openstack-manuals/doc/install-guide/source/environment-ntp-other.rst

Other nodes

Other nodes reference the controller node for clock synchronization. Perform these steps on all other nodes.

Install and configure components

1. Install the packages:

   ubuntu or debian

   # apt-get install chrony

   rdo

   # yum install chrony

   obs

   On openSUSE:

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

   On SLES:

   # 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.

   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

ubuntu or debian

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

   server controller iburst

3. Restart the NTP service:

   # service chrony restart

rdo or obs

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

   server controller iburst

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

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