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

   1 #!/bin/bash
   2
   3 # for duplicity source build
   4 PATH="$PATH:/usr/local/bin"
   5
   6 # [--retry] interval_name [max_age]
   7 # takes 2 arguments specifying the name of the subfolder,
   8 # and optionally, the max age of the backup
   9
  10 # this script setup by adding a user crontab. see t.org for the script
  11 # it's also setup to email me only when it fails, and only for daily or weekly runs
  12
  13 # uncomment for debugging, prints all commands to stdout
  14 #set -x
  15
  16 set -E
  17 #trap 'echo trapped error from \"$BASH_COMMAND\" returned $? line $LINENO; accumulated_errors=true' ERR
  18 trap 'echo trapped err: $?; accumulated_errors=true' ERR
  19
  20 exec 3>&1 4>&2
  21 exec &>> /tmp/small-backup.log
  22
  23 echo "BEGIN: $(date): args $*"
  24
  25
  26 # only works with a single letter, ie 2D, not 2D12h
  27 half-time() {
  28     local time_word
  29     local letter=${1##*[0-9]}
  30     case $letter in
  31         s) time_wrod=second ;;
  32         m) time_word=minute ;;
  33         h) time_word=hour ;;
  34         D) time_word=day ;;
  35         W) time_word=week ;;
  36         M) time_word=month ;;
  37         Y) time_word=year ;;
  38     esac
  39     echo "${1%%$letter} $time_word"
  40     local x=$(date +%s -d "${1%%$letter} $time_word")
  41     local y=$(date +%s)
  42 }
  43
  44
  45 if [[ $1 == --retry ]]; then
  46     shift
  47     x=0
  48     while pid=( $(pidof -o %PPID -x ${0##*/}) ) && (( ${#pid[@]} > 1 )) && (( x < 20 )); do
  49         x=$(( x + 1 ))
  50         sleep 30
  51     done
  52     if [[ $x == 20 ]]; then
  53         ps -F ${pid[@]}
  54         echo timeout error: existing ${0##*/} running for over 5 minutes >&2
  55         exit 1
  56     fi
  57 else
  58     if pid=( $(pidof -o %PPID -x ${0##*/}) ) && (( ${#pid[@]} > 1 )); then
  59         echo ps -F ${pid[@]}
  60         ps -F ${pid[@]}
  61         echo error: existing ${0##*/} running >&2
  62         exit 1
  63     fi
  64 fi
  65
  66 interval=$1
  67 max_age=$2
  68 full_backup_arg=""
  69 if [[ $max_age ]]; then
  70     full_backup_arg="--full-if-older-than $(half-time $max_age)"
  71 fi
  72
  73 rbackup () {
  74
  75     local d=$1
  76     shift
  77     local dest=root@li::/root/rdiff-backups/${d##*/}/${interval}
  78
  79     c="rdiff-backup $* --create-full-path $d $dest"
  80     echo "$c"; $c
  81
  82     if [[ $max_age ]]; then
  83         c="rdiff-backup --force --remove-older-than $max_age $dest"
  84         echo "$c"; $c
  85
  86     fi
  87 }
  88
  89
  90 rbackup /a/bin --exclude /a/bin/fai-basefiles
  91 rbackup /a/c
  92
  93 # this is populated after input_setup.sh is run on login
  94
  95 ssh root@li mkdir -p /root/duplicity-backups/p/$interval
  96 source /p/duplicity/gpg_agent_env
  97 duplicity_dest=rsync://root@li//root/duplicity-backups/p/$interval
  98
  99 x=(/p/*)
 100 if ((${#x[@]} > 1)); then
 101     set -x
 102     # archive-dir is sort of a persistent cache
 103     duplicity --use-agent \
 104               --encrypt-sign-key E969C67B \
 105               --include-globbing-filelist /p/duplicity/filelist \
 106               --archive-dir /p/duplicity/archive \
 107               --tempdir /p/tmp \
 108               $full_backup_arg /p $duplicity_dest
 109     if [[ $max_age ]]; then
 110         duplicity --use-agent \
 111                   remove-all-but-n-full 2 --force $duplicity_dest
 112     fi
 113     set +x
 114 fi
 115 # example restore command. We only need to make the first argument be a url for it to know it to do restore
 116 # the archive-dir and tempdir args are not needed
 117 # 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
 118
 119
 120 echo END
 121
 122 # to restore duplicity. see man for additional options
 123 # duplicity --use-agent restore ...
 124 if [[ $accumulated_error ]]; then
 125     eccho "tail -n 50 of /tmp/small-backup.log:"
 126     tail -n 50 /tmp/small-backup.log
 127     exit 1
 128 fi