azure - ARM 模板 - 有条件地添加到数组

Question

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {        
        "externalSubnet1": {
            "type": "string",
            "defaultValue": ""
        }
    },
    "variables": {
        "SQLServerName": "someName",
        "SQLDatabaseName": "someDatabase",
        "Subnet1": "/subscriptions/771adxxx-xxxx-xxxx-9xxx-xxxxxxxxxxxx/resourceGroups/some_resource_group/providers/Microsoft.Network/virtualNetworks/some_vnet/subnets/some_subnet1",
        "Subnet2": "/subscriptions/771adxxx-xxxx-xxxx-9xxx-xxxxxxxxxxxx/resourceGroups/some_resource_group/providers/Microsoft.Network/virtualNetworks/some_vnet/subnets/some_subnet1",
    },
    "resources": [{
            "name": "[variables('SQLServerName')]",
            "type": "Microsoft.Sql/servers",
            "location": "Central US",
            "apiVersion": "2021-05-01-preview",
            "dependsOn": [],
            "tags": {
                "displayName": "Logical SQL Server"
            },
            "kind": "v12.0",
            "properties": {
                "administratorLogin": "xyz",
                "administratorLoginPassword": "xyz",
                "version": "12.0"
            },
            "resources": [
                {
                    "type": "Microsoft.Sql/servers/virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "x1",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[parameters('externalSubnet1')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }, {
                    "type": "Microsoft.Sql/servers/virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "x2",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[variables('Subnet1')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }, {
                    "type": "Microsoft.Sql/servers/virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "x3",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[variables('Subnet2')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }
            ]
        }
    ]
}

我有以下 ARM 模板。最里面的资源数组有3条虚拟网络规则。我想要的是，如果参数 externalSubnet1 的值存在，即它是非空字符串，那么我希望包含资源数组的第一个元素。这是有道理的，因为变量 externalSubnet1 需要是有效的子网 ID(类似于变量 Subnet1 或 Subnet2)，否则部署将失败。

我尝试了什么？

我查看了condition但它处于资源级别，因此无法使用它。

我还查看了if但问题是它仍然在数组中包含带有空白 virtualNetworkSubnetId 的 JSON block ，并且也会失败。我希望排除 virtualNetworkRules 资源数组的整个第一个元素(JSON block )，即当参数 externalSubnet1 为空字符串时，数组中应该只有 2 个元素。

那么，我们如何才能实现这一目标呢？谢谢。

Answer 1

如果我理解正确，那么您希望根据字符串参数 externalsubnet1 有条件地执行VirtualNetworkRule/strong> 。如果参数值存在，则将执行x1，如果值为空，则执行x2 和 x3 将被执行。在这种情况下，您可以使用以下模板:

模板:

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {        
        "externalSubnet1": {
            "type": "string"
        }
    },
    "variables": {
        "SQLServerName": "ansserver",
        "Subnet1": "/subscriptions/xxxxxxxxxxxxxxxxxxxxxxxxx/resourceGroups/ansumantest/providers/Microsoft.Network/virtualNetworks/ansuman-vnet/subnets/default",
        "Subnet2": "/subscriptions/xxxxxxxxxxxxxxxxxxxx/resourceGroups/ansumantest/providers/Microsoft.Network/virtualNetworks/ansuman-vnet/subnets/subnet1"
    },
    "resources": [{
            "name": "[variables('SQLServerName')]",
            "type": "Microsoft.Sql/servers",
            "location": "East US",
            "apiVersion": "2015-05-01-preview",
            "properties": {
                "administratorLogin": "ansuman",
                "administratorLoginPassword": "password",
                "version": "12.0",
                "publicNetworkAccess":"Enabled"
            },
            "resources": [
                {   
                    "condition":"[not(empty(parameters('externalSubnet1')))]",
                    "type": "virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "[concat(variables('SQLServerName'),'test1')]",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[parameters('externalSubnet1')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }, {
                    "condition":"[empty(parameters('externalSubnet1'))]",
                    "type": "virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "[concat(variables('SQLServerName'),'test2')]",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[variables('Subnet1')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }, {
                    "condition":"[empty(parameters('externalSubnet1'))]",
                    "type": "virtualNetworkRules",
                    "apiVersion": "2021-05-01-preview",
                    "name": "[concat(variables('SQLServerName'),'test3')]",
                    "dependsOn": ["[resourceId('Microsoft.Sql/servers', variables('SQLServerName'))]"],
                    "properties": {
                        "virtualNetworkSubnetId": "[variables('Subnet2')]",
                        "ignoreMissingVnetServiceEndpoint": false
                    }
                }
            ]
        }
    ]
}

输出: