Elasticsearch upgrade from 5.2 to 7.2

Elastic Stack Elasticsearch
1

Hello ,

I'm trying to upgrade elasticsearch cluster from 5.2 to 7.2
After reading the docs ( correct me if I'm wrong ) , here's what I concluded:

  • upgrade from 5.2 to 5.6
  • upgrade from 5.6 to 6.x
  • upgrade from 6.x to 7.2

Naturally ,every upgrade should be realized on each node of the cluster and then a full cluster restart.( a lot of work )
My question is the following :
Should I reindex all index on each step on each node ( lets say I have 10 nodes )
How to reindex all my index with one shot ( I have more than 500 index )
Each index has a different mapping and a different name ( I want to avoid to manually reindex everything)

Best regards ,
MOKA

2

IMHO the easiest path is to start a new cluster running 7.2 and use the reindex from remote API to read the old data from your 5.2 cluster and reindex in 7.2.

3

Thanks for your reply.Thats the quickest most efficient way I think
So, back to my first question :
Should I reindex all index each node or only on master?
How to reindex all my indexes without the manual labor ( I have more than 500 indexes)?

4

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.