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 now=$(date +%s)
  22 age_limit_sec=$(( 60 * 60 * 50 )) # 50 hours
  23 for vol in {root,boot}_ubuntubionic; do
  24   snaps=(/mnt/r7/amy/btrbk/${vol}.20*)
  25   if [[ ! ${snaps[*]} ]]; then
  26     err no snapshots starting with /mnt/r7/amy/btrbk/${vol}_ubuntubionic.20
  27     break
  28   fi
  29
  30   read last_snap_sec last_snap < <(
  31     for s in ${snaps[@]}; do
  32       f=${s##*/}
  33       unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
  34       printf "%s %s\n" $unix_time $s # part of the pipeline
  35     done | sort -r | head -n 1 ||:
  36            )
  37   if [[ ! $last_snap ]]; then
  38     # should not happen.
  39     err "could not find latest snapshot for $svp among ${snaps[*]}"
  40     exit 1
  41   fi
  42   if (( last_snap_sec < now - age_limit_sec )); then
  43     err vol $vol last backup older than 50 hours: $last_snap
  44   fi
  45 done
  46 ## end check on btrbk