1 files changed, 32 insertions, 0 deletions
diff --git a/community/postgresql-bdr/postgresql-bdr.pre-upgrade b/community/postgresql-bdr/postgresql-bdr.pre-upgrade
new file mode 100644
index 00000000000..6116252c193
--- /dev/null
+++ b/community/postgresql-bdr/postgresql-bdr.pre-upgrade
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+new="$1"
+old="$2"
+
+pgver=${new%.*}
+compare=$(apk version -t "$old" $pgver)
+
+# check if we upgrade from earlier than $pgver and if it is running
+if [ "$compare" != "<" ] || ! /etc/init.d/postgresql --quiet status; then
+	exit 0
+fi
+
+if [ -f /etc/conf.d/postgresql ]; then
+	. /etc/conf.d/postgresql
+fi
+
+cat <<EOF
+* You are upgrading to postgres $pgver wich is not compatible with the running
+* See: http://www.postgresql.org/docs/$pgver/static/upgrading.html
+*
+* The corresponding steps for Alpine Linux is:
+*
+*  pg_dumpall -U ${PGUSER:-postgres} > dumpfile
+*  /etc/init.d/postgresql stop
+*  apk add -u postgresql
+*  /etc/init.d/postgresql setup
+*  /etc/init.d/postgresql start
+*  psql -U ${PGUSER:-postgres} -f dumpfile
+*
+EOF
+exit 1