Update nodes.yaml

TOSCA/types/nodes.yaml

@@ -99,6 +99,7 @@ node_types:
       user_name:
         type: string
         required: true
+        default: vm_user
       host_name:
         type: string
         required: true
@@ -107,24 +108,29 @@ node_types:
         required: true
         constraints:
           - greater_or_equal: 1
+        default: 1
       cpu_frequency:
         type: scalar-unit.frequency
         required: true
         constraints:
-          - greater_or_equal: 0.1 GHz
+          - greater_or_equal: 0.5 GHz
+          default: 1.2 GHz
       disk_size:
         type: scalar-unit.size
         required: true
         constraints:
           - greater_or_equal: 0 MB
+          default: 25000 MB
       mem_size:
         type: scalar-unit.size
         required: true
         constraints:
           - greater_or_equal: 0 MB
+        default: 2000 MB
       os:
         type: string
         required: true       
+        default: "ubuntu 15"
     interfaces:
       Standard:
         create: dumy.yaml