Deploy-Default-Udr.AzureChinaCloud.json

{
  "name": "Deploy-Default-Udr",
  "type": "Microsoft.Authorization/policyDefinitions",
  "apiVersion": "2021-06-01",
  "scope": null,
  "properties": {
    "policyType": "Custom",
    "mode": "Indexed",
    "displayName": "Deploy a user-defined route to a VNET with specific routes.",
    "description": "Deploy a user-defined route to a VNET with routes from spoke to hub firewall. This policy must be assigned for each region you plan to use.",
    "metadata": {
      "version": "1.0.0",
      "category": "Network",
      "source": "https://github.com/Azure/Enterprise-Scale/",
      "alzCloudEnvironments": [
        "AzureChinaCloud"
      ]
    },
    "parameters": {
      "defaultRoute": {
        "type": "String",
        "metadata": {
          "displayName": "Default route to add into UDR",
          "description": "Policy will deploy a default route table to a vnet"
        }
      },
      "vnetRegion": {
        "type": "String",
        "metadata": {
          "displayName": "VNet Region",
          "description": "Regional VNet hub location",
          "strongType": "location"
        }
      },
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        },
        "allowedValues": [
          "DeployIfNotExists",
          "Disabled"
        ],
        "defaultValue": "DeployIfNotExists"
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.Network/virtualNetworks"
          },
          {
            "field": "location",
            "equals": "[[parameters('vnetRegion')]"
          }
        ]
      },
      "then": {
        "effect": "[[parameters('effect')]",
        "details": {
          "type": "Microsoft.Network/routeTables",
          "roleDefinitionIds": [
            "/providers/Microsoft.Authorization/roleDefinitions/4d97b98b-1d4f-4787-a291-c67834d212e7"
          ],
          "existenceCondition": {
            "allOf": [
              {
                "field": "Microsoft.Network/routeTables/routes[*].nextHopIpAddress",
                "equals": "[[parameters('defaultRoute')]"
              }
            ]
          },
          "deployment": {
            "properties": {
              "mode": "incremental",
              "parameters": {
                "udrName": {
                  "value": "[[concat(field('name'),'-udr')]"
                },
                "udrLocation": {
                  "value": "[[field('location')]"
                },
                "defaultRoute": {
                  "value": "[[parameters('defaultRoute')]"
                }
              },
              "template": {
                "$schema": "http://schema.management.azure.com/schemas/2018-05-01/subscriptionDeploymentTemplate.json",
                "contentVersion": "1.0.0.0",
                "parameters": {
                  "udrName": {
                    "type": "string"
                  },
                  "udrLocation": {
                    "type": "string"
                  },
                  "defaultRoute": {
                    "type": "string"
                  }
                },
                "variables": {},
                "resources": [
                  {
                    "type": "Microsoft.Network/routeTables",
                    "name": "[[parameters('udrName')]",
                    "apiVersion": "2020-08-01",
                    "location": "[[parameters('udrLocation')]",
                    "properties": {
                      "routes": [
                        {
                          "name": "AzureFirewallRoute",
                          "properties": {
                            "addressPrefix": "0.0.0.0/0",
                            "nextHopType": "VirtualAppliance",
                            "nextHopIpAddress": "[[parameters('defaultRoute')]"
                          }
                        }
                      ]
                    }
                  }
                ],
                "outputs": {}
              }
            }
          }
        }
      }
    }
  }
}