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)
+ 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
+ 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) : ;;
+ *)
+ 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)
+ else
+ targets+=(x3wg.b8.nz)
+ fi
+}
+
+add-wireless-target-h() {
+ if ping -q -c1 -w1 $h.b8.nz &>/dev/null; then
+ targets+=($h.b8.nz)
+ elif ping -q -c1 -w1 ${h}w.b8.nz &>/dev/null; then
+ targets+=(${h}w.b8.nz)
+ fi
+}
+
+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
+
+}
+
+
# latest $MAIL_HOST
if [[ -e /b/bash_unpublished/source-state ]]; then
source /b/bash_unpublished/source-state
sleep 5
fi
+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
# switch mail-host, no need to repeat the same checks again.
--fast) fast=true ;;
-i) incremental_strict=true ;;
- # note this implies resume and -p
+ # 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 ;;
cmd_arg="$1"
-uninstalled-file-die() {
- die "uninstalled file $1. run install-my-scripts or rerun with -f"
-}
if ! $force && { $check_installed || [[ ! $source ]]; } ; then
install_bin_files=(
at_home=false
-set-location() {
- case $HOSTNAME in
- kw)
- at_work=true
- ;;
- kd|frodo)
- at_home=true
- ;;
- x2|x3|sy)
- 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
- 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) : ;;
- *)
- 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)
- else
- targets+=(x3wg.b8.nz)
- fi
-}
-
-add-wireless-target-h() {
- if ping -q -c1 -w1 $h.b8.nz &>/dev/null; then
- targets+=($h.b8.nz)
- elif ping -q -c1 -w1 ${h}w.b8.nz &>/dev/null; then
- targets+=(${h}w.b8.nz)
- fi
-}
-
-
# set default targets
if [[ ! -v targets && ! $source ]]; then
exit-if-no-default-targets
*)
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
done
fi
-if (( ! ${#mountpoints[@]} )); then
+tmp=$(( ${#mountpoints[@]} == 0 ))
+if (( tmp )); then
die didnt get mountpoint arg and had no defaults
fi
IFS=" " read -r root_size percent_used <<<"${tmp_array[1]}"
percent_used=${percent_used%%%}
- if (( ${#tmp_array[@]} != 2 )); then
+ tmp=$(( ${#tmp_array[@]} != 2 ))
+ if (( tmp )); then
die "error: didnt get 2 lines in test ssh to target $h. investigate"
fi
case $percent_used in
# we may be booted into a bootstrap fs or something
min_root_kb=$(( 1024 * 1024 * 200 )) # 200 gb
- if (( root_size < min_root_kb )); then
+ tmp=$(( root_size < min_root_kb ))
+ if (( tmp )); then
continue
fi
- if (( percent_used >= 98 )); then
+ tmp=$(( percent_used >= 98 ))
+ if (( tmp )); then
die "error: filesystem on target $h is $percent_used % full"
fi
target_preserve $std_preserve
target_preserve_min 6h
-# i tried this when investigating: clone no source subvolume found error
-#incremental_prefs sro:1 srn:1 sao san:1 aro:1 arn:1
+# 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
fi
-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 $q_preserve
-target_preserve_min 2h
-EOF
- ;;
- esac
-
-}
# make /q be last
mp_count=${#mountpoints[@]}
fi
done
+
+
+snap_list_cmds=()
+tg_snaps=()
+declare -A source_snaps
+
for m in ${mountpoints[@]}; do
case $m in
/o)
esac
sub=${m#/}
+ snap_list_cmds+=("echo $vol/btrbk/$sub.*;")
+
if [[ $source ]]; then
+ tmp_a=($vol/btrbk/$sub.*)
+ tg_snaps+=("${tmp_a[*]}")
cat >>/etc/btrbk$conf_suf.conf <<EOF
volume ssh://$bbksource$vol
subvolume $sub
cat >>/etc/btrbk$conf_suf.conf <<EOF
target send-receive $vol/btrbk
EOF
- fi
- if (( ${#targets[@]} )); then
+ else # we have targets
+ for snap in "$vol/btrbk/$sub."*; do
+ source_snaps[$snap]=t
+ done
+
cat >>/etc/btrbk$conf_suf.conf <<EOF
volume $vol
subvolume $sub
fi
done
+# 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
done
fi
+# todo, we get hostnames earlier, reuse that.
if [[ $ret == 0 ]]; then
for tg in ${targets[@]}; do
h=$(ssh $tg hostname)
if [[ $h == kd && $HOSTNAME == x3 && $HOSTNAME == "$MAIL_HOST" ]]; then
- ssh root$tg systemctl --no-block start btrbk-spread
+ m ssh root@$tg 'btrbk-spread-wrap &>/dev/null </dev/null &'
fi
rsync -a -f"- */" -f"+ *" /var/log/btrbk/ root@$tg:/var/log/btrbk/$tg
ssh root@$tg /usr/local/bin/mail-backup-clean
iankelling.org / git / distro-setup / commitdiff