Can't execute scripts on a landscape-client that has non-ascii character in its tag

[Gabriel Ramirez]

[Impact]

 * Script execution fails on computers with non-ascii tags

 * This is a fairly simple bugfix which is easy to trigger

[Test Case]

 * Unset locale (/etc/default/locale)

 * Tagging a client with accented characters and running a simple
   "echo script" should be enough to validate the encoding correction.

[Regression Potential]

 * The tag encoding change for scripts is trivial for recent clients.
   It affects only code related to running shell script and, assuming bad
   system encoding, should still work the same for ASCII tags.

 * However, the nature of python2.7 handling of encoding for trusty
   and xenial is different enough for this patch not to be included
   for them, thus avoiding regressions on those clients.

[Original Description]

Steps to reproduce:

1) Add tag to a landscape-client, ex assgn tag 'täg
2) Go to scripts in the GUI page and attempt to execute script on that client
3) Script will attempt to run on client and will fail, GUI will show below error:

[Failure instance: Traceback: <type 'exceptions.TypeError'>: Environment contains a non-string value
/usr/lib/python2.7/dist-packages/landscape/manager/scriptexecution.py:176:_handle_execute_script
/usr/lib/python2.7/dist-packages/landscape/manager/scriptexecution.py:292:run_script
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:306:addCallback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:295:addCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:577:_runCallbacks
/usr/lib/python2.7/dist-packages/landscape/manager/scriptexecution.py:290:prepare_script
/usr/lib/python2.7/dist-packages/landscape/manager/scriptexecution.py:129:_run_script
/usr/lib/python2.7/dist-packages/twisted/internet/posixbase.py:336:spawnProcess
/usr/lib/python2.7/dist-packages/twisted/internet/base.py:923:_checkProcessArgs
]

Above exception is generated by the client w/ LANDSCAPE_COMPUTER_TAGS value being None

[Simon Poirier (simpoir)]

Easily reproduced by setting accented tags (e.g. éàµ) on a fresh computer. This also appears to affect xenial.

[Dave Jones (waveform)]

Fix pushed as PR #51 https://github.com/CanonicalLtd/landscape-client/pull/51

[Andreas Hasenack (ahasenack)]

Fix released in disco.

[Timo Aaltonen (tjaalton)]

An upload of landscape-client to cosmic-proposed has been rejected from the upload queue for the following reason: "Includes a change without an SRU bug attached to it".

[Timo Aaltonen (tjaalton)]

An upload of landscape-client to bionic-proposed has been rejected from the upload queue for the following reason: "Includes a change without an SRU bug attached to it".

[Timo Aaltonen (tjaalton)]

Hello Gabriel, or anyone else affected,

Accepted landscape-client into cosmic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/landscape-client/18.01-0ubuntu4.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-cosmic to verification-done-cosmic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-cosmic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Timo Aaltonen (tjaalton)]

Hello Gabriel, or anyone else affected,

Accepted landscape-client into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/landscape-client/18.01-0ubuntu3.2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Simon Poirier (simpoir)]

I tested landscape-client and landscape-common for both bionic-proposed and cosmic-proposed.
Then I reset the locale config, enabled script execution, set some fancy unicode tags and ran a script successfully.

The script ran successfully on both bionic and cosmic, as can be seen here https://screenshots.firefox.com/oiRDpc3KehjKjG3g/landscape.canonical.com

[Launchpad Janitor (janitor)]

This bug was fixed in the package landscape-client - 18.01-0ubuntu4.1

---------------
landscape-client (18.01-0ubuntu4.1) cosmic; urgency=medium

  * debian/patches/nutanix-kvm.patch: Update vm_info.py to include Nutanix
    hypervisor. (LP: #1788219)
  * Fixes for release-upgrade:
    - debian/patches/release-upgrade-success.patch: Enable landscape-client to
      survive trusty upgrade. (LP: #1670291)
    - debian/patches/post-upgrade-reboot.patch: Force reboot operation in
      case systemd fails. (LP: #1670291)
  * debian/patches/unicode-tags-script.patch: Permit environments
    containing unicode chars for script execution. (LP: #1765518)
  * debian/patches/1616116-resync-loop.patch:
    Clear hash id database on package resync. (LP: #1616116)

 -- Simon Poirier <email address hidden> Tue, 27 Nov 2018 09:24:22 -0500

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for landscape-client has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package landscape-client - 18.01-0ubuntu3.2

---------------
landscape-client (18.01-0ubuntu3.2) bionic; urgency=medium

  * debian/patches/nutanix-kvm.patch: Update vm_info.py to include Nutanix
    hypervisor. (LP: #1788219)
  * Fixes for release-upgrade:
    - debian/patches/release-upgrade-success.patch: Enable landscape-client to
      survive trusty upgrade. (LP: #1670291)
    - debian/patches/post-upgrade-reboot.patch: Force reboot operation in
      case systemd fails. (LP: #1670291)
  * debian/patches/unicode-tags-script.patch: Permit environments
    containing unicode chars for script execution. (LP: #1765518)
  * debian/patches/1616116-resync-loop.patch:
    Clear hash id database on package resync. (LP: #1616116)

 -- Simon Poirier <email address hidden> Tue, 27 Nov 2018 09:24:22 -0500