# Adding a node to a cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [March 26, 2019, 3:25pm UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958 "2019-03-26T15:25:50Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![sph18](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@sph18](https://discuss.elastic.co/u/sph18)\ **Post date:** [March 26, 2019, 3:25pm UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/1 "2019-03-26T15:25:50Z")
Hi all, I have a graylog server setup as a single host. Version are: Host - Ubuntu 18.04 Graylog - 3.0.0-12 Java - 1.8.0\_191 Elasticsearch - 6.6.2" MongoDB - 4.0.6 Apache - 2.4.29 So I'm I want to add a node the a single cluster. I set up the new host, specs are: Host - Ubuntu 18.04 Java - 1.8.0\_191 Elasticsearch - 6.6.2" I edited my /etc/elasticsearch/elasticsearch.yml and it looks like this: > cluster.name: graylog > node.name: crow > node.data: true > > path.logs: /var/log/elasticsearch > > discovery.zen.ping.unicast.hosts: ["172.24.228.161","172.24.228.226"] .161 is my single graylog server and 226 is the new node. ES has been restarted. I have then edited my single graylog ES conf, which looks like this: > cluster.name: graylog > action.auto\_create\_index: false > node.master: true > > node.name: grayone > > path.logs: /var/log/elasticsearch > > discovery.zen.ping.unicast.hosts: ["172.24.228.161","172.24.228.226"] Config based on ES guide - > **[Adding nodes to your cluster | Elasticsearch Guide \[6.6\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/6.6/add-elasticsearch-nodes.html)** > **[Node | Elasticsearch Guide \[6.6\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/6.6/modules-node.html)** But when I go into graylog and check nodes the new one is not there. Doing a ``` curl -XGET '[http://127.0.0.1:9200/\_cluster/health?pretty=true](http://127.0.0.1:9200/_cluster/health?pretty=true)' ```auto > { > "cluster_name" : "graylog", > "status" : "green", > "timed_out" : false, > "number_of_nodes" : 1, > "number_of_data_nodes" : 1, > "active_primary_shards" : 28, > "active_shards" : 28, > "relocating_shards" : 0, > "initializing_shards" : 0, > "unassigned_shards" : 0, > "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" : 100.0 > } Both servers can ping each other. There aren't any errors in the graylog.log on either host Have I missed something in the config? ``` ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 26, 2019, 3:40pm UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/2 "2019-03-26T15:40:20Z")
Most likely you missed `network.host` setting. ---
**Author:** ![sph18](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@sph18](https://discuss.elastic.co/u/sph18)\ **Post date:** [March 26, 2019, 4:19pm UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/3 "2019-03-26T16:19:44Z")
Thanks for the reply dadoonet. I've added in network.host:IP on both hosts, but not getting some errors. When running curl -XGET '[http://127.0.0.1:9200/\_cluster/health?pretty=true](http://127.0.0.1:9200/_cluster/health?pretty=true)' I get back: > curl: (7) Failed to connect to 127.0.0.1 port 9200: Connection refused and checking the ES logs and I'm getting > [2019-03-26T16:11:34,499][INFO][o.e.d.z.ZenDiscovery] [grayone] failed to send join request to master [{crow}{KQtVL-x1TbWLGcvDiGyXLA}{4\_Ae58sDRty8Dwa6i-Zouw}{172.24.228.226}{172.24.228.226:9300}{ml.machine\_memory=67529670656, ml.max\_open\_jobs=20, xpack.installed=true, ml.enabled=true}], reason [RemoteTransportException[[crow][172.24.228.226:9300][internal:discovery/zen/join]]; nested: IllegalStateException[failure when sending a validation request to node]; nested: RemoteTransportException[[grayone][172.24.228.161:9300][internal:discovery/zen/join/validate]]; nested: IllegalArgumentException[Unknown NamedWriteable [org.elasticsearch.cluster.metadata.MetaData$Custom][licenses]]; ] From that I can see it's failing because of "RemoteTransportException", but I've not come across it in the documentation (sorry new the ES) ? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 26, 2019, 11:10pm UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/4 "2019-03-26T23:10:32Z")
Please format your code, logs or configuration files using `` icon as explained in [this guide](https://discuss.elastic.co/t/about-the-elasticsearch-category/21) and not the citation button. It will make your post more readable. Or use markdown style like: ```` ``` CODE ``` ```` This is the icon to use if you are not using markdown format: ![image](https://us1.discourse-cdn.com/elastic/original/3X/7/e/7e6e239431ec2d71cbf1beef741f2e93e7cc762c.jpg) Few things: Your node is now listening on a given IP. You can't query it using `127.0.0.1`. See the logs to see the http address and port. It's failing to join the cluster because of an unknown setting or something like this. Not sure what it is. ---
**Author:** ![mujtabahussain](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mujtabahussain/32/17514_2.png) [@mujtabahussain](https://discuss.elastic.co/u/mujtabahussain)\ **Post date:** [March 27, 2019, 4:25am UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/5 "2019-03-27T04:25:56Z")
Can you telnet between the hosts on ports 9200 and 9300? ---
**Author:** ![sph18](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@sph18](https://discuss.elastic.co/u/sph18)\ **Post date:** [March 27, 2019, 8:57am UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/6 "2019-03-27T08:57:13Z")
Apologies dadoonet, Have read now. OK so I when through the ES conf and there was no ref to 127. Checking the Graylog conf there was a 127 address in the "List of Elasticsearch hosts Graylog should connect to." I've changed the setting to be: > Default: [http://172.24.228.226:9200](http://172.24.228.226:9200),[http://172.24.228.161:9200](http://172.24.228.161:9200) also enabled is > elasticsearch\_discovery\_enabled = true This is a warning with this setting > WARNING: Automatic node discovery does not work if Elasticsearch requires authentication, e. g. with Shield But I have not set up any authentication Checking back in the logs on the graylog its states `[2019-03-27T08:45:00,934][INFO][o.e.d.z.ZenDiscovery] [grayone] failed to send join request to master [{crow}{KQtVL-x1TbWLGcvDiGyXLA}{4_Ae58sDRty8Dwa6i-Zouw}{172.24.228.226}{172.24.228.226:9300}{ml.machine_memory=67529670656, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true}], reason [RemoteTransportException[[crow][172.24.228.226:9300][internal:discovery/zen/join]]; nested: IllegalStateException[failure when sending a validation request to node]; nested: RemoteTransportException[[grayone][172.24.228.161:9300][internal:discovery/zen/join/validate]]; nested: IllegalArgumentException[Unknown NamedWriteable [org.elasticsearch.cluster.metadata.MetaData$Custom][licenses]]; ]` From that It looks like its failing because of the validation request it trying to make, but I'm not sure what the validation is? ---
**Author:** ![sph18](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@sph18](https://discuss.elastic.co/u/sph18)\ **Post date:** [March 27, 2019, 8:58am UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/7 "2019-03-27T08:58:11Z")
Hi mujtabahussain, Yea I can telnet to both 9200 and 9300 on both nodes. I can nav in the browser to [http://172.24.228.161:9200/](http://172.24.228.161:9200/) and get my ES info and when going to 9300 I get back > This is not an HTTP port ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 24, 2019, 8:58am UTC](https://discuss.elastic.co/t/adding-a-node-to-a-cluster/173958/8 "2019-04-24T08:58:16Z")
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