[Bug 1832757] Re: Update ubuntu-advantage-client

[Andreas Hasenack]

** Description changed:

  [Impact]
  This is a major rewrite of ubuntu-advantage-client. This version introduces an updated command line interface (UA Client) to simplify some interaction with Ubuntu Advantage support offerings, and interacts with a new service backend built specifically for this new streamlined experience.
  
  Disco and Eoan already have this new version (but slightly older), but
  trusty, xenial, bionic and cosmic do not. This update is for trusty only
  at the moment, because the other LTSs and later releases have other
  services available under the UA umbrella which haven't yet been fully
  converted to the new backend.
  
  [Test Case]
  There are free services available for Trusty and anyone with an ubuntu one account can try them out with the new client.
  
  You can sign up interactively by just typing:
  
  sudo ua attach
  
  That will prompt you for your ubuntu one login credentials, and 2FA if
  needed, and enable ESM and Livepatch (the latter if running an HWE
  kernel).
  
  Alternatively, you can go to https://auth.contracts.canonical.com/,
  obtain a token, and attach your machine with:
  
  sudo ua attach <token>
  
  [Regression Potential]
- 
-  * discussion of how regressions are most likely to manifest as a result
- of this change.
- 
-  * It is assumed that any SRU candidate patch is well-tested before
-    upload and has a low overall risk of regression, but it's important
-    to make the effort to think about what ''could'' happen in the
-    event of a regression.
- 
-  * This both shows the SRU team that the risks have been considered,
-    and provides guidance to testers in regression-testing the SRU.
+ This is a major rewrite from bash to python3 and there are changes in behavior.
+ - new services will be listed, but not avaialble for trusty, only for later LTSs
+ - even when ESM is not enabled, an apt hook will advertise the availability of updates in that repository. This hook has failed in the past while this package was in disco, and that failed the apt transaction. This has of course been fixed since then (see #1824523 and #1824523).
  
  [Other Info]
- 
-  * Anything else you think is useful to include
-  * Anticipate questions from users, SRU, +1 maintenance, security teams and the Technical Board
-  * and address these questions in advance

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https://bugs.launchpad.net/bugs/1832757

Title:
  Update ubuntu-advantage-client

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