Add a recipe to set up a hosts entry for the PG primary

site-cookbooks/kosmos-postgresql/metadata.rb

@@ -22,3 +22,4 @@ chef_version '>= 12.14' if respond_to?(:chef_version)
 depends "postgresql", ">= 7.0.0"
 depends "build-essential"
 depends "kosmos_encfs"
+depends "hostsfile"

site-cookbooks/kosmos-postgresql/recipes/hostsfile.rb

@@ -0,0 +1,16 @@
+#
+# Cookbook:: kosmos-postgresql
+# Recipe:: hostsfile
+#
+
+begin
+primary_ip = postgresql_primary[:ipaddress]
+rescue NoMethodError
+end
+
+unless primary_ip.nil?
+  hostsfile_entry primary_ip do
+    hostname  "pg.kosmos.local"
+    unique    true
+  end
+end