kibana는elasticsearch 집단의 여러 노드를 연결합니다

https://www.elastic.co/guide/en/kibana/current/production.html#load-balancing

Load Balancing Across Multiple Elasticsearch Nodesedit

If you have multiple nodes in your Elasticsearch cluster, the easiest way to distribute Kibana requests across the nodes is to run an Elasticsearch client node on the same machine as Kibana. Elasticsearch client nodes are essentially smart load balancers that are part of the cluster. They process incoming HTTP requests, redirect operations to the other nodes in the cluster as needed, and gather and return the results. For more information, see Node in the Elasticsearch reference.
To use a local client node to load balance Kibana requests:
Install Elasticsearch on the same machine as Kibana.
Configure the node as a client node. In  elasticsearch.yml , set both  node.data  and node.master  to  false :

# 3. You want this node to be neither master nor data node, but
#    to act as a "search load balancer" (fetching data from nodes,
#    aggregating results, etc.)
#
node.master: false
node.data: false

Configure the client node to join your Elasticsearch cluster. In  elasticsearch.yml , set the cluster.name  to the name of your cluster.

cluster.name: "my_cluster"

Make sure Kibana is configured to point to your local client node. In  kibana.yml , the elasticsearch.url  should be set to  localhost:9200 .

# The Elasticsearch instance to use for all your queries.
elasticsearch.url: "http://localhost:9200"