I have an index on elasticsearch v7.17 and I want to upgrade my cluster to v8. I know remote reindexing is an option but because of my data size I want to avoid it. My elasticsearch deployment is on the Elastic Cloud. It is not self-managed. I created a custom S3 repository and registered to both my deployments 7.17 and 8.15.
The issue is that any snapshot I create on the 8.15 deployment is visible on both the deployments but then the snapshot created on 7.17 is not visible on the 8.15 deployment.
I tried creating the complete snapshot, including all the indices, global state etc on 7.17, but it was not listing down in the snapshots on 8.15. So, I tried to create the snapshot only for the index I want to restore say "Index-A" using
PUT _snapshot/<<repo>>/my-snapshot
{
"indices": "Index-A",
"include_global_state": false,
"ignore_unavailable": true
}
Even after this the snapshot did not show up on the 8.15 deployment?
So my question is: Is the snapshot created on 7.17 available to restore on v8.x or is there something else that I am missing?
I figured out the reason for the snapshots not showing up on the 8.x deployment. The repository I registered was not set to read-only on the 8.x cluster. Once I edited the repository and set it as read-only on the 8.x cluster, all the snapshots started to show up. Read Only Warning for Repositories
