# Trouble setting up an elasticsearch cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [October 11, 2019, 1:50pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245 "2019-10-11T13:50:12Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![mtudisco](https://avatars.discourse-cdn.com/v4/letter/m/3d9bf3/32.png) [@mtudisco](https://discuss.elastic.co/u/mtudisco)\ **Post date:** [October 11, 2019, 1:50pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/1 "2019-10-11T13:50:12Z")
Hi, i'm trying to set up a cluster with 3 nodes es-node1 es-node2 es-node3 installed elasticsearch 7.4 on 3 nodes con configure elasticsearch.yml with the following: ``` cluster.name: es-cluster node.name: es-node1 node.master: true node.data: true bootstrap.memory_lock: true network.host: 0.0.0.0 discovery.seed_hosts: ["es-node1"] cluster.initial_master_nodes: ["es-node1"] ``` however when i start nodes each node starts its own cluster: > ``` > [root@es-node1 elasticsearch]# curl -XGET http://192.168.90.225:9200/_cluster/health?pretty > { > "cluster_name" : "es-cluster", > "status" : "yellow", > "timed_out" : false, > "number_of_nodes" : 1, > "number_of_data_nodes" : 1, > "active_primary_shards" : 85, > "active_shards" : 85, > "relocating_shards" : 0, > "initializing_shards" : 0, > "unassigned_shards" : 44, > "delayed_unassigned_shards" : 0, > "number_of_pending_tasks" : 0, > "number_of_in_flight_fetch" : 0, > "task_max_waiting_in_queue_millis" : 0, > "active_shards_percent_as_number" : 65.89147286821705 > } > > ``` Selinux is in permissive and firewall down to avoid trouble. Any idea? ---
**Author:** ![mtudisco](https://avatars.discourse-cdn.com/v4/letter/m/3d9bf3/32.png) [@mtudisco](https://discuss.elastic.co/u/mtudisco)\ **Post date:** [October 11, 2019, 6:46pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/2 "2019-10-11T18:46:56Z")
Finally made it work, had to start each node with a slightliy different configuration ``` node1: cluster.name: es-cluster node.name: es-node1 node.master: true node.data: true bootstrap.memory_lock: true network.host: 192.168.90.225 #network.host: 0.0.0.0 discovery.seed_hosts: - es-node1 - es-node2 - es-node3 cluster.initial_master_nodes: - es-node1 node2: cluster.name: es-cluster node.name: es-node2 node.master: true node.data: true bootstrap.memory_lock: true network.host: 192.168.90.226 #network.host: 0.0.0.0 discovery.seed_hosts: - es-node1 - es-node2 - es-node3 cluster.initial_master_nodes: - es-node1 - es-node2 node3: cluster.name: es-cluster node.name: es-node3 node.master: true node.data: true bootstrap.memory_lock: true network.host: 192.168.90.227 #network.host: 0.0.0.0 discovery.seed_hosts: - es-node1 - es-node2 - es-node3 cluster.initial_master_nodes: - es-node1 - es-node2 - es-node3 ``` ---
**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 12, 2019, 9:03am UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/3 "2019-10-12T09:03:28Z")
For the benefit of future readers, the solution described above contains a misconfiguration which can result in data loss. From [the docs](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery-bootstrap-cluster.html): > **WARNING** : You must set `cluster.initial_master_nodes` to the same list of nodes on each node on which it is set in order to be sure that only a single cluster forms during bootstrapping... This is not what you have done. ---
**Author:** ![mtudisco](https://avatars.discourse-cdn.com/v4/letter/m/3d9bf3/32.png) [@mtudisco](https://discuss.elastic.co/u/mtudisco)\ **Post date:** [October 14, 2019, 12:19pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/4 "2019-10-14T12:19:44Z")
Thanks David, but with all nodes in cluster.initial\_master\_nodes cluster did not start. However in the way i managed to get it started now i see all nodes forming the cluster: ``` curl --cacert /etc/elasticsearch/certs/ca.crt -u elastic -XGET https://192.168.90.225:9200/_cat/nodes?v Enter host password for user 'elastic': ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name 192.168.90.226 14 21 0 0.00 0.01 0.05 dilm - es-node2 192.168.90.227 9 21 0 0.00 0.01 0.05 dilm * es-node3 192.168.90.225 8 21 0 0.00 0.01 0.05 dilm - es-node1 ``` So i guess i got a single cluster, what else do you think might have been wrong? 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 14, 2019, 12:24pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/5 "2019-10-14T12:24:39Z")
> [@mtudisco](#): > > So i guess i got a single cluster, what else do you think might have been wrong? Fortunately it looks like you did indeed get a single cluster, but this was luck. You could have ended up with two. All three nodes is the correct setting for `cluster.initial_master_nodes ` so I suspect something else was going wrong there. Do you have logs from the case where the cluster did not start? If so can you share them here? ---
**Author:** ![mtudisco](https://avatars.discourse-cdn.com/v4/letter/m/3d9bf3/32.png) [@mtudisco](https://discuss.elastic.co/u/mtudisco)\ **Post date:** [October 14, 2019, 12:29pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/6 "2019-10-14T12:29:52Z")
Unfortunatelly i dont have logs, whenever it did not work i deleted the logs prior to some modification to avoid having to dig to much into the logs on the next try. regards ---
**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 14, 2019, 12:31pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/7 "2019-10-14T12:31:16Z")
Ok, not to worry. If you manage to reproduce it again then please get back in touch and we'll try and work out what's happening. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 11, 2019, 12:31pm UTC](https://discuss.elastic.co/t/trouble-setting-up-an-elasticsearch-cluster/203245/8 "2019-11-11T12:31:21Z")
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