New approach

vnet-aks-modified.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "resourceGroupName": {
      "type": "string"  
    },
    "location": {
      "type": "string",
      "defaultValue": "West Europe",
      "metadata": {
        "description": "Geographic Location for all resources."
      }
    },
    "vnetName": {
      "type": "string",
      "defaultValue": "AssessmentVNet",
      "metadata": {
        "description": "Sentia Wordpress Assesment Vnet"
      }
    },
    "vnetAddressPrefix": {
      "type": "string",
      "defaultValue": "10.0.0.0/8",
      "metadata": {
        "description": "Address prefix"
      }
    },
    "subnet1Prefix": {
      "type": "string",
      "defaultValue": "10.240.0.0/16",
      "metadata": {
        "description": "AKS Subnet"
      }
    },
    "subnet1Name": {
      "type": "string",
      "defaultValue": "aks-subnet",
      "metadata": {
        "description": "aks-subnet"
      }
    },
    "subnet2Prefix": {
      "type": "string",
      "defaultValue": "10.241.0.0/27",
      "metadata": {
        "description": "Persistence subnet"
      }
    },
    "subnet2Name": {
      "type": "string",
      "defaultValue": "persistence-subnet",
      "metadata": {
        "description": "persistence-subnet"
      }
    },
    "k8s_cluster_name":{
      "type": "string",
      "defaultValue": "WordpressSentiaAssessment",
      "metadata": {
        "description": "The name of the Azure Kubernetes Service Cluster"
      }
    },
    "kubernetesVersion": {
      "type": "string",
        "defaultValue": "1.14.7",
        "metadata": {
          "description": "The version of the Azure Kubernetes Service Cluster"
        }
    },
    "dnsPrefix": {
      "type": "string",
      "metadata": {
          "description": "Optional DNS prefix to use with hosted Kubernetes API server FQDN."
      }
    },
    "nodeCount": {
      "type": "int",
      "defaultValue": 3,
      "metadata": {
          "description": "The number of nodes that should be created along with the cluster."
      },
      "minValue": 1,
      "maxValue": 100
    },
    "agentVMSize": {
      "type": "string",
      "defaultValue": "Standard_D2_v2",
      "metadata": {
        "description": "The size of the Virtual Machine."
      }
    },
    "servicePrincipalClientId": {
      "metadata": {
        "description": "Client ID (used by cloudprovider)."
      },
      "type": "securestring"
    },
    "servicePrincipalClientSecret": {
      "metadata": {
        "description": "The Service Principal Client Secret."
      },
      "type": "securestring"
    },
    "serviceCidr": {
      "type": "string",
        "metadata": {
            "description": "A CIDR notation IP range from which to assign service cluster IPs."
        },
        "defaultValue": "100.0.0.0/16"
    },
    "dnsServiceIP": {
      "type": "string",
        "metadata": {
          "description": "Containers DNS server IP address."
        },
        "defaultValue": "100.0.0.10"
    },
    "dockerBridgeCidr": {
      "type": "string",
      "metadata": {
          "description": "A CIDR notation IP for Docker bridge."
      },
      "defaultValue": "172.17.0.1/16"
    },
    "environmentName": {
      "type": "string",
      "metadata": {
        "description": "Environment name for tagging purposes, e.g. dev, accp, prod"
      }
    }
  },
  "variables": {
    "osDiskSizeGB": 1023,
    "osType": "Linux",
    "maxPods": 110,
    "networkPlugin": "kubenet",
    "vnetSubnetID": "[resourceId(parameters('resourceGroupName'),'Microsoft.Network/virtualNetworks/subnets',parameters('vnetName'),parameters('subnet1Name'))]"
  },
  "resources": [
    {
      "type": "Microsoft.Resources/resourceGroups",
      "apiVersion": "2018-05-01",
      "location": "[parameters('location')]",
      "name": "[parameters('resourceGroupName')]",
      "properties": {}
    },
    {
      "type": "Microsoft.Resources/deployments",
      "apiVersion": "2018-05-01",
      "name": "storageDeployment",
      "resourceGroup": "[parameters('resourceGroupName')]",
      "dependsOn": [
          "[resourceId('Microsoft.Resources/resourceGroups/', parameters('resourceGroupName'))]"
      ],
      "properties": {
        "mode": "Incremental",
        "template": {
          "$schema":"https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
          "contentVersion": "1.0.0.0",
          "parameters": {},
          "variables": {},
          "resources": [
            {
              "apiVersion": "2018-10-01",
              "type": "Microsoft.Network/virtualNetworks",
              "name": "[parameters('vnetName')]",
              "location": "[parameters('location')]",
              "properties": {
                "subnets": [
                  {
                    "name": "[parameters('subnet1Name')]",
                    "properties": {
                      "addressPrefix": "[parameters('subnet1Prefix')]"
                    }
                  },
                  {
                    "name": "[parameters('subnet2Name')]",
                    "properties": {
                      "addressPrefix": "[parameters('subnet2Prefix')]",
                      "serviceEndpoints": [
                        {
                          "service": "Microsoft.Storage",
                          "locations": "[parameters('location')]"
                        },
                        {
                          "service": "Microsoft.Sql",
                          "locations": "[parameters('location')]"
                        }
                      ]
                    }
                  }
                ],      
                "addressSpace": {
                  "addressPrefixes": [
                    "[parameters('vnetAddressPrefix')]"
                  ]
                }
              },
              "tags": {
                "Environment": "[parameters('environmentName')]"
              }
            },
            {
              "apiVersion": "2019-06-01",
              "dependsOn": [
                "[resourceId(parameters('resourceGroupName'),'Microsoft.Network/virtualNetworks/subnets',parameters('vnetName'),parameters('subnet1Name'))]"
              ],
              "type": "Microsoft.ContainerService/managedClusters",
              "location":"[parameters('location')]",
              "name": "[concat(parameters('k8s_cluster_name'), '-aks')]",
              "properties":{
                "kubernetesVersion":"[parameters('kubernetesVersion')]",
                "enableRBAC": true,
                "dnsPrefix": "[concat(parameters('k8s_cluster_name'),'-dns')]",
                "agentPoolProfiles":[
                  {
                    "name":"defaultpool",
                    "osDiskSizeGB": "[variables('osDiskSizeGB')]",
                    "count":"[parameters('nodeCount')]",
                    "vmSize": "[parameters('agentVMSize')]",
                    "osType": "[variables('osType')]",
                    "storageProfile": "ManagedDisks",
                    "type": "VirtualMachineScaleSets",
                    "vnetSubnetID": "[variables('vnetSubnetID')]",
                    "maxPods": "[variables('maxPods')]"
                  }
                ],
                "servicePrincipalProfile": {
                    "ClientId": "[parameters('servicePrincipalClientId')]",
                    "Secret": "[parameters('servicePrincipalClientSecret')]"
                },
                "networkProfile": {
                  "networkPlugin": "[variables('networkPlugin')]",
                  "serviceCidr": "[parameters('serviceCidr')]",
                  "dnsServiceIP": "[parameters('dnsServiceIP')]",
                  "dockerBridgeCidr": "[parameters('dockerBridgeCidr')]"
                }
              },
              "tags": {
                "Environment": "[parameters('environmentName')]"
              }
            }  
          ]
        }
      }
    }    
  ]
}