMPLATE_CONFIG/alpine.common.conf
|
||||
EOF
|
||||
}
|
||||
|
||||
|
||||
#============================= Main ==============================#
|
||||
|
||||
if [ "$(id -u)" != "0" ]; then
|
||||
die 1 "This script must be run as 'root'"
|
||||
fi
|
||||
|
||||
options=$(getopt -o hn:p:r:R:a: -l help,name:,rootfs:,path:,repository:,release:,arch: -- "$@")
|
||||
[ $? -eq 0 ] || usage_err
|
||||
# Parse command options.
|
||||
options=$(getopt -o a:dFm:n:p:r:h -l arch:,debug,flush-cache,mirror:,name:,\
|
||||
path:,release:,rootfs:,help,mapped-uid:,mapped-gid: -- "$@")
|
||||
eval set -- "$options"
|
||||
|
||||
# Clean variables and set defaults.
|
||||
arch="$(uname -m)"
|
||||
debug='no'
|
||||
flush_cache='no'
|
||||
mirror_url=
|
||||
name=
|
||||
path=
|
||||
release=
|
||||
rootfs=
|
||||
|
||||
# Process command options.
|
||||
while [ $# -gt 0 ]; do
|
||||
case "$1" in
|
||||
-h|--help)
|
||||
usage
|
||||
exit 0
|
||||
;;
|
||||
-n|--name)
|
||||
name=$2
|
||||
;;
|
||||
--rootfs)
|
||||
rootfs=$2
|
||||
;;
|
||||
-p|--path)
|
||||
path=$2
|
||||
;;
|
||||
-r|--repository)
|
||||
repository=$2
|
||||
;;
|
||||
-R|--release)
|
||||
release=$2
|
||||
;;
|
||||
-a|--arch)
|
||||
arch=$2
|
||||
;;
|
||||
--)
|
||||
shift
|
||||
break;;
|
||||
esac
|
||||
shift 2
|
||||
case $1 in
|
||||
-a | --arch)
|
||||
arch=$2; shift 2
|
||||
;;
|
||||
-d | --debug)
|
||||
debug='yes'; shift 1
|
||||
;;
|
||||
-F | --flush-cache)
|
||||
flush_cache='yes'; shift 1
|
||||
;;
|
||||
-m | --mirror)
|
||||
mirror_url=$2; shift 2
|
||||
;;
|
||||
-n | --name)
|
||||
name=$2; shift 2
|
||||
;;
|
||||
-p | --path)
|
||||
path=$2; shift 2
|
||||
;;
|
||||
-r | --release)
|
||||
release=$2; shift 2
|
||||
;;
|
||||
--rootfs)
|
||||
rootfs=$2; shift 2
|
||||
;;
|
||||
-h | --help)
|
||||
usage; exit 0
|
||||
;;
|
||||
--)
|
||||
shift; break
|
||||
;;
|
||||
--mapped-[ug]id)
|
||||
die 1 "This template can't be used for unprivileged containers." \
|
||||
'You may want to try the "download" template instead.'
|
||||
;;
|
||||
*)
|
||||
echo "Unknown option: $1" 1>&2
|
||||
usage; exit 1
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
extra_packages="$@"
|
||||
|
||||
[ -z "$name" ] && usage_err
|
||||
[ "$debug" = 'yes' ] && set -x
|
||||
|
||||
if [ -z "${path}" ]; then
|
||||
path="${default_path}/${name}"
|
||||
# Set global variables.
|
||||
readonly DEBUG="$debug"
|
||||
readonly FLUSH_CACHE="$flush_cache"
|
||||
readonly MIRROR_URL="${mirror_url:-$(random_mirror_url)}"
|
||||
|
||||
# Validate options.
|
||||
[ -n "$name" ] || die 1 'Missing required option --name'
|
||||
[ -n "$path" ] || die 1 'Missing required option --path'
|
||||
|
||||
if [ -z "$rootfs" ] && [ -f "$path/config" ]; then
|
||||
rootfs="$(sed -nE 's/^lxc.rootfs\s*=\s*(.*)$/\1/p' "$path/config")"
|
||||
fi
|
||||
|
||||
if [ -z "$rootfs" ]; then
|
||||
rootfs=`awk -F= '$1 ~ /^lxc.rootfs/ { print $2 }' "$path/config" 2>/dev/null`
|
||||
if [ -z "$rootfs" ]; then
|
||||
rootfs="${path}/rootfs"
|
||||
fi
|
||||
rootfs="$path/rootfs"
|
||||
fi
|
||||
|
||||
lxc_arch=$arch
|
||||
apk_arch=$arch
|
||||
arch=$(parse_arch "$arch") \
|
||||
|| die 1 "Unsupported architecture: $arch"
|
||||
|
||||
case "$arch" in
|
||||
i[3-6]86)
|
||||
apk_arch=x86
|
||||
lxc_arch=x86
|
||||
;;
|
||||
x86)
|
||||
lxc_arch=i686
|
||||
;;
|
||||
x86_64|"")
|
||||
;;
|
||||
arm*)
|
||||
apk_arch=armhf
|
||||
;;
|
||||
*)
|
||||
die "unsupported architecture: $arch"
|
||||
;;
|
||||
esac
|
||||
|
||||
: ${APK:=apk}
|
||||
if ! which $APK >/dev/null; then
|
||||
get_static_apk "$rootfs" || die "Failed to download a valid static apk"
|
||||
if [ -z "$release" ]; then
|
||||
release=$(latest_release_branch "$arch") \
|
||||
|| die 2 'Failed to resolve Alpine last release branch'
|
||||
fi
|
||||
|
||||
install_alpine "$rootfs" "$@" || die "Failed to install rootfs for $name"
|
||||
configure_alpine "$rootfs" "$name" || die "Failed to configure $name"
|
||||
copy_configuration "$path" "$rootfs" "$name"
|
||||
# Here we go!
|
||||
run_exclusively 'bootstrap' 10 bootstrap
|
||||
run_exclusively "$arch" 30 install "$rootfs" "$arch" "$release" "$extra_packages"
|
||||
configure_container "$path/config" "$name" "$arch"
|
||||
|
||||
einfo "Container's rootfs and config have been created"
|
||||
cat <<-EOF
|
||||
Edit the config file $path/config to check/enable networking setup.
|
||||
The installed system is preconfigured for a loopback and single network
|
||||
interface configured via DHCP.
|
||||
|
||||
To start the container, run "lxc-start -n $name".
|
||||
The root password is not set; to enter the container run "lxc-attach -n $name".
|
||||
EOF
|
||||
|
||||
Loading…
Reference in New Issue
Block a user