### Author:  [@Mohammad\_Mousavi](https://discuss.elastic.co/u/Mohammad_Mousavi)
#### Post date: [November 6, 2019, 6:48am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/1 "2019-11-06T06:48:03Z")
Hi, I have 1 elasticsearch node, I've installed another node in another DC. Now I wanna have a cluster between 2 node so data can be HA. Based on documentations I've added this config (on master):
```
cluster.name: mycluster
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: elastic-certificates.p12
node.name: node-1
node.master: true (it's false on node-2)
node.data: true
node.attr.rack: DC1
path.data: /data/elasticsearch
path.logs: /var/log/elasticsearch
network.host:
discovery.seed_hosts: ["node-1","node-2"]
cluster.initial_master_nodes: ["node-1"]
```
After restarting them, nothing happened. no changes. It's about config or something else ?
Thank You
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [November 6, 2019, 7:39am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/2 "2019-11-06T07:39:13Z")
In order for a cluster to be HA you need at least 3 nodes as Elasticsearch is based on consensus algorithms for leader election. 2 is not enough.
---
### Author:  [@Mohammad\_Mousavi](https://discuss.elastic.co/u/Mohammad_Mousavi)
#### Post date: [November 6, 2019, 7:53am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/3 "2019-11-06T07:53:58Z")
3 node, 2 data, 1 master you mean ? can I have all 3 be masters and data? I wanna have read/write on all nodes.
@Christian_Dahlqvist
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [November 6, 2019, 8:13am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/4 "2019-11-06T08:13:20Z")
3 nodes that are master r we legible and hold data (the default configuration).
---
### Author:  [@dschneiter](https://discuss.elastic.co/u/dschneiter)
#### Post date: [November 7, 2019, 4:11am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/5 "2019-11-07T04:11:58Z")
Please keep in mind, that an Elasticsearch cluster with nodes in different DCs is not a supported configuration.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [November 7, 2019, 6:13am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/6 "2019-11-07T06:13:26Z")
That is a good point. Elasticsearch requires very low latencies and good throughput between nodes. Well connected data centres in close proximity tend to work (think AWS AZ), but data centres in different regions will cause problems.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 5, 2019, 6:13am UTC](https://discuss.elastic.co/t/cluster-elasticsearch-on-basic-license/206733/7 "2019-12-05T06:13:29Z")
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