630 lines
21 KiB
Text
630 lines
21 KiB
Text
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#!/bin/sh
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# vim: set ts=4 sw=4:
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# SPDX-FileCopyrightText: © 2017 Jakub Jirutka <jakub@jirutka.cz>
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# SPDX-License-Identifier: MIT
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#---help---
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# Usage: alpine-make-vm-image [options] [--] <image> [<script> [<script-opts...>]]
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#
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# This script creates a bootable Alpine Linux disk image for virtual machines.
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# If running on Alpine system (detected by file /etc/alpine-release), then it
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# also installs needed packages on the host system. On other systems you must
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# install them yourself: qemu-img, qemu-nbd, rsync, sfdisk, and mkfs utility
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# for the chosen ROOTFS. If $APK is not available on the host system, then
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# static apk-tools specified by $APK_TOOLS_URI is downloaded and used.
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#
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# Note that it does not create any partitions by default (it's really not
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# needed), filesystem is created directly on the image. If you must use some
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# platform that foolishly requires partitions in images, use --partition.
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#
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# Arguments:
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# <image> Path of disk image to use or create if not exists.
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#
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# <script> Path of script to execute after installing base system in
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# the mounted image and before umounting it.
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#
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# <script-opts> Arguments to pass to the script.
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#
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# Options and Environment Variables:
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# -b --branch ALPINE_BRANCH Alpine branch to install; used only when
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# --repositories-file is not specified. Default is
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# latest-stable.
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#
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# -S --fs-skel-dir FS_SKEL_DIR Path of directory which content to recursively copy
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# (using rsync) into / in the image.
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#
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# --fs-skel-chown FS_SKEL_CHOWN Force all files from FS_SKEL_DIR to be owned by the
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# specified USER:GROUP.
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#
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# -P --partition (PARTITION) Create GUID Partition Table (GPT) with a single partition.
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#
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# -f --image-format IMAGE_FORMAT Format of the disk image (see qemu-img --help).
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#
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# -s --image-size IMAGE_SIZE Size of the disk image to create in bytes or with suffix
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# (e.g. 1G, 1024M). Default is 2G.
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#
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# -i --initfs-features INITFS_FEATURES List of additional mkinitfs features (basically modules)
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# to be included in initramfs (see mkinitfs -L). "base" and
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# $ROOTFS is always included, don't specify them here.
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# Default is "scsi virtio".
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#
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# -k --kernel-flavor KERNEL_FLAVOR The kernel flavour to install; virt (default), lts
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# (Alpine >=3.11), or vanilla (Alpine <3.11).
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#
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# --keys-dir KEYS_DIR Path of directory with Alpine keys to copy into the image.
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# Default is /etc/apk/keys. If does not exist, keys for
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# x86_64 embedded in this script will be used.
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#
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# -m --mirror-uri ALPINE_MIRROR URI of the Aports mirror to fetch packages; used only
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# when --repositories-file is not specified. Default is
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# http://dl-cdn.alpinelinux.org/alpine.
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#
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# -C --no-cleanup (CLEANUP) Don't umount and disconnect image when done.
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#
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# -p --packages PACKAGES Additional packages to install into the image.
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#
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# -r --repositories-file REPOS_FILE Path of the repositories file to copy into the rootfs.
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# If not provided, Alpine's main and community repositories
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# on --mirror-uri will be used.
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#
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# --rootfs ROOTFS Filesystem to create on the image. Default is ext4.
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#
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# -c --script-chroot (SCRIPT_CHROOT) Bind <script>'s directory at /mnt inside image and chroot
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# into the image before executing <script>.
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#
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# -t --serial-console (SERIAL_CONSOLE) Add configuration for a serial console on ttyS0.
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#
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# -h --help Show this help message and exit.
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#
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# -v --version Print version and exit.
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#
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# APK APK command to use. Default is "apk".
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#
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# APK_OPTS Options to pass into apk on each execution.
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# Default is "--no-progress".
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#
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# APK_TOOLS_URI URL of apk-tools binary to download if $APK is not found
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# on the host system. Default is x86_64 apk.static from
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# https://gitlab.alpinelinux.org/alpine/apk-tools/-/packages.
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#
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# APK_TOOLS_SHA256 SHA-256 checksum of $APK_TOOLS_URI.
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#
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# Each option can be also provided by environment variable. If both option and
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# variable is specified and the option accepts only one argument, then the
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# option takes precedence.
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#
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# https://github.com/alpinelinux/alpine-make-vm-image
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#---help---
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set -eu
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# Some distros (e.g. Arch Linux) does not have /bin or /sbin in PATH.
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PATH="$PATH:/usr/sbin:/usr/bin:/sbin:/bin"
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readonly PROGNAME='alpine-make-vm-image'
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readonly VERSION='0.11.1'
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readonly VIRTUAL_PKG=".make-$PROGNAME"
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# An opaque string used to detect changes in resolv.conf.
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readonly RESOLVCONF_MARK="### created by $PROGNAME ###"
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# Alpine APK keys for verification of packages for x86_64.
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readonly ALPINE_KEYS='
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alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub:MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1yHJxQgsHQREclQu4Ohe\nqxTxd1tHcNnvnQTu/UrTky8wWvgXT+jpveroeWWnzmsYlDI93eLI2ORakxb3gA2O\nQ0Ry4ws8vhaxLQGC74uQR5+/yYrLuTKydFzuPaS1dK19qJPXB8GMdmFOijnXX4SA\njixuHLe1WW7kZVtjL7nufvpXkWBGjsfrvskdNA/5MfxAeBbqPgaq0QMEfxMAn6/R\nL5kNepi/Vr4S39Xvf2DzWkTLEK8pcnjNkt9/aafhWqFVW7m3HCAII6h/qlQNQKSo\nGuH34Q8GsFG30izUENV9avY7hSLq7nggsvknlNBZtFUcmGoQrtx3FmyYsIC8/R+B\nywIDAQAB
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alpine-devel@lists.alpinelinux.org-5261cecb.rsa.pub:MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwlzMkl7b5PBdfMzGdCT0\ncGloRr5xGgVmsdq5EtJvFkFAiN8Ac9MCFy/vAFmS8/7ZaGOXoCDWbYVLTLOO2qtX\nyHRl+7fJVh2N6qrDDFPmdgCi8NaE+3rITWXGrrQ1spJ0B6HIzTDNEjRKnD4xyg4j\ng01FMcJTU6E+V2JBY45CKN9dWr1JDM/nei/Pf0byBJlMp/mSSfjodykmz4Oe13xB\nCa1WTwgFykKYthoLGYrmo+LKIGpMoeEbY1kuUe04UiDe47l6Oggwnl+8XD1MeRWY\nsWgj8sF4dTcSfCMavK4zHRFFQbGp/YFJ/Ww6U9lA3Vq0wyEI6MCMQnoSMFwrbgZw\nwwIDAQAB
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alpine-devel@lists.alpinelinux.org-6165ee59.rsa.pub:MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAutQkua2CAig4VFSJ7v54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\nhtBqojBnThmjJQFgZXocHG8CAwEAAQ==
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'
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: ${APK_TOOLS_URI:="https://gitlab.alpinelinux.org/api/v4/projects/5/packages/generic/v2.12.10/x86_64/apk.static"}
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: ${APK_TOOLS_SHA256:="d7506bb11327b337960910daffed75aa289d8bb350feab624c52965be82ceae8"}
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: ${APK:="apk"}
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: ${APK_OPTS:="--no-progress"}
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# For compatibility with systems that does not have "realpath" command.
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if ! command -v realpath >/dev/null; then
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alias realpath='readlink -f'
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fi
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die() {
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printf '\033[1;31mERROR:\033[0m %s\n' "$@" >&2 # bold red
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exit 1
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}
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einfo() {
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printf '\n\033[1;36m> %s\033[0m\n' "$@" >&2 # bold cyan
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}
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# Prints help and exists with the specified status.
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help() {
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sed -En '/^#---help---/,/^#---help---/p' "$0" | sed -E 's/^# ?//; 1d;$d;'
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exit ${1:-0}
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}
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# Cleans the host system. This function is executed before exiting the script.
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cleanup() {
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set +eu
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trap '' EXIT HUP INT TERM # unset trap to avoid loop
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cd /
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if [ -d "$temp_dir" ]; then
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rm -Rf "$temp_dir"
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fi
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if [ "$mount_dir" ]; then
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umount_recursively "$mount_dir" \
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|| die "Failed to unmount $mount_dir; unmount it and disconnect $nbd_dev manually"
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rm -Rf "$mount_dir"
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fi
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if [ "$nbd_dev" ]; then
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qemu-nbd --disconnect "$nbd_dev" \
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|| die "Failed to disconnect $nbd_dev; disconnect it manually"
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fi
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if [ "$INSTALL_HOST_PKGS" = yes ]; then
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_apk del $VIRTUAL_PKG
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fi
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}
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_apk() {
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"$APK" $APK_OPTS "$@"
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}
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# Attaches the specified image as a NBD block device and prints its path.
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attach_image() {
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local image="$1"
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local format="${2:-}"
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local nbd_dev
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nbd_dev=$(get_available_nbd) || {
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modprobe nbd max_part=16
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sleep 1
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nbd_dev=$(get_available_nbd)
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} || die 'No available nbd device found!'
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qemu-nbd --connect="$nbd_dev" --cache=writeback \
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${format:+--format=$format} "$image" \
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&& echo "$nbd_dev"
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}
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# Prints UUID of filesystem on the specified block device.
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blk_uuid() {
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local dev="$1"
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blkid "$dev" | sed -En 's/.*UUID="([^"]+)".*/\1/p'
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}
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# Writes Alpine APK keys embedded in this script into directory $1.
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dump_alpine_keys() {
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local dest_dir="$1"
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local content file line
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mkdir -p "$dest_dir"
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for line in $ALPINE_KEYS; do
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file=${line%%:*}
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content=${line#*:}
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printf -- "-----BEGIN PUBLIC KEY-----\n$content\n-----END PUBLIC KEY-----\n" \
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> "$dest_dir/$file"
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done
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}
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# Prints path of available nbdX device, or returns 1 if not any.
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get_available_nbd() {
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local dev; for dev in $(find /dev -maxdepth 2 -name 'nbd[0-9]*'); do
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if [ "$(blockdev --getsize64 "$dev")" -eq 0 ]; then
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echo "$dev"; return 0
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fi
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done
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return 1
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}
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# Prints name of the package needed for creating the specified filesystem.
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fs_progs_pkg() {
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local fs="$1" # filesystem name
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case "$fs" in
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ext4) echo 'e2fsprogs';;
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btrfs) echo 'btrfs-progs';;
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xfs) echo 'xfsprogs';;
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esac
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}
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# Tests if the specified command exists on the system.
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has_cmd() {
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command -v "$1" >/dev/null
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}
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# Binds the directory $1 at the mountpoint $2 and sets propagation to private.
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mount_bind() {
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mkdir -p "$2"
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mount --bind "$1" "$2"
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mount --make-private "$2"
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}
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# Prepares chroot at the specified path.
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prepare_chroot() {
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local dest="$1"
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mkdir -p "$dest"/proc
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mount -t proc none "$dest"/proc
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mount_bind /dev "$dest"/dev
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mount_bind /sys "$dest"/sys
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install -D -m 644 /etc/resolv.conf "$dest"/etc/resolv.conf
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echo "$RESOLVCONF_MARK" >> "$dest"/etc/resolv.conf
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}
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# Adds specified services to the runlevel. Current working directory must be
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# root of the image.
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rc_add() {
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local runlevel="$1"; shift # runlevel name
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local services="$*" # names of services
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local svc; for svc in $services; do
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mkdir -p etc/runlevels/$runlevel
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ln -s /etc/init.d/$svc etc/runlevels/$runlevel/$svc
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echo " * service $svc added to runlevel $runlevel"
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done
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}
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# Ensures that the specified device node exists.
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settle_dev_node() {
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local dev="$1"
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[ -e "$dev" ] && return 0
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sleep 1 # give hotplug handler some time to kick in
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[ -e "$dev" ] && return 0
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if has_cmd udevadm; then
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udevadm settle --exit-if-exists="$dev"
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elif has_cmd mdev; then
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mdev -s
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fi
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[ -e "$dev" ] && return 0
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return 1
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}
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# Installs and configures extlinux.
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setup_extlinux() {
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local mnt="$1" # path of directory where is root device currently mounted
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local root_dev="$2" # root device
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local modules="$3" # modules which should be loaded before pivot_root
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local kernel_flavor="$4" # name of default kernel to boot
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local serial_port="$5" # serial port number for serial console
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local default_kernel="$kernel_flavor"
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local kernel_opts=''
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[ -z "$serial_port" ] || kernel_opts="console=$serial_port"
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if [ "$kernel_flavor" = 'virt' ]; then
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_apk search --root . --exact --quiet linux-lts | grep -q . \
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&& default_kernel='lts' \
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|| default_kernel='vanilla'
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fi
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|
sed -Ei \
|
||
|
|
-e "s|^[# ]*(root)=.*|\1=$root_dev|" \
|
||
|
|
-e "s|^[# ]*(default_kernel_opts)=.*|\1=\"$kernel_opts\"|" \
|
||
|
|
-e "s|^[# ]*(modules)=.*|\1=\"$modules\"|" \
|
||
|
|
-e "s|^[# ]*(default)=.*|\1=$default_kernel|" \
|
||
|
|
-e "s|^[# ]*(serial_port)=.*|\1=$serial_port|" \
|
||
|
|
"$mnt"/etc/update-extlinux.conf
|
||
|
|
|
||
|
|
chroot "$mnt" extlinux --install /boot
|
||
|
|
chroot "$mnt" update-extlinux --warn-only 2>&1 \
|
||
|
|
| { grep -Fv 'extlinux: cannot open device /dev' ||:; } >&2
|
||
|
|
}
|
||
|
|
|
||
|
|
# Configures mkinitfs.
|
||
|
|
setup_mkinitfs() {
|
||
|
|
local mnt="$1" # path of directory where is root device currently mounted
|
||
|
|
local features="$2" # list of mkinitfs features
|
||
|
|
|
||
|
|
features=$(printf '%s\n' $features | sort | uniq | xargs)
|
||
|
|
|
||
|
|
sed -Ei "s|^[# ]*(features)=.*|\1=\"$features\"|" \
|
||
|
|
"$mnt"/etc/mkinitfs/mkinitfs.conf
|
||
|
|
}
|
||
|
|
|
||
|
|
# Unmounts all filesystem under the specified directory tree.
|
||
|
|
umount_recursively() {
|
||
|
|
local mount_point="$1"
|
||
|
|
test -n "$mount_point" || return 1
|
||
|
|
|
||
|
|
cat /proc/mounts \
|
||
|
|
| cut -d ' ' -f 2 \
|
||
|
|
| grep "^$mount_point" \
|
||
|
|
| sort -r \
|
||
|
|
| xargs umount -rn
|
||
|
|
}
|
||
|
|
|
||
|
|
# Downloads the specified file using wget and checks checksum.
|
||
|
|
wgets() (
|
||
|
|
local url="$1"
|
||
|
|
local sha256="$2"
|
||
|
|
local dest="${3:-.}"
|
||
|
|
|
||
|
|
cd "$dest" \
|
||
|
|
&& wget -T 10 --no-verbose "$url" \
|
||
|
|
&& echo "$sha256 ${url##*/}" | sha256sum -c
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
#============================= M a i n ==============================#
|
||
|
|
|
||
|
|
opts=$(getopt -n $PROGNAME -o b:cCf:hi:k:m:p:Pr:s:S:tv \
|
||
|
|
-l branch:,fs-skel-chown:,fs-skel-dir:,image-format:,image-size:,initfs-features:,kernel-flavor:,keys-dir:,mirror-uri:,no-cleanup,packages:,partition,repositories-file:,rootfs:,script-chroot,serial-console,help,version \
|
||
|
|
-- "$@") || help 1 >&2
|
||
|
|
|
||
|
|
eval set -- "$opts"
|
||
|
|
while [ $# -gt 0 ]; do
|
||
|
|
n=2
|
||
|
|
case "$1" in
|
||
|
|
-b | --branch) ALPINE_BRANCH="$2";;
|
||
|
|
-S | --fs-skel-dir) FS_SKEL_DIR="$(realpath "$2")";;
|
||
|
|
--fs-skel-chown) FS_SKEL_CHOWN="$2";;
|
||
|
|
-f | --image-format) IMAGE_FORMAT="$2";;
|
||
|
|
-s | --image-size) IMAGE_SIZE="$2";;
|
||
|
|
-i | --initfs-features) INITFS_FEATURES="${INITFS_FEATURES:-} $2";;
|
||
|
|
-k | --kernel-flavor) KERNEL_FLAVOR="$2";;
|
||
|
|
--keys-dir) KEYS_DIR="$(realpath "$2")";;
|
||
|
|
-m | --mirror-uri) ALPINE_MIRROR="$2";;
|
||
|
|
-C | --no-cleanup) CLEANUP='no'; n=1;;
|
||
|
|
-p | --packages) PACKAGES="${PACKAGES:-} $2";;
|
||
|
|
-P | --partition) PARTITION='yes'; n=1;;
|
||
|
|
-r | --repositories-file) REPOS_FILE="$(realpath "$2")";;
|
||
|
|
--rootfs) ROOTFS="$2";;
|
||
|
|
-t | --serial-console) SERIAL_CONSOLE='yes'; n=1;;
|
||
|
|
-c | --script-chroot) SCRIPT_CHROOT='yes'; n=1;;
|
||
|
|
-h | --help) help 0;;
|
||
|
|
-V | --version) echo "$PROGNAME $VERSION"; exit 0;;
|
||
|
|
--) shift; break;;
|
||
|
|
esac
|
||
|
|
shift $n
|
||
|
|
done
|
||
|
|
|
||
|
|
: ${ALPINE_BRANCH:="latest-stable"}
|
||
|
|
: ${ALPINE_MIRROR:="http://dl-cdn.alpinelinux.org/alpine"}
|
||
|
|
: ${CLEANUP:="yes"}
|
||
|
|
: ${FS_SKEL_CHOWN:=}
|
||
|
|
: ${FS_SKEL_DIR:=}
|
||
|
|
: ${IMAGE_FORMAT:=}
|
||
|
|
: ${IMAGE_SIZE:="2G"}
|
||
|
|
: ${INITFS_FEATURES:="scsi virtio"}
|
||
|
|
: ${KERNEL_FLAVOR:="virt"}
|
||
|
|
: ${KEYS_DIR:="/etc/apk/keys"}
|
||
|
|
: ${PACKAGES:=}
|
||
|
|
: ${PARTITION:="no"}
|
||
|
|
: ${REPOS_FILE:=}
|
||
|
|
: ${ROOTFS:="ext4"}
|
||
|
|
: ${SCRIPT_CHROOT:="no"}
|
||
|
|
: ${SERIAL_CONSOLE:="no"}
|
||
|
|
|
||
|
|
case "$ALPINE_BRANCH" in
|
||
|
|
[0-9]*) ALPINE_BRANCH="v$ALPINE_BRANCH";;
|
||
|
|
esac
|
||
|
|
|
||
|
|
if [ -f /etc/alpine-release ]; then
|
||
|
|
: ${INSTALL_HOST_PKGS:="yes"}
|
||
|
|
else
|
||
|
|
: ${INSTALL_HOST_PKGS:="no"}
|
||
|
|
fi
|
||
|
|
|
||
|
|
SERIAL_PORT=
|
||
|
|
[ "$SERIAL_CONSOLE" = 'no' ] || SERIAL_PORT='ttyS0'
|
||
|
|
|
||
|
|
[ $# -ne 0 ] || help 1 >&2
|
||
|
|
|
||
|
|
IMAGE_FILE="$1"; shift
|
||
|
|
SCRIPT=
|
||
|
|
[ $# -eq 0 ] || { SCRIPT=$(realpath "$1"); shift; }
|
||
|
|
|
||
|
|
[ "$CLEANUP" = no ] || trap cleanup EXIT HUP INT TERM
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ "$INSTALL_HOST_PKGS" = yes ]; then
|
||
|
|
einfo 'Installing needed packages on host system'
|
||
|
|
|
||
|
|
# We need load btrfs module to avoid the error message:
|
||
|
|
# 'failed to open /dev/btrfs-control'
|
||
|
|
if ! grep -q -w "$ROOTFS" /proc/filesystems; then
|
||
|
|
modprobe $ROOTFS
|
||
|
|
fi
|
||
|
|
_apk add -t $VIRTUAL_PKG qemu-img $(fs_progs_pkg "$ROOTFS") rsync sfdisk
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
temp_dir=''
|
||
|
|
if ! command -v "$APK" >/dev/null; then
|
||
|
|
einfo "$APK not found, downloading static apk-tools"
|
||
|
|
|
||
|
|
temp_dir="$(mktemp -d /tmp/$PROGNAME.XXXXXX)"
|
||
|
|
wgets "$APK_TOOLS_URI" "$APK_TOOLS_SHA256" "$temp_dir"
|
||
|
|
APK="$temp_dir/apk.static"
|
||
|
|
chmod +x "$APK"
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ ! -f "$IMAGE_FILE" ]; then
|
||
|
|
einfo "Creating $IMAGE_FORMAT image of size $IMAGE_SIZE"
|
||
|
|
qemu-img create ${IMAGE_FORMAT:+-f $IMAGE_FORMAT} "$IMAGE_FILE" "$IMAGE_SIZE"
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo "Attaching image $IMAGE_FILE as a NBD device"
|
||
|
|
|
||
|
|
nbd_dev=$(attach_image "$IMAGE_FILE" "$IMAGE_FORMAT")
|
||
|
|
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ "$PARTITION" = yes ]; then
|
||
|
|
einfo 'Creating GPT partition table'
|
||
|
|
|
||
|
|
printf '%s\n' \
|
||
|
|
'label: gpt' \
|
||
|
|
'name=system,type=L,bootable,attrs=LegacyBIOSBootable' \
|
||
|
|
| sfdisk "$nbd_dev"
|
||
|
|
root_dev="${nbd_dev}p1"
|
||
|
|
# This is needed when running in a container.
|
||
|
|
settle_dev_node "$root_dev" || die "system didn't create $root_dev node"
|
||
|
|
else
|
||
|
|
root_dev="$nbd_dev"
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo "Formatting image to $ROOTFS"
|
||
|
|
|
||
|
|
# syslinux 6.0.3 cannot boot from ext4 w/ 64bit feature enabled.
|
||
|
|
# -E nodiscard / -K - do not attempt to discard blocks at mkfs time (it's
|
||
|
|
# useless for NBD image and prints confusing error).
|
||
|
|
[ "$ROOTFS" = ext4 ] && mkfs_args='-O ^64bit -E nodiscard' || mkfs_args='-K'
|
||
|
|
|
||
|
|
mkfs.$ROOTFS -L root $mkfs_args "$root_dev"
|
||
|
|
|
||
|
|
root_uuid=$(blk_uuid "$root_dev")
|
||
|
|
mount_dir=$(mktemp -d /tmp/$PROGNAME.XXXXXX)
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo "Mounting image at $mount_dir"
|
||
|
|
|
||
|
|
mount "$root_dev" "$mount_dir"
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo 'Installing base system'
|
||
|
|
|
||
|
|
cd "$mount_dir"
|
||
|
|
|
||
|
|
mkdir -p etc/apk/keys
|
||
|
|
if [ "$REPOS_FILE" ]; then
|
||
|
|
install -m 644 "$REPOS_FILE" etc/apk/repositories
|
||
|
|
else
|
||
|
|
cat > etc/apk/repositories <<-EOF
|
||
|
|
$ALPINE_MIRROR/$ALPINE_BRANCH/main
|
||
|
|
$ALPINE_MIRROR/$ALPINE_BRANCH/community
|
||
|
|
EOF
|
||
|
|
fi
|
||
|
|
if [ -d "$KEYS_DIR" ]; then
|
||
|
|
cp "$KEYS_DIR"/* etc/apk/keys/
|
||
|
|
else
|
||
|
|
dump_alpine_keys etc/apk/keys/
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Use APK cache if available.
|
||
|
|
if [ -L /etc/apk/cache ]; then
|
||
|
|
ln -s "$(realpath /etc/apk/cache)" etc/apk/cache
|
||
|
|
fi
|
||
|
|
|
||
|
|
_apk add --root . --update-cache --initdb alpine-base
|
||
|
|
prepare_chroot .
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo "Installing and configuring mkinitfs"
|
||
|
|
|
||
|
|
_apk add --root . mkinitfs
|
||
|
|
setup_mkinitfs . "base $ROOTFS $INITFS_FEATURES"
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo "Installing kernel linux-$KERNEL_FLAVOR"
|
||
|
|
|
||
|
|
if [ "$KERNEL_FLAVOR" = 'virt' ]; then
|
||
|
|
_apk add --root . linux-$KERNEL_FLAVOR
|
||
|
|
else
|
||
|
|
# Avoid installing *all* linux-firmware-* packages (see #21).
|
||
|
|
_apk add --root . linux-$KERNEL_FLAVOR linux-firmware-none
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo 'Setting up extlinux bootloader'
|
||
|
|
|
||
|
|
_apk add --root . --no-scripts syslinux
|
||
|
|
setup_extlinux . "UUID=$root_uuid" "$ROOTFS" "$KERNEL_FLAVOR" "$SERIAL_PORT"
|
||
|
|
|
||
|
|
if [ "$PARTITION" = yes ]; then
|
||
|
|
dd bs=440 count=1 conv=notrunc if=usr/share/syslinux/gptmbr.bin of="$nbd_dev"
|
||
|
|
sync
|
||
|
|
fi
|
||
|
|
|
||
|
|
cat > etc/fstab <<-EOF
|
||
|
|
# <fs> <mountpoint> <type> <opts> <dump/pass>
|
||
|
|
UUID=$root_uuid / $ROOTFS noatime 0 1
|
||
|
|
EOF
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo 'Configuring system'
|
||
|
|
|
||
|
|
# We just prepare this config, but don't start the networking service.
|
||
|
|
cat > etc/network/interfaces <<-EOF
|
||
|
|
iface lo inet loopback
|
||
|
|
|
||
|
|
iface eth0 inet dhcp
|
||
|
|
|
||
|
|
post-up /etc/network/if-post-up.d/*
|
||
|
|
post-down /etc/network/if-post-down.d/*
|
||
|
|
EOF
|
||
|
|
|
||
|
|
if [ "$SERIAL_PORT" ]; then
|
||
|
|
echo "$SERIAL_PORT" >> etc/securetty
|
||
|
|
sed -Ei "s|^[# ]*($SERIAL_PORT:.*)|\1|" etc/inittab
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
einfo 'Enabling base system services'
|
||
|
|
|
||
|
|
rc_add sysinit devfs dmesg mdev hwdrivers
|
||
|
|
[ -e etc/init.d/cgroups ] && rc_add sysinit cgroups ||: # since v3.8
|
||
|
|
|
||
|
|
rc_add boot modules hwclock swap hostname sysctl bootmisc syslog
|
||
|
|
rc_add shutdown killprocs savecache mount-ro
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ "$PACKAGES" ]; then
|
||
|
|
einfo 'Installing additional packages'
|
||
|
|
_apk add --root . $PACKAGES
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ -L /etc/apk/cache ]; then
|
||
|
|
rm etc/apk/cache >/dev/null 2>&1
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ "$FS_SKEL_DIR" ]; then
|
||
|
|
einfo "Copying content of $FS_SKEL_DIR into image"
|
||
|
|
|
||
|
|
[ "$FS_SKEL_CHOWN" ] \
|
||
|
|
&& rsync_opts="--chown $FS_SKEL_CHOWN" \
|
||
|
|
|| rsync_opts='--numeric-ids'
|
||
|
|
rsync --archive --info=NAME2 --whole-file $rsync_opts "$FS_SKEL_DIR"/ . >&2
|
||
|
|
|
||
|
|
# rsync may modify perms of the rootfs dir itself, so make sure it's correct.
|
||
|
|
install -d -m 0755 -o root -g root .
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if [ "$SCRIPT" ]; then
|
||
|
|
script_name="${SCRIPT##*/}"
|
||
|
|
|
||
|
|
if [ "$SCRIPT_CHROOT" = 'no' ]; then
|
||
|
|
einfo "Executing script: $script_name $*"
|
||
|
|
"$SCRIPT" "$@" || die 'Script failed'
|
||
|
|
else
|
||
|
|
einfo "Executing script in chroot: $script_name $*"
|
||
|
|
mount_bind "${SCRIPT%/*}" mnt/
|
||
|
|
chroot . /bin/sh -c "cd /mnt && ./$script_name \"\$@\"" -- "$@" \
|
||
|
|
|| die 'Script failed'
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
#-----------------------------------------------------------------------
|
||
|
|
if grep -qw "$RESOLVCONF_MARK" etc/resolv.conf 2>/dev/null; then
|
||
|
|
cat > etc/resolv.conf <<-EOF
|
||
|
|
# Default nameservers, replace them with your own.
|
||
|
|
nameserver 1.1.1.1
|
||
|
|
nameserver 2606:4700:4700::1111
|
||
|
|
EOF
|
||
|
|
fi
|
||
|
|
|
||
|
|
rm -Rf var/cache/apk/* ||:
|
||
|
|
|
||
|
|
einfo 'Completed'
|
||
|
|
|
||
|
|
cd - >/dev/null
|
||
|
|
ls -lh "$IMAGE_FILE"
|