[Elastic 7.2.1] Problem creating a cluster from 3 single nodes

Elastic Stack Elasticsearch
1

Hello,

I have 3 elastic servers initially in standalone mode, and I wanted to create a cluster with those 3 servers.
I configure them but the cluster/health tells me that there is only one node in my cluster.

The cluster name is the same for the 3 nodes.
Here is my conf (node.name is node1, node2 and node3 I only put node1 for the conf here but on each server node.name is set respectively to node1, node2 and node3):

cluster.name=rfp
network.host=0.0.0.0
network.publish_host=eth0
http.port=12020
transport.tcp.port=12021
node.name=node1
discovery.seed_hosts=node1:12021,node2:12021,node3:12021
cluster.initial_master_nodes=node1,node2,node3

the _cluster/health return me this on each node:
{
"cluster_name" : "rfp",
"status" : "green",
"timed_out" : false,
"number_of_nodes" : 1,
"number_of_data_nodes" : 1,
"active_primary_shards" : 0,
"active_shards" : 0,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0
}

Please help :slight_smile:

Regards,
Xavier

2

I am confused. If you have three servers initially in standalone mode, they are three different clusters, so they will not form a cluster.

if you want to merge the data of those three clusters together, you might be best off using snapshotting all the data, then create a fresh cluster from three nodes and then restoring everything into that new cluster instead of using existing nodes with an existing data directory.