Add initial kosmos-postgresql cookbook

This is to install PostgreSQL all in one place instead of for each
service that needs it (Mastodon, ejabberd, ...)

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

@@ -0,0 +1,16 @@
+#
+# Cookbook:: kosmos-postgresql
+# Recipe:: default
+#
+# Copyright:: 2019, Kosmos, All Rights Reserved.
+
+node.override['postgresql']['enable_pgdg_apt'] = false
+# See https://github.com/sous-chefs/postgresql/issues/480
+node.override['postgresql']['pg_gem']['version'] = '0.21.0'
+include_recipe "postgresql::server"
+include_recipe "postgresql::ruby"
+unless node.chef_environment == "development"
+  node.override['postgresql']['config_pgtune']['db_type'] = "web"
+  include_recipe "postgresql::config_pgtune"
+end
+