X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;ds=sidebyside;f=switch-mail-host;h=180b963c6b2f1da82955406864d74f217ebf9292;hb=47ee117d32270bbd288da25a2da11e42674c02cc;hp=ffff83e264dbce8b7e1034d85aea10a055711712;hpb=ec17ba8d0cabf1d03f7750406ac687873b12e7f0;p=distro-setup

diff --git a/switch-mail-host b/switch-mail-host
index ffff83e..180b963 100644
--- a/switch-mail-host
+++ b/switch-mail-host
@@ -10,6 +10,10 @@ Turn off mail receiving on OLD_HOST, run btrbk to move mail to NEW_HOST,
 turn on mail receiving on NEW_HOST.  Assumes we want to move all
 filesystems unless passing -o.
 
+-a         Avoid snapshot /a, /q, and similar. If we haven't
+           made any changes in the last hour, there is no
+           need to snapshot anything but /o, and we will
+           just do that once.
 -i         Disallow incremental backup.
 -o         Only btrbk /o, instead of all filesystems.
 --force    Run even though our local state does not say that MAIL_HOST is
@@ -33,11 +37,11 @@ restore_old_btrbk=false
 err-cleanup() {
   if $restore_new_btrbk; then
     e WARNING: due to failure, btrbk.timer may need manual restoration:
-    e $new_shell systemctl start btrbk.timer
+    e $new_shell systemctl start btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   fi
   if $restore_old_btrbk; then
     e WARNING: due to failure, btrbk.timer may need manual restoration:
-    e $old_shell systemctl start btrbk.timer
+    e $old_shell systemctl start btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   fi
 }
 
@@ -58,10 +62,11 @@ mail_only=false
 host2_only=false
 force=false
 mp_args="-m /o,/a,/ar,/q,/qr"
-temp=$(getopt -l force,help ioh "$@") || usage 1
+temp=$(getopt -l force,help aioh "$@") || usage 1
 eval set -- "$temp"
 while true; do
   case $1 in
+    -a) snapshot_arg=resume ;;
     --force) force=true ;;
     -i) incremental_arg="-i" ;;
     -o)
@@ -141,15 +146,16 @@ elif $host2_only; then
   mp_args="-m /a,/ar,/q,/qr"
 fi
 
-
-if $host2_only; then
-  if [[ $old_hostname != "$HOST2" ]]; then
-    err "\$old_hostname($old_hostname) != \$HOST2($HOST2). Rerun with --force if you really want this."
+if ! $force; then
+  if $host2_only; then
+    if [[ $old_hostname != "$HOST2" ]]; then
+      err "\$old_hostname($old_hostname) != \$HOST2($HOST2). Rerun with --force if you really want this."
+      exit 1
+    fi
+  elif [[ $old_hostname != "$MAIL_HOST" ]]; then
+    err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
     exit 1
   fi
-elif [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
-  err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
-  exit 1
 fi
 
 if [[ ! $new_host || ! $old_host ]]; then
@@ -161,11 +167,11 @@ fi
 ########### end initial processing, begin actually modifying things ##########
 
 if $new_shell systemctl is-active btrbk.timer; then
-  m $new_shell systemctl stop btrbk.timer
+  m $new_shell systemctl stop btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   restore_new_btrbk=true
 fi
 if $old_shell systemctl is-active btrbk.timer; then
-  m $old_shell systemctl stop btrbk.timer
+  m $old_shell systemctl stop btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   restore_old_btrbk=true
 fi
 
@@ -241,7 +247,7 @@ EOF
 
 
 e Running initial btrbk
-m btrbk-run -v $bbk_args $incremental_arg $mp_args || ret=$?
+m btrbk-run -v $bbk_args $incremental_arg $mp_args $snapshot_arg || ret=$?
 if (( ret )); then
   err "failed initial btrbk"
   exit $ret
@@ -254,9 +260,10 @@ fi
 
 if $host2_only; then
   if [[ $old_hostname != "$MAIL_HOST" && $old_hostname != kd ]]; then
-    m $old_shell systemctl --now disable btrbk.timer
+    # most systems dont have btrbk-spread, systemctl exits 5 on unknown unit
+    m $old_shell systemctl --now disable btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   fi
-  m $new_shell systemctl --now enable btrbk.timer
+  m $new_shell systemctl --now enable btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   exit 0
 fi