Comment 0 for bug 1929038

As part of our entreprise desktop offering, there is the request to backport ADSys to 20.04 LTS.
The package is in universe for now.

ADSys is our Active Directory GPO integration. It’s available starting Ubuntu 21.04.

[Impact]

 * ADSys is a new package. Impacts is thus only for people installing.
 * It depends on a recent Golang (1.16). We thus needs to backport this package from Ubuntu 21.04/21.10 (1.16.2-0ubuntu1 at the time of this writing) by introducing a versioned separate package (each Go version is a separate package already in the distribution). It is similar to what has been done for snaps in previous LTS.
 * This is a entreprise feature requested by desktop customers running LTS.

[Test Plan for Golang 1.16]

 * Ensure Golang 1.16 is published in -proposed
 * Start a build with a package, requiring Golang 1.16 (dependency + PATH set to Golang 1.16 go binary).
 * Ensure the package builds successfully.
 * Run go version <your binary> which should display: "go1.16.x" (x being the version uploaded).

[Test Plan for ADSys]

 * Configure your machine with AD, with a correctly configured SSSD and KRB5 (AD user should be able to log in). Instructions can be found on https://github.com/ubuntu/adsys/wiki/2.-Prerequisites
 * Install admx and adml files on your AD controller: https://github.com/ubuntu/adsys/wiki/3.-AD-Setup
 * Configure some values in AD (https://github.com/ubuntu/adsys/wiki/4.-Using-GPO), for instance:
  * GDM login screen background
  * User favorites apps
 * Install ADSys, reboot the machine and login in as an AD user
 * Ensure both GDM background and user favorites apps follows what you set in AD

[Where problems could occur]

For Go 1.16:

 * Package depending on this Go version would not be able to compile.
 * As this is a separate, versionned, new package, no impact on existing ones.
 * FYI, we already built ADSys against this Go version in our ppa: https://launchpad.net/~didrocks/+archive/ubuntu/adsys

For ADSys:

 * Machine will fail booting if ADSys can’t connect to AD on first boot.
 * AD User will fail logging if ADSys can’t connect to AD on first boot.
 * As this is a separate, versionned, new package, no impact on existing installations.

[Other Info]

 * ADSys (built against Go 1.16 in the same PPA) is battle-tested from our PPA.
 * We will first upload Go 1.16 and let it migrate before uploading ADSys itself.