There are approximately 4,000 indices in Elasticsearch, all of which are in an open state. However, during the scheduled backup, only 1,660 indices were successfully backed up, while the remaining ones were ignored. Upon comparison, the key difference identified was the presence of ILM (Index Lifecy…

I believe Curator by default deliberately does not work on indices associated with ILM policies . As shown in the docs I linked to it is possible to override this default behaviour. I would recommend trying this, as I have not personally used this.

Indices with ILM policies are not included in Snapshot and Restore Operations

Elastic Stack Elasticsearch

leandrojmp (Leandro Pereira) July 25, 2025, 12:50pm 5

How is the snapshot backup being generated? You need a Snapshot policy to create the snapshots.

What do you have in Kibana when you go to Stack Management > Snapshot and Restore > Policies ? This should list your policies.

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Indices with ILM policies are not included in Snapshot and Restore Operations

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