100 lines
1.8 KiB
ReStructuredText
100 lines
1.8 KiB
ReStructuredText
.. _environment-ntp-controller:
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=================
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Controller node
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=================
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Perform these steps on the controller node.
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Install and configure components
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================================
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1. Install the packages:
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For Ubuntu:
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.. code-block:: console
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# apt install chrony
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.. end
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For RHEL or CentOS:
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.. code-block:: console
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# yum install chrony
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.. end
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For SUSE:
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.. code-block:: console
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# zypper install chrony
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.. end
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2. Edit the ``chrony.conf`` file and add, change, or remove the following keys
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as necessary for your environment.
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For RHEL, CentOS, or SUSE, edit the ``/etc/chrony.conf`` file:
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.. path /etc/chrony.conf
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.. code-block:: ini
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server NTP_SERVER iburst
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.. end
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For Ubuntu, edit the ``/etc/chrony/chrony.conf`` file:
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.. path /etc/chrony/chrony.conf
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.. code-block:: ini
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server NTP_SERVER iburst
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.. end
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Replace ``NTP_SERVER`` with the hostname or IP address of a
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suitable more accurate (lower stratum) NTP server. The
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configuration supports multiple ``server`` keys.
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.. note::
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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
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servers such as those provided by your organization.
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3. To enable other nodes to connect to the chrony daemon on the
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controller node, add this key to the same ``chrony.conf`` file mentioned
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above:
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.. code-block:: ini
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allow 10.0.0.0/24
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.. end
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If necessary, replace ``10.0.0.0/24`` with a description of your
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subnet.
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4. Restart the NTP service:
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For Ubuntu:
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.. code-block:: console
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# service chrony restart
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.. end
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For RHEL, CentOS, or SUSE:
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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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.. end
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