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

Network Time Protocol (NTP)

You should install Chrony, an implementation of NTP <Network Time Protocol (NTP)>, to properly synchronize services among nodes. We recommend that you configure the controller node to reference more accurate (lower stratum) servers and other nodes to reference the controller node.

environment-ntp-controller.rst environment-ntp-other.rst environment-ntp-verify.rst