X-Git-Url: https://iankelling.org/git/?p=distro-setup;a=blobdiff_plain;f=btrbk-run;h=dcca4b7dd036dca6fb662f40e9904a824160e6bd;hp=50e64b811f0809d2a9a09161534f5750d2e1b46a;hb=72c18f3a6a7f1ed0ca16af654a1f804ab96e1ff9;hpb=3c7dab4936f011bb91f42f7ccb1f8432b94ea040

diff --git a/btrbk-run b/btrbk-run
index 50e64b8..dcca4b7 100644
--- a/btrbk-run
+++ b/btrbk-run
@@ -77,6 +77,7 @@ pull_reexec=false
 
 default_args_file=/etc/btrbk-run.conf
 if [[ -s $default_args_file ]]; then
+  # shellcheck disable=SC2046 # we want word splitting
   set -- $(< $default_args_file) "$@"
   # i havent used this feature yet, so warn about it
   echo "$0: warning: default btrbk-run options set in $default_args_file (sleeping 5 seconds):"
@@ -87,8 +88,9 @@ fi
 targets=()
 early=false
 cron=false
+fast=false
 orig_args=("$@")
-temp=$(getopt -l cron,pull-reexec,help 23ceil:m:npqrs:t:vh "$@") || usage 1
+temp=$(getopt -l cron,fast,pull-reexec,help 23ceil:m:npqrs:t:vh "$@") || usage 1
 eval set -- "$temp"
 while true; do
   case $1 in
@@ -107,6 +109,9 @@ while true; do
     -c) conf_only=true ;;
     # quit early, just btrbk, no extra remounting etc.
     -e) early=true ;;
+    # skip various checks. when we run twice in a row for
+    # switch mail-host, no need to repeat the same checks again.
+    --fast) fast=true ;;
     -i) incremental_strict=true ;;
     # bytes per second, suffix k m g
     -l) rate_limit=$2; shift ;;
@@ -202,8 +207,25 @@ kd_spread=false
 if [[ ! -v targets && ! $source ]]; then
   if $cron; then
     if [[ $HOSTNAME != "$MAIL_HOST" ]]; then
-      if [[ $HOSTNAME == kd && $MAIL_HOST = x2 ]]; then
-        kd_spread=true
+      if [[ $HOSTNAME == kd && $MAIL_HOST == x3 ]]; then
+        if ping -q -c1 -w1 x3.office.fsf.org &>/dev/null; then
+          work_host=x3.office.fsf.org
+        elif ping -q -c1 -w1 x3wg.b8.nz &>/dev/null; then
+          work_host=x3wg.b8.nz
+        fi
+        if [[ $work_host ]]; then
+          source_state="$(ssh $work_host cat /a/bin/bash_unpublished/source-state)"
+          eval "$source_state"
+          if [[ $MAIL_HOST == x3 ]]; then
+            kd_spread=true
+          else
+            echo "MAIL_HOST=$MAIL_HOST, nothing to do"
+            mexit 0
+          fi
+        else
+          echo "MAIL_HOST=$MAIL_HOST, nothing to do"
+          mexit 0
+        fi
       else
         echo "MAIL_HOST=$MAIL_HOST, nothing to do"
         mexit 0
@@ -211,9 +233,6 @@ if [[ ! -v targets && ! $source ]]; then
     fi
   fi
 
-  # x2 at home atm
-  kd_spread=false
-
   at_work=false
   at_home=false
 
@@ -242,11 +261,13 @@ if [[ ! -v targets && ! $source ]]; then
       ;;&
     *)
       if $at_home; then
-        # main work machine
-        if ping -q -c1 -w1 x3.office.fsf.org &>/dev/null; then
-          targets+=(x3.office.fsf.org)
-        else
-          targets+=(x3wg.b8.nz)
+        if ! $kd_spread; then
+          # main work machine
+          if ping -q -c1 -w1 x3.office.fsf.org &>/dev/null; then
+            targets+=(x3.office.fsf.org)
+          else
+            targets+=(x3wg.b8.nz)
+          fi
         fi
         for h in frodo kd; do
           if [[ $HOSTNAME == "$h" ]]; then
@@ -345,7 +366,7 @@ echo "mountpoints: ${mountpoints[*]}"
 
 ##### end command line parsing ########
 
-if [[ $source ]]; then
+if ! $fast && [[ $source ]]; then
   if [[ $(ssh $source ps --no-headers -o comm 1) == systemd ]]; then
     status=$(ssh $source systemctl is-active btrbk.service) || : # normally returns 3
     case $status in
@@ -383,33 +404,46 @@ fi
 if ! command -v btrbk &>/dev/null; then
   die "error: no btrbk binary found"
 fi
-# if our mountpoints are from stale snapshots,
-# it doesn't make sense to do a backup.
-m check-subvol-stale ${mountpoints[@]} || die "found stale mountpoints in ${mountpoints[*]}"
 
-# for an initial run, btrbk requires the dir to exist.
-mkdir -p /mnt/{root,o}/btrbk
+if ! $fast; then
+  # if our mountpoints are from stale snapshots,
+  # it doesn't make sense to do a backup.
+  m check-subvol-stale ${mountpoints[@]} || die "found stale mountpoints in ${mountpoints[*]}"
+
+  # for an initial run, btrbk requires the dir to exist.
+  mkdir -p /mnt/{root,o}/btrbk
+fi
 local_zone=$(date +%z)
 
 if [[ $source ]]; then
-  if ! zone=$(ssh root@$source date +%z); then
-    if $conf_only; then
-      echo "$0: warning: failed to ssh to root@$source"
-    else
-      die failed to ssh to root@$source
+  if $fast; then
+    zone=$local_zone
+  else
+    if ! zone=$(ssh root@$source date +%z); then
+      if $conf_only; then
+        echo "$0: warning: failed to ssh to root@$source"
+      else
+        die failed to ssh to root@$source
+      fi
+    fi
+    if [[ $zone != "$local_zone" ]]; then
+      die "error: dont confuse yourself with multiple time zones. $h has different timezone than localhost"
     fi
   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 remote_info=( $(timeout -s 9 6 ssh root@$h "mkdir -p /mnt/root/btrbk /mnt/o/btrbk && date +%z && df --output=size,pcent / | tail -n1") ); then
+    if $fast || $conf_only; then
+      # Use some typical values in this case
+      root_size=$(( 1024 * 1024 * 2000 )) #2tb
+      percent_used=10
+      zone=$(date +%z)
+    elif tmpstr=$(timeout -s 9 6 ssh root@$h "mkdir -p /mnt/root/btrbk /mnt/o/btrbk && date +%z && df --output=size,pcent / | tail -n1"); then
+      IFS=" " read -r -a remote_info <<<"$tmpstr"
+
       zone=${remote_info[0]}
       root_size=${remote_info[1]}
       percent_used=${remote_info[2]%%%}
@@ -417,11 +451,6 @@ else
       if (( ${#remote_info[@]} != 3 )); then
         die "error: didnt get 3 fields in test ssh to target $h. investigate"
       fi
-    elif $conf_only; then
-      # Use some typical values in this case
-      root_size=$(( 1024 * 1024 * 2000 )) #2tb
-      percent_used=10
-      zone=$(date +%z)
     else
       sshfail+=($h)
       continue
@@ -499,6 +528,9 @@ snapshot_dir btrbk
 target_preserve $std_preserve
 target_preserve_min 2h
 
+# i tried this when investigating: clone no source subvolume found error
+#incremental_prefs sro:1 srn:1 sao san:1 aro:1 arn:1
+
 # if something fails and it's not obvious, try doing
 # btrbk -l debug -v dryrun
 
@@ -531,7 +563,7 @@ EOF
 mp_count=${#mountpoints[@]}
 for (( i=0; i < mp_count - 1 ; i++ )); do
   if [[ ${mountpoints[i]} == /q ]]; then
-    unset mountpoints[i]
+    unset "mountpoints[i]"
     mountpoints+=(/q)
   fi
 done
@@ -615,8 +647,12 @@ if mountpoint $rsync_mountpoint >/dev/null; then
   done
 fi
 
+subvols=()
+for mp in "${mountpoints[@]}"; do
+  subvols+=("${mp##*/}")
+done
 if [[ $source ]]; then
-  m mount-latest-subvol
+  m mount-latest-subvol "${subvols[@]}"
 else
   m /a/exe/mount-latest-remote ${targets[@]}
 fi