How to attach the network interface that have public IP to scaleset vm with application gateway

Question

I want to attach a network interface that have public IP to scaleset vm with application gateway.

Is it possible?

Answer 1

@kokioji

Welcome to Microsoft Q&A and thank you for posting your question here!!

To attach network interface that have a public IP address, by default there will be allocated public-ip address to VM. You can create a scale set with configurable virtual machine domain names using below information as a sample JSON code:

"networkProfile": {
  "networkInterfaceConfigurations": [
    {
    "name": "nic1",
    "properties": {
      "primary": true,
      "ipConfigurations": [
      {
        "name": "ip1",
        "properties": {
          "subnet": {
            "id": "[concat('/subscriptions/', subscription().subscriptionId,'/resourceGroups/', resourceGroup().name, '/providers/Microsoft.Network/virtualNetworks/', variables('vnetName'), '/subnets/subnet1')]"
          },
          "publicIPAddressconfiguration": {
            "name": "publicip",
            "properties": {
            "idleTimeoutInMinutes": 10,
              "dnsSettings": {
                "domainNameLabel": "[parameters('vmssDnsName')]"
              }
            }
          }
        }
      }
    ]
    }
}

Also, you can create a scale set with public IP per virtual machine with following JSON sample code.

"publicIpAddressConfiguration": {
    "name": "pub1",
    "sku": {
      "name": "Standard"
    },
    "properties": {
      "idleTimeoutInMinutes": 15
    }
}

Likewise, you can configure multiple IP address per NIC.

Have a good success in your configurations and let me know if this information help you or you need more details.

Cheers,

Sina

Answer 2

@kokioji

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I understand that you would like to add a VMSS behind an App gateway.

I am not sure why having a public IP on the NIC of a VMSS should matter, however, you can always add a VMSS as backend pool of App Gateway.

Refer : https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-components#backend-pools

Kindly let us know if the above helps or you need further assistance on this issue.

Thanks,

Kapil

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