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  1. OVIRT-1658

Potential issue coming to CentOS7 slaves (glibc, missing UTF-8 locale)


    • Type: Bug
    • Status: Done
    • Priority: Medium
    • Resolution: Won't Do
    • Affects versions: None
    • Fix versions: OVIRT-INFRA-JUN-AUG-2018
    • Components: None
    • Labels:


      Seems there is an issue with locale files in recent CentOS versions,
      and we're hitting it in slaves that have been updated recently.

      The symptoms are that Jenkins disconnects from the slave and then
      refuses to reconnect to it. The agent log in Jenkins shows:

      [09/19/17 15:42:56] [SSH] Connection closed.

      [09/19/17 15:58:48] [SSH] Opening SSH connection to
      [09/19/17 15:58:48] [SSH] WARNING: SSH Host Keys are not being
      verified. Man-in-the-middle attacks may be possible against this

      [09/19/17 15:58:48] [SSH] Authentication successful.
      SSH connection reports a garbage before a command execution.
      Check your .bashrc, .profile, and so on to make sure it is quiet.
      The received junk text is as follows:
      /etc/profile.d/lang.sh: line 19: warning: setlocale: LC_CTYPE: cannot
      change locale (en_US.utf8): No such file or directory
      /etc/profile.d/lang.sh: line 20: warning: setlocale: LC_COLLATE:
      cannot change locale (en_US.utf8): No such file or directory
      /etc/profile.d/lang.sh: line 23: warning: setlocale: LC_MESSAGES:
      cannot change locale (en_US.utf8): No such file or directory
      /etc/profile.d/lang.sh: line 26: warning: setlocale: LC_NUMERIC:
      cannot change locale (en_US.utf8): No such file or directory
      /etc/profile.d/lang.sh: line 29: warning: setlocale: LC_TIME: cannot
      change locale (en_US.utf8): No such file or directory

      [09/19/17 15:58:48] Launch failed - cleaning up connection
      [09/19/17 15:58:48] [SSH] Connection closed.

      The same locale error messages can also be reproduced on the slave by
      running an interactive login from the console or 'su -'. When running
      'locale -a' you can also see the en_US.UTF-8 locale is somehow

      Looking around for this I found the following:

      I tried downgrading glibc back to the version we had before, but that
      did not seem to resolve the issue. Eventually I managed to resolve it
      by running 'localedef -i en_US -f UTF-8 en_US.UTF-8' on the slave.

      I've seen this happen on 'vm0002.workers-phx.ovirt.org' which is
      attached to the staging Jenkins, but I've no reason to believe this
      won't start impacting production slaves.

      We need to research this further and find out if we need to do
      something to prevent this issue from surfacing on production slaves.

      Barak Korren
      RHV DevOps team , RHCE, RHCi
      Red Hat EMEA
      redhat.com | TRIED. TESTED. TRUSTED. | redhat.com/trusted


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              • Assignee:
                Evgheni Dereveanchin
                Barak Korren
              • Votes:
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                • Created: