Test a bootable tarball with cloud-hypervisor

debug-image.sh

#!env bash

socket="/tmp/virtiofs.sock"

# override this as well if u wanna change
# the vm entry point
init=/sbin/init

# pass to extracted tarball
dir=$1
kernel=$dir/boot/vmlinuz
initram=$dir/boot/initrd.img

fail() {
    echo $1 >&2
    exit 1
}

which virtiofsd-rs &>/dev/null || fail "virtiofsd-rs not found in PATH"
which cloud-hypervisor &>/dev/null || fail "cloud-hypervior not found in path"

if [ ! -f "${kernel}" ]; then
    fail "kernel file not found"
fi

if [ ! -f "${initram}" ]; then
    fail "kernel file not found"
fi

# start virtiofsd-rs in the background
sudo virtiofsd-rs --socket-path=/tmp/virtiofs.sock --shared-dir=$dir &
fspid=$!

cleanup() {
    kill $fspid &>/dev/null || true
}

trap cleanup EXIT

sudo cloud-hypervisor \
    --memory size=1024M,shared=on \
    --kernel ${kernel} \
    --initramfs ${initram} \
    --fs tag=vroot,socket=${socket} \
    --cmdline "rw console=ttyS0 reboot=k panic=1 root=vroot rootfstype=virtiofs rootdelay=30 init=${init}" \
    --serial tty \
    --console off