[Bug 1695870] Re: [regression] sssd won't start if autofs is not installed

[Simon Major]

Proposed worked for me too on one of my impacted systems.

Before reboot:

sudo vi /etc/apt/sources.list ; sudo vi /etc/apt/preferences.d/proposed-
updates ; sudo apt-get update ; sudo apt-get --only-upgrade install sssd
/trusty-proposed libsss-sudo/trusty-proposed

After reboot:

uptime ; dpkg -l | grep -E 'sss|autofs'

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Title:
  [regression] sssd won't start if autofs is not installed

Status in sssd package in Ubuntu:
  Confirmed
Status in sssd source package in Trusty:
  Fix Committed

Bug description:
  [Impact]

   * On Trusty, SSSD does not start when AutoFS is not installed because the AutoFS "starting" signal is not emitted.
   * This only affects the upstart service (Trusty). Systemd services work fine.

  [Test Case]

   * Install SSSD in a machine without AutoFS and reboot.
   * The service won't start on boot, even though it can be started manually.

  [Regression Potential]

   * None expected, but if one is found it will only impact the startup
  of SSSD at boot

  [Original Description]

  The fix for LP# 1566508 (in Ubuntu 14.04 at least) introduces a
  regression that prevents sssd from starting if the autofs package is
  not installed.

  The /etc/init/sssd.conf script now has:

  ```
  start on (filesystem and net-device-up and starting autofs)
  ```

  The "starting autofs" will never happen if autofs is not installed.

  That's critical in that that prevents authentication after the next
  boot after "sssd" has been upgraded.

  The work around for now is to remove that "and starting autofs" or
  install the autofs package.

  ```
  $ apt-cache policy sssd
  sssd:
    Installed: 1.11.8-0ubuntu0.6
    Candidate: 1.11.8-0ubuntu0.6
    Version table:
   *** 1.11.8-0ubuntu0.6 0
          500 http://gb.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.11.5-1ubuntu3 0
          500 http://gb.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
  ```

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