You have a more number of options when it comes to resolving names using DNS. Microsoft Azure DNS is one of such option. In this post, we will discuss How to create new DNS in the Azure Private DNS using PowerShell

To manage Azure DNS, you can configure it through Azure Portal UI or command-line tools like the Azure CLI or PowerShell. Often admins need to manage DNS at scale or automate the management of various objects. A great way to do that isn’t via a graphical method like the Azure Portal but with a scripting tool like PowerShell (as we can automate).

Azure DNS is a managed DNS solution. We can use it for public DNS records (use the URL for access public) as well as for private DNS records. Using Azure private DNS, we can resolve DNS names in a virtual network. There are many benefits to using Azure private DNS.

  • No additional servers – We do not need to maintain additional servers to run the DNS solution. It is a fully managed service.
  • Automatic Record Update – Similar to Active Directory DNS, we can configure Azure DNS to register/update/delete hostname records for virtual machines automatically.
  • Support common DNS record types – It supports common DNS record types such as A, AAAA, MX, NS, SRV, and TXT.
  • DNS resolution between virtual networks – Azure Private DNS zones can be shared between virtual networks.

 As we had to set many URLs so we thought to have automation to create through Azure DevOps Pipeline.

using New-AzPrivateDnsRecordSet cmdlet we can able to create a new DNS record in the Azure DNS zone and Get-AzPrivateDnsRecordSet will use to list out all the DNS records which were created. The Set-AzPrivateDnsRecordSet cmdlet updates a record set in the Azure Private DNS service from a local RecordSet object. You can pass a RecordSet object as a parameter or by using the pipeline operator

Prequistion for making automation for creating a record set in a Private DNS zone.

  • -Name : The name of the records in this record set (relative to the name of the zone and without a terminating dot).
  • -RecordType : The type of Private DNS records in this record set (values may be A, AAAA, CNAME, MX, PTR, SOA, SRV, TXT)
  • -ZoneName : The zone in which to create the record set (without a terminating dot). In my case, all the domains need to be like .cloud.dotnethelpers.com. for example,
    preprod.cloud.dotnethelpers.com.
  • -ResourceGroupName : The resource group to which the zone belongs.
  • -Ttl : The TTL value of all the records in this record set.
  • -PrivateDnsRecords : The private DNS records that are part of this record set.
  • -Ipv4Address: The IPv4 address for the A record to add. For me this ip from the ingress, in your case it may be your server or anything.

Script: How to create new DNS

New-AzPrivateDnsRecordSet -Name pprd -RecordType A -ZoneName “cloud.dotnethelpers.com” -ResourceGroupName “rg-dgtl-network-pprd” -Ttl 3600 -PrivateDnsRecords (New-AzPrivateDnsRecordConfig -IPv4Address “10.55.161.23”)

Script: How to get DNS record details

Get-AzPrivateDnsRecordSet -ResourceGroupName ‘rg-dgtl-network-pprd’ -ZoneName ‘cloud.dotnethelpers.com’ -RecordType A

Script: How to detect DNS record

$RecordSet = Get-AzPrivateDnsRecordSet -Name “cd-ppr” -ResourceGroupName “rg-dgtl-network-pprd” -ZoneName “cloud.dotnethelpers.com” -RecordType A
Remove-AzPrivateDnsRecordSet -RecordSet $RecordSet

Output: 

The final URL will be pprd.cloud.dotnethelpers.com

How to create a new DNS

Points to Remember:

Before running the above script ensure you have installed the required module in PowerShell to connect to the Azure portal to access the resources (connect using the Connect-AzAccount cmdlet). I hope you have a basic idea about How to create  new DNS in the Azure Private DNS using PowerShell, if any queries please comment so I can able to answer ASAP.

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