[Bug 1878654] Re: Remove automatically added groups from os-login

[Łukasz Zemczak]

This bug has been pulled in via the backported changelog of google-
compute-engine-oslogin. Let's mark this as 'verification-done' and
perform all the actual verification in LP: #1899629 instead.

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Title:
  Remove automatically added groups from os-login

Status in gce-compute-image-packages package in Ubuntu:
  Fix Released
Status in gce-compute-image-packages source package in Xenial:
  Fix Released
Status in gce-compute-image-packages source package in Bionic:
  Fix Released
Status in gce-compute-image-packages source package in Eoan:
  Fix Released
Status in gce-compute-image-packages source package in Focal:
  Fix Released
Status in gce-compute-image-packages source package in Groovy:
  Fix Released

Bug description:
  [Impact]

  The google_oslogin_control script included in the google-compute-
  engine-oslogin binary package adds every new user to several
  unnecessary/unexpected groups. Upstream recommends disabling this
  behavior.

  [Test Case]

  Examine the /usr/bin/google_oslogin_control and ensure that the variable
  assignment for

    group_conf_entry

  in the modify_group_conf() function does not contain any of the
  following groups:

    dip, plugdev, adm, docker, lxd

  [Regression Potential]

  Implemented incorrectly, this could break group setup for users on new
  gce instances. Users may also have to alter configuration management
  tools that expect users to already have access to e.g. the docker or
  lxd group by default.

  [References]

  Upstream PR and commits:

    https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29

    https://github.com/GoogleCloudPlatform/guest-
  oslogin/commit/50b0fb7b5804c22ef9581e7dc91875801dfa5469

    https://github.com/GoogleCloudPlatform/guest-oslogin/pull/30

    https://github.com/GoogleCloudPlatform/guest-
  oslogin/commit/88f1ba85e20b3b3a07bfad2eeb723a6b06e41fc8

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