Files

dtoro 8a6422bd7d docs: move narrative wiki under knowledge/wiki/ (phase 3)

Problem: node and cross-cutting narratives lived at the repo root
(containers/, vms/, infrastructure/, host .md files), interleaved with the
machine-readable substrate.

Change:
- Move containers/ -> knowledge/wiki/containers/, vms/ -> knowledge/wiki/vms/,
  infrastructure/ -> knowledge/wiki/infrastructure/, hosts/{hubris,strong}.md ->
  knowledge/wiki/hosts/, infrastructure/references/ -> knowledge/sources/references/,
  GLOSSARY.md -> knowledge/GLOSSARY.md.
- Add knowledge/{index.md,log.md,sources/index.md} scaffolding.
- Rewrite all relative links repo-wide via a path-resolving mapper (inbound +
  outbound + between-moved-files), including .hermes/, runbooks, operations,
  investigations, plans, README, AGENTS.
- Repoint inventory.yaml doc_page fields and regenerate hosts/*.yaml (which
  embed doc_page); update oikos/gen-topology.py output path, candidate doc
  paths, and footer links; update code-comment doc paths.

Substrate untouched in place: inventory.yaml, hosts/*.yaml (regenerated,
idempotent), oikos/ code, mcp/, secrets/, bin/.

Verification:
- Logical broken-link set identical to pre-move baseline (net 128 -> 127; the
  topology regen fixed one, introduced none). Remaining are pre-existing refs
  to destroyed/archived nodes, out of scope for this move.
- gen-topology.py --check exit 0 (in sync); cards carry knowledge/wiki/ doc paths.
- build_host_files.py idempotent; all inventory doc_page targets resolve.
- MCP contract verified: get_page/search_docs/get_changelog resolve moved pages.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-06 14:35:23 +02:00

5.6 KiB

Raw Blame History

107 — `dns`

Homelab DNS server (Technitium). Replaces the dnsmasq that lived on 124 — authentik; single-purpose, one job.

At a glance

Hostname: dns
IP: 192.168.8.2 (static — stable, decoupled from any app)
Privilege: privileged (Docker-in-LXC, features: nesting=1)
Resources: 1 core / 1 GiB / 8 GiB rootfs
Created: 2026-06-01, Debian 13. Its own resolver is 1.1.1.1 (no circular dependency on the DNS it serves).

Role

Authoritative split-horizon DNS for hubris.network on the LAN/mesh, plus recursive forwarding (1.1.1.1, 8.8.8.8) for everything else. Technitium runs in Docker (technitium/dns-server:latest, network_mode: host), web console on :5380.

The `hubris.network` zone

Specific A overrides: app names → 192.168.8.175 (Caddy), nfs-export → 192.168.8.200, auth/sso/... as needed.
auth.hubris.network → 82.165.190.79 (VPS Authentik), sso.hubris.network → 192.168.8.175 (LAN forward-auth outpost).
Wildcard *.hubris.network → 82.165.190.79 — mirrors the public IONOS wildcard so undefined names (e.g. netbird) resolve to the VPS, matching public behaviour.
MX / SPF-TXT / CAA replicated from public so an authoritative zone doesn't shadow hubris.network email/cert records.

Config / access

/opt/technitium/docker-compose.yml; admin password in /opt/technitium/admin_password.txt (mode 600 — sops-encrypt in Phase 5).
Console: http://192.168.8.2:5380 (user admin).
API: http://192.168.8.2:5380/api/... (token via /api/user/login). Zone was built via the API.

Who points here

NetBird mesh peers: resolve via the NetBird managed DNS zone, kept in sync from this Technitium (see dns-sync below). The home-lab-dns nameserver group (→ 192.168.8.2) is a thin fallback forwarder.
Homelab DHCP clients: Technitium's own DHCP scope hands out 192.168.8.2 as the DNS server for 192.168.8.x leases (see DHCP section below).
Plain LAN clients (192.168.178.x): Fritz!Box DHCP still hands out Fritz!Box itself (192.168.178.1) as DNS — no split-horizon for non-mesh clients. Changing this requires a secondary DNS fallback, which Fritz!OS 8.x doesn't expose in a single DHCP field.

dns-sync (Technitium = authoring source)

/opt/dns-sync/sync.py (cron */10, logs /var/log/dns-sync.log) reconciles this zone's named A-records → the NetBird managed DNS zone via the NetBird API (/api/dns/zones/{id}/records). Token at /opt/dns-sync/netbird-token (mode 600; source of truth in sops secrets/netbird-pat.yaml). Edit DNS only here; the sync propagates to the mesh. It deletes NetBird records absent from Technitium. Tracked: scripts/dns-sync.py. Why this exists: NetBird won't forward to Technitium for mesh peers (self-IP / nameserver-group quirks), so we sync into the managed zone instead — see dns.md.

DHCP

Technitium also runs a DHCP server for the homelab subnet (enabled 2026-06-02):

Scope: homelab — 192.168.8.241 – 192.168.8.254
Gateway: 192.168.8.1 (Proxmox vmbr0 alias)
DNS: 192.168.8.2 (self)
Lease time: 24 h

Replaces the DHCP that was previously served by the Slate AX router. Static-IP LXCs (.101–.239) are excluded from the pool. Pool narrowed from .100–.240 to .241–.254 on 2026-06-03 to eliminate IP conflict risk.

124 — authentik — retired host of the old dnsmasq
DNS split-horizon
Mesh

Changelog

2026-06-24 — A record `trmnl.hubris.network → 192.168.8.175`

Added for trmnl (128) (LAN path via Caddy (121)); propagated to the NetBird managed zone by dns-sync.

2026-06-06 — dns-sync cron installed (had been missing since deployment)

Although the 2026-06-03 changelog claimed "cron */10", no crontab was actually configured on the LXC. The sync was running only via ad-hoc manual invocations during incident debugging. Fixed by adding /etc/cron.d/dns-sync.

2026-06-03 — DHCP pool narrowed to `.241–.254`

Previous pool .100–.240 overlapped with all static LXCs/VMs (.101–.239). Shrunk via API (/api/dhcp/scopes/set). 11 stale DHCP leases in .101–.110 remain until natural expiry (2026-06-04). See plan.

2026-06-03 — dns-sync added (Technitium → NetBird managed zone)

This Technitium became the single DNS authoring source; /opt/dns-sync/sync.py (cron */10) reconciles named A-records into the NetBird managed zone via the API. Fixed previously-broken mesh names (sso, nfs-export, mcp, secrets) by adding them to the managed zone; reaped obsolete files/photos-new. See dns.md.

2026-06-02 — DHCP server enabled; replaces Slate AX DHCP

Enabled Technitium's built-in DHCP server for 192.168.8.0/24 (scope homelab, range .100–.240, gateway 192.168.8.1, DNS self). Previously the Slate AX sub-router served DHCP for the homelab subnet. With the Slate AX retired and Proxmox now the subnet router, Technitium takes over DHCP. Configured via the Technitium API (/api/dhcp/scopes/set). DHCP LXCs kept their Slate AX leases until expiry, then renewed from Technitium.

2026-06-01 — created; replaced dnsmasq on 124

Stood up Technitium at 192.168.8.2, imported the split-horizon zone (specific A + wildcard + MX/SPF/CAA), made it the primary nameserver in the NetBird home-lab-dns group. Verified all names resolve with dnsmasq/124 stopped; LXC 124 retired.

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107 — dns