** Description changed:

  [Impact]
  It is good practice to remove unneeded packages/software from a machine. On 
the shell, this can be achieved by using "apt autoremove". There is no way to 
do it via landscape.
  
  The lack of this option can lead to a full /boot partitions, for
  example, by accumulating kernel packages that are no longer used.
  
  The fix in Landscape is a new checkbox option in the existing auto-
  upgrade profile feature. If checked, whenever an auto-upgrade profile is
  applied to a computer, meaning, upgrades will be done, the client will
  also do the equivalent of "apt autoremove", thus removing packages that
  are no longer used.
  
  The caveat is that, at the time of this writing, the server portion of
  this feature is not yet available, so it can only be tested with a trunk
  deployment of the server component.
  
  [Test Case]
  
  * get a test account on staging.landscape.canonical.com. That deployment
  has autoremove support. You may email the address in the #landscape
  topic in the internal canonical irc channel to request such an account.
  
  * Login to https://staging.landscape.canonical.com and create an
  autoupgrade profile, configure it to apply to computers with the tag
  "autoupgraderemove", and make sure to tick the "autoremove packages"
  option. Also configure it to apply to all days of the week (or at least
  "today") and at every hour at XX minutes. You will change XX later.
  
  * create an ubuntu VM or LXD (easier) running the release you are
  testing. On it, make sure there are upgrades available. Do not upgrade
  the packages. If there are no available upgrades (i.e., the image you
  picked to deploy this VM or LXD was up-to-date), inspect packages you
  have installed with apt-cache policy and try to downgrade some. You need
  at least one upgrade available.
  
  * install devscripts, and then remove it:
    - sudo apt install devscripts
    - sudo apt purge devscripts
- That should trigger a lot of autoremovable possibilities. Confirm by running 
(but not proceeding) "apt autoremove"
+ That should trigger a lot of autoremovable possibilities. Confirm by running 
(but not proceeding with) "apt autoremove"
  
  * install landscape-client from proposed and register it against staging. 
Something like:
- sudo landscape-config --silent -a <your-account-name> -t "test-sru-1208393" 
--script-users ALL --include-manager-plugins ScriptExecution -u 
https://staging.landscape.canonical.com/message-system --ping-url 
http://staging.landscape.canonical.com/ping
+ sudo landscape-config --silent -a <your-account-name> -t test-sru-1208393 
--script-users ALL --include-manager-plugins ScriptExecution -u 
https://staging.landscape.canonical.com/message-system --ping-url 
http://staging.landscape.canonical.com/ping
  
  * go to the staging.landscape.canonical.com pending computers page and
  accept this computer
  
- * go to the packages page and wait for this computer to report all
- packages and available upgrades. This could take about 15min
+ * select the computer, go to the packages page and wait for this
+ computer to report all packages and available upgrades. This could take
+ about 15min or even more on artful because staging does not have a hash-
+ id cache for artful.
  
- * keep tailing -f /var/log/landscape/package-reporter.log and look for the 
message where it says it's reporting autoremovable packages:
+ * keep tailing -f /var/log/landscape/package-reporter.log on the client and 
look for multiple messages where it says it's reporting autoremovable packages. 
Here is one example:
  2017-11-13 13:49:22,220 INFO     [MainThread] Queuing message with changes in 
known packages: 421 installed, 62279 available, 44 available upgrades, 0 
locked, 1 autoremovable, 0 not installed, 0 not available, 0 not available 
upgrades, 0 not locked, 0 not autoremovable.
  
  * That confirms the client is reporting the autoremovable packages.
  
- * On the server, add the tag "autoupgraderemove" to this registered
- computer.
+ * Once all packages have been reported to the server (no more "changes
+ in known packages on the client log), on the server, add the tag
+ "autoupgraderemove" to this registered computer.
  
  * Edit the autoupgrade profile you created before and make sure it is
  configured to kick in in the next 5 minutes. Change its configuration if
  needed.
  
  * Wait 5-10min. You should eventually see an activity that will upgrade
  packages on this computer, as well as autoremove others.
  
  * Once the activity is finished, confirm that "apt autoremove" on the
  computer no longer has packages to remove.
  
  [Regression Potential]
  This feature relies on "apt autoremove" working correctly and not doing silly 
things, like removing your running kernel, or bash, or something else that's 
essential.
  
+ It's an opt-in feature, so it won't affect people who do not enable it
+ in the auto-upgrade profiles.
+ 
  [Other Info]
+ This is technically a new feature, but it has been one of the most requested 
ones.
  
-  * 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
+ As of the time of this writing, there is no public landscape server
+ (apart from staging) which has support for this feature. But it's good
+ to have the client out there for when the server is upgraded.
+ 
+ A new client talking to an old server won't cause problems. The server
+ will simply discard the extra autoremovable package list.
+ 
  
  --- Original Description below ---
  
  Canonical IS have moved software updates almost entirely to Landscape.
  
  Apart from updating software packages, it is also good practice to
  remove unneeded software.
  
  On the shell, this can be achieved using "apt-get autoremove"
  
  It would be desirable to have this functionality available in Landscape.

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https://bugs.launchpad.net/bugs/1208393

Title:
  add autoremove to Landscape

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