# frost

[FROST-Server](https://github.com/FraunhoferIOSB/FROST-Server) — an OGC SensorThings API server. Stores sensors, observations, datastreams in postgis; exposes REST + MQTT.

- **Public hostname**: `sta.wbd-rd.nl`
  - `/FROST-Server` → REST + admin UI (frost-http:8080)
  - `/mqtt`         → WebSocket MQTT for SensorThings clients (frost-mqtt:9876)
- **Networks**: `frost-internal` (private bus) + `app` (nginx ingress)
- **Backend**: dedicated `postgis/postgis:16-3.4-alpine` container — segregated from the shared `sql` stack
- **Internal bus**: dedicated `eclipse-mosquitto` for frost-http ↔ frost-mqtt sync (not reachable from outside the stack)
- **Public MQTT broker for SCADA/IoT clients**: that's `rabbitmq` (port 8883 TLS via nginx stream), NOT this stack

## Volumes (persistent)

- `frost-db-data` — postgis data dir
- `frost-mosquitto-data`, `frost-mosquitto-log` — internal bus state

Container can be recreated freely; no data loss as long as volumes are kept.

## First-run

1. `docker compose up -d frost-db frost-mosquitto` (or just `up -d` for the full stack — frost-http waits on the db healthcheck)
2. `frost-http` will auto-create the schema (`persistence_autoUpdateDatabase=true`) on first start
3. Create the admin user (one-time, post-deploy — the USERS table is created by FROST itself):

   ```bash
   docker compose exec frost-db psql -U sensorthings -d sensorthings -c \
     "INSERT INTO \"USERS\" (\"USER_NAME\", \"USER_PASS\") VALUES ('admin', crypt('CHANGE_ME', gen_salt('bf', 12)));"
   ```

   Subsequent password rotations:
   ```bash
   docker compose exec frost-db psql -U sensorthings -d sensorthings -c \
     "UPDATE \"USERS\" SET \"USER_PASS\"=crypt('NEW_PW', gen_salt('bf', 12)) WHERE \"USER_NAME\"='admin';"
   ```

## TODO

- Switch from `BasicAuthProvider` to Keycloak OIDC (FROST has a plugin)
- Bootstrap admin user automatically (post-init container that waits for FROST schema, then runs the SQL above with `${FROST_ADMIN_PASSWORD}`)
- Document the SensorThings client examples (Things, Datastreams, Observations)
- pgadmin / db inspection: use shared portainer or a one-off `psql` exec