# See the License for the specific language governing permissions and
# limitations under the License.
+
+# 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
+ cat <<'EOF'
+btrbk-run [OPTIONS]
+usually -t TARGET_HOST or -s SOURCE_HOST
+
+Note, at source location, intentionally not executable, run and read
+install-my-scripts.
+
+EOF
+ echo "top of script file:"
+ sed -n '1,/^[# ]*end command line/{p;b};q' "$0"
+ exit $1
}
-script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))
+# latest $MAIL_HOST
+if [[ -e /b/bash_unpublished/source-semi-priv ]]; then
+ source /b/bash_unpublished/source-semi-priv
+fi
+
+# note q is owned by root:1000
-# todo: finish figuring out fai / distro-setup
-# initial fstab / subvol setup.
+mountpoints=()
+rsync_mountpoint=/q
+
+# default options
conf_only=false
dry_run=false # mostly for testing
-resume_arg=
+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 -- $(< $default_args_file) "$@"
+ 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 hcnrt: "$@") || usage 1
+orig_args=("$@")
+temp=$(getopt -l pull-reexec,help cl:m:nps:t:vh "$@") || usage 1
eval set -- "$temp"
while true; do
- case $1 in
- -c) conf_only=true; shift ;;
- -n) dry_run=true; dry_run_arg=-n; shift ;;
- # btrbk arg: Resume only. Skips snapshot creation.
- -r) resume_arg=-r; shift ;;
- -t) IFS=, targets=($2); shift 2 ;;
- -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 ;;
+ # bytes per second, suffix k m g
+ -l) rate_limit=$2; shift 2 ;;
+ # 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 ;;
+ # source host to receive a backup from
+ -s) source=$2; shift 2 ;;
+ # 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 ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error!" ; exit 1 ;;
+ esac
done
-read primary <<<"$@"
+
+# usefull commands are resume and archive
+cmd_arg=${1:-run}
+
+if [[ -v targets && $source ]]; then
+ echo "$0: error: -t and -s are mutually exclusive" >&2
+ exit 1
+fi
+
+# pull_reexec stops us from getting into an infinite loop if there is some
+# kind of weird problem
+if ! $pull_reexec && [[ $source ]]; then
+ tmpf=$(mktemp)
+ scp $source:/a/bin/distro-setup/btrbk-run $tmpf
+ if diff -q $tmpf $BASH_SOURCE; then
+ echo "$0: found newer version on host $source. reexecing"
+ install -T $tmpf /usr/local/bin/btrbk-run
+ /usr/local/bin/btrbk-run --pull-reexec "${orig_args[@]}"
+ fi
+fi
+
+
+echo -e "$0: options: conf_only=$conf_only\ndry_run=$dry_run\nrate_limit=$rate_limit\nverbose=$verbose\ncmd_arg=$cmd_arg"
+### end options parsing
+
+
+# set default targets
+if [[ ! -v targets && ! $source ]]; 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
+fi
+
+if [[ -v targets ]]; then
+ echo "targets: ${targets[*]}"
+fi
+
+if [[ $source ]]; then
+ echo "source: $source"
+fi
+
+
+if [[ $mountpoints ]]; then
+ for mp in ${mountpoints[@]}; do # default mountpoints to sync
+ if [[ -e /nocow/btrfs-stale/$mp ]]; then
+ echo "$0: error: $mp is stale, mount-latest-subvol first"
+ exit 1
+ fi
+ 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 [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ fi
+ ;;
+ 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
- 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
-volume $vol
-EOF
-}
-sub-conf() {
- cat >>/etc/btrbk.conf <<EOF
-subvolume $sub
-EOF
-}
-tg-conf() {
- cat >>/etc/btrbk.conf <<EOF
-target send-receive ssh://$tg$vol/btrbk
-EOF
-}
-m() { printf "%s\n" "$*"; "$@"; }
+
+m() { printf "%s: %s\n" "${0##*/}" "$*"; "$@"; }
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
-if [[ $- == *i* ]]; then
- progress_arg=--progress
-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.
# transaction info.
transaction_syslog local7
+# 20%ish speedup[]
+stream_buffer 512m
+
# 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
-EOF
-# note q is owned by root:1000
-# note p is owned 1000:1000 and chmod 700
-mountpoints=(/a)
-qmnt=/q
-if awk '{print $2}' /etc/fstab | grep -xF $qmnt &>/dev/null; then
- mountpoints+=($qmnt)
-fi
-
-# if our mountpoints are from stale snapshots,
-# it doesn't make sense to do a backup.
-check-subvol-stale ${mountpoints[@]} || exit 1
+rate_limit $rate_limit
+EOF
-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
+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
-vol-conf
for m in ${mountpoints[@]}; do
- sub=${m##*/}
- sub-conf
+ sub=${m##*/}
+ if [[ $source ]]; then
+ cat >>/etc/btrbk.conf <<EOF
+volume ssh://$source$vol
+subvolume $sub
+target send-receive $vol/btrbk
+EOF
+ else
+ cat >>/etc/btrbk.conf <<EOF
+volume $vol
+subvolume $sub
+EOF
for tg in ${targets[@]}; do
- tg-conf
+ cat >>/etc/btrbk.conf <<EOF
+target send-receive ssh://$tg$vol/btrbk
+EOF
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
- exit
+ exit
fi
-if $dry_run; then
- m btrbk -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 $progress_arg $resume_arg run
-fi
-# if we have /p, rsync to targets without /p
-if mountpoint /p >/dev/null; then
+
+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
+ else
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
+ m btrbk $verbose_arg $progress_arg $cmd_arg $vol ssh://$tg$vol
done
+ fi
+ exit 0
fi
-
-if ! $dry_run; then
- m $script_dir/mount-latest-remote ${targets[@]}
+# -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
+
+# 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
+ 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
+/a/bin/distro-setup/install-my-scripts
+if [[ $source ]]; then
+ m mount-latest-subvol
+else
+ m /a/exe/mount-latest-remote ${targets[@]}
+fi
# todo: move variable data we don't care about backing up
# to /nocow and symlink it.
iankelling.org / git / distro-setup / blobdiff