245fe26289
Change-Id: Id56dfc8572824d1dad47eee014870c9a64381645 Implements: blueprint installguide-liberty
92 lines
2.2 KiB
ReStructuredText
92 lines
2.2 KiB
ReStructuredText
.. _environment-ntp-controller:
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Controller node
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~~~~~~~~~~~~~~~
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Install and configure components
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--------------------------------
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Install the packages:
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.. only:: ubuntu or debian
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.. code-block:: console
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# apt-get install chrony
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.. only:: rdo
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.. code-block:: console
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# yum install chrony
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.. only:: obs
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On openSUSE:
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.. code-block:: console
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# zypper addrepo http://download.opensuse.org/repositories/network:time/openSUSE_13.2/network:time.repo
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# zypper refresh
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# zypper install chrony
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On SLES:
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.. code-block:: console
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# zypper addrepo http://download.opensuse.org/repositories/network:time/SLE_12/network:time.repo
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# zypper refresh
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# zypper install chrony
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By default, the controller node synchronizes the time via a pool of
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public servers. However, you can optionally configure alternative servers such
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as those provided by your organization.
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.. only:: ubuntu or debian
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#. Edit the ``/etc/chrony/chrony.conf`` file and add, change, or remove the
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following keys as necessary for your environment:
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.. code-block:: ini
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server NTP_SERVER iburst
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Replace ``NTP_SERVER`` with the hostname or IP address of a suitable more
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accurate (lower stratum) NTP server. The configuration supports multiple
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``server`` keys.
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#. Restart the NTP service:
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.. code-block:: console
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# service chrony restart
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.. only:: rdo or obs
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#. Edit the ``/etc/chrony.conf`` file and add, change, or remove the
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following keys as necessary for your environment:
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.. code-block:: ini
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server NTP_SERVER iburst
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Replace ``NTP_SERVER`` with the hostname or IP address of a suitable more
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accurate (lower stratum) NTP server. The configuration supports multiple
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``server`` keys.
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#. To enable other nodes to connect to the chrony daemon on the controller,
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add the following key to the ``/etc/chrony.conf`` file:
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.. code-block:: ini
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allow 10.0.0.0/24
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If necessary, replace ``10.0.0.0/24`` with a description of your subnet.
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#. Start the NTP service and configure it to start when the system boots:
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.. code-block:: console
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# systemctl enable chronyd.service
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# systemctl start chronyd.service
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