# Prod: ks4

Incus host at OVH — public-facing self-hosted services.

- Debian 13, Xeon D-1521 / 32 GiB, 2× 6 TB (OS on mdraid RAID1,
  ZFS pool `data` on `sda5`) — setup & rebuild:
  [install.md](install.md)
- SSH: `ssh -i id_rsa_claude -p 2233 julien@193.70.35.17`
  (`julien` has passwordless `sudo incus …`, including
  `sudo incus exec …`; the backup crons themselves run as root)
- Instances are on a NAT bridge `incusbr0` (192.168.1.0/24); public
  ingress via Incus proxy devices. `gateway` (nginx) is the sole HTTP/S
  entry point and fans out to the app containers.
- Services: gateway, mail, nextcloud, seafile, git, freshrss, bitwarden,
  outline, login (SSO), wireguard, + more — full table in
  [install.md](install.md).
- ⚠️ The ZFS `data` pool is single-disk (not mirrored); durability
  rests on nightly cron jobs — 01:00 `incus copy --refresh` of all
  instances to the local `backup` pool on sdb5, then the instance leg
  to S3; 05:00 restic (DB dumps + data trees) to S3; nuc pulls the
  replicas over WireGuard. Full picture and restore procedures:
  **[backup-strategy.md](../backup-strategy.md)**
  ([local-backup-cron.md](local-backup-cron.md),
  [incus-copy.md](incus-copy.md),
  [restic-backup.md](restic-backup.md)).

## Network flows (nuc ↔ ks4)

```
  nuc — home LAN 192.168.0.0/24                    ks4 — OVH 193.70.35.17
+-----------------------------------+       +-------------------------------------+
|                                   |       |                                     |
| host: wg-ks4 (10.8.0.20)          |       |  [wireguard] 192.168.1.18           |
|   incus remote "ks4"        ------+--WG-->|   wg0 10.8.0.1/24, udp 51845        |
|   pull ks4:* -> pool ks4backup    | udp   |    | masquerade -> eth0             |
|   on usb4t  [pending FTTH seed]   | 51845 |    |                                |
|                                   |       |    +-> incus API 192.168.1.1:8443   |
| [transmission-bt] wg0 (10.8.0.21) |       |    |   (ufw: only from .18)         |
|   full tunnel 0.0.0.0/0     ------+--WG-->|    |                                |
|   kill switch: no default route   | udp   |    +-> WAN egress: torrents +       |
|   downloads -> /srv/media         | 51845 |        apt of transmission-bt       |
|   (usb4t/media, read by jellyfin) |       |        exit as 193.70.35.17         |
|                                   |       |                                     |
| 03:00 instance snapshots          |       | 03:00 instance snapshots            |
| 03:30 incus-copy: all instances   |       | 01:00 incus-copy: all instances     |
|   -> project backup, pool         |       |   -> project backup, zpool sdb5     |
|   nucbackup (usb4t/backup/nuc)    |       |   then restic instance leg -> S3    |
| 05:00 pull ks4:* -> ks4backup     |       | 05:00 restic: DB dumps + data       |
|   [pending FTTH]                  |       |   trees -> S3 (restic-data)         |
| 05:30 apt upgrade all containers  |       | Sun 14:00 restic maintenance        |
+-----------------------------------+       +-------------------------------------+
   phones/laptops: WG peers 10.8.0.2-3 reach 192.168.1.x through the same endpoint
```

Both tunnels initiate **from** nuc (home NAT, dynamic IP) toward ks4's
fixed endpoint; ks4's incus API is never exposed to the internet.