admin
0afadbdeff
Three headline answers.
1. The ceiling is REAL and on mp1 (/mnt/sys_drive), but its shape is a MISMATCH
rather than a single number. A1: docker's data-root is a SEPARATE 50G volume
(mp0) and every app volume resolves there, so app DBs are NOT on sys_drive -
build-golden.sh:68's "like the Docker-data" reading is correct. A2: the
recovery units ARE on sys_drive, which the golden ships at 20G. So a box
permits 50 GB of live app data while capping local backup at 20 GB, and
crossing that line is invisible until a backup fails.
A3 rules out the lab-default explanation: --sysdata-grow defaults to 0
(main.go:178) and is not computed from the drive. demo-hp's REAL guest 9201
runs a bare --config ExecStart and shows mp0 50G / mp1 20G; agent.json has no
sizing keys at all. A4, measured not read: restore extracts IN PLACE on the
docker volume - sys_drive avail was 799.2M before and after a restore run under
constraint - so the constrained mount is written only during backup.
2. Overflow behaves WELL. With sys_drive ballasted to 799 MB, backup refused
per-app ("No space left on device"), other apps continued, status reported
success=false, and the "last good dump preserved" claim VERIFIED byte-for-byte:
size and md5 unchanged, tar valid end-to-end, no .tmp residue. Restoring that
preserved unit under the same constraint returned correct data and claimed
success honestly. Explicitly NOT the R-156 family.
3. But it is SILENT - R-158, filed. Zero events reached the hub.
NotifyBackupFailed exists and the hub allowlists backup_failed, but the only
production caller is the off-box/NAS leg (main.go:659); the backup manager has
tier2/offbox/offbox-enlarge notify seams and none for the local recovery-unit
capture. This is R-97's shipped defect exactly one tier over, and the fifth
instance of "seam built but never wired" - a pattern the codebase names in its
own R-97 wiring test.
Sizing rule corrected: unit ~= volume-tar bytes + logical dump bytes, not a
constant 1.90x. Measured C1: file-only apps are 1.00x (homebox 2305->2305 MB, no
db-dumps dir at all), and the SAME DB app with an empty DB is also 1.00x. So a 20G
sys_drive holds ~19 GB file-only or ~10 GB DB-backed. That is the bound on D5's
Lane-1 independence.
C2: both representations are used for a reason stated in code (F17 - the dump is
authoritative and WINS over the tar; R-47 - replayed with only the DB service up).
The dump is single-database pg_dump --no-owner, so a fresh initdb plus the dump is
logically sufficient and the tar is a PHYSICAL FALLBACK. Dropping it would halve
DB-app units and also close the D5/R-127(b) password trap (restored PGDATA makes
postgres skip initdb and ignore POSTGRES_PASSWORD) - but only after ValidateDump
is promoted from a warning to a gate, since it currently WARNS on a dump whose
accounts table has no rows. In its present form the tar is load-bearing.
No production code, no template change. Teardown still owed and itemised.
Felhom — Documentation
Felhom is a managed home-server service for Hungarian households, built on a three-component model over Proxmox:
- Hub — operator backend on k3s (
hub.felhom.eu). Repo:felhom.eu/hub/. - Host agent — one per Proxmox host; operator-tier; owns all Proxmox interaction. Repo:
felhom-agent/. - In-guest controller — one per customer LXC; Docker-only; manages the customer's apps. Repo:
felhom-controller/.
This directory is the central, code-verified documentation home for all three components plus the platform and the security-audit record.
Sections
Controller (in-guest) — controller/
The Docker-only app-domain controller. Full per-area docs grounded in current source (v0.59.0).
→ controller/README.md: module map, deploy & stack lifecycle, backup
architecture, storage/monitoring/metrics, auth/hub/sync/integrations.
Host agent & platform — architecture/, proxmox-platform.md
The operator-tier agent and the Proxmox platform.
architecture/01-topology-and-trust.md— topology & trust modelarchitecture/03-host-agent.md— the host agent (Go; v0.29.1)architecture/04-control-plane-authorization.md— signing, escrow, authzarchitecture/02-controller-module-map.md— historical v0.33 planning map; the live map iscontroller/module-map.mdproxmox-platform.md— Proxmox platform reference
Hub (operator backend) — architecture/05
architecture/05-hub-architecture.md— hub architecture (v0.11.0)
Security audits & remediation — audits/
audits/deep-sweep-2026-06-13.md— cross-repo deep audit (controller + agent) with remediation statusaudits/bughunt-reconcile-2026-06-13.md— reconciliation of the v0.30.3 BUGHUNT against current code + merged fix list
Spike & test findings — tests/
Per-slice spike/validation findings (phases 0–5, slices 7–10). See tests/.
Conventions
- Code-verified, not memory-derived. Architectural claims here are checked against the actual current source; if a claim can't be verified it is omitted and flagged, not guessed.
- Per-repo operational working files (
CLAUDE.md,CONTEXT.md,CHANGELOG.md,BUGHUNT.md,REPORT.md,TASK.md) live in their own repos — they are operational, not published docs. - Authoritative versions at last refresh: controller v0.59.0, agent v0.29.1, hub v0.11.0.