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Frank 90c4ac69a7 Doc audit: fix all broken links + correct stale facts across the KB

Fanned out 5 read-only doc-auditor subagents (one per service group) that
fact-checked the knowledge base against the live system + repo config,
researched official setup docs online, and verified progress. Applied:
- All 34 broken links fixed (real pages / external URLs / correct relative
  paths); 0 broken links remain. No .AGENTTRASH links (the 4 mentions are
  accurate descriptive text, not links).
- Fact-check fixes: Readarr retired (May 2026), Radarr v4->v6, Calibre
  9.2.1 live, Calibre-Web 0.6.25 live, Copyparty v1.20.21, LLM index
  ncmoe 38 + 786432 ctx, frank-default-small active (not frank-pp-worker),
  Hermes/SearXNG/Grafana hostnames, Loki/Alloy local images, Observability
  diagram (Promtail->Alloy), VLLM retired note, DFlash status, benchmark
  live-drift notes, Homepage test count 116.

2026-08-24 01:10:44 -07:00

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Gluetun

Gluetun is a lightweight VPN client container. It connects to a VPN provider (WireGuard or OpenVPN) and shares that tunnel with other containers that attach to its network namespace.

Host: Dankclaw — Docs: https://github.com/qdm12/gluetun

Facts (from research, primary source)

Item	Value
Image	`qmcgaw/gluetun:latest`
Capabilities	`NET_ADMIN` required
Device	`/dev/net/tun:/dev/net/tun`
Ports published	searxng's 8081 → 8080 lives here
Tunnel check	the `tun0` interface exists (the `:8000` server 404s on all paths)

Required Environment

environment:
  VPN_SERVICE_PROVIDER: "${VPN_SERVICE_PROVIDER}"   # e.g. mullvad, protonvpn
  VPN_TYPE: wireguard
  WIREGUARD_PRIVATE_KEY: "${WIREGUARD_PRIVATE_KEY}" # from .env, never committed

VPN_TYPE default is openvpn; WireGuard preferred when the provider supports it.
Provider-specific variables come from the Gluetun wiki; set them in .env.

Optional DNS (from research)

Variable	Default	Purpose
`DNS_UPSTREAM_RESOLVER_TYPE`	`dot`	DNS over TLS
`DNS_UPSTREAM_RESOLVERS`	`cloudflare`	upstream DoT providers
`DNS_CACHING`	`on`	cache queries
`BLOCK_MALICIOUS`	`on`	block malicious hostnames

Warning from the wiki: do NOT set DNS_UPSTREAM_PLAIN_ADDRESSES to a LAN/bridge address — DNS queries leak out of the tunnel.

Attaching a Container

The searxng unit reuses gluetun's network namespace:

[Container]
ContainerName=searxng
Network=gluetun.container

Network=gluetun.container also adds a systemd dependency on gluetun, so searxng starts after the tunnel.

Boot Persistence

gluetun runs as the gluetun quadlet unit (see SearXNG for the full trio). It sets WantedBy=default.target and user linger is on, so the tunnel starts at boot. The WireGuard credentials live in /opt/searxng/.env (mode 0600). Deploy with scripts/deploy-searxng-quadlet.sh dankclaw.

Verify the Tunnel

podman exec gluetun curl -s ifconfig.me

The returned IP must differ from the host IP.

Gotchas

The container that holds the published port must be the one with the ports mapping (gluetun).
restart: always on gluetun so the tunnel reconnects after VPN drops.
When gluetun restarts, attached containers inherit the new network state; searxng may need a restart to re-resolve DNS.

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