How to set the ComputeModel property to Serverless on an Azure SQL Database using PowerShell? - azure

Question

I'm restoring an Azure SQL Database (Serverless) from a deleted database backup using Get-AzSqlDeletedDatabaseBackup and Restore-AzSqlDatabase PowerShell commandlets. The restore works, but the tags and ComputeModel are not restored with the database.
I've tried using Set-AzSqlDatabase:
Set-AzSqlDatabase -ResourceGroupName $resourcegroupname -DatabaseName $databasename -ServerName $servername -ComputeModel "Serverless" -AutoPauseDelayInMinutes 45
Update: I tried the following code and the Kind is set prior to using the Set-AzResource cmdlet, but it doesn't stick
$resource = Get-AzResource -ResourceGroupName $resourcegroupname -ResourceType "Microsoft.Sql/servers/databases" -Name "$servername/$databasename"
Write-Host "Setting ComputeModel to Serverless..."
$resource.Kind = "v12.0,user,vcore,serverless"
$resource
# resource.Kind is successfully set on the $resource object
Write-Host "Set-AzResource..."
$resource | Set-AzResource -Force
Anyone have any ideas?
Thank you.
Cheers,
Andy

Answer 1

The Get-AzSqlDeletedDatabaseBackup and Restore-AzSqlDatabase PowerShell cmdlets are doesn't contain a property to get the ComputeModel.
While Restore and Delete Backup database we don't require the ComputeModel properties. while setting database we need to require the ComputeModel.
If you want to get the compute model for the Azure SQL Database you can use, Get-AzResource command to fetch the specific information.
Thanks #joy wang SO Solution we can get the serverless Azure SQL Database.

Answer 2

Thanks to #holger and #Delliganesh Sevanesan for the help, I was able implement a solution that restores the most recent deleted database (SQL Database), adds some resource tags, and sets the ComputeModel to serverless.
Here's the code:
<#
Purpose: Restore the most recently deleted Azure Sql Database
Dependencies:
Az.Sql PowerShell module
#>
# Set variables first
$resourcegroupname = 'myresourcegroup'
$servername = 'myservername'
$databasename = 'mydatabasename'
[hashtable]$tags = #{
application = "testing"
}
try {
$deleteddatabases = Get-AzSqlDeletedDatabaseBackup -ResourceGroupName $resourcegroupname -ServerName $servername -DatabaseName $databasename
} catch {
Write-Error "Error getting database backups [Get-AzSqlDeletedDatabaseBackup]: " + $_.Exception.Message
exit(1)
}
# Get most recent backup in case there are multiple copies
# Assumes index and order in foreach is the same - proven in test
Write-Host "Database backups:"
$index = 0
$MostRecentBackupIndex = 0
$MostRecentBackupDate = (Get-date).AddDays(-2) # initialize variable with date from two days ago
foreach ($db in $deleteddatabases) {
if ($db.CreationDate -ge $MostRecentBackupDate) {
$MostRecentBackupIndex = $index
$MostRecentBackupDate = $db.CreationDate
Write-Host "Most Recent Database: $($db.DatabaseName) : Created: $($db.CreationDate) : DeleteDate: $($db.DeletionDate)"
}
$index++
}
$deleteddatabase = $deleteddatabases[$MostRecentBackupIndex]
Write-Host "----------------------------------------------------------------------------------"
Write-Host "Restoring: $($deleteddatabase.DatabaseName) from: $($deleteddatabase.CreationDate) backup"
Write-Host "----------------------------------------------------------------------------------"
Write-Host "Deleted database info ResourceId: "
Write-Host $deleteddatabase.ResourceId
try {
Restore-AzSqlDatabase -FromDeletedDatabaseBackup `
-DeletionDate $deleteddatabase.DeletionDate `
-ResourceGroupName $resourcegroupname `
-ServerName $servername `
-TargetDatabaseName $databasename `
-ResourceId $deleteddatabase.ResourceID `
-Edition $deleteddatabase.Edition `
-Vcore 2 `
-ComputeGeneration "Gen5"
} catch {
Write-Error "Error restoring database [Restore-AzSqlDatabase]: " + $_.Exception.Message
exit(1)
}
# Wait a few minutes to allow restore to complete before applying the tags
Start-Sleep -Seconds 180
Write-Host "Applying tags to database..."
try {
$resource = Get-AzResource -ResourceGroupName $resourcegroupname -ResourceType "Microsoft.Sql/servers/databases" -Name "$servername/$databasename"
New-AzTag -ResourceId $resource.Id -Tag $tags
} catch {
Write-Error "Error adding tags to database [Get-AzResource, New-AzTag]: " + $_.Exception.Message
exit(1)
}
Write-Host "Setting ComputeModel to Serverless..."
try {
# Important - must include -AutoPauseDelayInMinutes 60, -MinVcore, and MaxVcore parameters (thanks holger)
Set-AzSqlDatabase -ResourceGroupName $resourcegroupname -DatabaseName $databasename -ServerName $servername -ComputeModel Serverless -AutoPauseDelayInMinutes 60 -MinVcore 1 -MaxVcore 2
} catch {
Write-Error "Error setting serverless mode [Set-AzSqlDatabase]: " + $_.Exception.Message
exit(1)
}
Write-Host "Database restore complete."