code.delx.au - monosys/blob - lib-ext-backup

   1 #!/bin/bash
   2
   3 function cryptsetup_open {
   4     for DEVICE in /dev/disk/by-partlabel/ext*backup*; do
   5         if ! [ -L "$DEVICE" ]; then
   6             continue
   7         fi
   8         DISKNAME="$(basename "$DEVICE")"
   9         CRYPTNAME="crypt-$DISKNAME"
  10         echo "> cryptsetup luksOpen $DEVICE $CRYPTNAME"
  11         cryptsetup luksOpen "$DEVICE" "$CRYPTNAME" --key-file "/etc/lukskeys/${DISKNAME}"
  12         mkdir -p /run/ext-backup-crypt/
  13         ln -sf "/dev/mapper/$CRYPTNAME" /run/ext-backup-crypt/
  14     done
  15 }
  16
  17 function cryptsetup_close {
  18     for CRYPTDEVICE in /dev/mapper/crypt-ext*backup*; do
  19         if ! [ -L "$CRYPTDEVICE" ]; then
  20             continue
  21         fi
  22         CRYPTNAME="$(basename "$CRYPTDEVICE")"
  23         echo "> cryptsetup luksClose $CRYPTNAME"
  24         cryptsetup luksClose "$CRYPTNAME"
  25         rm -f "/run/ext-backup-crypt/$CRYPTNAME"
  26     done
  27 }
  28
  29 function pool_import {
  30     echo "> zpool import -d /run/ext-backup-crypt -a"
  31     zpool import -d /run/ext-backup-crypt -a
  32
  33     ZPOOLNAME="$(zpool list -H -o name|grep 'ext.*backup'|head -n1)"
  34     if [ -z "$ZPOOLNAME" ]; then
  35         echo "Error! Could not find pool!"
  36         return 1
  37     fi
  38
  39     echo "> Found: $ZPOOLNAME"
  40 }
  41
  42 function pool_export {
  43     echo "> zpool export $ZPOOLNAME"
  44     for _ in $(seq 60); do
  45         zpool export "$ZPOOLNAME" && break
  46         sleep 1
  47     done
  48 }
  49
  50 function pool_setup {
  51     zfs set mountpoint="/mnt/$ZPOOLNAME" "$ZPOOLNAME"
  52     chmod 0700 "/mnt/$ZPOOLNAME"
  53     zfs set compression=lz4 "$ZPOOLNAME"
  54     zfs set devices=off "$ZPOOLNAME"
  55     zfs set exec=off "$ZPOOLNAME"
  56     zfs set setuid=off "$ZPOOLNAME"
  57     zfs set xattr=sa "$ZPOOLNAME"
  58     zfs set acltype=posixacl "$ZPOOLNAME"
  59 }
  60
  61 function syncoidw {
  62     echo "> syncoid $1"
  63     syncoid "$@" --identifier "$ZPOOLNAME"
  64
  65     zfs list -t snapshot -H -o name -r "$ZPOOLNAME" \
  66         | grep -F @syncoid_ \
  67         | grep -Fv "@syncoid_$ZPOOLNAME" \
  68         | xargs -rn1 zfs destroy -v
  69 }
  70
  71 function snapshot_cleanup {
  72     echo "> Cleaning snapshots"
  73     sanoid --configdir=/etc/sanoid/ext-backup --verbose --prune-snapshots
  74 }
  75
  76 function main {
  77     zfs get all -s local -H > /root/zfs-props.txt
  78     cryptsetup_open
  79     pool_import
  80     pool_setup
  81     snapshot_sync
  82     snapshot_cleanup
  83     pool_export
  84     cryptsetup_close
  85 }