Citrix App Layering

What’s new in App Layering 2005

The App Layering 2005 release includes support for the following features and enhancements:

  • Security enhancements: Security enhancements include cipher suite updates, third-party component upgrades, and runtime environment upgrades.

  • Secure boot support: Guest drivers are certified via Microsoft’s WHQL program. You can use certified guest drivers in secure boot configurations. (UNI-74917)

  • Customer user layer path: User layer files can now be stored in network shares whose locations are specified using custom paths. The custom paths can include environment variables. (UNI-78291)

  • Applications with services in user layer: When an application installed in a user layer contains Windows services, such as Google Chrome, those services are started as expected when the user logs in. (UNI-77660)

  • 2005 upgrade package: The App Layering 2005 upgrade package is large enough that older appliances cannot download it automatically. If you are running version 1911 or older, download the package manually from the downloads site. Also, we recommend running the upgrade from a management console in Secure HTTP (HTTPS). If you upgrade while in HTTP, messages do not display in the browser. If that happens, refresh the browser after 20 minutes. (Refreshing won’t cause issues in spite of the message that says not to refresh.) If the upgrade is still running, you get a “service unavailable error.” You can ignore that message and keep refreshing the browser every few minutes until the login page appears.

Labs features in this release

Labs features are previews of potential functionality in future releases. While a feature is in Labs, do not use it in production. There is no guarantee that a Labs feature remains in the product. When released, the feature can work differently.

The Labs features available in this release include the following:

  • You can assign app layers as elastic layers on images that use a different OS layer: Until now, Elastic layer assignments required that the App layer assigned use the same OS layer that was used to create the App layer. Now you can try assigning an App layer as an Elastic layer on a layered image that uses a different OS layer.

    Important:

    Running an elastic layer on a different OS layer than the one used to create it can have issues.

To use a Labs feature, you need to enable the feature first.

Supported platforms

For information about platforms supported by Citrix App Layering, see System requirements.

Upgrade path and considerations

For the latest fixes and features, including compatibility with other software packages that you use, we encourage you to stay current with the App Layering upgrades.

Partially automated upgrades

The App Layering upgrade process is partially automated. The appliance periodically checks for upgrades and downloads the latest package, verifies it, and extracts the files. Users receive a message the next time they log in, and admistrators with proper permisisons can start the upgrade. (Other users can select Remind Me Later to turn off the message.)

The 2005 upgrade package is large enough that older appliances cannot download it automatically. If you are running version 1911 or older, download the package manually from the downloads site. Also, we recommend running the upgrade from a management console in Secure HTTP (HTTPS). If you upgrade while in HTTP, messages do not display in the browser. If that happens, refresh the browser after 20 minutes. (Refreshing won’t cause issues in spite of the message that says not to refresh.) If the upgrade is still running, you get a “service unavailable error.” It is safe to ignore the message and keep refreshing the browser every few minutes until the login page appears.

If you are on a pre-19.1 version of App Layering, see the Upgrade article for the correct upgrade path.

Components that require upgrading

App Layering upgrades include the appliance upgrade, and an agent upgrade for hypervisor and provisioning servers where you have installed the agent. Also expect to republish images to get the latest upgrades on those images.

Be sure to refer to the Upgrade article for details about upgrading from the specific version that you currently have to the lastest one!

What’s new in App Layering 2005