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path: root/nix/hosts/corrino/www/grafana.emile.space.nix
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{ config, ... }:

{
  systemd.services.grafana.serviceConfig.EnvironmentFile = config.age.secrets.grafana_env_vars.path;

  services = {
    nginx.virtualHosts = {
      "grafana.emile.space" = {
        addSSL = true;
        enableACME = true;
        locations."/" = {
          proxyPass = "http://${toString config.services.grafana.settings.server.http_addr}:${toString config.services.grafana.settings.server.http_port}/";
          proxyWebsockets = true;
        };
      };
    };

    authelia.instances.main.settings.identity_providers.oidc.clients = [
      {
        id = "Grafana";

        # ; nix run nixpkgs#authelia -- crypto hash generate pbkdf2 --variant sha512 --random --random.length 72 --random.charset rfc3986
        secret = "$pbkdf2-sha512$310000$S.RE0jcmr7Sn/tjJDNxV/A$1tsYhQ/YEcVfE4JyzszHemrcUqy.84Fb6xVSmz87if5C9N46Mz2lRWB5l8s4EIrLsiumPnt4HQMkYZ4MoovJzA";
        public = false;
        authorization_policy = "two_factor";
        redirect_uris = [ "https://grafana.emile.space/login/generic_oauth" ];
        scopes = [
          "openid"
          "email"
          "profile"
          "groups"
        ];
        grant_types = [
          "refresh_token"
          "authorization_code"
        ];
        response_types = [ "code" ];
        response_modes = [
          "form_post"
          "query"
          "fragment"
        ];
      }
    ];

    grafana = {
      enable = true;
      settings = {
        server = {
          http_addr = "127.0.0.1";
          http_port = config.emile.ports.grafana;
          domain = "grafana.emile.space";
          root_url = "https://grafana.emile.space/";
        };

        "auth.generic_oauth" =
          let
            sso = "https://sso.emile.space/api/oidc";
          in
          {
            enabled = true;
            client_id = "Grafana";

            # [auth.generic_oauth]
            # client_secret = ... 
            #   set in env var as 
            #   GF_AUTH_GENERIC_OAUTH_CLIENT_SECRET 
            client_secret = "set in env var this is just a placeholder";

            use_refresh_token = true;
            token_url = "${sso}/token";
            auth_url = "${sso}/authorization";
            api_url = "${sso}/userinfo";

            scopes = [
              "openid"
              "email"
              "profile"
              "groups"
            ];

            email_attribute_path = "email";
            login_attribute_path = "preferred_username";
            name_attribute_path = "name";

            role_attribute_path = "contains(groups[*], 'grafana_server_admin') && 'GrafanaAdmin' || contains(groups[*], 'grafana_admin') && 'Admin' || contains(groups[*], 'grafana_editor') && 'Editor' || 'Viewer'";

          };
      };

      provision = {
        datasources = {
          settings = {
            datasources = [
              {
                url = "http://localhost:${toString config.services.prometheus.port}";
                type = "prometheus";
                name = "Prometheus";
                editable = false;
                access = "proxy"; # server = "proxy", browser = "direct"
              }
              {
                name = "loki";
                url = "http://localhost:${toString config.services.loki.configuration.server.http_listen_port}";
                type = "loki";
              }
            ];
          };
        };
      };
    };
  };
}