# 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 $?" >&2' ERR
+err-bash-trace() {
+ local -i argc_index=0 frame i start=${1:-0} max_indent=8 indent
+ local source
+ local extdebug=false
+ if [[ $(shopt -p extdebug) == *-s* ]]; then
+ extdebug=true
+ fi
+ for ((frame=0; frame < ${#FUNCNAME[@]}-1; frame++)); do
+ argc=${BASH_ARGC[frame]}
+ argc_index+=$argc
+ ((frame < start)) && continue
+ if (( ${#BASH_SOURCE[@]} > 1 )); then
+ source="${BASH_SOURCE[frame+1]}:${BASH_LINENO[frame]}:"
+ fi
+ indent=$((frame-start + 1))
+ indent=$((indent < max_indent ? indent : max_indent))
+ printf "%${indent}s↳%sin \`%s" '' "$source" "${FUNCNAME[frame]}"
+ if $extdebug; then
+ for ((i=argc_index-1; i >= argc_index-argc; i--)); do
+ printf " %s" "${BASH_ARGV[i]}"
+ done
+ fi
+ echo \'
+ done
+ return 0
+}
+err-catch() {
+ set -E; shopt -s extdebug
+ _err-trap() {
+ err=$?
+ exec >&2
+ set +x
+ echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $err"
+ err-bash-trace 2
+ set -e # err trap does not work within an error trap
+ "${_errcatch_cleanup[@]:-:}" # note :-: is to be compatible with set -u
+ echo "$0: exiting with code $err"
+ exit $err
+ }
+ trap _err-trap ERR
+ set -o pipefail
+}
+err-catch
+
[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
}
-m() { if $verbose; then printf "$pre%s\n" "$*"; fi; "$@"; }
-die() { printf "$pre%s\n" "$*" >&2; exit 1; }
+pre="${0##*/}:"
+m() { if $verbose; then printf "$pre %s\n" "$*"; fi; "$@"; }
+die() { printf "$pre %s\n" "$*" >&2; exit 1; }
# latest $MAIL_HOST
-if [[ -e /b/bash_unpublished/source-semi-priv ]]; then
- source /b/bash_unpublished/source-semi-priv
+if [[ -e /b/bash_unpublished/source-state ]]; then
+ source /b/bash_unpublished/source-state
fi
# note q is owned by root:1000
default_args_file=/etc/btrbk-run.conf
if [[ -s $default_args_file ]]; then
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 $default_args_file
sleep 5
cron=false
orig_args=("$@")
-temp=$(getopt -l cpull-reexec,help cl:m:npqs:t:vh "$@") || usage 1
+temp=$(getopt -l cron,pull-reexec,help cl:m:npqs:t:vh "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
--cron)
cron=true
- pre="${0##*/}: "
+ pre=
shift
;;
# only creates the config file, does not run btrbk
esac
done
-# usefull commands are resume and archive
+# 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 "$0: options: conf_only=%s\ndry_run=%s\nrate_limit=%s\nverbose=%s\ncmd_arg=%s" "$conf_only" "$dry_run" "$rate_limit" "$verbose" "$cmd_arg"
+ printf "$pre options: conf_only=%s\ndry_run=%s\nrate_limit=%s\nverbose=%s\ncmd_arg=%s" "$conf_only" "$dry_run" "$rate_limit" "$verbose" "$cmd_arg"
fi
### end options parsing
+# 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 && ! $source && $HOSTNAME == $MAIL_HOST ]]; then
+if [[ ! -v targets && ! $source ]]; then
+ if [[ $HOSTNAME != "$MAIL_HOST" ]] && $cron ; then
+ echo "MAIL_HOST=$MAIL_HOST, nothing to do"
+ exit 0
+ fi
case $HOSTNAME in
kw|x2)
if ping -q -c1 -w1 iank.vpn.office.fsf.org &>/dev/null; then
home=iank.vpn.office.fsf.org
else
- home=$HOME_DOMAIN
+ home=b8.nz
fi
;;&
kw)
# ;;
*)
prospective_mps=(/a /q)
- if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
- prospective_mps+=(/o)
+ 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
+ else
+ if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
+ prospective_mps+=(/o)
+ fi
fi
;;
esac
for mp in ${prospective_mps[@]}; do # default mountpoints to sync
if [[ -e /nocow/btrfs-stale/$mp ]]; then
- echo "$0: warning: $mp stale, not adding to default mountpoints"
+ echo "$pre warning: $mp stale, not adding to default mountpoints"
continue
fi
if awk '{print $2}' /etc/fstab | grep -xF $mp &>/dev/null; then
echo "mountpoints: ${mountpoints[*]}"
+##### end command line parsing ########
+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
break
fi
done
-if ! $pull_reexec && [[ $source ]] && ! $pulla ; then
+if ! $pull_reexec && [[ $source ]] && $pulla ; then
tmpf=$(mktemp)
scp $source:/a/bin/distro-setup/btrbk-run $tmpf
if ! diff -q $tmpf $BASH_SOURCE; then
- echo "$0: found newer version on host $source. reexecing"
+ echo "$pre 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
-##### end command line parsing ########
# 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
+ if $cron && DISPLAY=:0 xprintidle; then
+ # This is a separate ssh because xprintidle can fail and thats ok.
+ # Ignore this host. i sometimes use a non-main machine for testing or web browsing, knowing that
+ # everything will be wiped by the next backup, but I dont want it to happen as Im using
+ # it from cronjob.
+ continue
+ fi
+ sshable+=($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 [[ $sshfail ]]; then
+ ret=1
+ echo "$pre 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
-# for an initial run, btrbk requires the dir to exist.
-mkdir -p /mnt/root/btrbk
-local_zone=$(date +%z)
-for h in ${targets[@]} $source; do
- cmd="ssh root@$h mkdir -p /mnt/root/btrbk && date +%z"
- if ! zone=$($cmd); then
- die "error running: $cmd"
- fi
- if [[ $zone != $local_zone ]]; then
- die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
- fi
-done
-
vol=/mnt/root
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