db-koji02: create vm and config files for hot standby kojidb.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/postgresql_server/templates/postgresql.conf

@@ -505,3 +505,11 @@ default_text_search_config = 'pg_catalog.english'
 #
 # Number of concurrent i/o operations at the same time. The default is 1.
 effective_io_concurrency = 1
+
+{% if ansible_hostname.startswith("db-koji01") %}
+wal_level = 'hot_standby'
+max_wal_senders = 10
+wal_keep_segments = 100
+{% elif ansible_hostname.startswith("db-koji02") %}
+hot_standby = on
+{% endif %}