Create an Azure DNS private zone using the Azure CLI
The Azure DNS Private Zone feature is currently in public preview.
This procedure walks you through the steps to create your first private DNS zone and record using the Azure CLI.
A DNS zone is used to host the DNS records for a particular domain. To start hosting your domain in Azure DNS, you need to create a DNS zone for that domain name. Each DNS record for your domain is then created inside this DNS zone. To publish a private DNS zone to your virtual network, you specify the list of virtual networks that are allowed to resolve records within the zone. These are called linked virtual networks. When autoregistration is enabled, Azure DNS also updates the zone records whenever a virtual machine is created, changes its' IP address, or is deleted.
In this procedure, you learn how to:
- Create a DNS private zone
- Create test virtual machines
- Create an additional DNS record
- Test the private zone
If you don’t have an Azure subscription, create a free account before you begin.
If you prefer, you can complete this procedure using Azure PowerShell.
Use Azure Cloud Shell
Azure hosts Azure Cloud Shell, an interactive shell environment that you can use through your browser. Cloud Shell lets you use either
PowerShell to work with Azure services. You can use the Cloud Shell pre-installed commands to run the code in this article without having to install anything on your local environment.
To launch Azure Cloud Shell:
|Select Try It in the upper-right corner of a code block. Selecting Try It doesn't automatically copy the code to Cloud Shell.|
|Go to https://shell.azure.com or select the Launch Cloud Shell button to open Cloud Shell in your browser.|
|Select the Cloud Shell button on the top-right menu bar in the Azure portal.|
To run the code in this article in Azure Cloud Shell:
- Open Cloud Shell.
- Select the Copy button on a code block to copy the code.
- Paste the code into the Cloud Shell session with Ctrl+Shift+V on Windows and Linux, or Cmd+Shift+V on macOS.
- Press Enter to run the code.
Create the resource group
First, create a resource group to contain the DNS zone:
az group create --name MyAzureResourceGroup --location "East US"
Create a DNS private zone
The following example creates a virtual network named myAzureVNet. Then it creates a DNS zone named private.contoso.com in the MyAzureResourceGroup resource group, links the DNS zone to the MyAzureVnet virtual network, and enables automatic registration.
az network vnet create \ --name myAzureVNet \ --resource-group MyAzureResourceGroup \ --location eastus \ --address-prefix 10.2.0.0/16 \ --subnet-name backendSubnet \ --subnet-prefixes 10.2.0.0/24 az network private-dns zone create -g MyAzureResourceGroup \ -n private.contoso.com az network private-dns link vnet create -g MyAzureResourceGroup -n MyDNSLink \ -z private.contoso.com -v myAzureVNet -e true
If you want to create a zone just for name resolution (no automatic hostname registration), you could use the
-e false parameter.
List DNS private zones
To enumerate DNS zones, use
az network private-dns zone list. For help, see
az network dns zone list --help.
Specifying the resource group lists only those zones within the resource group:
az network private-dns zone list \ -g MyAzureResourceGroup
Omitting the resource group lists all zones in the subscription:
az network private-dns zone list
Create the test virtual machines
Now, create two virtual machines so you can test your private DNS zone:
az vm create \ -n myVM01 \ --admin-username AzureAdmin \ -g MyAzureResourceGroup \ -l eastus \ --subnet backendSubnet \ --vnet-name myAzureVnet \ --nsg NSG01 \ --nsg-rule RDP \ --image win2016datacenter az vm create \ -n myVM02 \ --admin-username AzureAdmin \ -g MyAzureResourceGroup \ -l eastus \ --subnet backendSubnet \ --vnet-name myAzureVnet \ --nsg NSG01 \ --nsg-rule RDP \ --image win2016datacenter
This will take a few minutes to complete.
Create an additional DNS record
To create a DNS record, use the
az network private-dns record-set [record type] add-record command. For help with adding A records for example, see
az network private-dns record-set A add-record --help.
The following example creates a record with the relative name db in the DNS Zone private.contoso.com, in resource group MyAzureResourceGroup. The fully qualified name of the record set is db.private.contoso.com. The record type is "A", with IP address "10.2.0.4".
az network private-dns record-set a add-record \ -g MyAzureResourceGroup \ -z private.contoso.com \ -n db \ -a 10.2.0.4
View DNS records
To list the DNS records in your zone, run:
az network private-dns record-set list \ -g MyAzureResourceGroup \ -z private.contoso.com
Test the private zone
Now you can test the name resolution for your private.contoso.com private zone.
Configure VMs to allow inbound ICMP
You can use the ping command to test name resolution. So, configure the firewall on both virtual machines to allow inbound ICMP packets.
Connect to myVM01, and open a Windows PowerShell window with administrator privileges.
Run the following command:
New-NetFirewallRule –DisplayName “Allow ICMPv4-In” –Protocol ICMPv4
Repeat for myVM02.
Ping the VMs by name
From the myVM02 Windows PowerShell command prompt, ping myVM01 using the automatically registered host name:
You should see output that looks similar to this:
PS C:\> ping myvm01.private.contoso.com Pinging myvm01.private.contoso.com [10.2.0.4] with 32 bytes of data: Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Reply from 10.2.0.4: bytes=32 time=1ms TTL=128 Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Ping statistics for 10.2.0.4: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 1ms, Average = 0ms PS C:\>
Now ping the db name you created previously:
You should see output that looks similar to this:
PS C:\> ping db.private.contoso.com Pinging db.private.contoso.com [10.2.0.4] with 32 bytes of data: Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Reply from 10.2.0.4: bytes=32 time<1ms TTL=128 Ping statistics for 10.2.0.4: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms PS C:\>
Delete all resources
When no longer needed, delete the MyAzureResourceGroup resource group to delete the resources created in this procedure.
az group delete --name MyAzureResourceGroup
In this procedure, you deployed a private DNS zone, created a DNS record, and tested the zone. Next, you can learn more about private DNS zones.