Page History

Prior to attempting to install opHA and undertaking configuration it is CRITICAL that clock synchronisation via ntpd or chronyd is fully operational and all systems validate as being synchronise off a similar clock source linked to the global clocking infrastructure.

chronyd is purported to be better suited to virtual environments and contains additional reporting features to assist with troubleshooting when used in a private clock distribution setup. ChronyD is the default for RedHat.

The requirement for good timekeeping is a basic logging element however, SSL crypto is time dependent and variation in time beyond a couple of minutes can cause various rejections, timeout responses and failures.

Having the time of day clock synchronised is an underlying design feature of streaming cryptography such as SSL as a component of the protection mechanism.