iankelling.org Git - distro-setup/blob - ziva-backup-check

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: AGPL-3.0-or-later
   4
   5 source /a/bin/errhandle/err
   6
   7 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
   8
   9 pre="${0##*/}:"
  10 err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
  11
  12 ## begin check on syncthing
  13 if ! systemctl show --no-page syncthing@ziva | sed -n 's/^MainPID=//p' | egrep '^[0-9]+$' &>/dev/null; then
  14   err no pid for syncthing@ziva. systemctl status:
  15   systemctl status syncthing@ziva
  16 fi
  17 ## end check on syncthing
  18
  19
  20 ## begin check on btrbk
  21 age_limit_sec=$(( 60 * 60 * 24 * 7 )) # 7 days.
  22 for prefix in root boot; do
  23   if [[ $prefix == boot ]]; then
  24     # its not uncommon for the /boot subvol to have no changes, and thus
  25     # no new backups for 10 days or so. todo: instead of this error
  26     # prone check, we should make it so the ziva computer will
  27     # touch a file on our computer whenever btrbk succeeds
  28     age_limit_sec=$(( age_limit_sec + 60* 60 * 24 * 35 ))
  29   fi
  30   vol=${prefix}_ubuntubionic
  31   snaps=(/mnt/r7/amy/$prefix/btrbk/${vol}.20*)
  32   if [[ ! ${snaps[*]} ]]; then
  33     err no snapshots starting with /mnt/r7/amy/$prefix/btrbk/${vol}.20
  34     break
  35   fi
  36
  37   read last_snap_sec last_snap < <(
  38     for s in ${snaps[@]}; do
  39       f=${s##*/}
  40       unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
  41       printf "%s %s\n" $unix_time $s # part of the pipeline
  42     done | sort -r | head -n 1 ||:
  43   )
  44   if [[ ! $last_snap ]]; then
  45     # should not happen.
  46     err "could not find latest snapshot for $svp among ${snaps[*]}"
  47     exit 1
  48   fi
  49   if (( last_snap_sec < EPOCHSECONDS - age_limit_sec )); then
  50     err vol $vol last backup older than 50 hours: $last_snap
  51   fi
  52 done
  53 ## end check on btrbk