# Add second elasticsearch node
**URL:** https://discuss.elastic.co/t/add-second-elasticsearch-node/296721
**Category:** Elasticsearch
**Tags:** docker
**Created:** [February 9, 2022, 12:25pm UTC](https://discuss.elastic.co/t/add-second-elasticsearch-node/296721 "2022-02-09T12:25:07Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Vitalii\_Kulinich](https://discuss.elastic.co/u/Vitalii_Kulinich)
#### Post date: [February 9, 2022, 12:25pm UTC](https://discuss.elastic.co/t/add-second-elasticsearch-node/296721/1 "2022-02-09T12:25:08Z")
Hi, please help to understand how can I add second Elasticsearch node.
So we have run Elasticsearch + kibana as docker containers.
Elasticsearch in config - "discovery.type=single-node", I want to add one more node as replica to another server and don't wont to lose data on existing.
How can I do that?
Is add "discovery.seed\_hosts:" enough?
> **[Important Elasticsearch configuration | Elasticsearch Guide \[7.17\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html#unicast.hosts)**
What should I change on existing node?
Thanks
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 9, 2022, 12:25pm UTC](https://discuss.elastic.co/t/add-second-elasticsearch-node/296721/2 "2022-03-09T12:25:33Z")
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