iankelling.org Git - distro-setup/blob - btrbkr2

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: AGPL-3.0-or-later
   4 # SPDX-License-Identifier: GPL-3.0-or-later
   5 # SPDX-License-Identifier: Apache-2.0
   6
   7 source /a/bin/bash-bear-trap/bash-bear
   8
   9 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  10
  11 usage() {
  12   cat <<EOF
  13 Usage: ${0##*/} TARGET_HOST
  14 Send btrbk for root2
  15
  16
  17 -h|--help  Print help and exit.
  18
  19 Note: Uses util-linux getopt option parsing: spaces between args and
  20 options, short options can be combined, options before args.
  21 EOF
  22   exit $1
  23 }
  24
  25 ##### begin command line parsing ########
  26
  27 # ensure we can handle args with spaces or empty.
  28 ret=0; getopt -T || ret=$?
  29 [[ $ret == 4 ]] || { echo "Install util-linux for enhanced getopt" >&2; exit 1; }
  30
  31 temp=$(getopt -l help h "$@") || usage 1
  32 eval set -- "$temp"
  33 while true; do
  34   case $1 in
  35     -h|--help) usage ;;
  36     --) shift; break ;;
  37     *) echo "$0: unexpected args: $*" >&2 ; usage 1 ;;
  38   esac
  39   shift
  40 done
  41
  42 read -r target <<<"$@"
  43
  44 if [[ ! $target ]]; then
  45   echo $0: error: specify target
  46   exit 1
  47 fi
  48
  49 cat >/etc/btrbk/root2.conf <<EOF
  50
  51 ssh_identity /root/.ssh/home
  52 # Just a guess that local7 is a good facility to pick.
  53 # It's a bit odd that the transaction log has to be logged to
  54 # a file or syslog, while other output is sent to std out.
  55 # The man does not mention a way for them to be together, but
  56 # I dunno if setting a log level like warn might also output
  57 # transaction info.
  58 transaction_syslog local7
  59
  60 # trying this out
  61 stream_compress zstd
  62
  63 archive_preserve_min latest
  64
  65 # so we only run one at a time
  66 lockfile   /var/lock/btrbkroot2.lock
  67
  68 # default format of short does not accomidate hourly preservation setting
  69 timestamp_format long-iso
  70
  71 # dont make new snapshot, we only receive new snapshots
  72 snapshot_create no
  73
  74 # if something fails and it's not obvious, try doing
  75 # btrbk -l debug -v dryrun
  76
  77 rate_limit no
  78 volume /mnt/r7/amy
  79 subvolume root_ubuntubionic
  80 target send-receive ssh://$target/mnt/root2/btrbk
  81 volume /mnt/r7/amy
  82 subvolume boot_ubuntubionic
  83 target send-receive ssh://$target/mnt/boot2/btrbk
  84
  85 EOF
  86
  87 tmpconf=$(mktemp -d)/b.conf
  88
  89 timeout -s 9 6 ssh root@$target mkdir -p /mnt/{b,r}oot2/btrbk
  90
  91 exclude=root
  92 for base in boot root; do
  93   cat - /etc/btrbk/root2.conf >$tmpconf <<<"archive_exclude ${exclude}_ubuntubionic"
  94   btrbk -c $tmpconf archive /mnt/r7/amy/btrbk ssh://$target/mnt/${base}2/btrbk
  95   # swaps the vars
  96   exclude=$base
  97 done