updating dns CNAME

user_8283627 0
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I'm trying to update a bunch of dns cname entry, using azure-powershell.
I have no troubles getting the dns entry I need to update, but my problem starts when trying to update the cname (due to the fact there can be only one cname entry).

I went to azure documentation, and found about set-azdnsrecordset, but I failed to find the correct parameter/syntax to update the CNAME

Here is what I tried.

$rs = Get-AzDnsRecordSet -name "test1" -RecordType CNAME -ZoneName "zone.io" -ResourceGroupName "dns"
$rs.Records[0].Records = "new-test-v1.com"
Set-AzDnsRecordSet -RecordSet $rs

With error on $rs.Records[0].Records = "new-test-v1.com":

The property 'Records' cannot be found on this object. Verify that the property exists and can be set.

echo $rs

Id                : /subscriptions/[redacted]/resourceGroups/[redacted]/providers/Microsoft.Network/dnszones/[redacted].io/CNAME/test1
Name              : test1
ZoneName          : zone.io
ResourceGroupName : dns
Ttl               : 3600
Etag              : [redacted]
RecordType        : CNAME
TargetResourceId  :
Records           : {test-v1.com}
Metadata          :
ProvisioningState : Succeeded

PS : I did found a working solution. Deleting/recreating the records works fine enough. I also realise that if something goes wrong in the creation segment, I lose my record (setting failsafe would be a lot of additional work), So I keep it as a last ressort.

azure-powershell azure
2 Answers

One of the workaround to update CNAME records in Azure DNS

To update CNAME we have to remove the existing alias and then have to add a new one. We have tried with below cmdlt and updated the CNAME:

PowerShell Cmd:-

$rs = Get-AzDnsRecordSet -name "rahul" -RecordType CNAME -ZoneName "zone.com" -ResourceGroupName "rgname"
Remove-AzDnsRecordConfig -RecordSet $rs -Cname $rs.Records.cname | Set-AzDnsRecordSet
$newcname = "new-test-v1.com"
Get-AzDnsRecordSet -name "rahul" -RecordType CNAME -ZoneName "myzone.com" -ResourceGroupName "rgname" | Add-AzDnsRecordConfig -Cname $newcname | Set-AzDnsRecordSet

SAMPLE OUTPUT:- enter image description here

enter image description here

user_159691650

Climbing on AjayKumarGhose-MT shoulders (mention of -Cname $rs.Records.cname) , I did found the solution I needed to use

$rs.Records[0].cname = "new-test-v1.com"

instead of

$rs.Records[0].Records = "new-test-v1.com"

Full solution is then :

$rs = Get-AzDnsRecordSet -name "test1" -RecordType CNAME -ZoneName "zone.io" -ResourceGroupName "dns"
$rs.Records[0].Records = "new-test-v1.com"
Set-AzDnsRecordSet -RecordSet $rs
user_82836270
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