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[Rolf Wojtech <rolf@xxxxxxxxxx>]

*** This bug is a duplicate of bug 1422345 ***
    https://bugs.launchpad.net/bugs/1422345

** This bug has been marked a duplicate of bug 1422345
   stop being nice does not work

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https://bugs.launchpad.net/bugs/1433584

Title:
  Version 0.82.1ubuntu2.1 breaks unattended upgrades on unprivileged
  Docker containers

Status in unattended-upgrades package in Ubuntu:
  New

Bug description:
  Since update of the unattended-upgrades package to version
  0.82.1ubuntu2.1, unprivileged Docker containers cannot properly
  perform unattended upgrades anymore. They fail with the following
  error message:

  =================================================
  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1186, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 993, in main
      os.nice(-19)
  PermissionError: [Errno 1] Operation not permitted
  =================================================

  This is due to the fact that the script tries to set a negative nice
  value, which is by default not allowed on unprivileged Docker
  containers. In previous package versions, the script was trying to set
  a nice value of 0, which was allowed.

  To solve this issue, two solutions could be considered:
  - The unattended-upgrades package should remain using a nice value of 0
  - The containers should be started with the "--cap-add=CAP_SYS_NICE" option. Unfortunately, it is not possible to add this capability to running containers.

  More information:

  # lsb_release -rd
  Description:    Ubuntu 14.04.1 LTS
  Release:        14.04

  # apt-cache policy unattended-upgrades
  unattended-upgrades:
    Installed: 0.82.1ubuntu2.1
    Candidate: 0.82.1ubuntu2.1
    Version table:
   *** 0.82.1ubuntu2.1 0
          500 http://ubunturepo/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       0.82.1ubuntu2 0
          500 http://ubunturepo/ trusty/main amd64 Packages

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