How to automatically revalidate custom domain mapped to SWA

Question

How can I automatically revalidate custom domain mapped to a Static Web App instead of creating a TXT record manually every 6 months? or revalidation of custom domain is done manually?

Answer 1

Hi @alabitosin58@gmail.com ,
welcome to the Microsoft Q&A Platform!
To automatically revalidate a custom domain mapped to an Azure Static Web App (SWA), you can use Azure DNS and script-based automation to periodically update the TXT record for domain ownership verification:

1. Automated Revalidation with Azure DNS:

• If you manage your DNS with Azure DNS: You can use Azure CLI or PowerShell scripts to automate the re-addition of the TXT record before it expires.
• Create a script that runs periodically (such as every 5-6 months) to check if the revalidation is due.
• Use Azure CLI or Azure PowerShell within the script to update or add the TXT record required for validation.
• Deploy this script in an Azure Function or Azure Logic App to ensure it runs automatically at the desired interval.
• Here’s a simplified example of a PowerShell script to add or update a TXT record in Azure DNS:

    $resourceGroupName = "YourResourceGroup"
    $zoneName = "yourdomain.com"
    $recordSetName = "_dnsauth.swa"
    $txtValue = "YourVerificationToken"
    # Authenticate with Azure
    Connect-AzAccount
    # Add or update the TXT record in Azure DNS
    New-AzDnsRecordSet -Name $recordSetName -RecordType TXT -ZoneName $zoneName -ResourceGroupName $resourceGroupName -Ttl 3600 -DnsRecords (New-AzDnsRecordConfig -Value $txtValue) -Force