docs/stacks/storage.md

# Storage layout

> Verified state as of 2026-05-21. Source of truth for which service lives on which storage class.
> Earlier revisions of this doc were stale on multiple items (Garage, n8n, Arcane, Karakeep, Pocket-ID, arr-stack, Nextcloud's storage protocol, missing Coder/Gitea). Reconciled via live audit.

## Storage classes

| Class | Substrate | Where | Typical use |
|---|---|---|---|
| Local zfs (rootfs) | NVMe in nuc | `/opt/stacks/<stack>/` on each LXC | Tier-1 hot state: databases, SQLite, secret stores, anything latency-sensitive |
| Local zfs (subvol) | NVMe in nuc | `rpool/data/subvol-<NNN>-disk-0` per LXC | Container rootfs, image cache |
| Docker named volume | NVMe in nuc | `/var/lib/docker/volumes/...` on each Docker CT | Per-container persistent state managed by Docker |
| UNAS over **NFSv3** | `192.168.1.31` | `/mnt/pve/unas` on CTs 101, 103, 104, 111 | Bulk media, workspace home dirs, document storage |
| UNAS over **CIFS/SMB 3.1.1** | `192.168.1.31` | `/mnt/pve/unas` on CT 105 (Nextcloud) | Nextcloud-only path — earlier docs mis-labelled this as NFS |

## What lives where (verified 2026-05-21)

### UNAS NFS — `/mnt/pve/unas/services/...`

Bulk + media + non-latency-sensitive app data.

| Service | CT | Path on UNAS → in container | Backed up? | Notes |
|---|---|---|---|---|
| Immich (uploads, thumbs, derived) | 104 | `services/immich/{encoded-video,profile,thumbs}` + `media/images` + `backup/immich` | Immich own pg_dump → `media/images/db-dumps`; no off-host copy | |
| Paperless-ngx (documents) | 104 | `media/documents/public/paperless-ngx/{consume,export,library}` | none | |
| Paperless-AI | 104 | `services/paperless-ai` → `/app/data` | none | |
| Vaultwarden (attachments + SQLite DB) | 104 | `services/vaultwarden` → `/data` | none | tier-1 DB on NFS — risky, plan to move local |
| Traccar (logs, config) | 104 | `services/traccar/{logs,traccar.xml}` | none | data dir reverted to local `/opt/stacks/traccar/data` |
| Memos | 104 | `services/memos` → `/var/opt/memos` | none | |
| Arr-stack (Audiobookshelf, Prowlarr, RDTClient, Shelfarr) + media | 104 | `services/arr-stack/*` + `media/{audiobooks,ebooks,podcasts,Torrents}` | none | already migrated (older doc claimed "still local") |
| Gluetun (VPN) | 104 | `services/gluetun/data` → `/gluetun` | none | |
| Gitea | 111 | `services/gitea` → `/data` | none | new 2026-05-20 |
| Coder workspace home dirs | 111 | `services/coder/<user>/<workspace>` → `/home/<user>` | none | new 2026-05-20 |
| Backrest's jottacloud-mirrored data | 103 | `media/data-dir` only | **rclone → jottacloud (Backrest)** | only path with off-host backup |

### Local zfs — `/opt/stacks/...`

Tier-1 state and anything that should NOT be NFS-backed.

| Service | CT | Local path → in container | Backed up? | Notes |
|---|---|---|---|---|
| Pocket-ID | **110** | `/opt/stacks/pocketid/data` → `/app/data` | none | CT 110 has no NFS mount at all. Earlier doc said UNAS — incorrect. |
| Garage (S3 meta + data) | 104 | `/opt/stacks/shared-db/garage/{data,meta}` → `/var/lib/garage/*` | none | **moved off NFS** 2026-05-19 after WAL-G outage. Stale copy may still exist on UNAS. |
| Shared Postgres (multi-stack) | 104 | docker named volume `shared-db_shared-pgdata` | **WAL-G → local Garage** (configured; outage 2026-05-19 prompted move) | Garage itself is single-disk local — no off-host copy. |
| n8n | 104 | `/opt/stacks/n8n/data` → `/home/node/.n8n` | none | **back to local** after PG migration attempt failed. Stale 408 MB `database.sqlite` left on UNAS (May 15) — clean up. n8n now uses `shared-postgres` as its actual DB. |
| Arcane | 104 | `/opt/stacks/arcane/data` → `/app/data` | none | reverted from UNAS to local 2026-05-19 (undocumented before now) |
| Karakeep + Meilisearch | 104 | `/opt/stacks/karakeep/localdata/{data,meili}` | none | reverted from UNAS to local |
| Immich Postgres (pgvector) | 104 | `/opt/stacks/immich/postgres` → `/var/lib/postgresql/data` | Immich pg_dump → UNAS | tier-1; PG demands local disk |
| Homepage | 104 | `/opt/stacks/homepage/{config,icons}` | none | |
| Dozzle | 104 | `/opt/stacks/dozzle/dozzle_data` | none | |
| LiteLLM config | 104 | `/opt/stacks/ai/litellm-config` | none | |
| SearXNG config | 104 | `/opt/stacks/ai/searxng` | none | |
| Flaresolverr | 104 | `/var/lib/flaresolver` | none | |
| AdGuard / Zoraxy / DNS / Shepard / Backrest binaries | 102/108/103/101 | local zfs only | none | Backrest itself has no self-backup |
| Nextcloud config + sidecars | 105 | local zfs (CT rootfs) | none | data path is CIFS — see below |

### Docker named volumes

Local on `/var/lib/docker/volumes/`. Mostly databases and caches.

| Volume | Service / CT | Backed up? |
|---|---|---|
| `shared-db_shared-pgdata` | shared-postgres / 104 | WAL-G → local Garage |
| `paperless-ngx_pgdata`, `_redisdata`, `_data` | paperless-ngx / 104 | none |
| `lobe-postgres` + `lobe-redis` | lobehub / 104 | none |
| `nuc-ai-core_rustfs-data` | lobehub stack / 104 | none |
| `pgadmin-data` | pgadmin / 104 | none (regenerable) |
| `immich_model-cache` | immich-ml / 104 | regenerable |
| `coder-db` + `gitea-db` (docker volume `coder-db`) | / 111 | none |
| (orphaned) `daytona-minimal_db_data` + runner anon vol | / 104 | none — clean up post-decommission |

### Nextcloud (CT 105) — the CIFS outlier

Nextcloud AIO mounts `//192.168.1.31/storage` over **CIFS/SMB 3.1.1**, not NFS like every other CT. Application data path is under that mount. The Postgres + Redis sidecars stay on local docker volumes.

## Backup reality

**There is effectively no off-host backup of service data.** The only configured Backrest plan covers `/mnt/pve/unas/media/data-dir → jottacloud` — i.e., Backrest backs up *one specific UNAS path*, not the services that write to UNAS.

Coverage:

- Immich pg_dump → UNAS (same filer; survives container loss, not filer loss)
- shared-postgres WAL-G → Garage (same host; survives container loss, not disk loss)
- Everything else: zero

This is a known gap. Plans:
1. Extend Backrest plans to snapshot tier-1 paths (Pocket-ID sqlite, Vaultwarden data, Gitea repos, Coder workspace homes) to jottacloud nightly.
2. Once the second NVMe lands (see `infra/proxmox-state.md` §6), mirror `rpool` so a single disk death doesn't take everything.

## Drift cleanup TODO

- [ ] Remove stale `services/n8n/database.sqlite` (408 MB, last write 2026-05-15) from UNAS.
- [ ] Remove stale `services/shared-db/garage/` copy from UNAS if present.
- [ ] Remove orphaned `daytona-minimal_db_data` Docker volume on CT 104.
- [ ] Vaultwarden `data/` on UNAS — plan to migrate to local zfs (latency + tier-1).
- [ ] Add a Backrest plan for Pocket-ID DB and Gitea data → jottacloud.