Frank
da68b5ce1a
basicauth (2026-08-22 incident): - the Caddyfile template carried its own $2a$14$ prefix and deploy.sh substituted the full hash (prefix included), rendering an invalid double-prefixed hash. Every basicauth vhost rejected every password with 401 and Caddy logged nothing. - template is now a bare REPLACE_WITH_HASH token; tests pin the render contract (no prefix in template; rendered line is exactly 'dank <hash>'). open-webui (2026-08-22 incident): - its slirp4netns helper process died, leaving the container running with only 'lo' in its netns: port 3005 accepted TCP and reset every request, so chat served empty responses for ~2 days, unlogged. - move to a pinned bridge network (systemd-open-webui, 10.89.3.0/24, gw 10.89.3.1) — no per-container helper to die. - LLM endpoint reached via the gateway (host.containers.internal is slirp-only): OPENAI_API_BASE_URL=http://10.89.3.1:52625. - add a quadlet healthcheck: /health (app) + non-loopback interface (network liveness; the dead-tap state leaves only 'lo'). - deploy script now copies the .network file too. - docs updated (OpenWebUI History section, Caddy basic-auth contract).
90 lines
4.2 KiB
Markdown
90 lines
4.2 KiB
Markdown
# Caddy
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Caddy is the single reverse proxy for both hosts. It runs as a container on Dankclaw (192.168.0.143), terminates TLS with real Let's Encrypt certificates, routes hostnames to containers on both hosts, and protects the homepage and sensitive services with HTTP basic auth.
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**Docs:** https://caddyserver.com/docs
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## Facts (live inventory)
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| Item | Value |
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|------|-------|
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| Image | `franksdank/caddy-porkbun:latest` (local build, `dankclaw/caddy/Containerfile`) |
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| Config | `/home/dank/Containers/caddy/Caddyfile` (bind mount, rendered by deploy) |
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| Data | `/home/dank/Containers/caddy/data` (certs) and `.../config` (ACME state) |
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| Ports | 80, 443 on 192.168.0.143 |
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| TLS | Let's Encrypt, DNS-01 via the Porkbun module (one cert per vhost) |
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| Runs on | Dankclaw only — Dankserver has no Caddy |
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The Caddyfile in git (`dankclaw/Caddyfile`) carries a `REPLACE_WITH_HASH` placeholder. `scripts/deploy.sh` renders the real basicauth hash from the host `.env` (`CADDY_BASICAUTH_HASH`) into the mounted path before `up`. See [[Deployment Flow]].
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## The porkbun image
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Stock Caddy cannot solve the ACME challenge because the router exposes no inbound port 80/443. The local image adds the `github.com/caddy-dns/porkbun` module, which answers the DNS-01 challenge by creating and deleting a `_acme-challenge` TXT record through the Porkbun API. No inbound port is needed. Rebuild only when Caddy or the module needs an update:
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```
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podman build -t franksdank/caddy-porkbun:latest -f dankclaw/caddy/Containerfile .
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```
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The Caddyfile references the credentials through the environment:
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```
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acme_dns porkbun {
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api_key {env.PORKBUN_API_KEY}
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api_secret_key {env.PORKBUN_API_SECRET_KEY}
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}
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```
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compose passes both variables from the host `.env`. Keep the real keys in `.env` only; `.env.example` holds placeholders. The Porkbun account holds only `franksdank.cloud`.
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## Vhost map
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Every vhost uses the flat `franksdank.cloud` convention. The full list lives in `dankclaw/Caddyfile`. Routing by host:
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| Upstream | Reach |
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|----------|-------|
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| Dankclaw services (compose network) | by container name, e.g. `comfyui:8188` |
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| Dankclaw quadlet services | by published LAN port, e.g. `192.168.0.143:3000` (Gitea) |
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| Dankserver services | by published LAN port, e.g. `192.168.0.235:8085` (RomM) |
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The bare-IP catch-all `:80` 302-redirects to `https://dankclaw.franksdank.cloud/`. The legacy name `dankserver.franksdank.cloud` 302-redirects there too. `plex.franksdank.casa` is the only plain-HTTP vhost; it cannot get a DNS-01 cert because `franksdank.casa` is not in the Porkbun account. The canonical Plex name is `plex.franksdank.cloud`.
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## Basic auth
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The Caddyfile in git carries a **bare** placeholder; deploy.sh substitutes the **full** hash from the host `.env` (`CADDY_BASICAUTH_HASH`):
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```
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chat.franksdank.cloud {
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basicauth {
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dank REPLACE_WITH_HASH
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}
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reverse_proxy 192.168.0.143:3005
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}
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```
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After rendering, the line reads `dank $2a$14$xxxx…` (one complete hash). Do not put a `$2a$14$` prefix in the template: it would render a double-prefixed, invalid hash (2026-08-22 incident — every basicauth vhost returned 401 for every password). `tests/deployment_flow.bats` pins the render contract.
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The homepage also uses basic auth; see [[Homepage]].
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## Operations
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Validate before a reload:
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```
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caddy validate --config /etc/caddy/Caddyfile --adapter caddyfile
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```
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Certificates and ACME state live in the caddy data volume. Back it up with the stack. Each vhost owns one certificate; renewals are automatic and also use DNS-01.
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## Gotchas
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- The basicauth template must stay a bare `REPLACE_WITH_HASH` token (no `$2a$14$` prefix) — the rendered value is the complete hash. A double prefix silently rejects every password with 401; no Caddy error is logged.
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- A new vhost needs three things: a dnsmasq `addn-hosts` line, a Porkbun A record, and the Caddyfile block. See [[LAN-DNS]].
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- The G36 has no NAT loopback, so LAN clients must resolve the name to the LAN IP. That is the dnsmasq role in [[LAN-DNS]].
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- Caddy serves HTTPS on 443 and HTTP on 80 (redirects). The router needs no 80/443 port forward for LAN use.
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## See Also
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- [[LAN-DNS]] — how names resolve on the LAN and WAN
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- [[Network Architecture]] — topology, access policy
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- [[Homepage]]
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- [[Dankclaw Stack]] |