add support for azure vnetResourceGroup

inventory/sample/group_vars/all.yml

@@ -76,6 +76,7 @@ bin_dir: /usr/local/bin
 #azure_subnet_name:
 #azure_security_group_name:
 #azure_vnet_name:
+#azure_vnet_resource_group:
 #azure_route_table_name:
 
 ## When OpenStack is used, Cinder version can be explicitly specified if autodetection fails (Fixed in 1.9: https://github.com/kubernetes/kubernetes/issues/50461)

roles/kubernetes/preinstall/tasks/azure-credential-check.yml

@@ -44,6 +44,11 @@
     msg: "azure_vnet_name is missing"
   when: azure_vnet_name is not defined or azure_vnet_name == ""
 
+- name: check azure_vnet_resource_group value
+  fail:
+    msg: "azure_vnet_resource_group is missing"
+  when: azure_vnet_resource_group is not defined or azure_vnet_resource_group == ""
+
 - name: check azure_route_table_name value
   fail:
     msg: "azure_route_table_name is missing"

roles/kubernetes/preinstall/templates/azure-cloud-config.j2

@@ -8,5 +8,6 @@
   "subnetName": "{{ azure_subnet_name }}",
   "securityGroupName": "{{ azure_security_group_name }}",
   "vnetName": "{{ azure_vnet_name }}",
+  "vnetResourceGroup": "{{ azure_vnet_resource_group }}",
   "routeTableName": "{{ azure_route_table_name }}"
 }