I have a VM running ELK 5.5.2. The VM was deployed based off ELK Certified by Bitnami image in Azure with mostly default settings and no pluggins. It is configured with 1 cluster and 1 node. Recently I noticed that all indices older than 1 month (4 weeks?) are missing from kibana discover page. If I run GET /_cat/indices?v, I only get previous 4 weeks of indices. I restored to an older backup of the VM and they all only show previous 4 weeks of indices.
The VM does not have Curator installed and I don't see an cron jobs on the VM that would delete the indices. Anyone have any ideas of why I am missing older indices.