touch-packages team mailing list archive

[Scott Moser <smoser@xxxxxxxxxx>]

*** This bug is a duplicate of bug 525674 ***
    https://bugs.launchpad.net/bugs/525674

** This bug has been marked a duplicate of bug 525674
   apt-check hangs, preventing login via SSH

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to openssh in Ubuntu.
https://bugs.launchpad.net/bugs/1426023

Title:
  apt-check should not be run from update-motd

Status in openssh package in Ubuntu:
  New
Status in update-notifier package in Ubuntu:
  New

Bug description:
  If i launch a new cloud instance, and then ssh to it, my ssh login
  blocks, stopping me from doing useful work while '/usr/lib/update-
  notifier/apt-check' runs.

  By far, the biggest offender of this slow login is /usr/lib/update-notifier/apt-check.
  To demonstrate, a fresh cloud instance on azure.

  ## ssh to the instance and run a non-interactive command:
  $ time ssh $cloudhost /bin/true
  real	0m5.066s
  user	0m0.045s
  sys	0m0.004s

  ## ssh in and disable updates-available so it wont run at all
  $ ssh $cloudhost sudo chmod -x /etc/update-motd.d/90-updates-available
  $ time ssh $cloudhost /bin/true
  real	0m2.459s
  user	0m0.026s
  sys	0m0.015s

  ## so disabling that bought us 2.5 seconds back.

  ## How about entirely disabling update-motd
  $ ssh $cloudhost "sudo cp /etc/pam.d/sshd /etc/pam.d/sshd.dist"
  $ ssh $cloudhost "sudo sed -i '/^[^#].*pam_motd/s/^/#/' /etc/pam.d/sshd"
  $ time ssh $cloudhost /bin/true
  real  0m0.650s
  user  0m0.041s
  sys   0m0.004s

  Note, that these things happen even for non-interactive logins, where
  the message of the day is completely swallowed.  Automation tools
  suffer this ever time they ssh to a ubuntu system.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: update-notifier-common 3.157
  ProcVersionSignature: User Name 3.16.0-30.40-generic 3.16.7-ckt3
  Uname: Linux 3.16.0-30-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  Date: Thu Feb 26 16:27:02 2015
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-notifier
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1426023/+subscriptions