Prerequisites

Before completing this tutorial, set up cross-cluster replication to connect two clusters and configure a follower index.

In this tutorial, kibana_sample_data_ecommerce is replicated from clusterA to clusterB.

			## On clusterB ###
			PUT _cluster/settings
{
  "persistent": {
    "cluster": {
      "remote": {
        "clusterA": {
          "mode": "proxy",
          "skip_unavailable": "true",
          "server_name": "clustera.es.region-a.gcp.elastic-cloud.com",
          "proxy_socket_connections": "18",
          "proxy_address": "clustera.es.region-a.gcp.elastic-cloud.com:9400"
        }
      }
    }
  }
}

		

			## On clusterB ###
			PUT /kibana_sample_data_ecommerce2/_ccr/follow?wait_for_active_shards=1
{
  "remote_cluster": "clusterA",
  "leader_index": "kibana_sample_data_ecommerce"
}

		

Important

Writes (such as ingestion or updates) should occur only on the leader index. Follower indices are read-only and will reject any writes.