fix: add option to disable ssh port forwarding

In out CI we need an option to disable all
port forwardings to avoid port collisions
in parallel pipeline runs.

Signed-off-by: Paul Kroeher <paul.kroeher@cyberus-technology.de>
On-behalf-of: SAP paul.kroeher@sap.com

Author: pkr4711

modules/testing/default.nix

@@ -54,6 +54,35 @@ let
       };
     };
 
+  portForwardingStorage =
+    { config, lib, ... }:
+    with lib;
+    let
+      cfg = config.openstack-testing;
+    in
+    {
+      options.openstack-testing = {
+        enable = mkEnableOption "Enable port forwarding." // {
+          default = true;
+        };
+        sshHostPort = mkOption {
+          type = types.port;
+          description = ''
+            Host port to make the ssh server availalbe.
+          '';
+        };
+      };
+      config = mkIf cfg.enable {
+        virtualisation.forwardPorts = [
+          {
+            from = "host";
+            host.port = cfg.sshHostPort;
+            guest.port = 22;
+          }
+        ];
+      };
+    };
+
   portForwarding =
     { config, lib, ... }:
     with lib;
@@ -92,6 +121,12 @@ let
             the configuration of the dashboard.
           '';
         };
+        sshHostPort = mkOption {
+          type = types.port;
+          description = ''
+            Host port to make the ssh server availalbe.
+          '';
+        };
       };
       config = mkIf cfg.enable {
         virtualisation.forwardPorts = [
@@ -110,6 +145,11 @@ let
             host.port = cfg.vncProxyHostPort;
             guest.port = 6080;
           }
+          {
+            from = "host";
+            host.port = cfg.sshHostPort;
+            guest.port = 22;
+          }
         ];
       };
     };
@@ -132,6 +172,9 @@ in
         portForwarding
       ];
 
+      openstack-testing.enable = true;  # enable / disable all port forwardings
+      openstack-testing.sshHostPort = 1122;
+
       virtualisation = {
         cores = 4;
         memorySize = 6144;
@@ -144,14 +187,6 @@ in
             vlan = 2;
           };
         };
-        # enable ssh access
-        forwardPorts = [
-          {
-            from = "host";
-            host.port = 1122;
-            guest.port = 22;
-          }
-        ];
       };
 
       systemd.services.openstack-create-vm = {
@@ -278,7 +313,13 @@ in
     { ... }:
     {
 
-      imports = [ common ];
+      imports = [
+        common
+        portForwardingStorage
+      ];
+
+      openstack-testing.enable = true;  # enable / disable all port forwardings
+      openstack-testing.sshHostPort = 2022;
 
       virtualisation = {
         memorySize = 4096;
@@ -296,14 +337,6 @@ in
             vlan = 2;
           };
         };
-        # enable ssh access
-        forwardPorts = [
-          {
-            from = "host";
-            host.port = 2022;
-            guest.port = 22;
-          }
-        ];
       };
 
       systemd.network = {