# See the License for the specific language governing permissions and
# limitations under the License.
-set -eE -o pipefail
-trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
-[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
+# 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.
+
+
+[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
+
+source /usr/local/lib/err
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"))
+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=()
rsync_mountpoint=/q
+# default options
conf_only=false
dry_run=false # mostly for testing
-resume_arg=
rate_limit=no
-verbose=false
+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 -- $(< $default_args_file) "$@"
+ 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:nprt: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
- # 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
+ --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
+ -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 ;;
+ *) die "Internal error!" ;;
+ esac
done
-if [[ -s $default_args_file ]]; then
- echo "$0: warning: default btrbk-run options set in $default_args_file (sleeping 5 seconds):"
- cat $default_args_file
- sleep 5
+# only tested commands are resume and archive
+cmd_arg=${1:-run}
+
+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
+ die "error: -t and -s are mutually exclusive"
+fi
+
+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
-echo -e "$0: options: conf_only=$conf_only\ndry_run=$dry_run\nresume_arg=$resume_arg\nrate_limit=$rate_limit\nverbose=$verbose"
+# 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 ]]; then
- case $HOSTNAME in
- x2)
- 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
+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
+ 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)
+ # 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
+ ;;
+ kd)
+ targets=(frodo tp)
+ # might not be connected to the vpn
+ if timeout -s 9 10 ssh kw :; then
+ targets+=(kw)
+ fi
+ ;;
+ *)
+ die "error: no default targets for this host, use -t"
+ ;;
+ esac
fi
-echo "targets: ${targets[*]}"
+if [[ -v targets ]]; then
+ echo "targets: ${targets[*]}"
+fi
+if [[ $source ]]; then
+ echo "source: $source"
+fi
-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
+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
+ 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
- done
-else # set default mountpoints
- if [[ $HOSTNAME == frodo ]]; then
- prospective_mps=(/i)
- else
- prospective_mps=(/a /q)
+ else
if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- prospective_mps+=(/o)
+ 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
- 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
+ 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
+
+
-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$vol/btrbk
-EOF
-}
-m() { printf "%s: %s\n" "${0##*/}" "$*"; "$@"; }
if ! which btrbk &>/dev/null; then
- echo "$0: error: no btrbk binary found"
+ 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[@]} || 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
ssh_identity /root/.ssh/home
# Just a guess that local7 is a good facility to pick.
# transaction info.
transaction_syslog local7
+# 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
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
-done
+vol=/mnt/root
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 ${targets[@]}; do
- tg-conf
- done
- fi
+ sub=${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 ${targets[@]}; do
+ cat >>/etc/btrbk.conf <<EOF
+target send-receive ssh://$tg$vol/btrbk
+EOF
+ done
+ fi
done
if $conf_only; then
- exit
+ exit
fi
+
+
if $dry_run; then
- 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
+ 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
+ m btrbk $verbose_arg $progress_arg $cmd_arg $vol ssh://$tg$vol
+ done
+ fi
+ exit 0
fi
+# -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
- 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
+ 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[@]}
+if [[ $source ]]; then
+ m mount-latest-subvol $verbose_arg
+else
+ 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