infrastructure/nixos/hosts/olympus/dex/configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:
let
  vs = config.vault-secrets.secrets;
  db_user = "dex";
  db_name = "dex";
  inherit (config.meta.exposes.dex) port;
  metricsPort = 5558;
in {
  imports = [ ];

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "23.05"; # Did you read the comment?

  networking.firewall.allowedTCPPorts = [ port metricsPort ];

  services.postgresql = {
    enable = true;
    package = pkgs.postgresql_15;
    ensureDatabases = [ db_name ];
    ensureUsers = [{
      name = db_user;
      ensurePermissions = {
        "DATABASE ${db_name}" = "ALL PRIVILEGES";
        "schema public" = "ALL";
      };
    }];
  };

  vault-secrets.secrets.dex = { };

  services.dex = {
    enable = true;
    settings = {
      issuer = "https://dex.0x76.dev";
      storage = {
        type = "postgres";
        config = {
          host = "/var/run/postgresql";
          user = db_user;
          database = db_name;
        };
      };
      web.http = "0.0.0.0:${toString port}";
      telemetry.http = "0.0.0.0:${toString metricsPort}";

      connectors = [{
        type = "gitea";
        id = "gitea";
        name = "Gitea";
        config = {
          clientID = "$GITEA_CLIENT_ID";
          clientSecret = "$GITEA_CLIENT_SECRET";
          redirectURI = "https://dex.0x76.dev/callback";
          baseURL = "https://git.0x76.dev";
        };
      }];

      staticClients = [
        {
          id = "outline";
          name = "Outline";
          redirectURIs = [ "https://outline.0x76.dev/auth/oidc.callback" ];
          secretEnv = "OUTLINE_CLIENT_SECRET";
        }
        {
          id = "grafana";
          name = "Grafana";
          redirectURIs = [ "https://grafana.0x76.dev/login/generic_oauth" ];
          secretEnv = "GRAFANA_CLIENT_SECRET";
        }
        {
          id = "hedgedoc";
          name = "Hedgedoc";
          redirectURIs = [ "https://md.0x76.dev/auth/oauth2/callback" ];
          secretEnv = "HEDGEDOC_CLIENT_SECRET";
        }
        {
          id = "flux";
          name = "Weave Gitops Flux Dashboard";
          redirectURIs = [ "https://flux.0x76.dev/oauth2/callback" ];
          secretEnv = "FLUX_CLIENT_SECRET";
        }
      ];
    };

    environmentFile = "${vs.dex}/environment";
  };
}