X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=switch-mail-host;h=14a11f866ab3b03ea0d51eedf833e7782a38d848;hb=165008e5b82c81ebff1061c8f8294c3bc6e9dced;hp=11c0f40a382f17906fab4621ed0e9543ac9e6b29;hpb=41235a1a070914920dc84f352abee00deccda146;p=distro-setup

diff --git a/switch-mail-host b/switch-mail-host
old mode 100755
new mode 100644
index 11c0f40..14a11f8
--- a/switch-mail-host
+++ b/switch-mail-host
@@ -4,7 +4,7 @@ source /usr/local/lib/err
 
 usage() {
   cat <<EOF
-Usage: ${0##*/} OLD_HOST NEW_HOST
+Usage: ${0##*/} push|pull HOST
 
 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
@@ -24,19 +24,22 @@ EOF
 
 restore_new_btrbk=false
 restore_old_btrbk=false
-cleanup() {
+errcatch-cleanup() {
   if $restore_new_btrbk; then
-    m $new_shell sudo systemctl start btrbk.timer
+    e WARNING: due to failure, btrbk.timer may need manual restoration:
+    e $new_shell sudo systemctl start btrbk.timer
   fi
   if $restore_old_btrbk; then
-    m $old_shell sudo systemctl start btrbk.timer
+    e WARNING: due to failure, btrbk.timer may need manual restoration:
+    e $old_shell sudo systemctl start btrbk.timer
   fi
 }
-_errcatch_cleanup=cleanup # used by sourced err
 
 pre="${0##*/}:"
 m() { printf "$pre %s\n"  "$*"; "$@"; }
 e() { printf "$pre %s\n"  "$*"; }
+err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
+mexit() { echo "exiting with status $1"; exit $1; }
 
 ##### begin command line parsing ########
 
@@ -48,40 +51,45 @@ while true; do
     -o) mp_args="-m /o"; shift ;;
     -h|--help) usage ;;
     --) shift; break ;;
-    *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
+    *) echo "$0: Internal error! unexpected args: $*" ; mexit 1 ;;
   esac
 done
 
 
 (( $# == 2 )) || usage 1
 
-old_host=$1
-new_host=$2
-source /a/bin/bash_unpublished/source-state
 
-if [[ $old_host != "$MAIL_HOST" ]]; then
-  read -r -p "warning: \$old_host != \$MAIL_HOST: $old_host != $MAIL_HOST, proceed? y/N "
-  if [[ $REPLY != [yY] ]]; then
-    exit 1
-  fi
-fi
+case $1 in
+  push)
+    new_host=$2
+    bbk_args="-s $old_host"
+    new_shell="ssh $new_host"
+    old_host=$HOSTNAME
+    ;;
+  pull)
+    old_host=$2
+    bbk_args="-t $new_host"
+    bbk_args="-s $old_host"
+    new_host=$HOSTNAME
+    old_shell="ssh $old_host"
+    ;;
+  *)
+    err invalid first argument
+    mexit 1
+    ;;
+esac
 
-if [[ $new_host == "$HOSTNAME" ]]; then
-  localhost_new=true
-  new_shell=
-else
-  localhost_new=false
-  new_shell="ssh $new_host"
-fi
 
-old_shell="ssh $old_host"
-if [[ $old_host == "$HOSTNAME" ]]; then
-  old_shell=
+source /a/bin/bash_unpublished/source-state
+
+if [[ $old_host != "$MAIL_HOST" ]]; then
+  e "WARNING: \$old_host != \$MAIL_HOST. Sleeping for 5 seconds in case you want to reconsider"
+  sleep 5
 fi
 
 if [[ ! $new_host || ! $old_host ]]; then
   echo "$0: bad args. see script"
-  exit 1
+  mexit 1
 fi
 
 e $new_shell hostname
@@ -138,12 +146,25 @@ EOF
 # I think exim will try ipv6 first, so no need to disable
 # ipv6 i think.
 
+
+e Running initial btrbk
+if ! m btrbk-run -v $bbk_args $mp_args; then
+  ret=$?
+  err "failed initial btrbk"
+  mexit $ret
+fi
+
 m $old_shell /a/exe/primary-setup $new_hostname
 
-if $localhost_new; then
-  m btrbk-run -v -s $old_host $mp_args
-else
-  m btrbk-run -v -t $new_host $mp_args
+e Running main btrbk
+if ! m btrbk-run -v $bbk_args -m /o; then
+  ret=$?
+  bang="$(printf "$(tput setaf 5)█$(tput sgr0)%.0s" 1 2 3 4 5 6 7)"
+  e $bang failed btrbk of /o. restoring old host as primary
+  m $old_shell /a/exe/primary-setup localhost
+  mexit $ret
 fi
 
-m $new_shell /a/exe/primary-setup $new_hostname
+m $new_shell /a/exe/primary-setup localhost
+
+mexit 0