Discovered during Phase 1.3 (mount NAS datastore). The Debian NAS's
/mnt/backup is on ZFS with casesensitivity=insensitive; NFSv4 writes
fail with EACCES even for root with no_root_squash. Known-bad
combination at the ZFS-on-Linux + NFSv4 layer.
Workaround: mount the NFS share with vers=3. PBS's chunk-based
access pattern works fine over NFSv3.
Added a section 0.5 to Phase 0 documenting the issue + both fixes
(quick: use NFSv3; cleaner: create case-sensitive child dataset).
Future deployments against this NAS won't rediscover the same wall.
Current NFS exports on the Debian NAS (10.250.50.50) use root_squash,
which blocks PBS from writing its datastore metadata (chunks, locks,
GC state — all root-owned operations). Rest-server-ana worked around
this by running its container as UID 1000, but PBS's service model
doesn't accommodate that pattern cleanly.
Solution baked into Phase 0: create a dedicated NFS export for the
PBS-ANA datastore subtree, scoped to only the PBS-ANA VM's IP, with
no_root_squash. Bounded exposure (single client), kept in a separate
.exports file so Cockpit's File Sharing module doesn't clobber it.
Flag world-scoped export on /mnt/pve-VMStorage as a non-blocking
hygiene item for a later Cockpit pass.
End-to-end runbook for standing up Proxmox Backup Server across the
fleet. Path A architecture: single primary at ANA, one-way sync to NH3
for disaster recovery. All 5 hypervisors (pfi-pve, nh3-pve, esh-pve,
esh-pve-nas, sfsrv-ana) migrate from local-dump vzdump to PBS-ANA.
Key decisions captured in the runbook:
- PBS in a Debian VM (not LXC) for clean capability model.
- PBS-ANA on pfi-pve, datastore via NFS from 10.250.50.50 —
separates backup data from hypervisor boot disk.
- PBS-NH3 on nh3-pve with local storage (independent failure
domain from ANA).
- Dedicated fleet-vzdump API token; read-only sync token for
PBS-NH3's pull job.
- sfsrv-ana specifically goes from zero backup coverage to full
vzdump coverage in Phase 3.
9 phases, each self-contained with a done-state and rollback
posture. User can stop between phases without leaving the fleet in a
bad state.
STATUS.md: added item 6b tracking this deployment. Original item 6
(cross-site rsync) now scoped to restic-only since PBS handles the
VM-image cross-site redundancy directly.
vh