initial commit

2025-02-03 00:31:56 +01:00 · 2025-02-03 00:31:56 +01:00 · 9a7be39f04
commit 9a7be39f04
2 changed files with 175 additions and 0 deletions
--- a/7
+++ b/7
@ -0,0 +1,7 @@
+BOOTSTRAP_HOSTNAME=mx2.freepinc.dev
+BOOTSTRAP_ROOTFS=/dev/vg/mx2-rootfs
+BOOTSTRAP_IFNAME=eth0
+BOOTSTRAP_IFADDR=192.168.254.25
+BOOTSTRAP_IFGW=192.168.254.1
+BOOTSTRAP_DNS=192.168.254.1
+BOOTSTRAP_ALPINE_VERSION=3.19
--- a/run.sh
+++ b/run.sh
@ -0,0 +1,168 @@
+#!/usr/bin/bash
+
+# needed configuration values
+# BOOTSTRAP_HOSTNAME=
+# BOOTSTRAP_ROOTFS=
+# BOOTSTRAP_IFNAME=
+# BOOTSTRAP_IFADDR=
+# BOOTSTRAP_IFGW=
+# BOOTSTRAP_DNS=
+# BOOTSTRAP_ALPINE_VERSION=
+
+# Must be root
+notroot() {
+    echo "You must be root to run this script"
+    exit 1
+}
+[ `id -u` -eq 0 ] || notroot
+
+# Set the variable in the environment or give a file defining them as an argument
+if [ $# -ge 1 ];
+then
+    source $1
+fi
+
+echo "Starting to bootstrap an Alpine Linux OS with the following configuration:"
+echo BOOTSTRAP_HOSTNAME=$BOOTSTRAP_HOSTNAME
+echo BOOTSTRAP_ROOTFS=$BOOTSTRAP_ROOTFS
+echo BOOTSTRAP_IFNAME=$BOOTSTRAP_IFNAME
+echo BOOTSTRAP_IFADDR=$BOOTSTRAP_IFADDR
+echo BOOTSTRAP_IFGW=$BOOTSTRAP_IFGW
+echo BOOTSTRAP_DNS=$BOOTSTRAP_DNS
+echo BOOTSTRAP_ALPINE_VERSION=$BOOTSTRAP_ALPINE_VERSION
+
+echo "confirm (y/n)"
+read confirm
+
+[ "$confirm" != "y" ] && exit 0
+
+APK_BINARY=
+TARGET_MNT=`mktemp -d`
+
+error_mount() {
+    echo "Cannot mount $BOOTSTRAP_ROOTFS to $TARGET_MNT"
+    exit 1
+}
+mount_rootfs() {
+     mount -t ext4 $BOOTSTRAP_ROOTFS $TARGET_MNT || error_mount
+}
+
+error_download_apk() {
+    echo "Cannot download apk binary file"
+    exit 1
+}
+download_apk() {
+    APK_BINARY=`mktemp` 
+    curl https://gitlab.alpinelinux.org/api/v4/projects/5/packages/generic/v2.14.6/x86_64/apk.static > $APK_BINARY || error_download_apk
+    chmod +x $APK_BINARY
+}
+
+error_bootstrap() {
+    echo "Cannot bootstrap alpine"
+    exit 1
+}
+bootstrap() {
+    REPO=https://dl-cdn.alpinelinux.org/alpine/v$BOOTSTRAP_ALPINE_VERSION/main/
+    $APK_BINARY --arch x86_64 \
+        -X $REPO \
+        -U --allow-untrusted --initdb \
+        --root $TARGET_MNT \
+        add alpine-base agetty || error_bootstrap
+}
+
+genfstab() {
+    echo "UUID=`blkid -s UUID -o value $BOOTSTRAP_ROOTFS`   /   ext4 defaults,errors=remount-ro,discard,noatime  0   1"
+}
+
+# geninittab() {
+# }
+
+geninterfaces() {
+    cat << EOF
+auto lo
+iface lo inet loopback
+
+auto $BOOTSTRAP_IFNAME
+iface $BOOTSTRAP_IFNAME inet static
+    address $BOOTSTRAP_IFADDR
+    gateway $BOOTSTRAP_IFGW
+EOF
+}
+
+genresolvconf() {
+    cat << EOF
+nameserver $BOOTSTRAP_DNS
+search `echo $BOOTSTRAP_HOSTNAME|cut -d. -f2-`
+EOF
+}
+
+genapkrepo() {
+    cat << EOF
+https://dl-cdn.alpinelinux.org/alpine/v$BOOTSTRAP_ALPINE_VERSION/main
+https://dl-cdn.alpinelinux.org/alpine/v$BOOTSTRAP_ALPINE_VERSION/community
+EOF
+}
+
+chrooting() {
+    for dir in /proc /sys /dev;
+    do
+        mount -o bind $dir $TARGET_MNT$dir
+    done
+}
+
+unchroot() {
+    for dir in /proc /sys /dev;
+    do
+        umount $TARGET_MNT$dir
+    done
+}
+
+exit_clean() {
+    unchroot
+    umount $TARGET_MNT
+    rmdir $TARGET_MNT
+    rm $APK_BINARY
+}
+
+echo "Installing"
+
+mount_rootfs
+
+[ ! -x "$APK_BINARY" ] && download_apk
+
+bootstrap
+echo $BOOTSTRAP_HOSTNAME > $TARGET_MNT/etc/hostname
+genfstab > $TARGET_MNT/etc/ftsab
+# geninittab > $TARGET_MNT/etc/inittab
+geninterfaces > $TARGET_MNT/etc/network/interfacces
+genresolvconf > $TARGET_MNT/etc/resolv.conf
+genapkrepo > $TARGET_MNT/etc/apk/repositories
+chrooting
+
+CHROOT_CMD="chroot $TARGET_MNT"
+(
+PATH=/sbin:/bin:/usr/sbin:/usr/bin 
+
+# Install packages
+$CHROOT_CMD apk update
+$CHROOT_CMD apk add linux-virt linux-firmware-none acpi mkinitfs vim screen qemu-guest-agent openssh-server
+
+# Enable services
+for svc in seedrng swap networking modules hostname hwclock bootmisc;
+do
+    $CHROOT_CMD rc-update add $svc boot;
+done;
+for svc in acpid crond qemu-guest-agent sshd;
+do
+    $CHROOT_CMD rc-update add $svc default;
+done;
+for svc in devfs dmesg mdev hwdrivers;
+do
+    $CHROOT_CMD rc-update add $svc sysinit;
+done;
+for svc in killprocs mount-ro savecache;
+do
+    $CHROOT_CMD rc-update add $svc shutdown;
+done;
+)
+exit_clean