How to upgrade Elasticsearch Deployment Template.

[nickkostov]

Hello,

I have been trying to upgrade the Elasticsearch version of my search configurations.
Current version is: 6.3.1.
I run this in an EKS cluster.

What I am asking is any tips regarding the upgrade.
When I firstly attempted to upgrade it failed.
I am trying to jump to >= 7.2
Is there a document showing how to update it, because I have started receiving feedback from our back-end developers stating that the application has been down for a whole day.
When I checked the logs find around 12/14 attempts of Fusion to connect to Elasticsearch.
Looking into the Elasticsearch logs shows that
[2022-03-03T05:04:55,070][WARN ][o.e.x.s.a.s.m.NativeRoleMappingStore] [PcFr0Jo] Failed to clear cache for realms [[]]

During the whole day Fusionauth was attempting to restart and connect and Elasticsearch was still trying start I guess.

[nickkostov]

If possible, can we update the default template inside the examples for search ?

[drpebcak]

I would advise following the upgrade procedures outlined by elastic. I believe you need to be on ~6.8 to upgrade to >=7.2. Here is a link to some documentation about it - https://www.elastic.co/guide/en/elasticsearch/reference/7.17/setup-upgrade.html