Commit Graph
2 Commits
Author SHA1 Message Date
Logan CusanoandClaude Opus 5 ee633cbe46 Secure the broker for public exposure: TLS and per-node credentials
Build & Deploy / Build & push images (push) Failing after 42s
Build & Deploy / Deploy to VM (push) Has been skipped
Edge nodes are deployed to arbitrary locations by arbitrary people, so the
broker has to be reachable from the internet and secured on its own merits
rather than by a VPN.

Three defects made that impossible. The broker only had a plaintext 1883
listener; every node shared one drb-node password; and the ACL pattern used
%c, the client-supplied client id, so any holder of that shared password
could set client_id to another node and take over its namespace. The comment
claiming this cryptographically prevented cross-node access was wrong and is
gone.

Authentication now uses mosquitto 2.x's built-in dynamic-security plugin on
the stock eclipse-mosquitto image. c2-core administers it over the control
topic, creating each node's client on approval with username=<node_id> and
password=<its node_keys api_key>, attached to a role whose ACL is nodes/%u/#
against the authenticated username. One credential, one revocation point.
An HTTP-callback plugin was implemented first and rejected: that project is
archived upstream, which is not an acceptable dependency on an
internet-facing broker.

Because dynsec state is a second source of truth alongside Firestore,
approve/reissue/delete now write to the broker first and surface a 502
rather than drifting, and c2-core reconciles every approved node into dynsec
on startup.

Adds node self-enrollment (POST /nodes/enroll, GET /nodes/{id}/credentials)
so a new node can obtain its key over HTTPS without an operator handling
secrets by hand. Enrolling an already-approved node_id is refused on the
fleet token alone — otherwise a leaked token plus a guessable id would let
an attacker steal a live node's key before the real node asked for it.
Pickup secrets are stored hashed and returned once, and the endpoint is rate
limited per source IP.

Infrastructure: an 8883 TLS listener fed by Caddy's certificate via a
systemd path unit, a firewall rule for it, and Caddy now 404s /internal/*
so the api vhost cannot proxy internal routes.

Also fixes CORS, which allowed https://app.<domain> while the frontend is
served on the bare domain — every call from the portal would have failed —
and widens the vault gitignore to a glob, since ansible-vault leaves
backup siblings that the exact-name rule left committable.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-16 09:34:44 -04:00
Logan CusanoandClaude Opus 5 6140dd7b9c Fix prod compose port collision and make ansible deploy re-runnable
Build & Deploy / Build & push images (push) Successful in 4m24s
Build & Deploy / Deploy to VM (push) Failing after 2m11s
docker-compose.prod.yml: compose merges `ports` by appending, so the prod
override left the base file's 8888:8000 and 3000:3000 in place next to the
127.0.0.1-scoped ones. Each container tried to bind its port twice and the
second bind failed with "address already in use", so c2-core and frontend
could never start. It also meant the localhost-only binding never applied —
both ports were published on every interface. Marked both `!override`, the
same way mosquitto already used `!reset`.

infra/ansible:
- add the missing "Reload Caddy" handler; the Deploy Caddyfile task notified
  a handler that did not exist, which aborts the play
- guard mkswap/swapon on whether /swapfile is already active, so a second run
  does not fail on "mounted" / "Device or resource busy"
- git task now updates instead of clone-once, otherwise a re-run redeploys
  whatever code was on the VM at first clone
- vault.yml.example: correct the registry token comment to read-only scope

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-09 21:19:03 -04:00