code.delx.au - monosys/blob - backup

   1 #!/bin/bash
   2
   3 set -eu
   4
   5 if [ "$(id -u)" -ne 0 ]; then
   6     echo "Must be root"
   7     exit 1
   8 fi
   9
  10 if [ "$(pgrep backup)" != "$$" ]; then
  11     echo "Backup is still running!"
  12     exit 1
  13 fi
  14
  15 if [ -z "${1:-}" ]; then
  16     echo "Usage: $0 root"
  17     exit 1
  18 fi
  19
  20 BACKUP_PROFILE="$1"
  21 source "/etc/borg/${BACKUP_PROFILE}/env"
  22 HOME=/root
  23
  24 ionice -c 3 -p $$
  25 renice -n 19 -p $$ > /dev/null
  26
  27 if [ "$BACKUP_SNAP" -eq 1 ]; then
  28     echo ">>> Snapshotting"
  29     bsnap on
  30 fi
  31
  32 cd "$BACKUP_PATH"
  33
  34 echo ">>> Starting backup"
  35 borg create \
  36     $([ -t 0 ] && echo --progress) \
  37     --info --stats \
  38     --compression lz4 \
  39     --exclude-from "/etc/borg/${BACKUP_PROFILE}/exclude" \
  40     "${BACKUP_REPO}::{hostname}-{now}" .
  41
  42 echo ">>> Pruning old backups"
  43 borg prune \
  44     --info --stats \
  45     --keep-daily=7 \
  46     --keep-weekly=4 \
  47     --keep-monthly=12 \
  48     --prefix='{hostname}-' \
  49     "$BACKUP_REPO"
  50
  51 cd /
  52
  53 if [ "$BACKUP_SNAP" -eq 1 ]; then
  54     echo ">>> Unsnapshotting"
  55     bsnap off
  56 fi
  57
  58 exit 0