# How to add nodes to cluster through source code **URL:** \ **Category:** Elasticsearch\ **Created:** [March 25, 2019, 10:00am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716 "2019-03-25T10:00:23Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![MKU](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mku/32/48327_2.png) [@MKU](https://discuss.elastic.co/u/MKU)\ **Post date:** [March 25, 2019, 10:00am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/1 "2019-03-25T10:00:23Z")
I want to add a node to my cluster(currently single node),but i want to add a node through source code. Which file i should look into. ---
**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:** [March 25, 2019, 10:38am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/2 "2019-03-25T10:38:58Z")
I don't know what you mean by "through source code". Each node is a separate process, so to add a second node you just configure it and then run it. ---
**Author:** ![MKU](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mku/32/48327_2.png) [@MKU](https://discuss.elastic.co/u/MKU)\ **Post date:** [March 25, 2019, 10:42am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/3 "2019-03-25T10:42:52Z")
Hi @DavidTurner, i am not running elasticsearch installer,i am running elasticsearch instance by **gradlew run** in eclipse. How do i add node in this case because elasticsearch.yml gets dynamically generated. ---
**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:** [March 25, 2019, 11:29am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/4 "2019-03-25T11:29:47Z")
Ah I see. I don't think it's possible to run multiple nodes from an IDE. You can use [remote debugging](https://github.com/elastic/elasticsearch/blob/master/TESTING.asciidoc#debugging-remotely-from-an-ide) to attach an IDE to a node started elsewhere. It's also possible to write test cases that simulate running multiple nodes: see `ESIntegTestCase` and its derived classes for examples of this. ---
**Author:** ![MKU](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mku/32/48327_2.png) [@MKU](https://discuss.elastic.co/u/MKU)\ **Post date:** [April 22, 2019, 9:40am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/5 "2019-04-22T09:40:31Z")
[In this post](https://discuss.elastic.co/t/set-up-elasticsearch-cluster-2-nodes-on-same-machine/120824/5) , he added nodes by , `node.max_local_storage_nodes: 4` in `elasticsearch.yml` . Is it not possible to **hardcode** the number of nodes in source code. ---
**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:** [April 22, 2019, 9:51am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/6 "2019-04-22T09:51:21Z")
Setting `node.max_local_storage_nodes` doesn't run any extra nodes so I don't think it addresses your question. There's no way to "hardcode" a setting value, but I don't see why you would want to do that. If you don't want to change it, simply don't change it! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 20, 2019, 9:51am UTC](https://discuss.elastic.co/t/how-to-add-nodes-to-cluster-through-source-code/173716/7 "2019-05-20T09:51:23Z")
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