Create CNAME record?

[jnus]

Hi
Need to create a cname record for at custom DNS zone i Azure. Is this possible, and can anyone point me to an example? I've looked at the documentation for 'Microsoft.Network/dnsZones/CNAME@2018-05-01' and I'm quite puzzled how to define e.g. the zone of interest and alias address.

[StefanIvemo]

Here's an example on how to create a CNAME record using Bicep.

resource dnsZone 'Microsoft.Network/dnsZones@2018-05-01' existing = {
  name: 'mydomain.org'
}

resource cnameRecord 'Microsoft.Network/dnsZones/CNAME@2018-05-01' = {
  name: 'dnsRecordName'
  parent: dnsZone
  properties: {
    TTL: 3600
    CNAMERecord: {
      cname: 'targetname.targetdomain.com'
    }
  }
}

[jnus]

Thank you for the examples! When using az to deploy this bicep file, what scope should be used? I've tried sub and tenant without any luck. Group does make any sense.

[brwilkinson]

DNS Zones are Global resources I.e. Location, however they are deployed into a resource group I.e. Scope.

[jnus]

Aha - makes sense, I expect it to be the resource group owning the actual DNS Zone resource right and not the e.g. web app I'm using it for?

[brwilkinson]

Yes the web app will have its own Azurewebsites specific, globally unique name that maps to the default Azure owned DNS name, then you can create your own (new) DNS zone, which is not directly related, which can be in the same or alternate resource group, as your web app.

You can then create the (custom) cname record in the zone, that references/points to the Azurewebsites name.

You will have a certificate with your custom domain, at the website or firewall etc. That matches the cname or else a wildcard cert for the domain.

[Gonkers]

Thank you for the example. I was banging my head on the wall. The TTL wasn't marked as a required parameter in the linter. Your example made the 💡turn on.