iankelling.org Git - distro-setup/blob - disabled/small-backup

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23
  24 # for duplicity source build
  25 PATH="$PATH:/usr/local/bin"
  26
  27 # [--retry] interval_name [max_age]
  28 # takes 2 arguments specifying the name of the subfolder,
  29 # and optionally, the max age of the backup
  30
  31 # this script setup by adding a user crontab. see t.org for the script
  32 # it's also setup to email me only when it fails, and only for daily or weekly runs
  33
  34 # uncomment for debugging, prints all commands to stdout
  35 #set -x
  36
  37 set -E
  38 #trap 'echo trapped error from \"$BASH_COMMAND\" returned $? line $LINENO; accumulated_errors=true' ERR
  39 trap 'echo trapped err: $?; accumulated_errors=true' ERR
  40
  41 exec 3>&1 4>&2
  42 exec &>> /tmp/small-backup.log
  43
  44 echo "BEGIN: $(date): args $*"
  45
  46
  47 # only works with a single letter, ie 2D, not 2D12h
  48 half-time() {
  49     local time_word
  50     local letter=${1##*[0-9]}
  51     case $letter in
  52         s) time_wrod=second ;;
  53         m) time_word=minute ;;
  54         h) time_word=hour ;;
  55         D) time_word=day ;;
  56         W) time_word=week ;;
  57         M) time_word=month ;;
  58         Y) time_word=year ;;
  59     esac
  60     echo "${1%%$letter} $time_word"
  61     local x=$(date +%s -d "${1%%$letter} $time_word")
  62     local y=$(date +%s)
  63 }
  64
  65
  66 if [[ $1 == --retry ]]; then
  67     shift
  68     x=0
  69     while pid=( $(pidof -o %PPID -x ${0##*/}) ) && (( ${#pid[@]} > 1 )) && (( x < 20 )); do
  70         x=$(( x + 1 ))
  71         sleep 30
  72     done
  73     if [[ $x == 20 ]]; then
  74         ps -F ${pid[@]}
  75         echo timeout error: existing ${0##*/} running for over 5 minutes >&2
  76         exit 1
  77     fi
  78 else
  79     if pid=( $(pidof -o %PPID -x ${0##*/}) ) && (( ${#pid[@]} > 1 )); then
  80         echo ps -F ${pid[@]}
  81         ps -F ${pid[@]}
  82         echo error: existing ${0##*/} running >&2
  83         exit 1
  84     fi
  85 fi
  86
  87 interval=$1
  88 max_age=$2
  89 full_backup_arg=""
  90 if [[ $max_age ]]; then
  91     full_backup_arg="--full-if-older-than $(half-time $max_age)"
  92 fi
  93
  94 rbackup () {
  95
  96     local d=$1
  97     shift
  98     local dest=root@li::/root/rdiff-backups/${d##*/}/${interval}
  99
 100     c="rdiff-backup $* --create-full-path $d $dest"
 101     echo "$c"; $c
 102
 103     if [[ $max_age ]]; then
 104         c="rdiff-backup --force --remove-older-than $max_age $dest"
 105         echo "$c"; $c
 106
 107     fi
 108 }
 109
 110
 111 rbackup /a/bin --exclude /a/bin/fai-basefiles
 112 rbackup /a/c
 113
 114 # this is populated after input_setup.sh is run on login
 115
 116 ssh root@li mkdir -p /root/duplicity-backups/p/$interval
 117 source /p/duplicity/gpg_agent_env
 118 duplicity_dest=rsync://root@li//root/duplicity-backups/p/$interval
 119
 120 x=(/p/*)
 121 if ((${#x[@]} > 1)); then
 122     set -x
 123     # archive-dir is sort of a persistent cache
 124     duplicity --use-agent \
 125               --encrypt-sign-key E969C67B \
 126               --include-globbing-filelist /p/duplicity/filelist \
 127               --archive-dir /p/duplicity/archive \
 128               --tempdir /p/tmp \
 129               $full_backup_arg /p $duplicity_dest
 130     if [[ $max_age ]]; then
 131         duplicity --use-agent \
 132                   remove-all-but-n-full 2 --force $duplicity_dest
 133     fi
 134     set +x
 135 fi
 136 # example restore command. We only need to make the first argument be a url for it to know it to do restore
 137 # the archive-dir and tempdir args are not needed
 138 # duplicity --use-agent --encrypt-sign-key E969C67B --archive-dir /p/duplicity/archive --tempdir /p/tmp ssh://root@li//root/duplicity-backups/p/weekly /p/duptest
 139
 140
 141 echo END
 142
 143 # to restore duplicity. see man for additional options
 144 # duplicity --use-agent restore ...
 145 if [[ $accumulated_error ]]; then
 146     eccho "tail -n 50 of /tmp/small-backup.log:"
 147     tail -n 50 /tmp/small-backup.log
 148     exit 1
 149 fi