Azure DNS - Setting Up a Custom DNS within Azure DNS

Prerequisites

You must have a domain name available to test with that you can host in Azure DNS. You must have full control of this domain. Full control includes the ability to set the name server (NS) records for the domain.

Create a DNS zone

1. Go to the Azure portal to create a DNS zone. Search for and select DNS zones.
2. Select Create DNS zone.
3. On the Create DNS zone page, enter the following values, and then select Create. For example:

   Setting	Example Value	Details
   Resource group	edgc-dns-rg	Create a resource group. The resource group name must be unique within the subscription that you selected. The location of the resource group has no impact on the DNS zone. Note to reference this resource group as parent_dns_zone_rg_name in terraform.tfvars config file.
   Zone child	leave unchecked	Since this zone is not a child zone you should leave this unchecked
   Name	contoso.com	Field for your parent zone name. Note to DNS as parent_dns_zone_name in terraform.tfvars config file.
   Location	North Europe	This field is based on the location selected as part of Resource group creation

Retrieve name servers

Before you can delegate your DNS zone to Azure DNS, you need to know the name servers for your zone.

1. With the DNS zone created, in the Azure portal Favorites pane, select All resources. On the All resources page, select your DNS zone.
2. Retrieve the name servers from the DNS zone page. the assigned ns will look similar to: ns1-01.azure-dns.com, ns2-01.azure-dns.net, ns3-01.azure-dns.org, and ns4-01.azure-dns.info.

Delegate the domain

Once the DNS zone gets created and you have the name servers, you’ll need to update the parent domain with the Azure DNS name servers. Each registrar has its own DNS management tools to change the name server records for a domain.

1. In the registrar’s DNS management page, edit the NS records and replace the NS records with the Azure DNS name servers.
2. When you delegate a domain to Azure DNS, you must use the name servers that Azure DNS provides. Use all four name servers, regardless of the name of your domain. Domain delegation doesn’t require a name server to use the same top-level domain as your domain.
3. Once All Azure NS have been set and podagated, you can verify the DNS by testing with the follwoing command to verify the NS records.

For Windows verify DNS in command pronmpt

nslookup -type=SOA contoso.com

For linux/Mac verify DNS in command pronmpt

dig contoso.com

Applying DNS values to terraform.tfvars

Here are the relavent DNS varables required for terraform.tfvars file.

..
parent_dns_zone_name                = "contoso.com"
parent_dns_zone_rg_name             = "edgc-dns-rg"
..

Calls to Action

Learn more about Azure DNS and get the most up-to-date information at the Microsoft Docs.

Read about the Visual Studio Code Dev Container in the next section.