add a variable for kube_apiserver at all

contrib/azurerm/group_vars/all

@@ -19,6 +19,8 @@ admin_username: devops
 admin_password: changeme
 ssh_public_key: "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDLRzcxbsFDdEibiyXCSdIFh7bKbXso1NqlKjEyPTptf3aBXHEhVil0lJRjGpTlpfTy7PHvXFbXIOCdv9tOmeH1uxWDDeZawgPFV6VSZ1QneCL+8bxzhjiCn8133wBSPZkN8rbFKd9eEUUBfx8ipCblYblF9FcidylwtMt5TeEmXk8yRVkPiCuEYuDplhc2H0f4PsK3pFb5aDVdaDT3VeIypnOQZZoUxHWqm6ThyHrzLJd3SrZf+RROFWW1uInIDf/SZlXojczUYoffxgT1lERfOJCHJXsqbZWugbxQBwqsVsX59+KPxFFo6nV88h3UQr63wbFx52/MXkX4WrCkAHzN ablock-vwfs@dell-lappy"
 
+kube_apiserver_port: 6443
+
 # Azure CIDRs
 azure_vnet_cidr: 10.0.0.0/8
 azure_admin_cidr: 10.241.2.0/24

contrib/azurerm/roles/generate-templates/templates/masters.json

@@ -62,8 +62,8 @@
                 "id": "[concat(variables('lbID'), '/backendAddressPools/kube-api-backend')]"
               },
               "protocol": "tcp",
-              "frontendPort": 6443,
-              "backendPort": 6443,
+              "frontendPort": "{{kube_apiserver_port}}",
+              "backendPort": "{{kube_apiserver_port}}",
               "enableFloatingIP": false,
               "idleTimeoutInMinutes": 5,
               "probe": {
@@ -77,7 +77,7 @@
             "name": "kube-api",
             "properties": {
               "protocol": "tcp",
-              "port": 6443,
+              "port": "{{kube_apiserver_port}}",
               "intervalInSeconds": 5,
               "numberOfProbes": 2
             }

contrib/azurerm/roles/generate-templates/templates/network.json

@@ -92,7 +92,7 @@
                 "description": "Allow secure kube-api",
                 "protocol": "Tcp",
                 "sourcePortRange": "*",
-                "destinationPortRange": "6443",
+                "destinationPortRange": "{{kube_apiserver_port}}",
                 "sourceAddressPrefix": "Internet",
                 "destinationAddressPrefix": "*",
                 "access": "Allow",