From e9ab7fc9d95c426920c3ef5d32be23e2d6404fef Mon Sep 17 00:00:00 2001
From: mustard <sussybaka@homelab0ne.xyz>
Date: Tue, 12 Aug 2025 01:50:42 +0200
Subject: [PATCH] feat: added helper scripts

---
 create.sh                |  7 +++++++
 extract-kernel-initrd.sh | 15 +++++++++++++++
 init.sh                  |  3 +++
 notes.txt                |  9 +++++++++
 prepare-rootfs.sh        | 15 +++++++++++++++
 5 files changed, 49 insertions(+)
 create mode 100755 create.sh
 create mode 100755 extract-kernel-initrd.sh
 create mode 100755 init.sh
 create mode 100644 notes.txt
 create mode 100755 prepare-rootfs.sh

diff --git a/create.sh b/create.sh
new file mode 100755
index 0000000..0224658
--- /dev/null
+++ b/create.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+rm ./rootfs.qcow2
+rm -rf ./rootfs
+mkdir ./rootfs
+tar -xf ./jammy-server-cloudimg-amd64-root.tar.xz -C ./rootfs 
+virt-make-fs --format=qcow2 --size=2000M only rootfs.qcow2
diff --git a/extract-kernel-initrd.sh b/extract-kernel-initrd.sh
new file mode 100755
index 0000000..a5f4f6d
--- /dev/null
+++ b/extract-kernel-initrd.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+
+qemu-nbd /dev/nbd0 --disconnect
+sleep 0.5
+umount ./files/mnt
+sleep 0.5
+rm -rf ./files/mnt && mkdir ./files/mnt
+sleep 0.5
+rmmod nbd
+modprobe nbd max_part=8
+qemu-nbd --connect=/dev/nbd0 ./files/jammy-server-cloudimg-amd64-disk-kvm.img && sleep 1 && mount /dev/nbd0p1 ./files/mnt/
+
+cp ./files/mnt/boot/initrd.img-*-kvm ./initrd.img
+cp ./files/mnt/boot/vmlinuz-*-kvm ./vmlinuz-kvm
diff --git a/init.sh b/init.sh
new file mode 100755
index 0000000..7c94620
--- /dev/null
+++ b/init.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+qemu-system-x86_64 -m 4096M -M microvm -enable-kvm -cpu host     -kernel vmlinuz-kvm  -initrd initrd.img     -append 'console=ttyS0 root=/dev/vda rw fsck.mode=skip nomodeset reboot=t init=/usr/sbin/init' -no-reboot     -nodefaults -no-user-config     -display none -serial mon:stdio     -drive file=rootfs.qcow2,index=0,format=qcow2,media=disk,if=none,id=virtio1     -device virtio-blk-device,drive=virtio1 -netdev tap,id=tap0,script=no,downscript=no   -device virtio-net-device,netdev=tap0
diff --git a/notes.txt b/notes.txt
new file mode 100644
index 0000000..7ec0dfc
--- /dev/null
+++ b/notes.txt
@@ -0,0 +1,9 @@
+# Stuff to change:
+
+/etc/shadow for root password
+
+extract kernel, initrd and pass as arguments
+
+edit /etc/fstab to mount /dev/vda
+
+disable snap, multipath services
diff --git a/prepare-rootfs.sh b/prepare-rootfs.sh
new file mode 100755
index 0000000..1502e3a
--- /dev/null
+++ b/prepare-rootfs.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+
+tar -xf ./files/jammy-server-cloudimg-amd64-root.tar.xz -C ./files/rootfs
+sed -i "1 s,^.*$,root:\$y\$j9T\$4Sr0RCDCWboukd7UCeeWvIyH\$5bE15871.Uyzk77tFoYZqmPqOUosbB0MFWkKGq2/KI2::0:99999:7:::," ./files/rootfs/etc/shadow # password is amogus
+
+echo "/dev/vda	/	 ext4	discard,errors=remount-ro	0 1" > ./files/rootfs/etc/fstab
+echo "TimeoutStartSec=1" >> ./files/rootfs/lib/systemd/system/snapd.seeded.service
+rm ./files/rootfs/etc/systemd/system/multipath-tools.service
+rm ./files/rootfs/lib/systemd/system/multipathd.service
+
+# rm -f ./files/rootfs/etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service 
+ln -sf ./files/rootfs/dev/null ./files/rootfs/etc/systemd/system/systemd-networkd-wait-online.service  
+
+virt-make-fs --format=qcow2 --size=2000M ./files/rootfs rootfs.qcow2