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path: root/hosts/common/server/traefik.nix
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{ pkgs, config, lib, ... }:

let
  domain = "fcuny.xyz";
  mkServiceConfig = name: url: {
    http.routers."${name}" = {
      rule = "Host(`${name}.${domain}`)";
      service = "${name}";
      tls.certResolver = "le";
    };
    http.services."${name}" = { loadBalancer.servers = [{ url = url; }]; };
  };
in {
  age.secrets.traefik_gcp_sa.file = "${inputs.self}/secrets/traefik/gcp_sa.age";

  services.traefik = {
    enable = true;

    dynamicConfigOptions = {
      http.middlewares.redirect-to-https.redirectscheme = {
        scheme = "https";
        permanent = true;
      };
      http = {
        services = {
          dash.loadBalancer.servers = [{ url = "http://127.0.0.1:3000"; }];
        };
      };
    };

    staticConfigOptions = {
      metrics.prometheus = {
        addEntryPointsLabels = true;
        addRoutersLabels = true;
        addServicesLabels = true;
      };

      global = {
        checkNewVersion = false;
        sendAnonymousUsage = false;
      };

      accessLog.format = "json";
      log.level = "warn";

      entryPoints.web.address = ":80";
      entryPoints.websecure.address = ":443";
      certificatesResolvers = {
        le = {
          email = "franck@fcuny.net";
          storage = "/var/lib/traefik/cert.json";
          dnsChallenge = {
            provider = "gcloud";
            delayBeforeCheck = 0;
          };
        };
      };
    };
  };

  services.traefik.dynamicConfigOptions =
    mkMerge [ (mkServiceConfig "dash" "http://127.0.0.1:3000/") ];

  config.systemd.services.traefik.environment.GCE_SERVICE_ACCOUNT_FILE =
    config.age.secrets.cloudflare_api_key.path;
  config.systemd.services.traefik.environment.GCE_PROJECT = "fcuny-homelab";

  config.networking.firewall.allowedTCPPorts = [ 80 443 ];
  config.networking.firewall.allowedUDPPorts = [ 443 ]; # QUIC
}