A script for running (and listing) virtual machine images with kvm/qemu

vm

#!/bin/bash

DEFAULT_RAM=768;
SNAPSHOT="";
VGA="std";
VMDIR="${HOME}/vm";
VM="qemu-kvm";
#AUDIO_DRV="sdl"
AUDIO_DRV="pa"
RAM=$DEFAULT_RAM;
TABLET=" -usbdevice tablet ";
NOQUIT=" -no-quit ";


while getopts "qsv:nm:rl" optname; do
    case "$optname" in
    "s")
        NOQUIT="";
        SNAPSHOT=",snapshot=on";;
    "m")
        RAM=$OPTARG;;
    "n")
	NET="-net nic,model=ne2k_pci -net tap,script=/etc/qemu-ifup";;
    "v")
        VGA=$OPTARG;;
    "q")
        VM="qemu";;
    "r")
#        TABLET="";
        REMOTE=1;
#        VGA="none";
        MOREOPTS="$MOREOPTS -redir tcp:3389::3389 ";;
    "l")
        MOREOPTS="$MOREOPTS -loadvm default";;
    *)
        echo "Unknown error while processing options" # Should not occur
        exit;;
    esac
done
shift `expr $OPTIND - 1`

if [ $# -eq 0 ]; then
    echo "Usage:";
    echo " `echo $0 | sed 's/.*\///'` [-s] [-v] [-m <num>]  image [<extra_opts>]";
    echo "  Options:";
    echo "      -s            Run in snapshot mode. This will prevent any changes to the first virtual drive from being written to disk.";
    echo "      -v [std|cirrus|vmware|none] Emulate a particular VGA card. Defaults to std."
    echo "      -m <num>      The number of megabytes of ram to allocate to the virtual machine. Defaults to $DEFAULT_RAM."
    echo "      -n            Connects the vm to a tap device for a real network address."
    echo "      -r            Set up port forwarding to allow remote desktop connections to a windows guest (10.0.2.15)";
    echo "      -q            Use the qemu executable instead of $VM. This is necessary for some guest operating systems.";
    echo "      <extra_opts>  Extra options to be passed to $VM; view the qemu man page for more details";
    echo;
    echo "The following virtual machine images are available:";
    ls $VMDIR | grep -E "\.img$|\.vmdk$|\.qcow2$" | sed -e "s/\.img$//" -e "s/\.vmdk$//" -e "s/\.qcow2$//" -e "s/^/   /";
    exit;
fi

img=''

if [ -r $VMDIR/$1.img ]; then
	img=$1.img;
fi;

if [ -r $VMDIR/$1.vmdk ]; then
	img=$1.vmdk;
fi;

if [ -r $VMDIR/$1.qcow2 ]; then
	img=$1.qcow2;
fi;

if [ -d $VMDIR/$img ]; then
	echo "Virtual Machine image '$1' not found"
	exit;
fi;

if [ -r $VMDIR/storage.img -a ! -r $VMDIR/storage.lock ]; then
	STORAGE="-drive file=$VMDIR/storage.img,media=disk,index=1"
	touch $VMDIR/storage.lock
fi;

echo "Launching virtual machine '$1' ...";
shift

QEMU_AUDIO_DRV=$AUDIO_DRV $VM $NOQUIT -vga $VGA -usb $TABLET -m $RAM -soundhw es1370 $NET -localtime $MOREOPTS -drive file=$VMDIR/$img,media=disk,index=0$SNAPSHOT $STORAGE $* 2>>/tmp/vm.log

if [ "$STORAGE" ]; then
	rm $VMDIR/storage.lock;
fi;