# Monitoring overlay for the Pi

These two files are the desired state of `/home/mokhtar/app/monitoring/` on the Pi
after the X1208 exporter is in place. The `.original` siblings are snapshots of
what's there right now (pulled with `ssh rpi cat ...`).

## Diff summary

**`compose.yaml`** — node-exporter service:

- Add volume `/var/lib/node-exporter/textfiles:/textfiles:ro`
- Add command flag `--collector.textfile.directory=/textfiles`

**`prometheus.yaml`** — global block:

- Add `external_labels: { host: rpi }` so metrics are tagged in Grafana Cloud
  (instead of relying on the Docker service name as `instance`).

## Apply

```bash
scp compose.yaml prometheus.yaml rpi:/home/mokhtar/app/monitoring/
ssh rpi 'cd /home/mokhtar/app/monitoring && docker compose up -d'
```

This recreates the node-exporter container (~2s blip) and reloads Prometheus.