Cozystack Storage Deep Dive
summary
Cozystack uses LINSTOR as the control plane and kernel‑level DRBD for block replication; demo runs on a 3-node cluster with 642 GB total, 162 GB used and ~60 volumes. It provisions replicated PVCs (default 3 copies), local PVCs, supports Kubernetes snapshots (and Velero backups), exposes Grafana metrics, and now offers RWX support via a replicated storage class. Snapshots freeze IO with DRBD suspend, LVM/CFS are supported (thin‑pool caveat), and disk failures cause DRBD to detach requiring resync.
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chapters (10)
- 0:00Cozystack storage intro
- 3:37Why Perios Data Store
- 5:03Storage stack & replication
- 9:09Live demo & LinStore
- 12:51Storage classes & PVC
- 16:23Monitoring & Grafana
- 17:07Snapshots management
- 18:39K8s storage integration
- 21:05ReadWriteMany volumes
- 22:56Q&A
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