X-Git-Url: https://iankelling.org/git/?p=distro-setup;a=blobdiff_plain;f=btrbk-run;h=10bd6382c65df24a4ec1efe35a45270e70ad9005;hp=469b1b391afaa73a6b73235a17810b926851484b;hb=79b274fcd8bfa556133ab13270e84b40aebe8468;hpb=93db0c16393fe75efef3167c1d2b332f50387c23 diff --git a/btrbk-run b/btrbk-run index 469b1b3..10bd638 100644 --- a/btrbk-run +++ b/btrbk-run @@ -16,11 +16,10 @@ # 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" "$@" +[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@" +source /usr/local/lib/err usage() { cat <<'EOF' @@ -43,12 +42,14 @@ rsync-dirs() { } +pre="${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-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 @@ -68,6 +69,7 @@ pull_reexec=false 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 $default_args_file sleep 5 @@ -75,13 +77,13 @@ fi cron=false orig_args=("$@") -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 @@ -106,37 +108,66 @@ while true; do 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 "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 + + at_work=false + case $HOSTNAME in - kw|x2) - if ping -q -c1 -w1 iank.vpn.office.fsf.org &>/dev/null; then + 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 $at_work && ping -q -c1 -w1 iank.vpn.office.fsf.org &>/dev/null; then home=iank.vpn.office.fsf.org else - home=$HOME_DOMAIN + home=b8.nz fi ;;& kw) targets=($home x2) ;; - x2) + x2|x3) targets=($home kw) ;; tp) - targets=(frodo kd) + # 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) @@ -179,14 +210,23 @@ else # ;; *) 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" + e "warning: $mp stale, not adding to default mountpoints" continue fi if awk '{print $2}' /etc/fstab | grep -xF $mp &>/dev/null; then @@ -197,7 +237,14 @@ fi echo "mountpoints: ${mountpoints[*]}" +##### end command line parsing ######## +if [[ $source ]]; then + if [[ $(ssh $source systemctl is-active btrbk.service) != inactive ]]; then + echo "$0: error: cron btrbk is running on source. exiting out of caution" + exit 1 + fi +fi # pull_reexec stops us from getting into an infinite loop if there is some # kind of weird problem @@ -208,11 +255,11 @@ for m in "${mountpoints[@]}"; do 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" + 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 @@ -220,7 +267,6 @@ if ! $pull_reexec && [[ $source ]] && ! $pulla ; then fi -##### end command line parsing ######## @@ -231,6 +277,56 @@ fi # 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 <