# Can we have 1 master only node and 2 data only node in a 3 nodes cluster

**URL:** <https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662>\
**Category:** Elasticsearch\
**Created:** [September 2, 2019, 9:52am UTC](https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662 "2019-09-02T09:52:14Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ayush\_Verma](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ayush_verma/32/46709_2.png) [@Ayush\_Verma](https://discuss.elastic.co/u/Ayush_Verma)\
**Post date:** [September 2, 2019, 9:52am UTC](https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662/1 "2019-09-02T09:52:14Z")

</div>

I am using elasticsearch 7.3, I have 3 node in total, i try to have to 1 master only node and 2 data only nodes. But this configuration is not working, but when i also configure other node as master node then it start working.

**node-1 yml**

```
cluster.name: ElasticsearchStaging
node.name: node-1
node.master: false
node.data: true

```

**node-2 yml**

```
cluster.name: ElasticsearchStaging
node.name: node-2
node.master: false
node.data: true

```

**node-3 yml**

```
cluster.name: ElasticsearchStaging
node.name: node-3
node.master: true
node.data: false

```

when i set this config its not working.

also my kibana is not wokring.

**kibana.log**

```
{"type":"log","@timestamp":"2019-09-02T10:31:29Z","tags":["warning","stats-collection"],"pid":8291,"message":"Unable to fetch data from spaces collector"}
{"type":"log","@timestamp":"2019-09-02T10:31:30Z","tags":["error","task_manager"],"pid":8291,"message":"Failed to poll for work: [search_phase_execution_exception] all shards 
failed :: {\"path\":\"/.kibana_task_manager/_search\",\"query\":{\"ignore_unavailable\":true},\"body\":\"{\\\"query\\\":{\\\"bool\\\":{\\\"must\\\":[{\\\"term\\\":{\\\"type\\\
":\\\"task\\\"}},{\\\"bool\\\":{\\\"must\\\":[{\\\"terms\\\":{\\\"task.taskType\\\":[\\\"maps_telemetry\\\",\\\"vis_telemetry\\\",\\\"actions:.server-log\\\",\\\"actions:.slac
k\\\",\\\"actions:.email\\\"]}},{\\\"range\\\":{\\\"task.attempts\\\":{\\\"lte\\\":3}}},{\\\"range\\\":{\\\"task.runAt\\\":{\\\"lte\\\":\\\"now\\\"}}},{\\\"range\\\":{\\\"kiba
na.apiVersion\\\":{\\\"lte\\\":1}}}]}}]}},\\\"size\\\":10,\\\"sort\\\":{\\\"task.runAt\\\":{\\\"order\\\":\\\"asc\\\"}},\\\"seq_no_primary_term\\\":true}\",\"statusCode\":503,
\"response\":\"{\\\"error\\\":{\\\"root_cause\\\":[],\\\"type\\\":\\\"search_phase_execution_exception\\\",\\\"reason\\\":\\\"all shards failed\\\",\\\"phase\\\":\\\"query\\\"
,\\\"grouped\\\":true,\\\"failed_shards\\\":[]},\\\"status\\\":503}\"}"}
{"type":"log","@timestamp":"2019-09-02T10:31:31Z","tags":["status","plugin:spaces@7.3.0","error"],"pid":8291,"state":"red","message":"Status changed from yellow to red - all s
hards failed: [search_phase_execution_exception] all shards failed","prevState":"yellow","prevMsg":"Waiting for Elasticsearch"}
{"type":"log","@timestamp":"2019-09-02T10:31:31Z","tags":["fatal","root"],"pid":8291,"message":"{ [search_phase_execution_exception] all shards failed :: {\"path\":\"/.kibana/
_count\",\"query\":{},\"body\":\"{\\\"query\\\":{\\\"bool\\\":{\\\"should\\\":[{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{\\\"field\\\":\\\"graph-workspace\\\"}},{\\\"bool\
\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.graph-workspace\\\":\\\"7.0.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{\\\"field\\\":\\\"space\\\"}},
{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.space\\\":\\\"6.6.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{\\\"field\\\":\\\"map\\\"}},{\
\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.map\\\":\\\"7.2.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{\\\"field\\\":\\\"canvas-workpad\\
\"}},{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.canvas-workpad\\\":\\\"7.0.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{\\\"field\\\":\\
\"index-pattern\\\"}},{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.index-pattern\\\":\\\"6.5.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{\\\"exists\\\":{
\\\"field\\\":\\\"visualization\\\"}},{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.visualization\\\":\\\"7.3.0\\\"}}}}]}},{\\\"bool\\\":{\\\"must\\\":[{
\\\"exists\\\":{\\\"field\\\":\\\"dashboard\\\"}},{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.dashboard\\\":\\\"7.3.0\\\"}}}}]}},{\\\"bool\\\":{\\\"mus
t\\\":[{\\\"exists\\\":{\\\"field\\\":\\\"search\\\"}},{\\\"bool\\\":{\\\"must_not\\\":{\\\"term\\\":{\\\"migrationVersion.search\\\":\\\"7.0.0\\\"}}}}]}}]}}}\",\"statusCode\"
:503,\"response\":\"{\\\"error\\\":{\\\"root_cause\\\":[],\\\"type\\\":\\\"search_phase_execution_exception\\\",\\\"reason\\\":\\\"all shards failed\\\",\\\"phase\\\":\\\"quer
y\\\",\\\"grouped\\\":true,\\\"failed_shards\\\":[]},\\\"status\\\":503}\"}\n at respond (/usr/share/kibana/node_modules/elasticsearch/src/lib/transport.js:315:15)\n at 
checkRespForFailure (/usr/share/kibana/node_modules/elasticsearch/src/lib/transport.js:274:7)\n at HttpConnector.<anonymous> (/usr/share/kibana/node_modules/elasticsearch/s
rc/lib/connectors/http.js:166:7)\n at IncomingMessage.wrapper (/usr/share/kibana/node_modules/elasticsearch/node_modules/lodash/lodash.js:4929:19)\n at IncomingMessage.e
mit (events.js:194:15)\n at endReadableNT (_stream_readable.js:1103:12)\n at process._tickCallback (internal/process/next_tick.js:63:19)\n status: 503,\n displayName: 
'ServiceUnavailable',\n message:\n 'all shards failed: [search_phase_execution_exception] all shards failed',\n path: '/.kibana/_count',\n query: {},\n body:\n { error
:\n { root_cause: [],\n type: 'search_phase_execution_exception',\n reason: 'all shards failed',\n phase: 'query',\n grouped: true,\n f
ailed_shards: [] },\n status: 503 },\n statusCode: 503,\n response:\n '{\"error\":{\"root_cause\":[],\"type\":\"search_phase_execution_exception\",\"reason\":\"all sha
rds failed\",\"phase\":\"query\",\"grouped\":true,\"failed_shards\":[]},\"status\":503}',\n toString: [Function],\n toJSON: [Function],\n isBoom: true,\n isServer: true,\n
  data: null,\n output:\n { statusCode: 503,\n payload:\n { message:\n 'all shards failed: [search_phase_execution_exception] all shards failed',\n        
statusCode: 503,\n error: 'Service Unavailable' },\n headers: {} },\n reformat: [Function],\n [Symbol(SavedObjectsClientErrorCode)]: 'SavedObjectsClient/esUnavail
able' }"}
```

---

<div class="post-metadata">

**Author:** ![yash.tandon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yash.tandon/32/53428_2.png) [@yash.tandon](https://discuss.elastic.co/u/yash.tandon)\
**Post date:** [September 2, 2019, 1:33pm UTC](https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662/2 "2019-09-02T13:33:52Z")

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Yes, it is possible to have only a dedicated master node and two data nodes in your ES cluster. You must have done some mistakes while configuring the ES cluster .  
Configure these options in your yml file.

discovery.seed\_hosts: ["master\_node\_ip"]  
cluster.initial\_master\_nodes: ["master\_node\_ip"]  
also provide a same cluster name across all nodes then you will be good to go.  
at last restart your service and check the cluster state, goto https://master\_node\_ip:9200/\_cluster/state

---

<div class="post-metadata">

**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:** [September 2, 2019, 2:46pm UTC](https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662/3 "2019-09-02T14:46:35Z")

</div>

> [@yash.tandon](#):
>
> cluster.initial\_master\_nodes: ["master\_node\_ip"]

`cluster.initial_master_nodes` should normally be set to the `node.name` of the master node(s), not their IP address(es). It's technically possible to use either, but using the IP address(es) seems to cause a good deal of confusion so the node name is the recommended practice.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 30, 2019, 2:58pm UTC](https://discuss.elastic.co/t/can-we-have-1-master-only-node-and-2-data-only-node-in-a-3-nodes-cluster/197662/4 "2019-09-30T14:58:53Z")

</div>

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