# Materia Infrastructure

Single-server local-first setup for BeanFlows.coffee on Hetzner NVMe.

## Architecture

```
Hetzner Server (NVMe)
├── /opt/materia/              # Git repo, code, uv environment
├── /data/materia/landing/     # Extracted USDA data (year/month subdirs)
├── /data/materia/lakehouse.duckdb  # SQLMesh output database
└── systemd services:
    ├── materia-supervisor     # Pulls git, runs extract + transform daily
    └── materia-backup.timer   # Syncs landing/ to R2 every 6 hours
```

## Data Flow

1. **Extract**: USDA API → `/data/materia/landing/psd/{year}/{month}/{etag}.csv.gzip`
2. **Transform**: SQLMesh reads landing CSVs → writes to `/data/materia/lakehouse.duckdb`
3. **Backup**: rclone syncs `/data/materia/landing/` → R2 `materia-raw/landing/`
4. **Web**: Reads `lakehouse.duckdb` (read-only)

## Setup

### Prerequisites

- Hetzner server with NVMe storage
- Pulumi ESC configured (`beanflows/prod` environment)
- `GITLAB_READ_TOKEN` and `PULUMI_ACCESS_TOKEN` set

### Bootstrap

```bash
# From local machine or CI:
ssh root@<server_ip> 'bash -s' < infra/bootstrap_supervisor.sh
```

This installs dependencies, clones the repo, creates data directories, and starts the supervisor service.

### R2 Backup

1. Install rclone: `apt install rclone`
2. Copy and configure: `cp infra/backup/rclone.conf.example /root/.config/rclone/rclone.conf`
3. Fill in R2 credentials from Pulumi ESC
4. Install systemd units:

```bash
cp infra/backup/materia-backup.service /etc/systemd/system/
cp infra/backup/materia-backup.timer /etc/systemd/system/
systemctl daemon-reload
systemctl enable --now materia-backup.timer
```

## Pulumi IaC

Still manages Cloudflare R2 buckets and can provision Hetzner instances:

```bash
cd infra
pulumi login
pulumi stack select prod
pulumi up
```

## Monitoring

```bash
# Supervisor status and logs
systemctl status materia-supervisor
journalctl -u materia-supervisor -f

# Backup timer status
systemctl list-timers materia-backup.timer
journalctl -u materia-backup -f
```

## Cost

| Resource | Type | Cost |
|----------|------|------|
| Hetzner Server | CCX22 (4 vCPU, 16GB) | ~€24/mo |
| R2 Storage | Backup (~10 GB) | $0.15/mo |
| R2 Egress | Zero | $0.00 |
| **Total** | | **~€24/mo (~$26)** |
