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App Service on Azure Stack Hub 2302 release notes

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These release notes describe the improvements and fixes in Azure App Service on Azure Stack Hub 2302, and any known issues. Known issues are divided into issues directly related to the deployment, update process, and issues with the build (post-installation).

Important

Update Azure Stack Hub to a supported version (or deploy the latest Azure Stack Development Kit) if necessary, before deploying or updating the App Service resource provider (RP). Be sure to read the RP release notes to learn about new functionality, fixes, and any known issues that could affect your deployment.

Supported Minimum Azure Stack Hub version App Service RP version
2301 and newer 2302 Installer (release notes)

Build reference

The App Service on Azure Stack Hub 2302 build number is 98.0.1.703

What's new?

Azure App Service on Azure Stack Hub 2302 release replaces the 2022 H1 release and includes fixes for the following issues:

Prerequisites

Refer to the Before You Get Started documentation before beginning deployment.

Before you begin the upgrade of Azure App Service on Azure Stack Hub to 2302:

  • Ensure your Azure Stack Hub is updated to 1.2108.2.127 or 1.2206.2.52.

  • Ensure all roles are ready in the Azure App Service administration in the Azure Stack Hub admin portal.

  • Back up App Service secrets using the App Service administration in the Azure Stack Hub admin portal.

  • Back up the App Service and SQL Server master databases:

    • AppService_Hosting;
    • AppService_Metering;
    • Master

  • Back up the tenant app content file share.

    Important

    Cloud operators are responsible for the maintenance and operation of the file server and SQL Server. The resource provider does not manage these resources. The cloud operator is responsible for backing up the App Service databases and tenant content file share.

  • Syndicate the Custom Script Extension version 1.9.3 from the Marketplace.

Pre-update steps

Note

If you have previously deployed Azure App Service on Azure Stack Hub 2022 H1 to your Azure Stack Hub stamp, this release is a minor upgrade to 2022 H1 which addresses two issues.

Azure App Service on Azure Stack Hub 2302 is a significant update that will take multiple hours to complete. The whole deployment will be updated and all roles recreated with the Windows Server 2022 Datacenter OS. Therefore, we recommend informing end customers of a planned update before applying the update.

  • As of the Azure App Service on Azure Stack Hub 2022 H1 update, the letter K is now a reserved SKU letter. If you have a custom SKU defined that uses the letter K, contact support to assist with resolving this situation prior to upgrade.

Review the known issues for update and take any actions prescribed.

Post-deployment steps

Important

If you have provided the App Service resource provider with a SQL Always On instance, you must add the appservice_hosting and appservice_metering databases to an availability group and synchronize the databases to prevent any loss of service in the event of a database failover.

Known issues (update)

  • In situations where you have converted the appservice_hosting and appservice_metering databases to contained databases, the upgrade may fail if logins haven't been successfully migrated to contained users.

    If you converted the appservice_hosting and appservice_metering databases to contained database post deployment, and haven't successfully migrated the database logins to contained users, you might experience upgrade failures.

    You must execute the following script against the SQL Server hosting appservice_hosting and appservice_metering before upgrading your Azure App Service on Azure Stack Hub installation to 2020 Q3. This script is non-destructive and will not cause downtime.

    This script must be run under the following conditions:

    • By a user that has the system administrator privilege, for example the SQL SA Account.
    • If using SQL Always on, ensure the script is run from the SQL instance that contains all App Service logins in the form:
      • appservice_hosting_FileServer
      • appservice_hosting_HostingAdmin
      • appservice_hosting_LoadBalancer
      • appservice_hosting_Operations
      • appservice_hosting_Publisher
      • appservice_hosting_SecurePublisher
      • appservice_hosting_WebWorkerManager
      • appservice_metering_Common
      • appservice_metering_Operations
      • All WebWorker logins - which are in the form WebWorker_<instance ip address>
          USE appservice_hosting
      IF EXISTS(SELECT * FROM sys.databases WHERE Name=DB_NAME() AND containment = 1)
      BEGIN
      DECLARE @username sysname ;  
      DECLARE user_cursor CURSOR  
      FOR
          SELECT dp.name
          FROM sys.database_principals AS dp  
          JOIN sys.server_principals AS sp
              ON dp.sid = sp.sid  
              WHERE dp.authentication_type = 1 AND dp.name NOT IN ('dbo','sys','guest','INFORMATION_SCHEMA');
          OPEN user_cursor  
          FETCH NEXT FROM user_cursor INTO @username  
              WHILE @@FETCH_STATUS = 0  
              BEGIN  
                  EXECUTE sp_migrate_user_to_contained
                  @username = @username,  
                  @rename = N'copy_login_name',  
                  @disablelogin = N'do_not_disable_login';  
              FETCH NEXT FROM user_cursor INTO @username  
          END  
          CLOSE user_cursor ;  
          DEALLOCATE user_cursor ;
          END
      GO

      USE appservice_metering
      IF EXISTS(SELECT * FROM sys.databases WHERE Name=DB_NAME() AND containment = 1)
      BEGIN
      DECLARE @username sysname ;  
      DECLARE user_cursor CURSOR  
      FOR
          SELECT dp.name
          FROM sys.database_principals AS dp  
          JOIN sys.server_principals AS sp
              ON dp.sid = sp.sid  
              WHERE dp.authentication_type = 1 AND dp.name NOT IN ('dbo','sys','guest','INFORMATION_SCHEMA');
          OPEN user_cursor  
          FETCH NEXT FROM user_cursor INTO @username  
              WHILE @@FETCH_STATUS = 0  
              BEGIN  
                  EXECUTE sp_migrate_user_to_contained
                  @username = @username,  
                  @rename = N'copy_login_name',  
                  @disablelogin = N'do_not_disable_login';  
              FETCH NEXT FROM user_cursor INTO @username  
          END  
          CLOSE user_cursor ;  
          DEALLOCATE user_cursor ;
          END
      GO

  • Tenant Applications are unable to bind certificates to applications after upgrade.

    The cause of this issue is due to a missing feature on front-ends after the upgrade to Windows Server 2022. Operators must follow this procedure to resolve the issue.

    1. In the Azure Stack Hub admin portal, navigate to Network Security Groups and view the ControllersNSG Network Security Group.

    2. By default, remote desktop is disabled to all App Service infrastructure roles. Modify the Inbound_Rdp_3389 rule action to Allow access.

    3. Navigate to the resource group containing the App Service Resource Provider deployment, by default the name is AppService.<region> and connect to CN0-VM.

    4. Return to the CN0-VM remote desktop session.

    5. In an administrator PowerShell session run:

      Important

      During the execution of this script there will be a pause for each instance in the front end scaleset. If there is a message indicating the feature is being installed, that instance will be rebooted. Use the pause in the script to maintain front end availability. Operators must ensure at least one front end instance is "Ready" at all times to ensure tenant applications can receive traffic and not experience downtime.

      $c = Get-AppServiceConfig -Type Credential -CredentialName FrontEndCredential
$spwd = ConvertTo-SecureString -String $c.Password -AsPlainText -Force
$cred = New-Object System.Management.Automation.PsCredential ($c.UserName, $spwd)

Get-AppServiceServer -ServerType LoadBalancer | ForEach-Object {
    $lb = $_
    $session = New-PSSession -ComputerName $lb.Name -Credential $cred

    Invoke-Command -Session $session {
      $f = Get-WindowsFeature -Name Web-CertProvider
      if (-not $f.Installed) {
          Write-Host Install feature on $env:COMPUTERNAME
          Install-WindowsFeature -Name Web-CertProvider

          Shutdown /t 5 /r /f 
      }
   }
}

Remove-PSSession -Session $session

Read-Host -Prompt "If installing the feature, the machine will reboot. Wait until there's enough frontend availability, then press ENTER to continue"

    6. In the Azure Stack admin portal, navigate back to the ControllersNSG Network Security Group.

    7. Modify the Inbound_Rdp_3389 rule to deny access.

Known issues (post-installation)

  • Workers are unable to reach the file server when App Service is deployed in an existing virtual network and the file server is only available on the private network, as called out in the Azure App Service on Azure Stack deployment documentation.

    If you chose to deploy into an existing virtual network and an internal IP address to connect to your file server, you must add an outbound security rule, enabling SMB traffic between the worker subnet and the file server. Go to the WorkersNsg in the admin portal and add an outbound security rule with the following properties:

    • Source: Any
    • Source port range: *
    • Destination: IP Addresses
    • Destination IP address range: Range of IPs for your file server
    • Destination port range: 445
    • Protocol: TCP
    • Action: Allow
    • Priority: 700
    • Name: Outbound_Allow_SMB445

  • To remove latency when workers are communicating with the file server, we also advise adding the following rule to the Worker NSG to allow outbound LDAP and Kerberos traffic to your Active Directory controllers if securing the file server using Active Directory; for example, if you've used the Quickstart template to deploy a HA file server and SQL Server.

    Go to the WorkersNsg in the admin portal and add an outbound security rule with the following properties:

    • Source: Any
    • Source port range: *
    • Destination: IP Addresses
    • Destination IP address range: Range of IPs for your AD Servers, for example with the Quickstart template 10.0.0.100, 10.0.0.101
    • Destination port range: 389,88
    • Protocol: Any
    • Action: Allow
    • Priority: 710
    • Name: Outbound_Allow_LDAP_and_Kerberos_to_Domain_Controllers

  • Tenant applications are unable to bind certificates to applications after upgrade.

    The cause of this issue is due to a missing feature on front ends after the upgrade to Windows Server 2022. Operators must follow this procedure to resolve the issue:

    1. In the Azure Stack Hub admin portal, navigate to Network Security Groups and view the ControllersNSG Network Security Group.

    2. By default, remote desktop is disabled to all App Service infrastructure roles. Modify the Inbound_Rdp_3389 rule action to Allow access.

    3. Navigate to the resource group containing the App Service Resource Provider deployment, by default the name is AppService.<region> and connect to CN0-VM.

    4. Return to the CN0-VM remote desktop session.

    5. In an administrator PowerShell session run:

      Important

      During the execution of this script there will be a pause for each instance in the front end scaleset. If there is a message indicating the feature is being installed, that instance will be rebooted. Use the pause in the script to maintain front end availability. Operators must ensure at least one front end instance is "Ready" at all times to ensure tenant applications can receive traffic and not experience downtime.

      $c = Get-AppServiceConfig -Type Credential -CredentialName FrontEndCredential
$spwd = ConvertTo-SecureString -String $c.Password -AsPlainText -Force
$cred = New-Object System.Management.Automation.PsCredential ($c.UserName, $spwd)

Get-AppServiceServer -ServerType LoadBalancer | ForEach-Object {
    $lb = $_
    $session = New-PSSession -ComputerName $lb.Name -Credential $cred

    Invoke-Command -Session $session {
      $f = Get-WindowsFeature -Name Web-CertProvider
      if (-not $f.Installed) {
          Write-Host Install feature on $env:COMPUTERNAME
          Install-WindowsFeature -Name Web-CertProvider

          Read-Host -Prompt "If installing the feature, the machine will reboot. Wait until there's enough frontend availability, then press ENTER to continue"
          Shutdown /t 5 /r /f 
      }
   }
}

Remove-PSSession -Session $session

    6. In the Azure Stack admin portal, navigate back to the ControllersNSG Network Security Group.

    7. Modify the Inbound_Rdp_3389 rule to deny access.

Known issues for Cloud Admins operating Azure App Service on Azure Stack

  • Custom domains aren't supported in disconnected environments.

    App Service performs domain ownership verification against public DNS endpoints. As a result, custom domains aren't supported in disconnected scenarios.

  • Virtual Network integration for Web and Function apps is not supported.

    The ability to add virtual network integration to Web and Function apps shows in the Azure Stack Hub portal and if a tenant attempts to configure, they receive an internal server error. This feature is not supported in Azure App Service on Azure Stack Hub.

Next steps