mdw@git.distorted.org.uk Git - rsync-backup/blob - mount-backup-volume

   1 #! /bin/sh -ex
   2
   3 : ${vgtag=@backup} ${vgprefix=vg-backup-}
   4 : ${mntbkpdir=/mnt/bkp}
   5 : ${STOREDIR=$mntbkpdir/store} ${METADIR=$mntbkpdir/meta}
   6
   7 vgs=$(vgs --noheadings -oname)
   8 found=nil
   9 for vg in $vgs; do
  10   case "$found,$vg" in
  11     nil,$vgprefix*)
  12       found=t
  13       tag=${vg#$vgprefix}
  14       ;;
  15     t,$vgprefix*)
  16       echo >&2 "$0: multiple backup volumes attached"
  17       exit 1
  18       ;;
  19   esac
  20 done
  21 case $found in
  22   nil) echo >&2 "$0: no backup volumes attached"; exit 1 ;;
  23 esac
  24 vg=$vgprefix$tag
  25
  26 vgchange -ay $vg
  27 mount /dev/$vg/meta $METADIR
  28
  29 cryptop decrypt backup <$METADIR/crypt.blob |
  30         cryptsetup luksOpen --key-file=- /dev/$vg/crypt cbackup
  31 mount /dev/mapper/cbackup $STOREDIR