---
title: central — Data-Hub Spine
type: reference
tags: [recon]
related: ["[[navi]]", "[[services]]", "[[environment]]"]
updated: 2026-06-18
---
# central — Data-Hub Spine

## Overview

central is a multi-domain real-time data-hub spine. Adapters normalize upstream sources, publish CloudEvents to **NATS/JetStream**, and archive to **TimescaleDB/PostGIS** for historical and geospatial query. It is the live data backbone for navi traffic tiles and related situational-awareness feeds.

- **URL (internal):** http://central.echo6.mesh:8000 (mesh-only, no public exposure)
- **Host:** utility CT 104 (unprivileged Ubuntu LXC)
- **Repo:** github.com/zvx-echo6/central (public, Python, branch )
- **Deploy path:**  (Python venv,  system user)

## Host

| Attribute | Value |
|-----------|-------|
| Container | utility CT 104 |
| Local IP | 192.168.1.104 |
| Tailscale / mesh | 100.64.0.12 →  |
| Resources | 4 cores / 12 GB RAM / 100 GB disk |
| OS | Ubuntu LXC (unprivileged) |

## Architecture

The data flow is: upstream APIs → adapters (central-supervisor) → NATS/JetStream :4222 → central-archive (TimescaleDB/PostGIS :5432). The central-gui (FastAPI + HTMX, :8000) exposes the API consumed by navi via .

## Systemd Services

All three units are **enabled and active**; deployment survives reboot.

| Unit | Role |
|------|------|
|  | Adapter scheduler + CloudEvents publisher |
|  | JetStream → TimescaleDB consumer |
|  | FastAPI + HTMX web app + API (the :8000 listener) |

## Ports

| Port | Protocol | Purpose |
|------|----------|---------|
| :8000 | HTTP | GUI / API (bound 0.0.0.0) |
| :4222 | TCP | NATS client connections |
| :8222 | HTTP | NATS monitoring |
| :5432 | TCP | PostgreSQL 16 + TimescaleDB/PostGIS |

## Adapters (~25 active)

| Domain | Sources |
|--------|---------|
| Traffic | ITD 511, WZDX, TomTom flow/incidents, 511 cameras |
| Wildfire | WFIGS incidents/perimeters, InciWeb, FIRMS |
| Weather / Space-weather | NWS, SWPC k-index/protons/alerts |
| Hydro | NWIS |
| Earthquakes | USGS |
| Avalanche | avalanche.org |
| Disasters | GDACS, EONET |
| Satellite | CelesTrak TLE, sat positions/orbits, N2YO passes, satpass predict |

## GUI / API Surface

Authenticated app with login/sessions/CSRF, first-run setup wizard, operator management, adapter configuration, stream viewer, enrichment pipeline, monitoring-area management, API key management, audit log, and manual resend.

**Auth-exempt tile endpoints** (used by navi, verified HTTP 200):

| Endpoint | Format |
|----------|--------|
|  | PNG tile (raster) |
|  | PBF tile (vector) |

All other  endpoints are auth-gated.

## Consumer — navi Integration

navi-traffic (navi's in-VM :8421 extraction service) was **retired on 2026-05-26** and cut over to central. recon-vm's nginx () now proxies  → . Tile endpoints verified returning HTTP 200.

## Dependencies

| Component | Location |
|-----------|----------|
| NATS / JetStream | Local (central CT 104) |
| PostgreSQL 16 + TimescaleDB + PostGIS | Local (central CT 104) |
| Upstream APIs | ~20 external sources (see Adapters table) |

## Deploy / Drift Notes (as of 2026-06-18 audit)

- **Deployed HEAD:** v0.14.4
- **Repo :** v0.14.5 — deployment is **1 release behind**
- **Uncommitted local migration:**  exists on disk in the deployment but was **never committed to the repo**
- **Stale README:** repo README still reads *"Phase 0 — scaffold, not yet operational"* — central is fully operational
- **Stale :** version field shows 0.3.0; real version is the git tag (v0.14.x)

---

*Last updated: 2026-06-18 — Initial documentation; central was previously undocumented. Deployment confirmed live, all three systemd units active.*
