hydra: configure hydra host

config/hosts/hydra/nginx.nix

@@ -0,0 +1,58 @@
+{ config, pkgs, ... }:
+
+let
+  domain = "hydra.hamburg.ccc.de";
+in
+{
+  services.nginx = {
+    enable = true;
+
+    virtualHosts = {
+      "acme-${domain}" = {
+        default = true;
+        enableACME = true;
+        serverName = "${domain}";
+
+        listen = [
+          {
+            addr = "0.0.0.0";
+            port = 31820;
+          }
+        ];
+      };
+
+      "${domain}" = {
+        default = true;
+        forceSSL = true;
+        useACMEHost = "${domain}";
+
+        listen = [
+          {
+            addr = "0.0.0.0";
+            port = 8443;
+            ssl = true;
+            proxyProtocol = true;
+          }
+        ];
+
+        locations."/" = {
+          proxyPass = "http://${config.services.hydra.listenHost}:${builtins.toString config.services.hydra.port}";
+        };
+
+        extraConfig = ''
+          # Make use of the ngx_http_realip_module to set the $remote_addr and
+          # $remote_port to the client address and client port, when using proxy
+          # protocol.
+          # First set our proxy protocol proxy as trusted.
+          set_real_ip_from 172.31.17.140;
+          # Then tell the realip_module to get the addreses from the proxy protocol
+          # header.
+          real_ip_header proxy_protocol;
+        '';
+      };
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 8443 31820 ];
+  networking.firewall.allowedUDPPorts = [ 8443 ];
+}