Resolve OQ-1/2/3, refine OQ-4: single ExpressVPN gateway, single WAN, external media

Operator answers folded into the specs:
- OQ-3 VPN: ExpressVPN, cluster-controlled SINGLE shared in-cluster tunnel
  (OpenVPN UDP / non-TCP), rules enforced outside the service. New ADR-0012
  supersedes ADR-0008 (Gluetun-sidecar default dropped). Central kill-switch.
- OQ-1 WAN/edge: one commercial WAN, no multi-ISP plans; dumb SOHO edge (no
  VLAN/VPN/services). Multi-WAN out of scope; segmentation + VPN in-cluster;
  edge = NAT + manual port-forward. Gateway VIP resolved to Cilium L2
  announcement. T-3.3 marked won't-do.
- OQ-2 storage: bulk media lives outside the cluster (backing TBD, non-blocking)
  via a 'bulk' external-mount indirection; Plex metadata DB stays on Longhorn.
  Split out a separate OQ-BKP for the off-cluster DR backup target (Phase 4).
- OQ-4 refined: wildcard record covers reachability but NOT ACME DNS-01 (needs
  TXT-write access) and does not match *.home.* depth. Still OPEN: Cloudflare
  API token (Option A) vs acme-dns delegation (Option B). T-2.4/T-2.5 blocked.

Updated: docs 00,01,03,04,08,09; ADR-0008/0012 + index; task board.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

agents/task-board.md

@@ -36,29 +36,30 @@ Seeded from [`../roadmap/phases.md`](../roadmap/phases.md) + [`../roadmap/workst
 ## Phase 2 — Platform Core (net/storage/TLS/DNS/ingress)
 | ID | Task | WS | Serves | Blocked-by | Owner | Status |
 |---|---|---|---|---|---|---|
-| T-2.1 | Longhorn (3-replica StorageClass) + bulk-tier plan (OQ-2) | WS-STORAGE | R-STATE-02/04 | T-1.4 | — | todo |
+| T-2.1 | Longhorn (3-replica StorageClass) + `bulk` external-mount indirection (media lives off-cluster, backing TBD — OQ-2 resolved) | WS-STORAGE | R-STATE-02/04 | T-1.4 | — | todo |
 | T-2.2 | Default-deny network baseline (per-namespace) + Hubble | WS-NET | R-NET-01/03 | T-1.3 | — | todo |
 | T-2.3 | Render `dependencies` → CiliumNetworkPolicy from ServiceDefinition | WS-NET/WS-GITOPS | R-NET-02 | T-0.3, T-2.2 | — | todo |
-| T-2.4 | cert-manager + Let's Encrypt DNS-01 wildcard `*.home.keithjackson.dev` | WS-SEC | R-TLS-01/02/03 | T-1.4 | — | todo |
-| T-2.5 | ExternalDNS + Gateway API listeners + split-horizon (PiHole) foundation | WS-NET | R-DNS-01/02/03 | T-2.4 | — | todo |
+| T-2.4 | cert-manager + Let's Encrypt DNS-01 wildcard `*.home.keithjackson.dev` (**blocked on OQ-4**: Cloudflare token vs acme-dns) | WS-SEC | R-TLS-01/02/03 | T-1.4, OQ-4 | — | blocked |
+| T-2.5 | ExternalDNS + Gateway API listeners (VIP via **Cilium L2 announcement**) + split-horizon (PiHole) foundation | WS-NET | R-DNS-01/02/03 | T-2.4 | — | todo |
 | T-2.6 | Prove: default-deny (DNS-only probe), PVC survives rebuild, trusted cert, auto-DNS | WS-NET/STORAGE/SEC | R-NET/STATE/TLS/DNS | T-2.1..2.5 | — | todo |
 | T-2.7 | Deploy **Kyverno in-cluster as admission enforcer** (same policies as the CI L0 gate) | WS-TEST/WS-SEC | R-SEC-02, R-NET-01, R-SEC-01 | T-1.4, T-0.5 | — | todo |
 
-## Phase 3 — Egress, VPN & Multi-WAN
+## Phase 3 — Egress & VPN (single WAN; no multi-WAN — OQ-1)
 | ID | Task | WS | Serves | Blocked-by | Owner | Status |
 |---|---|---|---|---|---|---|
-| T-3.1 | Egress classes; Cilium Egress Gateway wiring | WS-NET | R-NET-04/05 | T-2.2 | — | todo |
-| T-3.2 | VPN egress (Gluetun sidecar) + kill-switch (ADR-0008) | WS-NET | R-NET-05/06 | T-3.1, OQ-3 | — | todo |
-| T-3.3 | Edge-router multi-WAN split for `internet` class (OQ-1) | WS-NET | R-NET-04 | OQ-1 | — | todo |
 | T-3.0 | L3 fault-injection harness — **in-cluster Chainsaw Job** (CI-triggered, scoped test SA) using `script`/`try`/`finally` (force tunnel down, kill node, inject bad image, trigger restore) | WS-TEST | R-TEST-05, R-SEC-02 | T-0.4 | — | todo |
-| T-3.4 | Prove: VPN IP egress, kill-switch fail-closed, egress-class flip via git | WS-NET | R-NET-05/06/07 | T-3.0, T-3.2 | — | todo |
+| T-3.1 | Egress classes; Cilium Egress Gateway wiring (steer `vpn` pods → gateway) | WS-NET | R-NET-04/05 | T-2.2 | — | todo |
+| T-3.2p | **Prereq:** obtain ExpressVPN manual OpenVPN-UDP config + manual creds; store SOPS-encrypted | WS-SEC | R-NET-05 | — | — | todo |
+| T-3.2 | **Single shared in-cluster ExpressVPN gateway** (OpenVPN UDP, active/standby) + centrally-enforced kill-switch (ADR-0012) | WS-NET | R-NET-05/06 | T-3.1, T-3.2p | — | todo |
+| ~~T-3.3~~ | ~~Edge-router multi-WAN split~~ — **out of scope** (single WAN, dumb SOHO edge; OQ-1) | WS-NET | R-NET-04 | — | — | won't-do |
+| T-3.4 | Prove: VPN IP egress, **kill-switch fail-closed (central)**, egress-class flip via git | WS-NET | R-NET-05/06/07 | T-3.0, T-3.2 | — | todo |
 
 ## Phase 4 — Observability, Backup/DR & Updates
 | ID | Task | WS | Serves | Blocked-by | Owner | Status |
 |---|---|---|---|---|---|---|
 | T-4.1 | kube-prometheus-stack + Loki + Alloy + Alertmanager(email) | WS-OBS | R-OBS-01/02/03 | T-2.1 | — | todo |
 | T-4.2 | Platform-health alerts (node/Longhorn/Flux/cert/VPN/backup) | WS-OBS | R-OBS-04 | T-4.1 | — | todo |
-| T-4.3 | Velero + Longhorn off-cluster backup schedule | WS-STORAGE | R-STATE-03 | T-2.1, OQ-2 | — | todo |
+| T-4.3 | Velero + Longhorn off-cluster backup schedule (**needs backup-target choice** — S3/NFS endpoint) | WS-STORAGE | R-STATE-03 | T-2.1, OQ-BKP | — | todo |
 | T-4.4 | DR drill: restore namespace + volumes from off-cluster backup | WS-STORAGE | R-STATE-03 | T-4.3 | — | todo |
 | T-4.5 | Flux image-automation + Renovate + per-service update policy | WS-UPDATE | R-UPD-01/02/03 | T-0.3, T-4.1 | — | todo |
 | T-4.6 | Prove: auto stable update on schedule, bad-update auto-rollback+alert, pin holds | WS-UPDATE | R-UPD-* | T-4.5 | — | todo |
@@ -93,10 +94,11 @@ Seeded from [`../roadmap/phases.md`](../roadmap/phases.md) + [`../roadmap/workst
 
 ---
 
-## Open questions (resolve to unblock)
-| OQ | Question | Blocks | Owner |
+## Open questions
+| OQ | Question | Blocks | Status |
 |---|---|---|---|
-| OQ-1 | WAN uplink count + edge-router product | T-3.3 | — |
-| OQ-2 | Bulk-media home + backup posture | T-2.1, T-4.3 | — |
-| OQ-3 | VPN provider/protocol + concurrent-tunnel limits | T-3.2 | — |
-| OQ-4 | DNS provider API (Cloudflare) token for DNS-01 + ExternalDNS | T-2.4, T-2.5 | — |
+| OQ-1 | WAN count + edge router | — | ✅ resolved: 1 WAN, dumb SOHO edge; multi-WAN out of scope; VPN + segmentation in-cluster |
+| OQ-2 | Bulk-media home | — | ✅ resolved: media outside cluster, backing TBD later (not blocking) |
+| OQ-3 | VPN provider/protocol | — | ✅ resolved: ExpressVPN, single shared in-cluster tunnel, OpenVPN UDP (ADR-0012) |
+| **OQ-4** | **DNS-01 challenge access** | **T-2.4, T-2.5** | ⛔ **OPEN** — Cloudflare API token (Option A, recommended) vs acme-dns delegation (Option B) |
+| **OQ-BKP** | **Off-cluster DR backup target** (S3/NFS endpoint) | T-4.3 | ⛔ **OPEN** — needed by Phase 4, not Phase 2 |