# todo: remove old leaf subvols, like keep up to 1 month or something.
+# 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" "$@"
usage() {
- echo "top of script file:"
- sed -n '1,/^[# ]*end command line/{p;b};q' "$0"
- exit $1
+ echo "top of script file:"
+ sed -n '1,/^[# ]*end command line/{p;b};q' "$0"
+ exit $1
}
script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))
default_args_file=/etc/btrbk-run.conf
if [[ -s $default_args_file ]]; then
- set -- $(< $default_args_file) "$@"
+ set -- $(< $default_args_file) "$@"
fi
temp=$(getopt -l help cl:m:nprt:vh "$@") || usage 1
eval set -- "$temp"
while true; do
- case $1 in
- # only creates the config file, does not run btrbk
- -c) conf_only=true; shift ;;
- -l) rate_limit=$2; shift 2 ;;
- -m) IFS=, mountpoints=($2); unset IFS; shift 2 ;;
- -n) dry_run=true; dry_run_arg=-n; shift ;;
- -p) progress_arg="--progress"; shift ;;
- # btrbk arg: Resume only. Skips snapshot creation.
- -r) resume_arg=-r; shift ;;
- # 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 ;;
- -h|--help) usage ;;
- --) shift; break ;;
- *) echo "$0: Internal error!" ; exit 1 ;;
- esac
+ case $1 in
+ # only creates the config file, does not run btrbk
+ -c) conf_only=true; shift ;;
+ -l) rate_limit=$2; shift 2 ;;
+ -m) IFS=, mountpoints=($2); unset IFS; shift 2 ;;
+ -n) dry_run=true; dry_run_arg=-n; shift ;;
+ -p) progress_arg="--progress"; shift ;;
+ # btrbk arg: Resume only. Skips snapshot creation.
+ -r) resume_arg=-r; shift ;;
+ # 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 ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error!" ; exit 1 ;;
+ esac
done
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
+ echo "$0: warning: default btrbk-run options set in $default_args_file (sleeping 5 seconds):"
+ cat $default_args_file
+ sleep 5
fi
echo -e "$0: options: conf_only=$conf_only\ndry_run=$dry_run\nresume_arg=$resume_arg\nrate_limit=$rate_limit\nverbose=$verbose"
# set default targets
if [[ ! -v targets ]]; then
- case $HOSTNAME in
- x2|kw)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- targets=($HOME_DOMAIN)
- fi
- ;;
- tp)
- targets=(frodo)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- if timeout -s 9 10 ssh x2 :; then
- targets+=(x2)
- fi
- fi
- ;;
- frodo)
- targets=()
- ;;
- *)
- echo "$0: error: no default targets for this host, use -t"
- exit 1
- ;;
- esac
+ case $HOSTNAME in
+ x2|kw)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ targets=($HOME_DOMAIN)
+ fi
+ ;;
+ tp)
+ targets=(frodo)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ if timeout -s 9 10 ssh x2 :; then
+ targets+=(x2)
+ fi
+ fi
+ ;;
+ frodo)
+ targets=()
+ ;;
+ *)
+ echo "$0: error: no default targets for this host, use -t"
+ exit 1
+ ;;
+ esac
fi
echo "targets: ${targets[*]}"
-if (( ${#mountpoints[@]} )); then
- for mp in ${mountpoints[@]}; do
- if [[ -e /nocow/btrfs-stale/$mp ]]; then
- echo "$0: warning: $mp stale. Sleeping for 3 seconds in case you want to cancel."
- sleep 3
- fi
- done
-else # set default mountpoints
- case $HOSTNAME in
- frodo)
- prospective_mps=(/i)
- ;;
- *)
- prospective_mps=(/a /q)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- prospective_mps+=(/o)
- 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
-fi
+# set default mountpoints
+case $HOSTNAME in
+ frodo)
+ prospective_mps=(/i)
+ ;;
+ *)
+ prospective_mps=(/a /q)
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ 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
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:/"
+ local host=$1
+ local path=$2
+ m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
}
vol-conf() {
- cat >>/etc/btrbk.conf <<EOF
+ cat >>/etc/btrbk.conf <<EOF
volume $vol
EOF
}
sub-conf() {
- cat >>/etc/btrbk.conf <<EOF
+ cat >>/etc/btrbk.conf <<EOF
subvolume $sub
EOF
}
tg-conf() {
- cat >>/etc/btrbk.conf <<EOF
+ cat >>/etc/btrbk.conf <<EOF
target send-receive ssh://$tg$vol/btrbk
EOF
}
if ! which btrbk &>/dev/null; then
- echo "$0: error: no btrbk binary found"
+ echo "$0: error: no btrbk binary found"
+ exit 1
fi
+# if our mountpoints are from stale snapshots,
+# it doesn't make sense to do a backup.
+check-subvol-stale ${mountpoints[@]} || exit 1
+
cat >/etc/btrbk.conf <<EOF
ssh_identity /root/.ssh/home
# transaction info.
transaction_syslog local7
+# 20%ish speedup[]
+stream_buffer 512m
+
# so we only run one at a time
lockfile /var/lock/btrbk.lock
EOF
-# if our mountpoints are from stale snapshots,
-# it doesn't make sense to do a backup.
-check-subvol-stale ${mountpoints[@]} || exit 1
for tg in ${targets[@]}; do
- # for an initial run, btrbk requires the dir to exist
- ssh root@$tg mkdir -p /mnt/root/btrbk
+ # for an initial run, btrbk requires the dir to exist.
+ # also use this opportunity to kill emacs, because it doesn't
+ # notice that the file has changed out from underneath it
+ ssh root@$tg mkdir -p /mnt/root/btrbk
done
for m in ${mountpoints[@]}; do
- # for /i, some special cases. there is just one static target and direction.
- if [[ $m == /i ]]; then
- vol=/mnt/iroot
- vol-conf
- sub=i
- sub-conf
- tg=frodo
- vol=/mnt/root
- tg-conf
- else
- vol=/mnt/root
- vol-conf
- sub=${m##*/}
- sub-conf
- for tg in ${targets[@]}; do
- tg-conf
- done
- fi
+ # for /i, some special cases. there is just one static target and direction.
+ if [[ $m == /i ]]; then
+ vol=/mnt/iroot
+ vol-conf
+ sub=i
+ sub-conf
+ tg=frodo
+ vol=/mnt/root
+ tg-conf
+ else
+ vol=/mnt/root
+ vol-conf
+ sub=${m##*/}
+ sub-conf
+ for tg in ${targets[@]}; do
+ tg-conf
+ done
+ fi
done
if $conf_only; then
- exit
+ exit
fi
if $dry_run; then
- m btrbk -v -n $resume_arg run
+ m btrbk -v -n $resume_arg run
else
- # -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 $resume_arg run
+ # -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 $resume_arg run
fi
# if we have it, sync to systems which don't
if mountpoint $rsync_mountpoint >/dev/null; then
- for tg in ${targets[@]}; do
- case $tg in
- tp|li|lk)
- for x in /p/c/machine_specific/*.hosts; do
- if grep -qxF $tg $x; then
- dir=${x%.hosts}
- rsync-dirs $tg $dir
- fi
- done
- ;;
- esac
- done
+ for tg in ${targets[@]}; do
+ case $tg in
+ tp|li|lk)
+ for x in /p/c/machine_specific/*.hosts; do
+ if grep -qxF $tg $x; then
+ dir=${x%.hosts}
+ rsync-dirs $tg $dir
+ fi
+ done
+ ;;
+ esac
+ done
fi
if ! $dry_run; then
- m $script_dir/mount-latest-remote ${targets[@]}
+ m $script_dir/mount-latest-remote ${targets[@]}
fi
iankelling.org / git / distro-setup / blobdiff