openstack/openstack-manuals
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ce2c661937
openstack-manuals/doc/install-guide/source/environment-ntp-controller.rst
Nicolas Bock b6291c1ec8 [install] Remove chrony repositories on obs 
The chrony package is included in the standard Leap 42.2 and SLES-12-SP2
repositories. It is not necessary anymore to add a special repository.

backport: newton
Change-Id: I94495209e12237eff5e5f26e56785173289e0494
2016-11-29 18:06:54 +00:00

2.6 KiB
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Controller node

Perform these steps on the controller node.

Install and configure components

  1. Install the packages:

    ubuntu or debian

    # apt install chrony

    rdo

    # yum install chrony

    obs

    # zypper install chrony

ubuntu or debian

  1. Edit the /etc/chrony/chrony.conf file and add, change, or remove these keys as necessary for your environment:

    server NTP_SERVER iburst

    Replace NTP_SERVER with the hostname or IP address of a suitable more accurate (lower stratum) NTP server. The configuration supports multiple server keys.

    Note

    By default, the controller node synchronizes the time via a pool of public servers. However, you can optionally configure alternative servers such as those provided by your organization.

  2. To enable other nodes to connect to the chrony daemon on the controller node, add this key to the /etc/chrony/chrony.conf file:

    allow 10.0.0.0/24

  3. Restart the NTP service:

    # service chrony restart

rdo or obs

  1. Edit the /etc/chrony.conf file and add, change, or remove these keys as necessary for your environment:

    server NTP_SERVER iburst

    Replace NTP_SERVER with the hostname or IP address of a suitable more accurate (lower stratum) NTP server. The configuration supports multiple server keys.

    Note

    By default, the controller node synchronizes the time via a pool of public servers. However, you can optionally configure alternative servers such as those provided by your organization.

  2. To enable other nodes to connect to the chrony daemon on the controller node, add this key to the /etc/chrony.conf file:

    allow 10.0.0.0/24

    If necessary, replace 10.0.0.0/24 with a description of your subnet.

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

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