rustdesk-server/README.md

# rustdesk-server

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Self-hosted [RustDesk Server Pro](https://rustdesk.com/docs/en/self-host/) (remote-desktop relay + rendezvous) for Sea Haven Industries, deployed to AWS via CDK.

> Status: **scaffold** — not yet deployed. See [First deploy](#first-deploy).

## Architecture

A single ARM64 EC2 instance runs RustDesk Server Pro (`hbbs` rendezvous/ID + `hbbr` relay) in Docker. Clients connect from anywhere over the public internet to a stable Elastic IP fronted by `rustdesk.seahaven.com`.

```
RustDesk clients (anywhere)
        │  TCP 21114-21119 / UDP 21116
        ▼
   Elastic IP ──► EC2 t4g.small (AL2023 arm64, SSM-managed)
                    │  Docker: hbbs + hbbr (network_mode: host)
                    ├─ /dev/xvda  20 GiB root (OS only, ephemeral)
                    └─ /var/lib/rustdesk ◄── standalone EBS 20 GiB (RETAIN)
                                              key pair + sled DB
   Nightly DLM snapshots (retain 30, tag rustdesk-backup=true)
```

All durable state (the `id_ed25519` server key pair and the sled database) lives on a **standalone, RETAINed** EBS data volume, never an inline block device, so it survives instance replacement and stack deletion. See [RUNBOOK.md](RUNBOOK.md).

## Documentation

The canonical map of Sea Haven's AWS infrastructure lives in Confluence. This project's `rustdesk-server` stack is represented there as a Mermaid subgraph.

- **[AWS Architecture Map](https://seahaven.atlassian.net/wiki/spaces/IT/pages/1540098)** (Confluence, IT space, page 1540098)

## Ports

| Port | Proto | Purpose | Exposure |
|---|---|---|---|
| 21114 | TCP | Pro web console / API | **VPN/VPC only** (10.10.0.0/16, 10.20.0.0/16) |
| 21115 | TCP | hbbs NAT type test | public |
| 21116 | TCP + UDP | hbbs registration / hole punch / heartbeat | public |
| 21117 | TCP | hbbr relay | public |
| 21118 | TCP | hbbs web client (websocket) | public |
| 21119 | TCP | hbbr web client (websocket) | public |

Relay/rendezvous ports are public so clients connect from anywhere. The Pro admin console (21114) is restricted to the office VPN + VPC, so you administer the server and activate the Pro license over VPN. To take the relay VPN-only later, flip the `public` flags in `RUSTDESK_PORTS` in the stack.

## Resources

- **EC2** `rustdesk-server` — AL2023 arm64, `t4g.small`, SSM-managed (no inbound SSH)
- **EBS data volume** `rustdesk-data` — 20 GiB GP3, encrypted, `RemovalPolicy.RETAIN`, attached at `/dev/xvdf`
- **Elastic IP** — stable public address, associated to the instance
- **Security group** `rustdesk-server` — RustDesk ports above
- **IAM role** `rustdesk-server-instance` — `AmazonSSMManagedInstanceCore` + `secretsmanager:GetSecretValue` on `rustdesk/*`
- **DLM** `rustdesk-server-dlm` — nightly instance snapshots, retain 30
- **Route 53** A record `rustdesk.seahaven.com` → EIP

## Configuration

### Secrets (Secrets Manager) — created out of band

| Secret | Contents |
|---|---|
| `rustdesk/server-key-pair` | `id_ed25519` private + `.pub` public key generated by `hbbs` on first boot (mirror up post-deploy so a replacement host keeps the same key) |
| `rustdesk/pro-license` | RustDesk Server Pro license key |

### SSM parameters (non-secret)

| Parameter | Purpose |
|---|---|
| `/rustdesk-server/relay-host` | Public hostname clients use (`rustdesk.seahaven.com`) |

The pinned Docker image tag lives in `lib/rustdesk-server-stack.ts` (`RUSTDESK_IMAGE_TAG`).

## Deployment

CI/CD runs through the reusable org workflows (`ci-typescript-cdk.yaml`, `cd-cdk.yaml`). Pushes to `main` deploy automatically.

```bash
npm ci
npx cdk diff
npx cdk deploy
```

## First deploy

1. Confirm a **public** subnet ID in `us-east-1a` and set `PUBLIC_SUBNET_ID` in `lib/rustdesk-server-stack.ts` (replace `subnet-REPLACE_ME`).
2. Verify/pin `RUSTDESK_IMAGE_TAG`.
3. Create the OIDC deploy role `githubdeploy-rustdesk-server` and the repo secret `AWS_DEPLOY_ROLE_ARN`.
4. `cdk deploy` (or push to `main`). The instance boots, pulls the images, and `hbbs` generates the key pair on the empty data volume.
5. SSM in, read `/var/lib/rustdesk/id_ed25519{,.pub}`, store into `rustdesk/server-key-pair`.
6. Over the office VPN, open `http://rustdesk.seahaven.com:21114`, activate the Pro license, create users (the console is not reachable off-VPN).
7. Point a test client at `rustdesk.seahaven.com` + the public key; confirm a session relays.

## Operations

See [RUNBOOK.md](RUNBOOK.md) for key rotation, restore-from-snapshot, and instance replacement.