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sops-encrypt TURN password + Authentik client secret; homelab render-vps-configs

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The IONOS netbird VPS held two credentials in plaintext that were the last
holdouts from the homelab's sops+age secrets pattern:
  - /root/turn-pass.txt  (coturn long-term-credential password)
  - PKCEAuthorizationFlow.ProviderConfig.ClientSecret inline in
    /opt/management.json (Authentik OIDC client secret)

This commit moves both into sops-encrypted YAML in the repo and adds a render
command that recreates the VPS config files from templates + decrypted secrets:

* secrets/turn-shared-secret.yaml      — encrypted `password: <coturn pwd>`
* secrets/netbird-authentik-oidc.yaml  — encrypted `client_secret: <...>`
  Both recipients = hubris + apps + republic-laptop (same 3 as hello.yaml).
* vps/turnserver.conf.tmpl + vps/management.json.tmpl — templates with
  {{TURN_PASSWORD}} + {{AUTHENTIK_CLIENT_SECRET}} placeholders.
* bin/homelab new subcommand `render-vps-configs`:
  - Decrypts both secrets locally (works on any recipient).
  - Substitutes placeholders into templates.
  - Diffs against current VPS state via ssh, prompts, applies atomically
    (write `.new` then mv), restarts coturn + netbird-mgmt.
  - --dry-run + -y flags. Hops through hubris when not running on hubris
    itself, since VPS sshd is locked to hubris's pubkey.
* inventory.yaml adds the VPS as `kind: external` (new kind; reserved for
  ssh-managed hosts that aren't homelab clients themselves — no age key,
  no /opt/homelab-context). hosts/netbird-vps.yaml regenerated.
* SHARED_SECRETS list includes both new secrets so re-keys on enrollment
  changes pick them up automatically.

After this lands + the 5-min sync propagates to hubris, run from hubris PVE
shell (or any client; hubris just skips the extra ssh hop):

  homelab render-vps-configs --dry-run    # see plan, no changes
  homelab render-vps-configs -y           # apply + restart services

Once verified working, the plaintext `/root/turn-pass.txt` should be deleted
on the VPS (the rendered /etc/turnserver.conf no longer needs it as a
reference).
This commit is contained in:
authentik Default Admin
2026-05-21 22:21:06 +02:00
parent 21063015c7
commit 8ef17dba3d
9 changed files with 420 additions and 4 deletions
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3
infrastructure/vps-hardening.md
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@@ -9,7 +9,8 @@ IONOS VPS that runs the Netbird control plane and the [public ingress traefik](i
- **Public:** `82.165.190.79` (`ens6`).
- **Public DNS:** IONOS wildcard `*.hubris.network → 82.165.190.79`.
- **Docker stack** at `/opt/docker-compose.yml`: `traefik` (TLS/ACME) + `dashboard` + `mgmt` + `signal` + `relay` + `proxy` — netbird-mgmt 0.71.3 vanilla deploy since 2026-05-21 (see [mesh.md changelog](mesh.md#changelog)).
- **Host services (outside docker):** `coturn` (TURN-TCP on :3478, long-term creds at `/root/turn-pass.txt`, used by mgmt's `TURNConfig`).
- **Host services (outside docker):** `coturn` (TURN-TCP on :3478, long-term creds rendered into `/etc/turnserver.conf` by `homelab render-vps-configs` from sops-encrypted `secrets/turn-shared-secret.yaml`).
- **Config rendering:** `/etc/turnserver.conf` + `/opt/management.json` are generated from templates in `vps/*.tmpl` on this repo by `homelab render-vps-configs`. Secret placeholders (`{{TURN_PASSWORD}}`, `{{AUTHENTIK_CLIENT_SECRET}}`) are substituted from sops-encrypted secrets decrypted on hubris and pushed over ssh. **Do not hand-edit those two files on the VPS** — the next render will overwrite them.
## SSH