# Can't create cluster with 2 nodes on elasticsearch version 2.2.2 **URL:** \ **Category:** Elasticsearch\ **Created:** [January 17, 2023, 4:36pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350 "2023-01-17T16:36:25Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![KaZuKi\_Yashiro](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kazuki_yashiro/32/80467_2.png) [@KaZuKi\_Yashiro](https://discuss.elastic.co/u/KaZuKi_Yashiro)\ **Post date:** [January 17, 2023, 4:36pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350/1 "2023-01-17T16:36:25Z")
Hello there! 🙂 We have a single node of Elasticsearch version 2.2.2 and we decided to extend this cluster to two nodes, with replicas and so. But problem is that these two nodes doesn't see each other. =( Here's elasticsearch.yml output second node: ```auto cluster.name: awesomecluster cluster.routing.allocation.disk.watermark.high: 97% cluster.routing.allocation.disk.watermark.low: 96% cluster.routing.allocation.enable: all discovery.zen.minimum_master_nodes: 1 discovery.zen.ping.multicast.enabled: false discovery.zen.ping.unicast.hosts: - 192.168.1.125 - 192.168.1.24 index.number_of_replicas: 1 network.host: 192.168.1.24 node.name: es2 script.engine.groovy.inline.aggs: true script.engine.groovy.inline.search: true ``` first node (with data): ```auto cluster.name: awesomecluster cluster.routing.allocation.disk.watermark.high: 97% cluster.routing.allocation.disk.watermark.low: 96% cluster.routing.allocation.enable: all discovery.zen.minimum_master_nodes: 1 discovery.zen.ping.multicast.enabled: false discovery.zen.ping.unicast.hosts: - 192.168.1.125 - 192.168.1.24 index.number_of_replicas: 1 network.host: 192.168.1.125 node.name: es1 script.engine.groovy.inline.aggs: true script.engine.groovy.inline.search: true ``` Here's logs from es1 and es2 nodes: es2 ```auto [2023-01-17 18:43:24,979][INFO][node] [es2] version[2.2.2], pid[96220], build[fcc01dd/2016-03-29T08:49:35Z] [2023-01-17 18:43:24,979][INFO][node] [es2] initializing ... [2023-01-17 18:43:25,290][INFO][plugins] [es2] modules [lang-expression, lang-groovy], plugins [], sites [] [2023-01-17 18:43:25,305][INFO][env] [es2] using [1] data paths, mounts [[/usr/share/elasticsearch/data (/dev/vdb1)]], net usable_space [5tb], net total_space [7.7tb], spins? [possibly], types [ext4] [2023-01-17 18:43:25,305][INFO][env] [es2] heap size [7.9gb], compressed ordinary object pointers [true] [2023-01-17 18:43:26,318][INFO][node] [es2] initialized [2023-01-17 18:43:26,318][INFO][node] [es2] starting ... [2023-01-17 18:43:26,421][INFO][transport] [es2] publish_address {es2/192.168.1.24:9300}, bound_addresses {0.0.0.0:9300} [2023-01-17 18:43:26,427][INFO][discovery] [es2] awesomecluster/7uh156jiQ3-xx9uCX7_2cQ [2023-01-17 18:43:29,443][INFO][cluster.service] [es2] new_master {es2}{7uh156jiQ3-xx9uCX7_2cQ}{192.168.1.24}{es2/192.168.1.24:9300}, reason: zen-disco-join(elected_as_master, [0] joins received) [2023-01-17 18:43:29,468][INFO][http] [es2] publish_address {es2/192.168.1.24:9200}, bound_addresses {0.0.0.0:9200} [2023-01-17 18:43:29,468][INFO][node] [es2] started [2023-01-17 18:43:29,470][INFO][gateway] [es2] recovered [0] indices into cluster_state ``` es1 ```auto 2023-01-17 17:25:47,729][INFO][node] [es1] version[2.2.2], pid[92695], build[fcc01dd/2016-03-29T08:49:35Z] [2023-01-17 17:25:47,730][INFO][node] [es1] initializing ... [2023-01-17 17:25:48,043][INFO][plugins] [es1] modules [lang-expression, lang-groovy], plugins [], sites [] [2023-01-17 17:25:48,058][INFO][env] [es1] using [1] data paths, mounts [[/usr/share/elasticsearch/data (/dev/vdb1)]], net usable_space [4.5tb], net total_space [7.6tb], spins? [possibly], types [ext4] [2023-01-17 17:25:48,058][INFO][env] [es1] heap size [7.9gb], compressed ordinary object pointers [true] [2023-01-17 17:25:49,247][INFO][node] [es1] initialized [2023-01-17 17:25:49,247][INFO][node] [es1] starting ... [2023-01-17 17:25:49,347][INFO][transport] [es1] publish_address {es1/192.168.1.125:9300}, bound_addresses {0.0.0.0:9300} [2023-01-17 17:25:49,353][INFO][discovery] [es1] awesomecluster/vF8iXeYpQmCB0yozjRL7fA [2023-01-17 17:25:52,370][INFO][cluster.service] [es1] new_master {es1}{vF8iXeYpQmCB0yozjRL7fA}{192.168.1.125}{es1/192.168.1.125:9300}, reason: zen-disco-join(elected_as_master, [0] joins received) [2023-01-17 17:25:52,395][INFO][http] [es1] publish_address {es1/192.168.1.125:9200}, bound_addresses {0.0.0.0:9200} [2023-01-17 17:25:52,395][INFO][node] [es1] started [2023-01-17 17:25:53,016][INFO][gateway] [es1] recovered [124] indices into cluster_state [2023-01-17 17:25:57,935][INFO][cluster.routing.allocation] [es1] Cluster health status changed from [RED] to [GREEN] (reason: [shards started [[wsman][4], [wsman][4]] ...]). ``` Can you help me with this?) P.s Telnet with ip and port - works well ---
**Author:** ![leandrojmp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/leandrojmp/32/107231_2.png) [@leandrojmp](https://discuss.elastic.co/u/leandrojmp)\ **Post date:** [January 17, 2023, 6:02pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350/2 "2023-01-17T18:02:10Z")
Your nodes won't talk with each other this way, you have now two cluster with the same name because both the nodes are master eligible and you set `minimun_master_nodes` to `1`, this is know as split brain. If you want to add another node to your current cluster you need to set the node roles of your second node and do not make this node a `master-eligible` node. Basically you will need this in your `elasticsearch.yml` as explained in the [documentation](https://www.elastic.co/guide/en/elasticsearch/reference/2.2/modules-node.html). ```auto node.master: false node.data: true ``` I'm not sure, but I think that you would also need to delete the data in the new node for it to be able to join the cluster since it already formed a cluster, trying to add it now may have undesired consequences. After this you will be able to form a cluster with two nodes, but if your master node goes down, your entire cluster will be unvailable. If you want some kind of resilience you would need to have three nodes and change `minimun_master_nodes` to `2`. One important thing, version 2.X is way past its EOL, I'm not sure if those changes will work as I haven't worked with version 2 for many years, do it at your own risk. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [January 17, 2023, 11:35pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350/3 "2023-01-17T23:35:04Z")
> [@leandrojmp](#): > > One important thing, version 2.X is way past its EOL, I'm not sure if those changes will work as I haven't worked with version 2 for many years, do it at your own risk. Yeah, it's very, very. very old, please see the [EOL](https://www.elastic.co/support/eol) page. ---
**Author:** ![KaZuKi\_Yashiro](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kazuki_yashiro/32/80467_2.png) [@KaZuKi\_Yashiro](https://discuss.elastic.co/u/KaZuKi_Yashiro)\ **Post date:** [January 18, 2023, 4:34pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350/4 "2023-01-18T16:34:16Z")
Ok, got it! Thank you very much! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 15, 2023, 4:35pm UTC](https://discuss.elastic.co/t/cant-create-cluster-with-2-nodes-on-elasticsearch-version-2-2-2/323350/5 "2023-02-15T16:35:08Z")
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