updated monetization config when no pgmaster exists

tasks/postgres.yml

diff --git a/tasks/postgres.yml b/tasks/postgres.yml
index 5f404ed..588108b 100644
--- a/tasks/postgres.yml
+++ b/tasks/postgres.yml
@@ -70,3 +70,10 @@
       value: '{{ pgstandby_ip }}'
 
   when: groups['dc-1-pgmaster'] is defined and groups['dc-2-pgstandby'] is defined
+
+- block:
+  - name: Obtain postgres ip
+    set_fact:
+      pg_ip: "{{ groups['pg'][0] }}"
+
+  when: groups['pgmaster'] is not defined and groups['pgstandby'] is not defined
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