Migrate Elastic indexes betwewn v6 and v8

Elastic Stack Elasticsearch
1

Hello,

I currently have a Stack ELK with version 6.x of Elastic whose data we want I have to migrate to v8.x. I want to migrate only the indexes. With dumps I have seen that it is impossible to do it directly without going through v7. What would be the best way to do it?

I had thought of creating a logstash pipeline between the two Elastic clusters, is this feasible in these versions?

Thank you very much.

2

Have you looked into reindexing the data from the remote cluster using the reindex API?

1 Like
3

Is this now effectively a static data set, i.e. the indices are what they are, and not changing. There is no further ingest on the 6.x cluster ?

1 Like
4

yes, they are static data.

5

I did not know this solution, it looks good, thank you very much!

6

I would like to add more information for completeness and ask for guidance on using the reindexing API. The source elastic is on on-premise machines (v6) but the target elastic is on kubernetes(v8). Is there any way to easily configure SSL for this scenario? Any additional advice?

7

security risks/decisions are yours, but I used

reindex.ssl.verification_mode: none

in my elasticsearch.yml on the destination side when faced with a similar issue, noting also the reindex.remote.whitelist setting needed set. And I didn't got v6-->v8, in fact went v9-->v8, and nothing left my home LAN. YMMV.