使用ARM模板设置持久化IP地址，示例代码如下：

"backendAddressPools": [
    {
        "name": "backendPool",
        "properties": {
            "backendIPConfigurations": [
                {
                    "id": "[resourceId('Microsoft.Network/networkInterfaces', 'nicName1/ipConfigurations/ipconfig1')]"
                },
                {
                    "id": "[resourceId('Microsoft.Network/networkInterfaces', 'nicName2/ipConfigurations/ipconfig1')]"
                }
            ]
        }
    }
],
"publicIPAddresses": [
    {
        "name": "publicip1",
        "properties": {
            "publicIPAllocationMethod": "Static",
            "dnsSettings": {
                "domainNameLabel": "[concat('dns-prefix-', uniqueString(resourceGroup().id))]"
            }
        }
    },
    {
        "name": "publicip2",
        "properties": {
            "publicIPAllocationMethod": "Static",
            "dnsSettings": {
                "domainNameLabel": "[concat('dns-prefix-', uniqueString(resourceGroup().id))]"
            }
        }
    }
]