Define nbd2 schema

software/kvm/instance-kvm-input-schema.json

@@ -51,6 +51,20 @@
       "maximum": 65535
     },
 
+    "nbd2-host": {
+      "title": "Second NBD hostname",
+      "description": "hostname (or IP) of the second NBD server (containing drivers for example).",
+      "type": "string",
+      "format": ["host-name", "ip-address", "ipv6"],
+    },
+    "nbd2-port": {
+      "title": "Second NBD port",
+      "description": "Port of the second NBD server containing the boot image.",
+      "type": "integer",
+      "minimum": 1,
+      "maximum": 65535
+    },
+
 
     "frontend-instance-guid": {
       "title": "Frontend Instance ID",