diskless-workstation/serving/fleet-manager/DEPLOY.md

# fleet-manager — deployment runbook

Bring-up of the fleet-manager (control plane + admin SPA) and its private
InfluxDB on the **management host**. This is a lab/on-prem deployment; adapt the
PKI/ACME steps to your environment. See [`README.md`](README.md) for the design
and [`docs/fleet-management-design.md`](../../docs/fleet-management-design.md) for
the architecture.

> **Where it runs.** The management host — the trusted side, alongside the
> enrol-broker and step-ca (`serving/dot1x-bench/`). **Never on the boot LAN.**
> The admin plane (passkey UI) faces admins; the agent plane (gRPC/mTLS) faces
> enrolled hosts; both are segmented from the boot network.

## Prerequisites

- Docker + compose, and the `step` CLI (smallstep) on the host.
- The **fleet step-ca** already bootstrapped (`serving/dot1x-bench/` —
  `docker compose up -d step-ca && ./step-ca/bootstrap.sh`), so
  `../dot1x-bench/pki/root_ca.crt` and the `enrol` provisioner exist.
- The **enrol-broker** running (`serving/dot1x-bench/` compose) with its admin
  plane on `127.0.0.1:9443`.
- A DNS zone you control for the UI hostname (`bitasylum.org`) and an ACME
  client that can do **DNS-01** (e.g. `lego` or `certbot` + your DNS provider).
- A **YubiKey** (or other WebAuthn authenticator) for the bootstrap admin.

## 1. Configure

```bash
cd serving/fleet-manager
cp .env.example .env
# Edit .env:
#   FLEET_MGR_RP_ID / _ORIGIN   -> your UI hostname (diskless-server.bitasylum.org)
#   FLEET_MGR_INFLUX_TOKEN      -> a long random secret (openssl rand -hex 32)
#   INFLUX_ADMIN_PASSWORD       -> a strong password
```

The Influx token is handed to **both** InfluxDB (its init admin token) and the
manager, so one value wires them with no copy step. `.env` is gitignored.

## 2. PKI

Three certs, three trust roots — do not conflate them (see README "two planes"):

### 2a. Agent-plane server cert (fleet CA)

Enrolled hosts dial the gRPC agent plane and verify the manager against the
**fleet root** they hold, so this cert is issued by the fleet CA:

```bash
# SANs = every name/IP a host might dial the agent plane on.
AGENT_SANS=diskless-server.bitasylum.org,10.0.0.1 \
  ./server-pki.sh
# -> ./pki/agent/{server.crt,server.key,fleet-ca.crt}
```

### 2b. Broker admin-client cert (broker admin CA)

The manager is an mTLS **client** of the enrol-broker's admin plane. Mint its
client cert from the broker's **dedicated admin CA** (NOT the fleet CA — reusing
the fleet CA would let any enrolled host authenticate to the admin plane). Mint
the whole set **once** into the broker's own PKI dir (so the broker gets its
`server.crt`/`server.key` too), then copy the CA + client cert to the manager so
**both sides share one admin CA**.

The broker's PKI dir + its "serve mTLS" switch differ by which stack runs it:

- **Main serving stack** (`serving/docker-compose.yml`) — broker mounts
  `./enrol-pki:/pki`, and the admin plane is **plaintext by default**
  (`ENROL_ADMIN_INSECURE=true` in `serving/.env`). Set it `false`, then:
  ```bash
  cd ..                                     # serving/
  ./enrol-broker/admin-pki.sh ./enrol-pki/broker fleet-manager
  #   -> enrol-pki/broker/{admin-ca.crt, server.crt, server.key, clients/fleet-manager.*}
  docker compose up -d enrol-broker         # restart so it serves mTLS (no cert error in logs)
  mkdir -p fleet-manager/pki/broker
  cp    enrol-pki/broker/admin-ca.crt  fleet-manager/pki/broker/
  cp -r enrol-pki/broker/clients       fleet-manager/pki/broker/
  ```
- **Bench stack** (`serving/dot1x-bench/`) — broker mounts `./pki:/pki` and is
  mTLS-by-default (cert paths hardcoded in that compose):
  ```bash
  ../enrol-broker/admin-pki.sh ../dot1x-bench/pki/broker fleet-manager
  cp -r ../dot1x-bench/pki/broker ./pki/broker
  ```

Either way the manager ends up with `./pki/broker/{admin-ca.crt,
clients/fleet-manager.{crt,key}}`. If you (re)generate a fresh admin CA, **re-copy**
it to the manager — a stale copy won't verify. Verify the mTLS end to end:
```bash
curl -s --cert ./pki/broker/clients/fleet-manager.crt \
        --key  ./pki/broker/clients/fleet-manager.key \
        --cacert ./pki/broker/admin-ca.crt \
        https://127.0.0.1:9443/pending ; echo    # expect [] or null (empty queue)
```

### 2c. Admin UI cert (Let's Encrypt DNS-01)

The UI hostname resolves on the mgmt net and is **not internet-reachable**, so
HTTP-01/TLS-ALPN-01 can't validate. Use **DNS-01**, which proves control of the
zone via a TXT record (and supports wildcards). Example with `lego`:

```bash
# Credentials for your DNS provider are provider-specific (env vars).
lego --dns <provider> --domains diskless-server.bitasylum.org \
     --email you@example.org --accept-tos run
# Point the manager at the issued files (it hot-reloads on renewal):
mkdir -p ./pki/admin
cp .lego/certificates/diskless-server.bitasylum.org.crt  ./pki/admin/fullchain.pem
cp .lego/certificates/diskless-server.bitasylum.org.key  ./pki/admin/privkey.pem
```

Automate renewal (cron/systemd-timer) to rewrite those two files; the manager's
`certReloader` notices the mtime bump and swaps the cert live — no restart. A
publicly-trusted cert also keeps the WebAuthn secure-context clean (no browser
warnings). *Alternative:* front the loopback admin listener with your existing
mgmt reverse proxy and terminate the cert there; then set
`FLEET_MGR_ADMIN_INSECURE=false` still but let the proxy hold the cert.

## 3. Start InfluxDB

```bash
docker compose up -d influxdb
docker compose ps    # wait for healthy
```

First start runs setup with the org/bucket/token/retention from `.env`.

## 4. Bootstrap the first admin (passkey)

Admin auth is closed — there is no password. Mint a **one-time enrolment link**
and register your passkey in the browser:

```bash
docker compose run --rm fleet-manager register-admin "your-name"
# prints: https://diskless-server.bitasylum.org/#/enrol?token=...
```

The `register-admin` subcommand generates the shared enrol-HMAC key on first run
(into the `fleet-data` volume at `/data/enroll.key`) and mints an HMAC-signed,
single-use token (jti ledger prevents replay). Open the link on a machine with
your YubiKey, tap + PIN, and the passkey is registered. Further admins can be
enrolled from the UI once one exists.

## 5. Start the manager

```bash
docker compose up -d fleet-manager
docker compose logs -f fleet-manager
```

Healthy startup logs the four planes: admin HTTPS+passkey, agent gRPC/mTLS,
authorise (broker), and the InfluxDB gateway. Any plane whose config is absent
logs `DISABLED` and the rest still run.

Then browse to `https://diskless-server.bitasylum.org/`, log in with the passkey,
and you should see **Monitor / Authorise / Lifecycle**.

## Smoke test without hardware

To render the SPA against demo data with no passkey/PKI:

```bash
docker compose run --rm -e FLEET_MGR_ADMIN_INSECURE=true -e FLEET_MGR_SEED=true \
  -e FLEET_MGR_ADMIN_ADDR=0.0.0.0:9500 -p 9500:9500 fleet-manager
# http://localhost:9500/  (whoami returns "dev-insecure"; two seeded hosts)
```

`FLEET_MGR_ADMIN_INSECURE=true` is **dev/lab only** — plaintext, no passkey.

## Backups

Back up the `fleet-data` volume (`inventory.json`, `admins.json`, `enroll.key`)
and the `influx-data` volume. Losing `admins.json` locks every admin out — you'd
re-bootstrap with `register-admin`. Losing `enroll.key` invalidates any
outstanding (unused) enrol links.

## Troubleshooting

- **`permission denied` writing the inventory on approve** — the runtime image is
  distroless `nonroot` (uid **65532**), but a named volume is created root-owned,
  so `/data` isn't writable. A rebuilt image pre-creates `/data` owned by nonroot
  (a *fresh* volume inherits it), but an **already-created** volume must be fixed
  once:
  ```bash
  docker volume ls | grep fleet          # find the name, e.g. fleet-manager_fleet-data
  docker run --rm -v <vol>:/data alpine chown -R 65532:65532 /data
  ```
- **`authorise plane not configured (no enrol-broker wired)` in the SPA** — the
  manager has the pillar disabled (`s.broker == nil`). Check
  `docker compose logs fleet-manager | grep -i pillar`: a `DISABLED`/`WARNING`
  line names the missing URL or cert file. After staging the broker PKI, the
  container must be **recreated** (`docker compose up -d --force-recreate
  fleet-manager`) — a plain restart won't re-enable a plane that soft-disabled at
  boot. Also make sure only **one** manager instance is bound to `:9500`
  (`docker ps | grep manager`); a stale parallel instance serves the old state.
- **`TLS connect error: wrong version number` to the broker** — the broker admin
  plane is answering in **plaintext**: it's running with `ENROL_ADMIN_INSECURE=true`
  (the main serving-stack default). Set it `false`, ensure the broker's
  `server.crt`/`server.key`/`admin-ca.crt` exist in its PKI mount, and restart it
  (see step 2b).

## What is NOT yet wired (recorded intent)

Per-host **boot-version assignment** (`desired.target_version`) is stored and
pushed to the agent, but does not yet change what a host boots: that needs
dnsmasq cohort steering + multi-version UKI serving (`docs/TODO.md` #6). Kiosk
URL / reboot / drain **do** reconcile via the agent today. The Lifecycle page
labels the version pin as recorded intent.