Elasticsearch nodes

Elastic Stack Elasticsearch
1

hi guys,

I need to know if it is possible to connect two elasticsearch nodes and if so which port can be used to do so?

2

From what? From where?

Can you explain a bit more?

3

Edit the elasticsearch.yml on both nodes:

  • Make sure 'cluster.name' is the same on both nodes;
  • Let 'discovery.zen.ping.unicast.hosts' point to each others IP addresses;
    Format: discovery.zen.ping.unicast.hosts ["xxx.xxx.xxx.xxx"]
  • Set 'network.host' to their own IP address and make sure in your firewall they only allow each other to connect to port 9200.
4

hi David,
To further clarify my question:

company has two different locations, say DC & DR, both these locations have elasticsearch installed. > My requirement was that by keeping the cluster name similar, can I connect between the elasticsearch nodes?
and if it is possible which ports should be opened for the communication between the nodes?

5

If you mean to share the same cluster across 2 different datacenter, I'd recommend not doing that.

If you have one cluster per Datacenter and want to search in both from the same client, have a look at federated search: https://www.elastic.co/guide/en/elasticsearch/reference/5.x/modules-cross-cluster-search.html

This is coming in 5.3

6

Hi David,

I was not talking about sharing two clusters but sharing two nodes.
i wanted to use a single cluster under which there would be two different nodes at two different locations which then would communicate with each other.
Is it possible?

7

It is technically doable. It is absolutely not recommended because of Latency issues.
We are working on Cross Data Center clusters but it's not ready.

For now, you need to create 2 clusters, one in each region, then push your documents to both clusters.

You can use something like Federated Search to search in both clusters though.

8

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