X-Git-Url: https://iankelling.org/git/?p=distro-setup;a=blobdiff_plain;f=btrbk-run;h=6908018f61fbafda774339f4f299699e479a388b;hp=759b3a4782ae32407c86e5a5e5ba745a589d10f4;hb=8a6b446c7e336596af614c853e1c6177e55a7983;hpb=f0a8c08295ff71bfc9a87231d06a5c0ecf3ec601

diff --git a/btrbk-run b/btrbk-run
old mode 100755
new mode 100644
index 759b3a4..6908018
--- a/btrbk-run
+++ b/btrbk-run
@@ -13,74 +13,280 @@
 # 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"))
+rsync-dirs() {
+  local host=$1
+  local path=$2
+  m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
+}
+
+
+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
+fi
+
+# note q is owned by root:1000
+
+mountpoints=()
 
-# todo: finish figuring out fai / distro-setup
-# initial fstab / subvol setup.
+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 -- $(< $default_args_file) "$@"
+  # 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=$(getopt -l help hcnprt: "$@") || usage 1
+pre="${0##*/}:"
+cron=false
+orig_args=("$@")
+temp=$(getopt -l cron,pull-reexec,help cl:m:npqs:t:vh "$@") || usage 1
 eval set -- "$temp"
 while true; do
-    case $1 in
-        -c) conf_only=true; shift ;;
-        -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); unset IFS; shift 2 ;;
-        -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=($2); unset IFS; shift 2 ;;
+    -v) verbose=true; verbose_arg=-v; shift ;;
+    -h|--help) usage ;;
+    --) shift; break ;;
+    *) die "Internal error!" ;;
+  esac
 done
-read primary <<<"$@"
 
-##### end command line parsing ########
+# usefull commands are resume and archive
+cmd_arg=${1:-run}
 
-rsync-dirs() {
-    local host=$1
-    local path=$2
-    m rsync $dry_run_arg -ahi --relative --delete "$path" "root@$host:/"
-}
+if [[ -v targets && $source ]]; then
+  die "error: -t and -s are mutually exclusive"
+fi
+
+if $verbose; then
+  printf "$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 ]]; then
+  if [[ $HOSTNAME != "$MAIL_HOST" ]] && $cron ; then
+    echo "We are not 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
+      fi
+      ;;&
+    kw)
+      targets=($home x2)
+      ;;
+    x2)
+      targets=($home kw)
+      ;;
+    tp)
+      targets=(frodo kd)
+      # 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
+
+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
+      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 [[ $HOSTNAME == "$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 "$pre 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: ${mountpoints[*]}"
+
+
+
+# pull_reexec stops us from getting into an infinite loop if there is some
+# kind of weird problem
+pulla=false
+for m in "${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 $BASH_SOURCE; then
+    echo "$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
+fi
+
+
+##### end command line parsing ########
 
-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
+      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/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.
@@ -89,6 +295,10 @@ ssh_identity /root/.ssh/id_rsa
 # 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
 
@@ -110,115 +320,87 @@ 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=(/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
-
-if [[ ! $targets ]]; then
-    case $HOSTNAME in
-        tp|x2)
-            if ! timeout -s 9 10 ssh frodo :; then
-                targets=($HOME_DOMAIN)
-            fi
-            ;;
-        treetowl)
-            targets=(frodo)
-            if timeout -s 9 10 ssh x2 :; then
-                targets+=(x2)
-            fi
-            ;;
-        *)
-            targets=(frodo)
-            ;;
-    esac
-    echo "targets: ${targets[*]}"
-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
+  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
+# -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
 
-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.