.. _environment-ntp-other:

Other nodes
~~~~~~~~~~~

Install and configure components
--------------------------------

Install the packages:

.. only:: ubuntu or debian

   .. code-block:: console

      # apt-get install chrony

.. only:: rdo

   .. code-block:: console

      # yum install chrony

.. only:: obs

   On openSUSE:

   .. code-block:: console

      # zypper addrepo -f obs://network:time/openSUSE_13.2 network_time
      # zypper refresh
      # zypper install chrony

   On SLES:

   .. code-block:: console

      # zypper addrepo -f obs://network:time/SLE_12 network_time
      # zypper refresh
      # zypper install chrony

   .. note::

      The packages are signed by GPG key ``17280DDF``. You should
      verify the fingerprint of the imported GPG key before using it.

      .. code-block:: console

         Key Name:         network OBS Project <network@build.opensuse.org>
         Key Fingerprint:  0080689B E757A876 CB7DC269 62EB1A09 17280DDF
         Key Created:      Tue 24 Sep 2013 04:04:12 PM UTC
         Key Expires:      Thu 03 Dec 2015 04:04:12 PM UTC

Configure the network and compute nodes to reference the controller
node.

.. only:: ubuntu or debian

   #. Edit the ``/etc/chrony/chrony.conf`` file and comment out or remove all
      but one ``server`` key. Change it to reference the controller node:

      .. code-block:: ini

         server controller iburst

   #. Restart the NTP service:

      .. code-block:: console

         # service chrony restart

.. only:: rdo or obs

   #. Edit the ``/etc/chrony.conf`` file and comment out or remove all but one
      ``server`` key. Change it to reference the controller node:

      .. code-block:: ini

         server controller iburst

   #. Start the NTP service and configure it to start when the system boots:

      .. code-block:: console

         # systemctl enable chronyd.service
         # systemctl start chronyd.service