updated roles

templates/silent-install.conf.j2

diff --git a/templates/silent-install.conf.j2 b/templates/silent-install.conf.j2
index 3f8c779..0a54712 100644
--- a/templates/silent-install.conf.j2
+++ b/templates/silent-install.conf.j2
@@ -54,7 +54,7 @@
 {% endif %}
 BIND_ON_ALL_INTERFACES={{ opdk_bind_on_all_interfaces }}
 
-{% if pgmaster_ip is defined and pgstandby_ip is defined %}
+{% if pgmaster_ip is defined and pgmaster_ip | trim | length > 0 and pgstandby_ip is defined and pgstandby_ip | trim | length > 0 %}
 PG_MASTER={{ pgmaster_ip }}
 PG_STANDBY={{ pgstandby_ip }}
 {% endif %}