updated vm_run script to specifiy qcow or iso images and to boot first to cdrom if present

tools/template_creator/vm_run

@@ -3,18 +3,54 @@
 CPUS=4
 RAM=4G
 
+APP=`basename $0`
+
 function echoerr {
     echo "$@" >&2
 }
 
-if [ $# -ne 1 ]; then
-    appname=`basename $0`
-	echoerr "$appname - launch a QEMU VM on the specified disk image."
-	echoerr "The VM uses $CPUS CPUs and $RAM of RAM."
+function usage {
+	echoerr "$APP - launch a VM on the specified disk image(s)."
+	echoerr "The VM is configured with $CPUS CPUs and $RAM of RAM."
     echoerr ""
-    echoerr "Usage: $appname disk"
+    echoerr "Usage: $APP -d disk -c iso"
     echoerr "disk    the disk image to use (typically a .qcow file)"
+    echoerr "iso     the CD/DVD-ROM image to use (typically an .iso file)"
+    echoerr ""
+    echoerr "At least one image must be specified."
     exit 1
+}
+
+if [ $# -lt 1 ]; then
+    usage
+fi
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    -d)
+      disk="$2"
+      shift # past argument
+      shift # past value
+      ;;
+    -c)
+      iso="$2"
+      shift # past argument
+      shift # past value
+      ;;
+    *)
+      echo "Unknown argument $1"
+      exit 1
+      ;;
+  esac
+done
+
+if [ ! -z $disk ]; then
+    disk_drive="-drive file=$disk,index=0,media=disk,format=qcow2,if=virtio"
+fi
+
+if [ ! -z $iso ]; then
+    cdrom_drive="-drive file=$iso,index=1,media=cdrom,format=raw,read-only=on"
 fi
 
-qemu-system-x86_64 -enable-kvm -cpu host -smp cpus=$CPUS -m $RAM -drive file=$1,index=0,media=disk,format=qcow2,if=virtio -vga virtio -device virtio-serial-pci -nic user,model=virtio-net-pci
+# -boot order=d tells QEMU to boot to CDROM first
+qemu-system-x86_64 -enable-kvm -cpu host -smp cpus=$CPUS -m $RAM -boot order=d $disk_drive $cdrom_drive -vga virtio -device virtio-serial-pci -nic user,model=virtio-net-pci