add yamls and mods to accept various images

scripts/start

@@ -1,11 +1,12 @@
 #!/usr/bin/env bash
 set -eox pipefail
 
-VM_NAME="${VM_NAME:-coreos-kvm}"
+VM_NAME="${VM_NAME:-k8s-kvm}"
 VM_MEMORY="${VM_MEMORY:-4G}"
-VM_DISK_SIZE="${VM_DISK_SIZE:-12G}"
 # hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport
 HOSTFWD="${HOSTFWD:-hostfwd=tcp::2222-:22}"
+DISK_IMG="${DISK_IMG:-./coreos_production_qemu_image.img}"
+CD_ARG=""
 
 if [ -n "${CLOUD_CONFIG_FILE}" ]; then
   echo "Setting cloud config file: ${CLOUD_CONFIG_FILE}"
@@ -32,7 +33,9 @@ if [ -n "$CONFIG_FILE" ]; then
   set -- -fw_cfg name=opt/com.coreos/config,file="${PWD}/ignition.json" "$@"
 fi
 
-qemu-img resize ./coreos_production_qemu_image.img "${VM_DISK_SIZE}"
+if [ -n "$CD_IMG" ]; then
+  CD_ARG="-drive file=${CD_IMG},media=cdrom"
+fi
 
 # https://alpha.release.core-os.net/amd64-usr/current/coreos_production_qemu.sh
 qemu-system-x86_64 \
@@ -40,10 +43,12 @@ qemu-system-x86_64 \
   -enable-kvm \
   -cpu host \
   -m "${VM_MEMORY}" \
-  -net nic,model=virtio \
-  -net user,"${HOSTFWD}",hostname="${VM_NAME}" \
-  -drive if=virtio,file=./coreos_production_qemu_image.img \
+  -device virtio-net,netdev=vmnic \
+  -netdev user,id=vmnic,"${HOSTFWD}",hostname="${VM_NAME}" \
+  -drive if=virtio,file="${DISK_IMG}" \
+  ${CD_ARG} \
   -nographic \
   -machine accel=kvm \
+  -vga std \
   -smp 2 \
-  "$@"
+  $@