backup virtual

backup virtual

#!/bin/bash

LANG=C

# Default variables
dest="/srv/backups/virt"
cleanup=0
confdir="/etc/libvirt/qemu"
shell="/usr/bin/virsh"
xmldir="${dest}/xml"
images="${dest}/images"
date=$(date +%d_%m_%Y)


usage() {
    echo -e "\n    Usage: $0 [PARAMETERS] \n
    Run backup of virtual machines.
    \n
    PARAMETERS:
    -n, --name= name of virtual machine to backup (required)\n
     Optional (see script header for defaults):
    -d, --dest= backup destination directory
    -r, --remove= days to store backups, older files will be removed. Default is 0 (forever)
    -h, --help display this help"
}

if [ "$#" -eq 0 ]; then
    usage
    exit
fi

while [ "$#" -gt 0 ]; do
  case "$1" in
    -n) name="$2"; shift 2;;
    -d) dest="$2"; shift 2;;
    -r) cleanup="$2"; shift 2;;
    -h) usage; exit; ;;

    --name=*) name="${1#*=}"; shift 1;;
    --dest=*) sest="${1#*=}"; shift 1;;
    --remove=*) cleanup="${1#*=}"; shift 1;;
    --help) usage; exit; ;;
    --name|--dest) echo "$1 requires an argument" >&2; exit 1;;

    -*) echo -e "Unknown option: $1\nUse --help or -h for usage information" >&2; exit 1;;
    *) handle_argument "$1"; shift 1;;
  esac
done

if [ "x${name}" = "x" ]; then
    echo "Error: Virtual machine name is a required argument!"
    exit 0
fi

# lock|unlock for service status check script
lock() {
    if [ ! -f /tmp/bcp ]; then
        mkdir -p /tmp/bcp
    fi
    echo "Locking ${name}"
    touch /tmp/bcp/${name}.lock
}

unlock() {
    echo "Unlocking ${name}"
    rm -f /tmp/bcp/${name}.lock
}

copy() {
    for disk in $($shell -q -r domblklist ${name} --details | grep disk | awk '{ print $4 }')
    do
        ext=$(echo ${disk} | rev | cut -d\. -f 1 | rev)
        img=$(echo ${disk} | cut -d\. -f 1 | rev | cut -d\/ -f 1 | rev)
        echo "Copying ${disk} to destination directory"
        cp ${disk} ${images}/${img}-${date}.${ext}
    done
    echo "Copying ${name}'s config to destination directory"
    cp ${confdir}/${name}.xml ${xmldir}/${name}-${date}.xml
}

clean(){
    for fldr in ${images} ${xmldir}
    do
        echo "Delete files in ${fldr} older than ${days}"
        find ${fldr} -type f -name ${name}\* -mtime $days -delete
    done
}

# Check target directory structure
if [ ! -d ${images} ]; then
    mkdir -p ${images}
elif [ ! -d ${xmldir} ]; then
    mkdir -p ${xmldir}
fi

state=$($shell domstate ${name})
if [ "x${state}" = "xrunning" ]; then
    lock
    locked=1
    $shell suspend $name
fi

copy

if [ $cleanup -gt 0 ]; then
    clean
fi
if [ $locked -eq 1 ]; then
   $shell resume $name
   unlock
fi