Field report: even with CAP_SYS_ADMIN and full --privileged, NFS mounts
inside the OpenPXE container fail on Unraid with the same
"failed to apply fstab options" error v0.4.64 added diagnostics for.
The root cause is the host kernel: Unraid's base kernel ships without
the nfs/nfsv4 client modules loaded. Capabilities are necessary but
not sufficient; the modules have to be present on the host kernel for
in-container mount(2) to do anything. No container-side change can
fix that.
This is exactly the case every other PXE/imaging tool sidesteps
(Bootimus uses SMB; iVentoy, FOG, MAAS, Cobbler all rely on the host
to mount network storage and bind-mount the path into the imaging
service). v0.4.65 brings OpenPXE in line with that pattern.
What's new:
* `IsoSource::LocalDir { dir_id, relative_path }` — third source kind
alongside `Local` (uploaded) and `Nfs` (in-container mount).
* `LocalDirManager` (crates/iso-store/src/local_dir.rs) — registers
bind-mounted directories, validates them (absolute path, exists, is
a directory, readable), scans for *.iso files, registers them with
IsoStore. Persisted to <work_dir>/local_dirs.json so the relationship
survives restarts.
* `NfsHostCaps::detect()` — pure read of /proc/filesystems on startup.
Surfaced via GET /api/nfs/capabilities and used by the Storage tab to
show a prominent red banner above the NFS form when in-container
mounts cannot possibly work, pointing the operator at the Local
Directories card as the recommended path.
* Four new API routes:
GET /api/nfs/capabilities
GET /api/local-dirs
POST /api/local-dirs { path, label? }
DELETE /api/local-dirs/:id
POST /api/local-dirs/:id/scan
UI changes (crates/webui/src/app.js):
* Storage tab: new "Local directories" card under the NFS card with
the bind-mount form, an explainer paragraph (with the Docker
`-v /mnt/user/isos:/mnt/external-isos` command), and the list of
registered directories with rescan + remove actions.
* When NFS host caps are unavailable, the NFS card sprouts a red
banner explaining what's wrong and pointing at the local-dir
workaround. The card sub-header also flips to "N registered ·
recommended on this host".
* ISO table: new "dir:<id>" source badge; on-disk ISOs show "on disk"
in the actions column instead of a delete button (same pattern as
NFS — OpenPXE doesn't own those bytes).
* API reference table picks up the four new endpoints + a hint about
the new `port` field on NFS add.
Tests (+12, total 162):
* iso-store: 7 local_dir unit tests covering relative-path rejection,
missing path, non-directory file, empty-directory success, default
label, idempotent re-add, remove + iso-path-resolution clear.
* iso-store: 1 nfs unit test confirming NfsHostCaps::detect() never
panics and the boolean accessors are consistent.
* http-api: 4 integration tests covering /api/nfs/capabilities,
/api/local-dirs list/add/remove + relative-path 400.
`cargo clippy --workspace --all-targets -- -D warnings` clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
