# Not able to add data node to a elasticsearch cluster
**URL:** https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606
**Category:** Elasticsearch
**Created:** [October 23, 2018, 1:14pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606 "2018-10-23T13:14:12Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Loudone](https://discuss.elastic.co/u/Loudone)
#### Post date: [October 23, 2018, 1:14pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606/1 "2018-10-23T13:14:12Z")
Dear all,
I'm currently trying to make the following elasticsearch cluster:
My 3 master nodes are working fine, but my 3 others data nodes are not able to be connected to the masters:
error:
`[2018-10-23T14:59:41,287][WARN][o.e.d.z.ZenDiscovery] [Data_Node_1] not enough master nodes discovered during pinging (found [[]], but needed [3]), pinging again`
I trying to find a solution to have two node per vm, do you know how to do that?
Many tkanks for your help
below my actuals elasticsearch.yml configuration:
**Master 1:**
```
cluster.name: Ken_O_Bee
node.name: Master_1
node.master: true
node.data: true
path.data: /opt/node_data/master1
path.logs: /var/log/elasticsearch/master1
bootstrap.memory_lock: true
network.host: 172.20.10.7
network.bind_host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["172.20.10.7" , "172.20.10.6" , "172.20.10.5"]
discovery.zen.minimum_master_nodes: 2
xpack.security.enabled: false
xpack.monitoring.enabled: true
xpack.ml.enabled: false
xpack.graph.enabled: false
xpack.watcher.enabled: false
xpack.monitoring.collection.enabled: true
```
**Master 2:**
```
cluster.name: Ken_O_Bee
node.name: Master_2
node.master: true
node.data: true
path.data: /opt/node_data/master2
path.logs: /var/log/elasticsearch/master2
bootstrap.memory_lock: true
network.host: 172.20.10.6
network.bind_host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["172.20.10.7" , "172.20.10.6" , "172.20.10.5"]
discovery.zen.minimum_master_nodes: 2
xpack.security.enabled: false
xpack.monitoring.enabled: true
xpack.ml.enabled: false
xpack.graph.enabled: false
xpack.watcher.enabled: false
xpack.monitoring.collection.enabled: true
```
**Master 3:**
```
cluster.name: Ken_O_Bee
node.name: Master_3
node.master: true
node.data: true
path.data: /opt/node_data/master3
path.logs: /var/log/elasticsearch/master3
bootstrap.memory_lock: true
network.host: 172.20.10.5
network.bind_host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["172.20.10.7" , "172.20.10.6" , "172.20.10.5"]
discovery.zen.minimum_master_nodes: 2
xpack.security.enabled: false
xpack.monitoring.enabled: true
xpack.ml.enabled: false
xpack.graph.enabled: false
xpack.watcher.enabled: false
xpack.monitoring.collection.enabled: true
```
**Data\_node example:**
```
cluster.name: Ken_O_Bee
node.name: Data_Node_1
node.master: false
node.data: true
path.data: /opt/node_data/data_1
path.logs: /var/log/elasticsearch/data_node_1
bootstrap.memory_lock: true
network.bind_host: 0.0.0.0
http.port: 9201
transport.tcp.port: 9301
discovery.zen.ping.unicast.hosts: ["172.20.10.7" , "172.20.10.6" , "172.20.10.5"]
discovery.zen.minimum_master_nodes: 3
xpack.security.enabled: false
xpack.monitoring.enabled: true
xpack.ml.enabled: false
xpack.graph.enabled: false
xpack.watcher.enabled: false
xpack.monitoring.collection.enabled: true
```
---
### Author:  [@xavierfacq](https://discuss.elastic.co/u/xavierfacq)
#### Post date: [October 23, 2018, 1:18pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606/2 "2018-10-23T13:18:26Z")
Hi,
In your data nodes configuration you need to add the port of unicast master hosts :
```
discovery.zen.ping.unicast.hosts: ["172.20.10.7:9300" , "172.20.10.6:9300" , "172.20.10.5:9300"]
```
bye,
Xavier
---
### Author:  [@Loudone](https://discuss.elastic.co/u/Loudone)
#### Post date: [October 23, 2018, 1:29pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606/3 "2018-10-23T13:29:36Z")
> [@xavierfacq](#):
>
> you need to add the port of unicast master hosts :
Hi Xavier,
You're right!! is working, thank you for your quite response:
---
### Author:  [@xavierfacq](https://discuss.elastic.co/u/xavierfacq)
#### Post date: [October 23, 2018, 1:32pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606/4 "2018-10-23T13:32:54Z")
👍 good to hear that !
You can mark as resolved !
enjoy,
Xavier
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 20, 2018, 1:36pm UTC](https://discuss.elastic.co/t/not-able-to-add-data-node-to-a-elasticsearch-cluster/153606/5 "2018-11-20T13:36:13Z")
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