If you run Elasticsearch and use Kibana for various reasons, you better ensure to perform automatic backups. The time spend in searches, visualizations and dashboard should be worth that. If an Elasticsearch upgrade goes south, you are happy to have a backup. The main advantages of an Elasticsearch cluster, that you can join and remove additional nodes, which may differ in their resources and capacity. That’s the situation I constantly deal at work. Shard Allocation Filtering helps to setup smart rules for example hot warm architecture.