Automating configuration of SQL Server 2017 Reporting Services - powershell

Question

I am trying to silently install and configure SQL Server 2017 Reporting Services. The silent install is straightforward, and I have most of the configuration done, using the PowerShell script below.
Where I run into an issue is when attempting to set the virtual directory for the Report Manager. I receive an error on the following line
$configset.SetVirtualDirectory("ReportManager", "Reports", 1033)
HRESULT -2147220938: The application is not found.
Per How to automate SSRS install and configuration, it appears I am performing the steps in the correct order.
$configset = Get-WmiObject –namespace "root\Microsoft\SqlServer\ReportServer\RS_SSRS\v14\Admin" `
-class MSReportServer_ConfigurationSetting -ComputerName localhost
$configset
If (! $configset.IsInitialized)
{
[string]$dbscript = $configset.GenerateDatabaseCreationScript("ReportServer", 1033, $false).Script
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Force
Import-Module sqlps -DisableNameChecking | Out-Null
$conn = New-Object Microsoft.SqlServer.Management.Common.ServerConnection -ArgumentList $env:ComputerName
$conn.ApplicationName = "Script"
$conn.StatementTimeout = 0
$conn.Connect()
$smo = New-Object Microsoft.SqlServer.Management.Smo.Server -ArgumentList $conn
# Create the ReportServer and ReportServerTempDB databases
$db = $smo.Databases["master"]
$db.ExecuteNonQuery($dbscript)
# Set permissions for the databases
$dbscript = $configset.GenerateDatabaseRightsScript($configset.WindowsServiceIdentityConfigured, "ReportServer", $false, $true).Script
$db.ExecuteNonQuery($dbscript)
# Set the database connection info
$configset.SetDatabaseConnection("(local)", "ReportServer", 2, "", "")
$configset.SetVirtualDirectory("ReportServerWebService", "ReportServer", 1033)
$configset.ReserveURL("ReportServerWebService", "http://+:80", 1033)
$configset.SetVirtualDirectory("ReportManager", "Reports", 1033)
$configset.ReserveURL("ReportManager", "http://+:80", 1033)
$configset.InitializeReportServer($configset.InstallationID)
$configset.IsReportManagerEnabled
$configset.IsInitialized
$configset.IsWebServiceEnabled
$configset.IsWindowsServiceEnabled
$configset.ListReportServersInDatabase()
$configset.ListReservedUrls();
$inst = Get-WmiObject –namespace "root\Microsoft\SqlServer\ReportServer\RS_SSRS\v14" `
-class MSReportServer_Instance -ComputerName localhost
$inst.GetReportServerUrls()
}
Any insights into this issue are appreciated!

Answer 1

The issue was the with SQL Server 2016 (and later), the name of the web application for the report manager has changed from ReportManager to ReportServerWebApp.

Answer 2

You could use DSC this link should have information on how to use the dsc resources:
https://learn.microsoft.com/en-us/sql/database-engine/install-windows/install-sql-server-on-server-core
When this code was Xrev I was able to install and configure SSRS using a resource at that time called MSFT_xSQLServerSetup.
Here is an example of setting up a single sql server. https://github.com/PowerShell/SqlServerDsc/blob/master/Examples/SQL-Standalone.ps1