[Bug 805423] Re: pam_motd needs a module option to disable in-line dynamic updates

Andreas Hasenack andreas at canonical.com
Thu Jul 12 20:06:00 UTC 2012


landscape-common installs a script in /etc/update-motd.d to display a
banner with some basic system information.

It will not run the main landscape-sysinfo binary if the load is higher
than the number of cores, see /usr/share/landscape/landscape-
sysinfo.wrapper:

#!/bin/sh
cores=$(grep -c ^processor /proc/cpuinfo 2>/dev/null)
[ "$cores" -eq "0" ] && cores=1
threshold="${cores:-1}.0"
if [ $(echo "`cut -f1 -d ' ' /proc/loadavg` < $threshold" | bc) -eq 1 ]; then
    echo
    echo -n "  System information as of "
    /bin/date
    echo
    /usr/bin/landscape-sysinfo
else
    echo
    echo " System information disabled due to load higher than $threshold"
fi

Do you think it was landscape-sysinfo running that made your login take
more than 60s and thus timeout?

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https://bugs.launchpad.net/bugs/805423

Title:
  pam_motd needs a module option to disable in-line dynamic updates

Status in Landscape Client:
  New
Status in “pam” package in Ubuntu:
  Fix Released

Bug description:
  1) lsb_release -rd
  Description:	Ubuntu 10.04.2 LTS
  Release:	10.04

  2)  Installiert: 1.1.1-2ubuntu5.3
    Kandidat: 1.1.1-2ubuntu5.3
    Versions-Tabelle:
   *** 1.1.1-2ubuntu5.3 0
          500 http://de.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
          500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages
          100 /var/lib/dpkg/status
       1.1.1-2ubuntu2 0
          500 http://de.archive.ubuntu.com/ubuntu/ lucid/main Packages

  3) Login on systems with high load/a lot of io wait via ssh should
  still be possible.

  4) On servers with high load or a lot of io wait login times out,
  because pam_motd does io intensive calculations. This hurts even more
  when using nagios check_by_ssh. There should be a way to use a cron
  job again (like update-motd did). Logging into a system is more
  important than motd.

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