# Elastic search host unreachable

**URL:** <https://discuss.elastic.co/t/elastic-search-host-unreachable/175963>\
**Category:** Elasticsearch\
**Created:** [April 9, 2019, 6:48am UTC](https://discuss.elastic.co/t/elastic-search-host-unreachable/175963 "2019-04-09T06:48:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![safderali5](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@safderali5](https://discuss.elastic.co/u/safderali5)\
**Post date:** [April 9, 2019, 6:48am UTC](https://discuss.elastic.co/t/elastic-search-host-unreachable/175963/1 "2019-04-09T06:48:40Z")

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I am running elasticsearch and logstash in kubernetes. I used statefulset to run ealsticsearch data nodes. The problem arise when i try to upgrade data nodes using rolling upgrade, the logstash cannot connect to elastic search even when only one data node is down. I have 3 data nodes cluster exposed to logstash using kubernetes service. any suggestion?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 7, 2019, 6:48am UTC](https://discuss.elastic.co/t/elastic-search-host-unreachable/175963/2 "2019-05-07T06:48:47Z")

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Closed on May 7, 2019, 6:48am UTC

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