Proxmox VM Backup ./mount_vm.sh <VMID> ./umount_vm.sh <VMID>

mount_vm.sh

#! /bin/sh

if [ $# -eq 0 ]
then
	echo "No arguments supplied"
	exit 1
fi


if [ -z "$1" ]
then
	echo "No arguments supplied"
	exit 2
else
	if [ "$1" -lt 100 ];then
		echo "VMID must be greater than 100"
		exit 3
	fi
fi


if [ -z "$2" ]
then
	# Default partition id = 1
	PARTID=1
else
	if [ "$2" -gt 0 ];then
		PARTID=$2
	else
		echo "Wrong partition number"
		exit 4
	fi
fi

VMID=$1
IMG="/var/lib/vz/images/$VMID/vm-$VMID-disk-1.raw"
MOUNTPOINT="/mnt/$VMID"

if [ -f $IMG ]
then
	echo "Image file: $IMG"
else
	echo "File doesn't exist: $IMG"
	echo "Are you sure that VM $VMID has a KVM raw file?"
	exit 5
fi

if mountpoint -q "$MOUNTPOINT"
then
	echo "File already mounted!"
	exit 6
fi


# Available loopback device:
LOOPDEV=`losetup -f`

echo "Loop device: $LOOPDEV"

# Associate loopback with our VM image
losetup $LOOPDEV $IMG

echo "Device $LOOPDEV mapped to the VM image"

echo "Create partition devices:"
kpartx -av $LOOPDEV

PART="/dev/mapper/"`kpartx -l "$LOOPDEV"|sed -n ''$PARTID'p'|awk -F: '{ print $1 }'`
if [ -r $PART ]
then
	echo "Mounting partition $PARTID: $PART"
	if [ -d /mnt/$VMID ]
	then
		mount -r $PART $MOUNTPOINT
		echo "$MOUNTPOINT mounted!"
	else
		echo "Mountpoint doesn't exist: $MOUNTPOINT"
		kpartx -dv $LOOPDEV
		sleep 1
		losetup	-d $LOOPDEV
		exit 7
	fi
else
	echo "Partition device doesn't exist: $PART"
	kpartx -dv $LOOPDEV
	sleep 1
	losetup -d $LOOPDEV
	exit 8
fi

umount_vm.sh

#! /bin/sh

if [ $# -eq 0 ]
then
        echo "No arguments supplied"
        exit 1
fi


if [ -z "$1" ]
then
        echo "No arguments supplied"
        exit 2
else
        if [ "$1" -lt 100 ];then
                echo "VMID must be greater than 100"
                exit 3
        fi
fi

VMID=$1
#IMG="/var/lib/vz/images/$VMID/vm-$VMID-disk-1.raw"
MOUNTPOINT="/mnt/$VMID"
LOOPDEV=`losetup -a|grep "$VMID"|awk -F: '{ print $1 }'`

#if [ -f $IMG ]
#then
#        echo "Umounting file: $IMG"
#else
#        echo "File doesn't exist: $IMG"
#        echo "Are you sure that VM $VMID has a KVM raw file?"
#        exit 4
#fi

if mountpoint -q "$MOUNTPOINT"
then
        echo "Unmounting VMID_$VMID"
        umount "$MOUNTPOINT"
	kpartx -dv "$LOOPDEV"
	sleep 1
	losetup -d "$LOOPDEV"
else
	echo "Not mounted"
	exit 4
fi

El script "mount_vm.sh" sirve para acceder al contenido de una VM desde el servidor de Proxmox.

./mount_vm.sh []

El parámetro PARTID es opcional. Si no se especifica, se montará la primera partición del disco. Las particiones se montan en modo lectura.

El script "umount_vm.sh" desmonta esas particiones y restablece la situación inicial.

Por mejorar: si algo falla en el proceso, echar marcha atrás