I've asked and talk about this on a few threads, but want to dial this in a bit more... My situation... We currently are running on ES 5.5.1 (Cluster Environment) on Ubuntu 16.04. Recently, we attempted to upgrade the OS of our servers to Ubuntu 18.04, but for some unknown reason, once the upgrad…

Ah, I misunderstood and thought you still had the 5.5.1 cluster running. If it's all stopped then you can start from 6.8.15 which can still read indices written by 5.x. That is, unless you also have indices from 2.x, if you still have any of them then you'll need to reindex them in 5.x first.

Can I just install the latest ES 7.x in my case?

Elastic Stack Elasticsearch

cis4life (Cedric Gaines) April 29, 2021, 6:52pm 3

OHHH, so I must first reinstall 5.5.1 then upgrade to 7.x. Ok, question… Will 5.5.1 run on Ubuntu 20.04 and is there an install guide if I need to reinstall 5.5.1?

Thanks,

Topic		Replies	Views
Moving From ES 5.x to 7.x and OS Upgrade Elasticsearch	7	515	May 26, 2021
Upgrade ElasticSearh from 5.5 to 7.1 Elasticsearch	12	1663	March 11, 2020
Upgrading 1.x to 7.5 Elasticsearch	3	506	January 2, 2020
Upgrade Elasticsearch from 5.x to 6.x, then 6.x to 7.x Elasticsearch	2	592	February 12, 2018
Before I pull the trigger on this upgrade Elasticsearch	3	515	April 10, 2017

Can I just install the latest ES 7.x in my case?

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