# Add nodes to the cluster on the fly **URL:** \ **Category:** Elasticsearch\ **Created:** [October 26, 2021, 9:27am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666 "2021-10-26T09:27:05Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Ain\_Ryushika](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ain_ryushika/32/77273_2.png) [@Ain\_Ryushika](https://discuss.elastic.co/u/Ain_Ryushika)\ **Post date:** [October 26, 2021, 9:27am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/1 "2021-10-26T09:27:05Z")
Hello, I have a task to add 2 more nodes in a cluster. Currently we have 5 nodes in a cluster which are all data nodes. Elastic version 7.11.2. Current discovery parameters set for cluster: ```auto "discovery.zen.ping.unicast.hosts" which lists all 5 data nodes "discovery.zen.minimum_master_nodes: 3" ``` My question is which parameters I should set on a new node to it join the cluster on the fly? 1. Do I need to add "discovery.zen.ping.unicast.hosts" parameter which lists all nodes on a new node? Or "cluster.name" would be enough for a node to join the cluster? 2. Do I need to change parameter "discovery.zen.ping.unicast.hosts" on current cluster to include new node? Thanks! ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [October 26, 2021, 9:44am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/2 "2021-10-26T09:44:24Z")
Both of these settings were deprecated in 7.0 and you should not be using them any more. Instead, [set `discovery.seed_hosts`](https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html#discovery-settings) to the addresses of the master nodes only. ---
**Author:** ![Ain\_Ryushika](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ain_ryushika/32/77273_2.png) [@Ain\_Ryushika](https://discuss.elastic.co/u/Ain_Ryushika)\ **Post date:** [October 26, 2021, 10:11am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/3 "2021-10-26T10:11:41Z")
So if all my 5 nodes are data notes and master nodes, I would list them all in "discovery.seed\_hosts" parameter on new nodes? ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [October 26, 2021, 10:20am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/4 "2021-10-26T10:20:00Z")
Yes. ---
**Author:** ![Ain\_Ryushika](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ain_ryushika/32/77273_2.png) [@Ain\_Ryushika](https://discuss.elastic.co/u/Ain_Ryushika)\ **Post date:** [November 2, 2021, 10:08am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/5 "2021-11-02T10:08:13Z")
And if i have minimum of 3 master nodes parameter set up, do I need to change this parameter in the config file on a new nodes? I have this parameter on initial 5 node cluster: ```auto discovery.zen.minimum_master_nodes: 3 ``` I plan to add 2 new nodes, do I need to change this parameter on a new nodes? ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [November 2, 2021, 11:13am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/6 "2021-11-02T11:13:50Z")
> [@Ain\_Ryushika](#): > > do I need to change this parameter on a new nodes? No, this setting was deprecated in 7.0 and shouldn't be used. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 30, 2021, 11:14am UTC](https://discuss.elastic.co/t/add-nodes-to-the-cluster-on-the-fly/287666/7 "2021-11-30T11:14:43Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.