Storage

Longhorn replicates PVCs across k3s nodes. On a single physical host, all three replicas live on the same NVMe. When a node failed, Longhorn's Multi-Attach error locked out every pod that needed the volume. NFS was the fix.

Garage S3's SQLite database corrupted because NFS file-locking semantics don't work with SQLite's WAL mode. The lesson: embedded databases and NFS are incompatible, and the fix is local-path for anything with a .db file.