Merge pull request #392 from Akrog/fix-workers-issues

Wait for DB writes to propagate (causality checks)

templates/cinder/config/00-global-defaults.conf

@@ -39,6 +39,11 @@ connection = {{ .DatabaseConnection }}
 max_retries = -1
 db_max_retries = -1
 
+# Wait for writes to complete when doing a read, update, or insert
+# Relevant for multi-master deployments so that workers table works as intended
+# https://mariadb.com/docs/server/ref/mdb/system-variables/wsrep_sync_wait/
+mysql_wsrep_sync_wait = 7
+
 [os_brick]
 lock_path = /var/locks/openstack/os-brick