Initial import

.gitignore

+/image.sqfs
+/initramfs-virt
+/vmlinuz-virt
+/apk-cache

Makefile

+image.sqfs:
+	podman run --rm -ti -v $$PWD:/build -w /build alpine:3.17 ./make-image.sh
+
+.PHONY: image.sqfs

launch.sh

+#!/bin/sh
+set -e
+set -x
+exec qemu-system-x86_64 \
+	-M microvm,x-option-roms=off,pit=off,pic=off,rtc=off,isa-serial=off,pcie=on \
+	-bios /usr/share/qemu/qboot.rom \
+	-enable-kvm \
+	-cpu host \
+	-m 1536M \
+	-nodefaults \
+	-no-user-config \
+	-nographic \
+	-device virtio-balloon-device \
+	-device virtio-rng-device \
+	-drive id=root,file=image.sqfs,format=raw,if=none \
+	-device virtio-blk-device,drive=root \
+	-kernel vmlinuz-virt \
+	-initrd initramfs-virt \
+	-append "root=/dev/vda overlaytmpfs console=hvc0 earlyprintk=hvc0" \
+	-chardev stdio,mux=on,id=stdio \
+	-device virtio-serial-device \
+	-device virtconsole,chardev=stdio,name=console.0 \
+	-mon chardev=stdio,mode=readline \
+	-netdev user,id=net \
+	-device virtio-net-device,netdev=net \
+	-chardev socket,path=qga,server=on,wait=off,id=qga \
+	-device virtserialport,chardev=qga,name=org.qemu.guest_agent.0 \
+	-chardev socket,id=virtfs,path=/tmp/virtfs.sock \
+	-device vhost-user-fs-pci,chardev=virtfs,tag=virtfs,queue-size=1024 \
+	-object memory-backend-memfd,id=mem,size=1536M,share=on \
+	-numa node,memdev=mem

make-image.sh

+#!/bin/sh
+
+if test x"$container" != xpodman; then
+	echo This script is supposed to be run inside the container. >&2
+	exit 1
+fi
+set -e
+set -x
+
+mkdir -p /image/etc/apk
+mkdir -p apk-cache
+ln -s "$PWD/apk-cache" /etc/apk/cache
+ln -s "$PWD/apk-cache" /image/etc/apk/cache
+cp -r /etc/apk/repositories /etc/apk/keys /image/etc/apk
+apk add --root /image --update-cache --initdb alpine-base mkinitfs \
+	qemu-guest-agent git git-lfs gitlab-runner bash buildah
+echo 'features="base squashfs virtio"' > /image/etc/mkinitfs/mkinitfs.conf
+apk add --root /image linux-virt
+
+oldpwd="$PWD"
+cd /image/etc/runlevels
+for i in devfs dmesg mdev hwdrivers cgroups; do
+	ln -s /etc/init.d/$i sysinit/$i
+done
+for i in modules hostname sysctl bootmisc syslog osclock networking; do
+	ln -s /etc/init.d/$i boot/$i
+done
+ln -s /etc/init.d/killprocs shutdown/killprocs
+for i in qemu-guest-agent; do
+	ln -s /etc/init.d/$i default/$i
+done
+cd "$oldpwd"
+
+echo hvc0::respawn:/sbin/getty 115200 hvc0 >> /image/etc/inittab
+cat <<EOF >/image/etc/network/interfaces
+auto lo
+iface lo inet loopback
+
+auto eth0
+iface eth0 inet dhcp
+EOF
+
+find /image/var/cache/apk -name APKINDEX.\* -delete
+rm -f /image/etc/apk/cache
+mv /image/boot/vmlinuz-virt /image/boot/initramfs-virt .
+apk add squashfs-tools
+rm -f image.sqfs
+mksquashfs /image/ image.sqfs