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
restore_new_btrbk=false
restore_old_btrbk=false
-cleanup() {
+errcatch-cleanup() {
if $restore_new_btrbk; then
- $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
- $old_shell sudo systemctl start btrbk.timer
+ e WARNING: due to failure, btrbk.timer may need manual restoration:
+ e $old_shell sudo systemctl start btrbk.timer
fi
}
-_errcatch_cleanup=cleanup # used by sourced err
-
+b
pre="${0##*/}:"
m() { printf "$pre %s\n" "$*"; "$@"; }
e() { printf "$pre %s\n" "$*"; }
+err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
##### begin command line parsing ########
(( $# == 2 )) || usage 1
-old_host=$1
-new_host=$2
+
+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
+ exit 1
+ ;;
+esac
+
+
source /a/bin/bash_unpublished/source-state
if [[ $old_host != "$MAIL_HOST" ]]; then
fi
fi
-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=
-fi
-
if [[ ! $new_host || ! $old_host ]]; then
echo "$0: bad args. see script"
exit 1
fi
-
-source /a/bin/bash_unpublished/source-state
-
-
+e $new_shell hostname
new_hostname=$($new_shell hostname)
########### end initial processing, begin actually modifying things ##########
fi
btrbk_test="systemctl is-active btrbk.service"
-while [[ $($new_shell $btrbk_test) != inactive ]] || [[ $($old_shell $btrbk_test) != inactive ]]; do
- echo "$0: btrbk is running on new or old host. sleeping for 8 seconds"
- sleep 6
- echo "$0: testing for btrbk activity in 2 seconds"
- sleep 2
+while true; do
+ for shell in "$new_shell" "$old_shell"; do
+ e $shell $btrbk_test
+ status=$($shell $btrbk_test) ||:
+ case $status in
+ inactive|failed) : ;;
+ *)
+ e "btrbk active on shell:$shell, status:$status, sleeping 8 seconds"
+ sleep 8
+ continue
+ ;;
+ esac
+ done
+ break
done
# ensure these are unused before doing anything
# I think exim will try ipv6 first, so no need to disable
# ipv6 i think.
+
+if ! m btrbk-run -v $bbk_args $mp_args; then
+ ret=$?
+ err "failed initial btrbk"
+ exit $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
+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
+ exit $ret
fi
-m $new_shell /a/exe/primary-setup $new_hostname
+m $new_shell /a/exe/primary-setup localhost