# Elasticsearch maintenance procedure

**URL:** <https://discuss.elastic.co/t/elasticsearch-maintenance-procedure/250465>\
**Category:** Elasticsearch\
**Created:** [September 30, 2020, 8:19am UTC](https://discuss.elastic.co/t/elasticsearch-maintenance-procedure/250465 "2020-09-30T08:19:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rschirin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rschirin/32/45283_2.png) [@rschirin](https://discuss.elastic.co/u/rschirin)\
**Post date:** [September 30, 2020, 8:19am UTC](https://discuss.elastic.co/t/elasticsearch-maintenance-procedure/250465/1 "2020-09-30T08:19:38Z")

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hi all,  
I'm starting to think about the correct procedure to apply security patches on the ES nodes (OS: CentOS).  
I have several clusters with different purpose but I focused on the most important; this cluster is composed in this way:

- 3 Master nodes
- 10 Data nodes
- 2 Coordinating-only nodes

generally, OS's security patches do not require server reboot but:

- should I set a specific parameter before to start the procedure?
- should I consider something particular to avoid any overload?

I suppose I will patch servers using this schema:

day1: 1 master and 2 data  
day2: 1 master and 2 data  
day3: 1 master and 2 data  
day4: 1 coord and 2 data  
day5: 1 coord and 2 data

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [September 30, 2020, 8:25am UTC](https://discuss.elastic.co/t/elasticsearch-maintenance-procedure/250465/2 "2020-09-30T08:25:08Z")

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The process described here can be applied to this approach - [https://www.elastic.co/guide/en/elasticsearch/reference/current/rolling-upgrades.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/rolling-upgrades.html)

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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:** [October 28, 2020, 8:25am UTC](https://discuss.elastic.co/t/elasticsearch-maintenance-procedure/250465/3 "2020-10-28T08:25:20Z")

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