# Standby Hostname & OS Renaming

After deploying the standby watchdog script, also rename the standby's OS to match its DNS name.

## On the standby box

```bash
hostnamectl set-hostname app1-bu.itpropartner.com
```

Verify with both `hostname` and `hostname -f`.

## Also rename in the cloud provider API

The cloud provider labels (Hetzner Cloud Console, API `server.name`) and the OS hostname are separate. Update both:

```python
import urllib.request, json
headers = {'Authorization': f'Bearer {token}', 'Content-Type': 'application/json'}
data = json.dumps({"name": "app1-bu.itpropartner.com"})
req = urllib.request.Request(f'https://api.hetzner.cloud/v1/servers/{SERVER_ID}', data=data.encode(), headers=headers, method='PUT')
urllib.request.urlopen(req, timeout=10)
```

## Why this matters

- The DNS A record, the cloud provider name, and the OS hostname should all agree
- Scripts that check `hostname` for routing decisions won't break
- The DR documentation references the DNS name — matching OS hostname reduces confusion during failover