feature: the router keeps its metrics in PostgreSQL, serves them for an OpenTelemetry Collector and pushes them over OTLP.

debian-package/debian/control

@@ -23,6 +23,8 @@ Depends: ${misc:Depends},
          python3-ldap,
          python3-pyotp,
          python3-psycopg,
+         python3-psutil,
+         python3-prometheus-client,
          postgresql,
          slapd,
          openvpn,
@@ -35,8 +37,9 @@ Description: Linux VPN router with IPSec, road-warrior, OpenVPN and WireGuard su
  IKEv2 IPSec (strongSwan swanctl), optional road-warrior access using EAP-TLS,
  optional OpenVPN with a certificate and a password per user, kept in a local
  LDAP directory, optional WireGuard, and the routing, NAT, MSS clamping and
- firewall rules a router needs. Nothing in the package is specific to a cloud
- provider.
+ firewall rules a router needs. It keeps metrics of the router in PostgreSQL
+ and serves them for an OpenTelemetry Collector. Nothing in the package is
+ specific to a cloud provider.
  .
  Settings live in /etc/vpn-router/vpn-router.json, which is created on first
  install and owned by the administrator afterwards. Editing it and restarting