From 4b62b587afca4a42608d152ab63c09d22b2c37b0 Mon Sep 17 00:00:00 2001
From: James Page <james.page@ubuntu.com>
Date: Wed, 21 Feb 2018 17:46:37 +0000
Subject: [PATCH] Support expand->migrate->contract db migrations

In order to support rolling upgrades, OpenStack services
are moving to a trigger driven approach to db upgrade,
involving expand, migrate and contract phases.

This requires that the underlying db supports creation of
such triggers which requires that:

  log_bin_trust_function_creators = 1

in the MySQL global configuration.

Change-Id: Id2cf2dd5a0929270229541e6cd488cd1c0d6103e
Closes-Bug: 1750705
---
 templates/mysqld.cnf | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/templates/mysqld.cnf b/templates/mysqld.cnf
index cffbb05..9b0a854 100644
--- a/templates/mysqld.cnf
+++ b/templates/mysqld.cnf
@@ -72,6 +72,9 @@ log_bin={{ binlogs_path }}
 expire_logs_days        = {{ binlogs_expire_days }}
 max_binlog_size         = {{ binlogs_max_size }}
 
+# Required to allow trigger creation for openstack services
+log_bin_trust_function_creators = 1
+
 #
 # * InnoDB
 #