# todo: if we cancel in the middle of a btrfs send, then run again immediately, the received subvolume doesn't get a Received UUID: field, and we won't mount it. Need to figure out a solution that will fix this.
-set -eE -o pipefail
-trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
-[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
+[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
+
+source /usr/local/lib/err
usage() {
cat <<'EOF'
exit $1
}
-script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))
+rsync-dirs() {
+ local host=$1
+ local path=$2
+ m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
+}
-# note q is owned by root:1000
-# note p/m is owned 1000:1000 and chmod 700
+pre="${0##*/}: "
+m() { if $verbose; then printf "$pre%s\n" "$*"; fi; "$@"; }
+e() { printf "$pre%s\n" "$*"; }
+die() { printf "$pre%s\n" "$*" >&2; exit 1; }
+
+# latest $MAIL_HOST
+if [[ -e /b/bash_unpublished/source-state ]]; then
+ source /b/bash_unpublished/source-state
+fi
+
+# note q is owned by root:1000
mountpoints=()
rate_limit=no
verbose=true; verbose_arg=-v
progress_arg="--progress"
+pull_reexec=false
default_args_file=/etc/btrbk-run.conf
if [[ -s $default_args_file ]]; then
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):"
+ cat $default_args_file
+ sleep 5
fi
-temp=$(getopt -l help cl:m:nps:t:vh "$@") || usage 1
+cron=false
+orig_args=("$@")
+temp=$(getopt -l cron,pull-reexec,help cl:m:npqs:t:vh "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
+ --cron)
+ cron=true
+ pre=
+ shift
+ ;;
# only creates the config file, does not run btrbk
-c) conf_only=true; shift ;;
# bytes per second, suffix k m g
-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 ;;
# source host to receive a backup from
-s) source=$2; shift 2 ;;
-v) verbose=true; verbose_arg=-v; shift ;;
-h|--help) usage ;;
--) shift; break ;;
- *) echo "$0: Internal error!" ; exit 1 ;;
+ *) die "Internal error!" ;;
esac
done
-# usefull commands are resume and archive
+# only tested commands are resume and archive
cmd_arg=${1:-run}
-if [[ -s $default_args_file ]]; then
- echo "$0: warning: default btrbk-run options set in $default_args_file (sleeping 5 seconds):"
- cat $default_args_file
- sleep 5
+case $cmd_arg in
+ run|resume|archive) : ;;
+ *) die "untested command arg" ;;
+esac
+
+if (( $# > 1 )); then
+ die: "only 1 nonoption arg is supported"
fi
if [[ -v targets && $source ]]; then
- echo "$0: error: -t and -s are mutually exclusive" >&2
- exit 1
+ die "error: -t and -s are mutually exclusive"
fi
-echo -e "$0: options: conf_only=$conf_only\ndry_run=$dry_run\nrate_limit=$rate_limit\nverbose=$verbose\ncmd_arg=$cmd_arg"
+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
+
+# TODO: i wonder if there should be an option to send to the default
+# targets, plus any given on the command line.
# set default targets
if [[ ! -v targets && ! $source ]]; then
+ if [[ $HOSTNAME != "$MAIL_HOST" ]] && $cron ; then
+ echo "MAIL_HOST=$MAIL_HOST, nothing to do"
+ exit 0
+ fi
+
+ at_work=false
+
case $HOSTNAME in
- x2|kw)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- targets=($HOME_DOMAIN)
+ kw)
+ at_work=true
+ ;;&
+ x2|x3)
+ if ping -q -c1 -w1 hal.office.fsf.org \
+ && ip n show 192.168.0.26 | grep . &>/dev/null; then
+ at_work=true
+ fi
+ ;;&
+ kw|x2|x3)
+ if $at_work && ping -q -c1 -w1 iank.vpn.office.fsf.org &>/dev/null; then
+ home=iank.vpn.office.fsf.org
+ else
+ home=b8.nz
fi
+ ;;&
+ kw)
+ targets=($home x2)
+ ;;
+ x2|x3)
+ targets=($home kw)
;;
tp)
- targets=(frodo)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- if timeout -s 9 10 ssh x2 :; then
- targets+=(x2)
- fi
+ # kd disabled temporarily while its hot and i plan to work on it.
+ #targets=(frodo kd)
+ targets=(frodo x3.b8.nz)
+ # might not be connected to the vpn
+ if timeout -s 9 10 ssh kw :; then
+ targets+=(kw)
fi
;;
- frodo)
- targets=()
+ kd)
+ targets=(frodo tp)
+ # might not be connected to the vpn
+ if timeout -s 9 10 ssh kw :; then
+ targets+=(kw)
+ fi
;;
*)
- echo "$0: error: no default targets for this host, use -t"
- exit 1
+ die "error: no default targets for this host, use -t"
;;
esac
fi
fi
-
-# set default mountpoints
-case $HOSTNAME in
- # no remote backups atm. note, if we do enable this, configuration below will need some changes.
- # frodo)
- # prospective_mps=(/i)
- # ;;
- *)
- prospective_mps=(/a /q)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- prospective_mps+=(/o)
+if [[ $mountpoints ]]; then
+ for mp in ${mountpoints[@]}; do # default mountpoints to sync
+ if [[ -e /nocow/btrfs-stale/$mp ]]; then
+ die "error: $mp is stale, mount-latest-subvol first"
fi
- ;;
-esac
-case ${targets[0]} in
- kw|kww)
- prospective_mps=(/a)
- ;;
-esac
-
-for mp in ${prospective_mps[@]}; do # default mountpoints to sync
- if [[ -e /nocow/btrfs-stale/$mp ]]; then
- echo "$0: warning: $mp stale, not adding to default mountpoints"
- continue
- fi
- if awk '{print $2}' /etc/fstab | grep -xF $mp &>/dev/null; then
- mountpoints+=($mp)
- fi
-done
+ done
+else
+ # set default mountpoints
+ case $HOSTNAME in
+ # no remote backups atm. note, if we do enable this, configuration below will need some changes.
+ # frodo)
+ # prospective_mps=(/i)
+ # ;;
+ *)
+ prospective_mps=(/a /q)
+ if [[ $source ]]; then
+ source_state="$(ssh $source cat /a/bin/bash_unpublished/source-state)"
+ eval "$source_state"
+ source_host="$(ssh $source cat /etc/hostname)"
+ if [[ $source_host == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ fi
+ else
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ fi
+ fi
+ ;;
+ esac
+ for mp in ${prospective_mps[@]}; do # default mountpoints to sync
+ if [[ -e /nocow/btrfs-stale/$mp ]]; then
+ e "warning: $mp stale, not adding to default mountpoints"
+ continue
+ fi
+ if awk '{print $2}' /etc/fstab | grep -xF $mp &>/dev/null; then
+ mountpoints+=($mp)
+ fi
+ done
+fi
echo "mountpoints: ${mountpoints[*]}"
##### end command line parsing ########
-rsync-dirs() {
- local host=$1
- local path=$2
- m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
-}
+if [[ $source ]]; then
+ if [[ $(ssh $source systemctl is-active btrbk.service) != inactive ]]; then
+ echo "$0: error: cron btrbk is running on source. exiting out of caution"
+ exit 1
+ fi
+fi
+
+# pull_reexec stops us from getting into an infinite loop if there is some
+# kind of weird problem
+pulla=false
+for m in "${mountpoints[@]}"; do
+ if [[ $m == /a ]]; then
+ pulla=true
+ break
+ fi
+done
+if ! $pull_reexec && [[ $source ]] && $pulla ; then
+ tmpf=$(mktemp)
+ scp $source:/a/bin/distro-setup/btrbk-run $tmpf
+ if ! diff -q $tmpf $BASH_SOURCE; then
+ e "found newer version on host $source. reexecing"
+ install -T $tmpf /usr/local/bin/btrbk-run
+ m /usr/local/bin/btrbk-run --pull-reexec "${orig_args[@]}"
+ exit
+ fi
+fi
+
-m() { printf "%s: %s\n" "${0##*/}" "$*"; "$@"; }
if ! which btrbk &>/dev/null; then
- echo "$0: error: no btrbk binary found"
- exit 1
+ die "error: no btrbk binary found"
fi
# if our mountpoints are from stale snapshots,
# it doesn't make sense to do a backup.
-check-subvol-stale ${mountpoints[@]} || exit 1
+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. $h has different timezone than localhost"
+ fi
+
+else
+
+ sshable=()
+ sshfail=()
+ min_idle_ms=$((1000 * 60 * 15))
+ for h in ${targets[@]}; do
+ if zone=$(ssh root@$h "mkdir -p /mnt/root/btrbk && date +%z"); then
+ # This is a separate ssh because xprintidle can fail and thats ok.
+ if $cron && idle_ms=$(ssh $h DISPLAY=:0 xprintidle); then
+ if (( idle_ms < min_idle_ms )); 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: $h: active X session in the last 15 minutes, skipping for now"
+ continue
+ fi
+ fi
+ sshable+=($h)
+ if [[ $zone != $local_zone ]]; then
+ die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
+ fi
+ else
+ sshfail+=($h)
+ fi
+ done
+ if [[ ! ${sshable[@]} ]] || { ! $cron && [[ ${sshfail[@]} ]]; }; then
+ die "failed to ssh to hosts: ${sshfail[*]}"
+ else
+ if [[ ${sshfail[@]} ]]; then
+ ret=1
+ e "error: failed to ssh to ${sshfail[*]} but continuing with other hosts"
+ fi
+ targets=(${sshable[@]})
+ fi
+fi
cat >/etc/btrbk.conf <<EOF
# transaction info.
transaction_syslog local7
-# 20%ish speedup[]
-stream_buffer 512m
+# note, i had this because man said 20% speedup, but ran into
+# this issue, https://github.com/digint/btrbk/issues/275
+#stream_buffer 512m
# so we only run one at a time
lockfile /var/lock/btrbk.lock
-for tg in ${targets[@]:-$HOSTNAME}; do
- # for an initial run, btrbk requires the dir to exist.
- ssh root@$tg mkdir -p /mnt/root/btrbk
-done
-
vol=/mnt/root
if $dry_run; then
m btrbk -v -n $cmd_arg
+ exit 0
elif [[ $cmd_arg == archive ]]; then
if [[ $source ]]; then
m btrbk $verbose_arg $progress_arg $cmd_arg ssh://$source$vol $vol
done
fi
-/a/bin/distro-setup/install-my-scripts
if [[ $source ]]; then
- m mount-latest-subvol
+ m mount-latest-subvol $verbose_arg
else
- m mount-latest-remote ${targets[@]}
+ m /a/exe/mount-latest-remote ${targets[@]}
fi
+exit $ret
+
# todo: move variable data we don't care about backing up
# to /nocow and symlink it.
iankelling.org / git / distro-setup / blobdiff