# See the License for the specific language governing permissions and
# limitations under the License.
+
+# todo: remove old leaf subvols, like keep up to 1 month or something.
+
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' "$0"
script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))
-# todo: finish figuring out fai / distro-setup
-# initial fstab / subvol setup.
+# note q is owned by root:1000
+# note p/m is owned 1000:1000 and chmod 700
+
+
+mountpoints=()
+
+rsync_mountpoint=/q
conf_only=false
dry_run=false # mostly for testing
resume_arg=
+rate_limit=no
+verbose=false
-temp=$(getopt -l help hcnrt: "$@") || usage 1
+default_args_file=/etc/btrbk-run.conf
+if [[ -s $default_args_file ]]; then
+ 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 ;;
- -t) IFS=, targets=($2); shift 2 ;;
+ # 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 "$0: Internal error!" ; exit 1 ;;
esac
done
-read primary <<<"$@"
+
+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
+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|fz)
+ 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
+
+echo "mountpoints: ${mountpoints[*]}"
##### end command line parsing ########
rsync-dirs() {
local host=$1
local path=$2
- rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
+ m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
}
vol-conf() {
target send-receive ssh://$tg$vol/btrbk
EOF
}
-
+m() { printf "%s: %s\n" "${0##*/}" "$*"; "$@"; }
if ! which btrbk &>/dev/null; then
echo "$0: error: no btrbk binary found"
fi
-cat >/etc/btrbk.conf <<'EOF'
-ssh_identity /root/.ssh/id_rsa
+cat >/etc/btrbk.conf <<EOF
+ssh_identity /root/.ssh/home
+# Just a guess that local7 is a good facility to pick.
+# It's a bit odd that the transaction log has to be logged to
+# a file or syslog, while other output is sent to std out.
+# The man does not mention a way for them to be together, but
+# I dunno if setting a log level like warn might also output
+# transaction info.
+transaction_syslog local7
# so we only run one at a time
lockfile /var/lock/btrbk.lock
# only make a snapshot if things have changed
snapshot_create onchange
-# much less snapshots because I have less space on the
-# local filesystem.
-#snapshot_preserve 2h 2d
-# for now, keeping them equal for simplicity sake
-snapshot_preserve 48h 14d 8w 24m
-snapshot_preserve_min 6h
+# I could make this different from target_preserve,
+# if one disk had less space.
+# for now, keeping them equal.
+snapshot_preserve 36h 14d 8w 24m
+snapshot_preserve_min 4h
snapshot_dir btrbk
# so, total backups = ~89
-target_preserve 48h 14d 8w 24m
-target_preserve_min 6h
+target_preserve 36h 14d 8w 24m
+target_preserve_min 4h
# if something fails and it's not obvious, try doing
# btrbk -l debug -v dryrun
+
+rate_limit $rate_limit
EOF
-# note q is owned by root:1000
-# note p is owned 1000:1000 and chmod 700
-mountpoints=(/q)
-if awk '{print $2}' /etc/fstab | grep -xF /p &>/dev/null; then
- mountpoints+=(/p)
-fi
# if our mountpoints are from stale snapshots,
# it doesn't make sense to do a backup.
check-subvol-stale ${mountpoints[@]} || exit 1
-if [[ ! $targets ]]; then
- case $HOSTNAME in
- tp|x2)
- if ! timeout -s 9 10 ssh frodo :; then
- targets=($HOME_DOMAIN)
- fi
- ;;
- esac
- targets=(frodo)
-fi
-
-
-# for i, we just do a 1 way sync from master to backup,
-# and manually manage any changes to that.
-do_i=false
for tg in ${targets[@]}; do
# for an initial run, btrbk requires the dir to exist
ssh root@$tg mkdir -p /mnt/root/btrbk
- if [[ $tg == frodo && $HOSTNAME == treetowl ]]; then
- do_i=true
- fi
done
-vol=/mnt/root
-vol-conf
for m in ${mountpoints[@]}; do
- sub=${m##*/}
- sub-conf
- for tg in ${targets[@]}; do
+ # for /i, some special cases. there is just one static target and direction.
+ if [[ $m == /i ]]; then
+ vol=/mnt/iroot
+ vol-conf
+ sub=i
+ sub-conf
+ tg=frodo
+ vol=/mnt/root
tg-conf
- done
+ else
+ vol=/mnt/root
+ vol-conf
+ sub=${m##*/}
+ sub-conf
+ for tg in ${targets[@]}; do
+ tg-conf
+ done
+ fi
done
-if $do_i; then
- vol=/mnt/iroot
- vol-conf
- sub=i
- sub-conf
- tg=frodo
- vol=/mnt/root
- tg-conf
-fi
-
-
# todo: umount first to ensure we don't have any errors
# todo: do some kill fuser stuff to make umount more reliable
-# todo: run this on a systemd timer on $primary, once per hour,
-# and if primary is, change that timer over to primary, and make
-# sure we mount the latest
-
if $conf_only; then
fi
if $dry_run; then
- btrbk -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.
- btrbk $resume_arg run
+ m btrbk $verbose_arg $progress_arg $resume_arg run
fi
-# if we have /p, rsync to targets without /p
-if mountpoint /p >/dev/null; then
+# 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)
fi
if ! $dry_run; then
- $script_dir/mount-latest-remote ${targets[@]}
+ m $script_dir/mount-latest-remote ${targets[@]}
fi
iankelling.org / git / distro-setup / blobdiff