#!/bin/bash
-# Copyright (C) 2016 Ian Kelling
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
+# Configure & run btrbk & related work on Ian's computers.
+# Copyright (C) 2024 Ian Kelling
-# http://www.apache.org/licenses/LICENSE-2.0
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# SPDX-License-Identifier: GPL-3.0-or-later
# todo: if we cancel in the middle of a btrfs send, then run again
[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
-source /usr/local/lib/err
+set -e; . /usr/local/lib/bash-bear; set +e
+shopt -s nullglob
usage() {
cat <<'EOF'
-btrbk-run [OPTIONS]
+btrbk-run [OPTIONS] [run|resume|archive]
usually -t TARGET_HOST or -s SOURCE_HOST
Note, at source location, intentionally not executable, run and read
}
+pre=btrbk-run
+
+script_name="${BASH_SOURCE[0]}"
+script_name="${script_name##*/}"
+d() {
+ if $dry_run || $conf_only; then
+ printf "$pre dry-run: %s\n" "$*"
+ else
+ printf "$pre running: %s\n" "$*"
+ "$@"
+ fi
+}
+m() { if $verbose; then printf "$pre %s\n" "$*"; fi; "$@"; }
+e() { printf "$pre %s\n" "$*"; }
+die() { printf "$pre error: %s\n" "$*" >&2; echo "$pre exiting with status 1" >&2; exit 1; }
+mexit() { echo "$pre exiting with status $1"; exit $1; }
+
+uninstalled-file-die() {
+ die "uninstalled file $1. run install-my-scripts or rerun with -f"
+}
+
+set-location() {
+ case $HOSTNAME in
+ kw)
+ at_work=true
+ ;;
+ kd|frodo)
+ at_home=true
+ ;;
+ x2|x3|sy|so)
+ if [[ $(dig +short @10.2.0.1 -x 10.2.0.2 2>&1 ||:) == kd.b8.nz. ]] \
+ && ip n show 10.2.0.1 | grep . &>/dev/null; then
+ # note: logic duplicated in 11-iank
+ at_home=true
+ elif ping -q -c1 -w1 hal.office.fsf.org &>/dev/null \
+ && ip n show 192.168.0.26 | grep . &>/dev/null; then
+ at_work=true
+ fi
+ ;;
+ esac
+}
+
+exit-if-no-default-targets() {
+ if ! $force && [[ $HOSTNAME != "$MAIL_HOST" ]]; then
+ echo "MAIL_HOST=$MAIL_HOST, nothing to do"
+ mexit 0
+ fi
+ case $HOSTNAME in
+ kw|kd|frodo|x2|x3|sy|so) : ;;
+ *)
+ die "error: no default targets for this host, use -t"
+ ;;
+ esac
+}
+
+add-x3-target() {
+ # main work machine
+ if ping -q -c1 -w1 x3.office.fsf.org &>/dev/null; then
+ targets+=(x3.office.fsf.org)
+ elif ping -q -c1 -w1 $h.b8.nz &>/dev/null; then
+ # in case we took it home
+ targets+=(x3.b8.nz)
+ elif ping -q -c1 -w1 ${h}w.b8.nz &>/dev/null; then
+ targets+=(x3w.b8.nz)
+ else
+ targets+=(x3wg.b8.nz)
+ fi
+}
+
+add-wireless-target() {
+ local host
+ if [[ ! $1 ]]; then
+ set -- $h
+ fi
+ for host; do
+ # c = cabled, w = wireless
+ if ping -q -c1 -w1 ${host}c.b8.nz &>/dev/null; then
+ targets+=(${host}c.b8.nz)
+ elif ping -q -c1 -w1 $host.b8.nz &>/dev/null; then
+ targets+=($host.b8.nz)
+ elif ping -q -c1 -w1 ${host}w.b8.nz &>/dev/null; then
+ targets+=(${host}w.b8.nz)
+ fi
+ done
+}
+
+qconf() {
+ case $sub in
+ q)
+ # q has sensitive data i dont want to backup for so long
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
+snapshot_preserve $q_preserve
+snapshot_preserve_min 2h
+snapshot_dir btrbk
+target_preserve $q_preserve
+target_preserve_min 2h
+EOF
+ ;;
+ esac
+
+}
-pre="${0##*/}: "
-m() { if $verbose; then printf "$pre%s\n" "$*"; fi; "$@"; }
-e() { printf "$pre%s\n" "$*"; }
-die() { printf "$pre%s\n" "$*" >&2; echo "exiting with status 1" >&2; exit 1; }
-mexit() { echo "$pre: exiting with status $1"; exit $1; }
# latest $MAIL_HOST
if [[ -e /b/bash_unpublished/source-state ]]; then
dry_run=false # mostly for testing
rate_limit=no
verbose=true; verbose_arg=-v
-progress_arg="--progress"
+force=false
+if [[ $INVOCATION_ID ]]; then
+ # INVOCATION_ID means running as a systemd service. we cant show progress in this case,
+ # but if we pass the arg, it will insert mbuffer into the command.
+ progress_arg=
+else
+ progress_arg="--progress"
+fi
incremental_strict=false
pull_reexec=false
default_args_file=/etc/btrbk-run.conf
if [[ -s $default_args_file ]]; then
+ # shellcheck disable=SC2046 # we want word splitting
set -- $(< $default_args_file) "$@"
# i havent used this feature yet, so warn about it
echo "$0: warning: default btrbk-run options set in $default_args_file (sleeping 5 seconds):"
sleep 5
fi
-early=false # quit early, just btrbk, no extra remounting etc.
-cron=false
+once_args_file=/etc/btrbk-run-once.conf
+if mv -f $once_args_file $once_args_file-tmp 2> >(sed '/No such file or directory/d'); then
+ # shellcheck disable=SC2046 # we want word splitting
+ set -- $(< $once_args_file-tmp) "$@"
+ # i havent used this feature yet, so warn about it
+ echo "$0: btrbk-run options set in $once_args_file:"
+ cat $once_args_file-tmp
+ rm -f $once_args_file-tmp
+fi
+
+
+targets=()
+early=false
+fast=false
+kd_spread=false
+check_installed=false
orig_args=("$@")
-temp=$(getopt -l cron,pull-reexec,help ceil:m:npqs:t:vh "$@") || usage 1
+temp=$(getopt -l check-installed,fast,pull-reexec,help 23cefikl:m:npqrs:t:vh "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
- --cron)
- cron=true
- pre=
- shift
- ;;
+ # for the rare case we want to run multiple instances at the same time
+ -2) conf_suf=2 ;;
+ -3) conf_suf=3 ;;
# only creates the config file, does not run btrbk
- -c) conf_only=true; shift ;;
- -e) early=true; shift ;;
- -i) incremental_strict=true; shift ;;
+ -c) conf_only=true ;;
+ --check-installed)
+ check_installed=true
+ ;;
+ # quit early, just btrbk, no extra remounting etc.
+ -e) early=true ;;
+ # avoids some default behaviors:
+ # - no skipping hosts where xprintidle haven't been idle recently
+ # - exit if we can't ssh to 1 or more hosts
+ # - still set default hosts despite MAIL_HOST status
+ -f) force=true ;;
+ # skip various checks. when we run twice in a row for
+ # switch mail-host, no need to repeat the same checks again.
+ --fast) fast=true ;;
+ -i) incremental_strict=true ;;
+ # note this implies resume and -p because it is just meant to make
+ # other hosts have the same snapshots, not do any expiry or new
+ # backups.
+ -k) kd_spread=true ;;
# bytes per second, suffix k m g
- -l) rate_limit=$2; shift 2 ;;
+ -l) rate_limit=$2; shift ;;
# Comma separated mountpoints to backup. This has defaults set below.
- -m) IFS=, mountpoints=($2); unset IFS; shift 2 ;;
- -n) dry_run=true; dry_run_arg=-n; shift ;;
- -p) progress_arg="--progress"; shift ;;
- --pull-reexec) pull_reexec=true; shift ;;
- -q) verbose=false; verbose_arg=; progress_arg=; shift ;;
+ -m) IFS=, mountpoints=($2); unset IFS; shift ;;
+ -n) dry_run=true ;;
+ # preserve existing snapshots and backups
+ -p) preserve_arg=-p ;;
+ # internal option for rerunning under newer SOURCE_HOST version.
+ --pull-reexec) pull_reexec=true;;
+ # quiet
+ -q) verbose=false; verbose_arg=; progress_arg= ;;
# source host to receive a backup from
-s)
source=$2
if [[ $source == *:* ]]; then
bbksource="[$source]"
fi
- shift 2
+ shift
;;
# target hosts to send to. empty is valid for just doing local
# snapshot. we have default hosts we will populate.
- -t) IFS=, targets=($2); unset IFS; shift 2 ;;
- -v) verbose=true; verbose_arg=-v; shift ;;
+ -t) IFS=, targets=($2); unset IFS; shift ;;
+ # verbose.
+ -v) verbose=true; verbose_arg=-v ;;
-h|--help) usage ;;
--) shift; break ;;
*) die "Internal error!" ;;
esac
+ shift
done
-# only tested commands are resume and archive
-cmd_arg=${1:-run}
+cmd_arg="$1"
+
+
+
+if ! $force && { $check_installed || [[ ! $source ]]; } ; then
+ install_bin_files=(
+ mount-latest-subvol
+ check-subvol-stale
+ btrbk-run
+ )
+ for f in ${install_bin_files[@]}; do
+ if ! diff -q /a/bin/ds/$f /usr/local/bin/$f; then
+ uninstalled-file-die $f
+ fi
+ done
+ if ! diff -q /a/bin/bash-bear-trap/bash-bear /usr/local/lib/bash-bear; then
+ uninstalled-file-die err
+ fi
+ if $check_installed; then
+ exit 0
+ fi
+fi
+
+
+if $kd_spread; then
+ if [[ $cmd_arg && $cmd_arg != resume ]]; then
+ die "dont pass -k without resume or empty run arg"
+ fi
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ die "something went wrong, -k not meant to be run on MAIL_HOST"
+ fi
+ if [[ $HOSTNAME != kd ]]; then
+ die "something went wrong, -k only meant to run on kd"
+ fi
+ cmd_arg=resume
+ preserve_arg=-p
+ add-wireless-target sy so
+fi
+
+if [[ ! $cmd_arg ]]; then
+ cmd_arg=run
+fi
+
+
+std_preserve="36h 14d 8w 24m"
+q_preserve="18h 14d 8w"
case $cmd_arg in
- run|resume|archive) : ;;
+ run|resume) : ;;
+
+ # This works better than the normal archive command. We have to
+ # specify the mount points, but that is what we are used to doing and
+ # we prefer it. Another difference is that archive works recursively
+ # and we don't care about that. Sometimes we may still want to run
+ # btrbk archive, but it doesn't even use the config file, so just
+ # run it directly, eg:
+ # time s btrbk -v archive /mnt/r7/amy/boot/btrbk ssh://bo/mnt/boot2/btrbk
+ archive)
+ cmd_arg=resume
+ std_preserve="999h 999d 999w 999m"
+ q_preserve="$std_preserve"
+ preserve_arg=-p
+ ;;
*) die "untested command arg" ;;
esac
die "error: -t and -s are mutually exclusive"
fi
-if $verbose; then
- printf "options: conf_only=%s\ndry_run=%s\nrate_limit=%s\nverbose=%s\ncmd_arg=%s" "$conf_only" "$dry_run" "$rate_limit" "$verbose" "$cmd_arg"
-fi
### end options parsing
# remove path from earlier version of btrbk
fi
cd /a/opt/btrbk
m make install
+ cd /
fi
# TODO: i wonder if there should be an option to send to the default
# targets, plus any given on the command line.
-amy=false
-# set default targets
-if [[ ! -v targets && ! $source ]]; then
- if [[ $HOSTNAME != "$MAIL_HOST" ]] && $cron ; then
- echo "MAIL_HOST=$MAIL_HOST, nothing to do"
- mexit 0
- else
- amy=true
- fi
+at_work=false
+at_home=false
- at_work=false
- targets=(frodo.b8.nz)
- case $HOSTNAME in
- kw)
- at_work=true
- ;;&
- x2|x3|sy|bo)
- if ping -q -c1 -w1 hal.office.fsf.org \
- && ip n show 192.168.0.26 | grep . &>/dev/null; then
- at_work=true
+# set default targets
+if [[ ! -v targets && ! $source ]]; then
+ exit-if-no-default-targets
+ set-location
+ if $at_home; then
+ if ! $kd_spread && [[ $HOSTNAME != x3 ]]; then
+ add-x3-target
+ fi
+ if [[ $HOSTNAME != kd ]]; then
+ targets+=(kd.b8.nz)
+ fi
+ wireless_home_hosts=(
+ x2
+ sy
+ so
+ )
+ for h in ${wireless_home_hosts[@]}; do
+ if [[ $HOSTNAME != "$h" ]]; then
+ add-wireless-target
fi
- ;;&
- kw|x2|x3|sy|bo)
- if $at_work; then
- if ping -q -c1 -w1 iank.vpn.office.fsf.org &>/dev/null; then
- home=iank.vpn.office.fsf.org
- else
- home=i.b8.nz
- fi
- else
- home=b8.nz
+ done
+ elif $at_work; then
+ targets+=(b8.nz)
+ for h in x2 x3 kw; do
+ if [[ $HOSTNAME == "$h" ]]; then
+ continue
fi
- ;;&
- kw)
- targets+=($home x3)
- ;;
- x2|x3|sy|bo)
- targets+=($home)
- if $at_work; then
- targets+=(kw.office.fsf.org x2.b8.nz)
- else
- targets+=(kw.b8.nz)
+ if ping -q -c1 -w1 $h.office.fsf.org &>/dev/null; then
+ targets+=($h.office.fsf.org)
fi
- ;;
- kd)
- targets+=(x2.b8.nz kw.b8.nz)
- # temporarily disabled while doing maint
- # if ping -q -c1 -w1 bo.b8.nz &>/dev/null; then
- # targets+=(bo.b8.nz)
- # else
- # targets+=(bow.b8.nz)
- # fi
- ;;
- frodo)
- # no targets
- targets=()
- ;;
- *)
- die "error: no default targets for this host, use -t"
- ;;
- esac
-fi
-
-if [[ -v targets ]]; then
- echo "targets: ${targets[*]}"
-fi
-
-if [[ $source ]]; then
- echo "source: $source"
+ done
+ else
+ targets+=(b8.nz)
+ fi
fi
if [[ ${mountpoints[0]} ]]; then
prospective_mps=(/a)
else
case $HOSTNAME in
- frodo)
- prospective_mps=(/i)
- ;;
*)
- prospective_mps=(/a /q)
+ prospective_mps=()
if [[ $source ]]; then
- source_state="$(ssh $source cat /a/bin/bash_unpublished/source-state)"
+ source_state="$(ssh $source 'cat /a/bin/bash_unpublished/source-state; echo source_host=$HOSTNAME')"
eval "$source_state"
- source_host="$(ssh $source cat /etc/hostname)"
+ # shellcheck disable=SC2154 # assigned in the above eval.
if [[ $source_host == "$MAIL_HOST" ]]; then
prospective_mps+=(/o)
fi
+ if [[ $source_host == "$HOST2" ]]; then
+ prospective_mps+=(/a /qr /qd /q)
+ fi
else
if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- # HOST2 is really the mail host if it exists
- if [[ $HOST2 && $HOST2 != "$HOSTNAME" ]]; then
- echo "skipping /o because HOST2 is not us"
- else
- prospective_mps+=(/o)
- fi
+ prospective_mps+=(/o)
+ fi
+ if [[ $HOSTNAME == "$HOST2" ]]; then
+ prospective_mps+=(/a /qr /qd /q)
+ fi
+ if $kd_spread; then
+ prospective_mps=(/a /o /qr /qd /q)
fi
fi
+ # note: put q last just in case its specific retention options were to
+ # affect other config sections. I havent tested if that is the case.
;;
esac
fi
done
fi
-echo "mountpoints: ${mountpoints[*]}"
+tmp=$(( ${#mountpoints[@]} == 0 ))
+if (( tmp )); then
+ die didnt get mountpoint arg and had no defaults
+fi
##### end command line parsing ########
-if [[ $source ]]; then
+#### begin pre-checks #####
+
+# todo: this has a timing problem, since btrbk.timer could activate the service after this check.
+if ! $fast && [[ $source ]]; then
if [[ $(ssh $source ps --no-headers -o comm 1) == systemd ]]; then
status=$(ssh $source systemctl is-active btrbk.service) || : # normally returns 3
case $status in
inactive|failed) : ;;
*)
- echo "$0: error: cron btrbk is running on source. exiting out of caution"
+ echo "$0: error: btrbk is running on source. exiting out of caution"
mexit 1
esac
fi
fi
+if ! command -v btrbk &>/dev/null; then
+ die "error: no btrbk binary found"
+fi
+
+if ! $pull_reexec && [[ $source ]] && $pulla && ! $force ; then
+ ssh root@$source btrbk-run --check-installed || exit 1
+fi
+
+#### end pre-checks #####
+
+
+
+mkdir -p /var/log/btrbk
+# The journal doesnt go back to my oldest backups, and I've found myself
+# wanting older logs. Not going to bother expiring old logs, since it is
+# fine if they go back years.
+log_path=/var/log/btrbk/$(date +%F_%T%:::z).log
+echo copying output to $log_path
+exec &> >(pee cat 'ts "%F %T"|dd of='$log_path' status=none')
+
+# print some non-default opts
+if $verbose; then
+ opts_show=()
+ if ! $conf_only; then
+ opts_show+=(conf_only=true)
+ fi
+ if ! $dry_run; then
+ opts_show+=(dry_run=true)
+ fi
+ if [[ $rate_limit != no ]]; then
+ opts_show+=("rate_limit=$rate_limit")
+ fi
+ if [[ $cmd_arg != run ]]; then
+ opts_show+=(cmd_arg=$cmd_arg)
+ fi
+ if (( ${#opts_show[@]} >= 1 )); then
+ first=true
+ for opt in ${opts_show[@]}; do
+ if $first; then
+ printf "%s" "$opt"
+ first=false
+ else
+ printf " %s" "$opt"
+ fi
+ done
+ echo
+ fi
+fi
+
+if [[ -v targets ]]; then
+ echo "targets: ${targets[*]}"
+fi
+
+if [[ $source ]]; then
+ echo "source: $source"
+fi
+
+echo "mountpoints: ${mountpoints[*]}"
+
+
# pull_reexec stops us from getting into an infinite loop if there is some
# kind of weird problem
pulla=false
break
fi
done
+
if ! $pull_reexec && [[ $source ]] && $pulla ; then
tmpf=$(mktemp)
m rsync -ra $source:/usr/local/bin/{mount-latest-subvol,check-subvol-stale} /usr/local/bin
- m rsync -ra $source:/usr/local/lib/err /usr/local/lib
+ m rsync -ra $source:/usr/local/lib/bash-bear /usr/local/lib
m scp $source:/a/bin/distro-setup/btrbk-run $tmpf
if ! diff -q $tmpf ${BASH_SOURCE[0]}; then
e "found different version on host $source. reexecing"
fi
fi
-
-if ! which btrbk &>/dev/null; then
- die "error: no btrbk binary found"
+# todo: check if we have no snapshots yet, because I always want to run
+# archive instead of run. Likely, I should give an error unless a cli
+# override is passed. perhaps check-subvol-stale could give the error.
+# see the error message "no snapshots found" in that file.
+if ! $fast; then
+ # if our mountpoints are from stale snapshots,
+ # it doesn't make sense to do a backup.
+ m check-subvol-stale ${mountpoints[@]} || die "found stale mountpoints in ${mountpoints[*]}"
+
+ # for an initial run, btrbk requires the dir to exist.
+ mkdir -p /mnt/{root,o}/btrbk
fi
-# if our mountpoints are from stale snapshots,
-# it doesn't make sense to do a backup.
-check-subvol-stale ${mountpoints[@]} || die "found stale mountpoints in ${mountpoints[*]}"
-
-# for an initial run, btrbk requires the dir to exist.
-mkdir -p /mnt/root/btrbk
local_zone=$(date +%z)
if [[ $source ]]; then
- if ! zone=$(ssh root@$source date +%z); then
- die failed to ssh to root@$source
- fi
- if [[ $zone != "$local_zone" ]]; then
- die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
+ if $fast; then
+ zone=$local_zone
+ else
+ if ! zone=$(ssh root@$source date +%z); then
+ if $conf_only; then
+ echo "$0: warning: failed to ssh to root@$source"
+ else
+ die failed to ssh to root@$source
+ fi
+ fi
+ if [[ $zone != "$local_zone" ]]; then
+ die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
+ fi
fi
-
else
sshable=()
sshfail=()
- min_idle_ms=$((1000 * 60 * 15))
- for h in ${targets[@]}; do
- if remote_info=( $(timeout -s 9 6 ssh root@$h "mkdir -p /mnt/root/btrbk && date +%z && df --output=size,pcent / | tail -n1") ); then
- zone=${remote_info[0]}
- root_size=${remote_info[1]}
- percent_used=${remote_info[2]%%%}
+ remote_str_cmd="mkdir -p /mnt/root/btrbk /mnt/o/btrbk && \
+date +%z && \
+df --output=size,pcent / | tail -n1"
- if (( ${#remote_info[@]} != 3 )); then
- die "error: didnt get 3 fields in test ssh to target $h. investigate"
- fi
-
-
- # we may be booted into a bootstrap fs or something
- min_root_kb=$(( 1024 * 1024 * 200 )) # 200 gb
- if (( root_size < min_root_kb )); then
- continue
+ for h in ${targets[@]}; do
+ if $fast || $conf_only; then
+ # Use some typical values in this case
+ root_size=$(( 1024 * 1024 * 2000 )) #2tb
+ percent_used=10
+ zone=$(date +%z)
+ elif remote_str=$(timeout -s 9 6 ssh root@$h "$remote_str_cmd"); then
+ mapfile -t tmp_array <<<"$remote_str"
+ zone="${tmp_array[0]}"
+ IFS=" " read -r root_size percent_used <<<"${tmp_array[1]}"
+ percent_used=${percent_used%%%}
+
+ tmp=$(( ${#tmp_array[@]} != 2 ))
+ if (( tmp )); then
+ die "error: didnt get 2 lines in test ssh to target $h. investigate"
fi
+ case $percent_used in
+ [0-9]|[1-9][0-9]) : ;;
+ *)
+ die "error: didnt get percent disk use in test ssh to target $h. investigate"
+ ;;
+ esac
+ else
+ sshfail+=($h)
+ continue
+ fi
- if (( percent_used >= 98 )); then
- die "error: filesystem on target $h is $percent_used % full"
- fi
+ # we may be booted into a bootstrap fs or something
+ min_root_kb=$(( 1024 * 1024 * 200 )) # 200 gb
+ tmp=$(( root_size < min_root_kb ))
+ if (( tmp )); then
+ e "warning: $h: root_size=$root_size < 200gb, perhaps it is booted to bootstrap vol. skipping for now"
+ continue
+ fi
- # This is a separate ssh because xprintidle can fail and thats ok.
- if $cron && idle_ms=$(timeout -s 9 6 ssh $h DISPLAY=:0 xprintidle); then
- if (( idle_ms < min_idle_ms )); then
+ tmp=$(( percent_used >= 98 ))
+ if (( tmp )); then
+ die "error: filesystem on target $h is $percent_used % full"
+ fi
- # Ignore this host. i sometimes use a non-main machine for
- # testing or web browsing, knowing that everything will be wiped
- # by the next backup, but I dont want it to happen as Im using
- # it from cronjob.
- e "warning: $h: active X session in the last 15 minutes, skipping for now"
- continue
+ # on sy, xprintidle is resetting every 12 seconds even when not
+ # idle, i dunno why, instead we are checking if the screen is locked,
+ # which is good enough.
+ #
+ # This is a separate ssh because the command can fail and thatis ok.
+ if ! $force; then
+ locked=false
+ if lock_info=$(timeout -s 9 6 ssh $h DISPLAY=:0 xscreensaver-command -time); then
+ if [[ $lock_info != *non-blanked* ]]; then
+ locked=true
fi
+ else
+ locked=true
fi
- sshable+=($h)
- if [[ $zone != "$local_zone" ]]; then
- die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
+ if ! $locked; then
+ # Ignore this host. i sometimes use a non-main machine for
+ # testing or web browsing, knowing that everything will be wiped
+ # by the next backup, but I dont want it to happen as Im using
+ # it from cronjob.
+ e "warning: $h: seems to be actively in use, skipping for now"
+ continue
fi
- else
- sshfail+=($h)
+ fi
+ sshable+=($h)
+ if [[ $zone != "$local_zone" ]]; then
+ die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
fi
done
- if [[ ! ${sshable[*]} ]] || { ! $cron && [[ ${sshfail[*]} ]]; }; then
- die "failed to ssh to hosts: ${sshfail[*]}"
+ if [[ ! ${sshable[*]} ]] || { $force && [[ ${sshfail[*]} ]]; }; then
+ die "see skipped host warning above or sshfail hosts: ${sshfail[*]}"
else
if [[ ${sshfail[*]} ]]; then
ret=1
fi
-cat >/etc/btrbk.conf <<EOF
+cat >/etc/btrbk$conf_suf.conf <<EOF
ssh_identity /q/root/h
#ssh_identity /root/.ssh/home
transaction_syslog local7
# trying this out
-stream_compress zstd
+#stream_compress zstd
# so we only run one at a time
-lockfile /var/lock/btrbk.lock
+lockfile /var/lock/btrbk$conf_suf.lock
# default format of short does not accomidate hourly preservation setting
timestamp_format long-iso
# I could make this different from target_preserve,
# if one disk had less space.
# for now, keeping them equal.
-snapshot_preserve 18h 14d 8w 24m
-snapshot_preserve_min 2h
+snapshot_preserve $std_preserve
+snapshot_preserve_min 6h
snapshot_dir btrbk
-
# so, total backups = ~58
-target_preserve 18h 14d 8w 24m
-target_preserve_min 2h
+target_preserve $std_preserve
+target_preserve_min 6h
+
+# it seems very likely that not doing this could result in clone source not found
+# errors, for example when expiry happens differently on different hosts,
+# also, as btrbk does by default, if a failed send happens, on the next run it
+# will warn about a stray subvolume, but then create a backup of a newer subvol
+# and use an older subvol as the parent.
+incremental_prefs sao:1
# if something fails and it's not obvious, try doing
# btrbk -l debug -v dryrun
EOF
if $incremental_strict; then
- cat >>/etc/btrbk.conf <<EOF
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
incremental strict
EOF
fi
-vol=/mnt/root
+
+# make /q be last
+mp_count=${#mountpoints[@]}
+for (( i=0; i < mp_count - 1 ; i++ )); do
+ if [[ ${mountpoints[i]} == /q ]]; then
+ unset "mountpoints[i]"
+ mountpoints+=(/q)
+ fi
+done
+
+
+
+snap_list_cmds=()
+tg_snaps=()
+declare -A source_snaps
+
for m in ${mountpoints[@]}; do
+ case $m in
+ /o)
+ vol=/mnt/o
+ ;;
+ *)
+ vol=/mnt/root
+ ;;
+ esac
+
sub=${m#/}
+ snap_list_cmds+=("echo $vol/btrbk/$sub.*;")
+
if [[ $source ]]; then
- cat >>/etc/btrbk.conf <<EOF
+ tmp_a=($vol/btrbk/$sub.*)
+ tg_snaps+=("${tmp_a[*]}")
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
volume ssh://$bbksource$vol
subvolume $sub
+EOF
+ qconf
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
target send-receive $vol/btrbk
EOF
- fi
- if (( ${#targets[@]} )); then
- cat >>/etc/btrbk.conf <<EOF
+ else # we have targets
+ for snap in "$vol/btrbk/$sub."*; do
+ source_snaps[$snap]=t
+ done
+
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
volume $vol
subvolume $sub
EOF
+ qconf
for tg in ${targets[@]}; do
# handle ipv6
if [[ $tg == *:* ]]; then
tg="[$tg]"
fi
- cat >>/etc/btrbk.conf <<EOF
+ cat >>/etc/btrbk$conf_suf.conf <<EOF
target send-receive ssh://$tg$vol/btrbk
EOF
done
fi
done
-# if $amy; then
-# # to manually backup amy,
-# # bbk -e -s amy -m root_ubuntubionic
-# cat >>/etc/btrbk.conf <<'EOF'
-# volume ssh://amy/mnt/root
-# subvolume root_ubuntubionic
-# target send-receive /mnt/root/btrbk
-# EOF
-# fi
+# Delete any subvols on the receiving host that don't exist on the
+# sending host. Otherwise, the receiving host could have snapshots that
+# aren't on the sending side, and thus become odd leaf subvols, and then
+# btrbk could try to use them when we sync back, creating a weird tree
+# instead of linear parent/child relationship. Maybe this could lead to
+# a missing source subvol error, so lets avoid it.
+
+get-orphan-tg-snaps() {
+ orphan_tg_snaps=()
+ for (( i=0; i < ${#mountpoints[@]}; i++ )); do
+ orphan_start_count=${#orphan_tg_snaps[@]}
+ tg_snap_count=0
+ for tg_snap in ${tg_snaps[$i]}; do
+ tg_snap_count=$(( tg_snap_count + 1 ))
+ if [[ ! ${source_snaps[$tg_snap]} ]]; then
+ orphan_tg_snaps+=("$tg_snap")
+ fi
+ done
+ orphan_mp_count=$(( ${#orphan_tg_snaps[@]} - orphan_start_count ))
+ # sanity checking
+ tmp=$(( tg_snap_count > 1 && tg_snap_count == orphan_mp_count ))
+ if (( tmp )) ; then
+ die "something went wrong checking orphans on $tg: for mountpoint ${mountpoints[$i]}, $orphan_mp_count"
+ fi
+ done
+}
+
+if [[ $source ]]; then
+ for snap in $(ssh root@$source "shopt -s nullglob; ${snap_list_cmds[*]}"); do
+ source_snaps[$snap]=t
+ done
+ get-orphan-tg-snaps
+ tmp=$(( ${#orphan_tg_snaps[*]} >= 1 ))
+ if (( tmp )); then
+ d btrfs sub del ${orphan_tg_snaps[*]}
+ fi
+else # we have targets
+ for tg in ${targets[@]}; do
+ tmp_str=$(ssh root@$tg "shopt -s nullglob; ${snap_list_cmds[*]}")
+ mapfile -t tg_snaps <<<"$tmp_str"
+ get-orphan-tg-snaps
+ tmp=$(( ${#orphan_tg_snaps[*]} >= 1 ))
+ if (( tmp )); then
+ d ssh root@$tg "btrfs sub del ${orphan_tg_snaps[*]}"
+ fi
+ done
+fi
# todo: umount first to ensure we don't have any errors
# todo: do some kill fuser stuff to make umount more reliable
if $dry_run; then
- m btrbk -v -n $cmd_arg
- mexit 0
-elif [[ $cmd_arg == archive ]]; then
- if [[ $source ]]; then
- m btrbk $verbose_arg $progress_arg $cmd_arg ssh://$source$vol $vol
- else
- for tg in ${targets[@]}; do
- m btrbk $verbose_arg $progress_arg $cmd_arg $vol ssh://$tg$vol
- done
- fi
+ m btrbk -c /etc/btrbk$conf_suf.conf -v -n $cmd_arg
mexit 0
fi
# -q and just using the syslog option seemed nice,
# but it doesn't show when a send has a parent and when it doesn't.
-m btrbk $verbose_arg $progress_arg $cmd_arg
+m btrbk -c /etc/btrbk$conf_suf.conf $preserve_arg $verbose_arg $progress_arg $cmd_arg
+
+if $early; then
+ exit 0
+fi
# todo: tp not valid anymore.
# if we have it, sync to systems which don't
done
fi
+subvols=()
+for mp in "${mountpoints[@]}"; do
+ subvols+=("${mp##*/}")
+done
if [[ $source ]]; then
- m mount-latest-subvol
+ m mount-latest-subvol "${subvols[@]}"
else
- m /a/exe/mount-latest-remote ${targets[@]}
+ for tg in ${targets[@]}; do
+ m /a/exe/mount-latest-remote "$tg" "${subvols[@]}" || ret=$?
+ done
fi
+# todo, we get hostnames earlier, reuse that.
if [[ $ret == 0 ]]; then
for tg in ${targets[@]}; do
- :
- #ssh root@$tg /a/exe/mail-backup-clean
+ h=$(ssh $tg hostname)
+ if [[ $h == kd && $HOSTNAME == x3 && $HOSTNAME == "$MAIL_HOST" ]]; then
+ m ssh root@$tg 'btrbk-spread-wrap &>/dev/null </dev/null &'
+ fi
+ rsync --mkpath -a -f"- */" -f"+ *" /var/log/btrbk/ root@$tg:/var/log/btrbk/$tg
+ cmd=/usr/local/bin/mail-backup-clean
+ ssh root@$tg "if test -x $cmd; then $cmd; fi"
done
+ if [[ $source ]]; then
+ rsync --mkpath -a -f"- */" -f"+ *" $source:/var/log/btrbk/ /var/log/btrbk/$source
+ fi
fi
mexit $ret
iankelling.org / git / distro-setup / blobdiff