Migrate elasticsearch 7.10.2 PV to OpenSearch 5.2

[virasana]

Hi All,

Please could you advise how I would restore existing data. I originally used the helm chart here: https://github.com/opensearch-project/helm-charts.

Additionally, the source data is on elastic search 7.10.2. I want to migrate to opensearch 5.2.

I am using a PV pointing to Azure disk.

I am thinking to scale down the master statefulset, stand up a new PV and recreate the PVC to point to the new PV.

Hopefully, the upgrade from ElasticSearch to Opensearch will be automatic?

There are really two issues here. 1. Replace existing PVC. 2. Upgrade from ElasticSearch to OpenSearch.

Will this work?

Many Thanks!

I now want to restore the master instances.

Many Thanks

[up2neck]

@virasana
Hello, as far as I know Opensearch supports Elasticsearch snapshots up to 7.11 version.

So it would probably better to:

• Configure snapshot repository for Elasticsearch cluster (S3, GCS, etc.)
• Take snapshot of indices you want to migrate to OpenSearch cluster
• Bootstrap OpenSearch cluster
• Configure snapshot repository for OpenSearch cluster (with same configuration as it was done for Elasticsearch)
• Restore data to OpenSearch cluster

More info: https://opensearch.org/docs/latest/tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore/

[prudhvigodithi]

Thanks @up2neck, moving this issue to https://github.com/opensearch-project/opensearch-migrations repo for some more suggestions.
Thank you
@peternied

[peternied]

@virasana Thanks for the questions. Migrations is focused on copying data from an existing cluster onto a fresh cluster, checkout our wiki [1] on what the toolset offers. The suggestions from @up2neck are great as well.

Since this issue isn't a bug report or feature request I'm closing out this issue. Please consider looking at the forums [2] or starting a discussion on our slack workspace [3].

• [1] https://github.com/opensearch-project/opensearch-migrations/wiki
• [2] https://forum.opensearch.org/
• [3] https://opensearch.org/slack.html