I want upgrade ELS6.8 to 7.9 (only one ELS, I don’t have cluster)
Graylog version: 4.0.1
I have one VM for each server.
Actually, that work, but Graylog 4 is very slow and I have lot of Time out on dashboards.
For this reason, I have to upgrade Elasticsearch.
However, This ELS was born with version 5, and there is long time an upgrade to ELS6 was effected, but without considering the database conversion.
So today i want to do it using the best practice.
I read this: Upgrade Elasticsearch | Elasticsearch Reference [7.9] | Elastic
But I don’t understand all step.
Considering I just have one ELS, what are the manipulation to do it?
I can stop my input without problem, and maybe I have to close indices?