os/hosts/flora-6/caddy.nix

{
  config,
  lib,
  pkgs,
  self,
  ...
}: let
  maintenanceMode = {
    logFormat = lib.mkForce ''
      output discard
    '';
    extraConfig = ''
      root * /srv/www/pub.solar

      error * "Scheduled Maintenance" 503

      handle_errors {
        root * /srv/www/pub.solar
        rewrite * /maintenance/index.html
        file_server
      }
    '';
  };
in {
  systemd.tmpfiles.rules = [
    "d '/data/srv/www/os/download/' 0750 hakkonaut hakkonaut - -"
  ];

  services.caddy = {
    enable = lib.mkForce true;
    group = "hakkonaut";
    email = "admins@pub.solar";
    enableReload = true;
    globalConfig = lib.mkForce ''
      grace_period 60s
    '';
    virtualHosts = {
      "pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          # Named matcher, used below for Mastodon webfinger
          @query query resource=*

          # PubSolarOS images
          handle /os/download/* {
            root * /data/srv/www
            file_server /os/download/* browse
          }
          # serve base domain pub.solar for mastodon.pub.solar
          # https://masto.host/mastodon-usernames-different-from-the-domain-used-for-installation/
          handle /.well-known/host-meta {
            redir https://mastodon.pub.solar{uri}
          }

          # Tailscale OIDC webfinger requirement plus Mastodon webfinger redirect
          handle /.well-known/webfinger {
            # Redirect requests that match /.well-known/webfinger?resource=* to Mastodon
            handle @query {
              redir https://mastodon.pub.solar{uri}
            }
            respond 200 {
              body `{
                "subject": "acct:admins@pub.solar",
                "links": [
                  {
                    "rel": "http://openid.net/specs/connect/1.0/issuer",
                    "href": "https://auth.pub.solar/realms/pub.solar"
                  }
                ]
              }`
            }
          }

          # redirect to statutes
          redir /satzung https://cloud.pub.solar/s/2tRCP9aZFCiWxQy temporary

          # pub.solar website
          handle {
            root * /srv/www/pub.solar
            try_files {path}.html {path}
            file_server
          }
          # minimal error handling, respond with status code and text
          handle_errors {
            respond "{http.error.status_code} {http.error.status_text}"
          }
        '';
      };
      "www.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          redir https://pub.solar{uri}
        '';
      };

      "mastodon.pub.solar" = maintenanceMode;

      "auth.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          redir / /realms/pub.solar/account temporary
          reverse_proxy :8080
        '';
      };
      "git.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          redir /user/login /user/oauth2/keycloak temporary
          reverse_proxy :3000
        '';
      };
      "ci.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          reverse_proxy :4000
        '';
      };
      "stream.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          reverse_proxy :5000
        '';
      };
      "list.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          handle_path /static/* {
            root * /var/lib/mailman-web-static
            file_server
          }

          reverse_proxy :18507
        '';
      };
      "collabora.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          reverse_proxy :9980
        '';
      };
      "obs-portal.pub.solar" = {
        logFormat = lib.mkForce ''
          output discard
        '';
        extraConfig = ''
          reverse_proxy obs-portal.svc.e5756d08-36fd-424b-f8bc-acdb92ca7b82.lev-1.int.greenbaum.zone:3000
        '';
      };
    };
  };
  networking.firewall.allowedTCPPorts = [80 443];
}