# Es Rolling Upgrade qustion from 5.5. to 5.6

**URL:** <https://discuss.elastic.co/t/es-rolling-upgrade-qustion-from-5-5-to-5-6/134519>\
**Category:** Elasticsearch\
**Created:** [June 5, 2018, 5:11am UTC](https://discuss.elastic.co/t/es-rolling-upgrade-qustion-from-5-5-to-5-6/134519 "2018-06-05T05:11:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lks21c](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lks21c/32/15218_2.png) [@lks21c](https://discuss.elastic.co/u/lks21c)\
**Post date:** [June 5, 2018, 5:11am UTC](https://discuss.elastic.co/t/es-rolling-upgrade-qustion-from-5-5-to-5-6/134519/1 "2018-06-05T05:11:27Z")

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Hi, guys.

I maintain a ES cluster which has 16 nodes.  
(3 master, 11 data, 2 clients)

**My question is that which sequence do I need to do a rolling upgrade among 3 types of node.**

I'm supposed to upgrade data nodes first and client nodes and finally master nodes.

I guess if I upgrade master nodes first, my cluster would be changed to 5.6 cluster  
as a result, I think it would be hard to connect 5.5 data nodes into 5.6 master.

So I want to verity that wheather I need a sequence to do a rolling upgrade or not.

Thanks you every time for a smart answers. 🙂

P.S. I also want to apply x-pack plugin BTW, does it make sense to conform the same sequence as I do a rolling upgrade?

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<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:** [July 3, 2018, 5:11am UTC](https://discuss.elastic.co/t/es-rolling-upgrade-qustion-from-5-5-to-5-6/134519/2 "2018-07-03T05:11:29Z")

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