#!/bin/bash
appdir=$(cd `dirname $0` && pwd)
apptmp='/tmp'
vmsize='8G'
vmmem='2G'
vcpu=`cat /proc/cpuinfo|grep proc|tail -1|awk '{print $NF}'`
k8sdsk="${apptmp}/k8s-demo.raw"
httpboot='http://ftp.debian.org/debian/dists/stretch/main/installer-amd64/current/images/netboot/debian-installer/amd64'
seed='https://git.ix.gs/public/coins-demo/raw/branch/master/contrib/k8s-seed.txt'
qemu="${appdir}/contrib/qemu-system-x86_64 -L ${appdir}/contrib/share/qemu -net nic -net user -m ${vmmem} -smp ${vcpu} -localtime -enable-kvm -cpu host,+nx -M pc  -vga std -usbdevice tablet -k en-us -hda ${k8sdsk} -boot once=d -nographic"
###
installvm() {
    fallocate -l ${vmsize} ${k8sdsk}
    echo "Preparing K8S VM..."
    wget -cO ${apptmp}/kernel ${httpboot}/linux 
    wget -cO ${apptmp}/initrd ${httpboot}/initrd.gz
    ${qemu} -kernel ${apptmp}/kernel -initrd ${apptmp}/initrd -append "console=ttyS0,115200n8 apt-setup/proposed=true nomodeset fb=false priority=critical locale=en_US url=${seed}" 
    rm -f ${apptmp}/kernel ${apptmp}/initrd
}
runvm() {
    echo "Look like we already has VM, let's go"
    ${qemu}
}
###
if [ ! -f "${k8sdsk}" ]; then
    installvm && runvm;
else
    runvm;
fi