The data center light time synchronisation¶

Architecture¶

• We use 3 nodes per data center that use 2.pool.ntp.org (this pool is IPv6 enabled) as a source
  • Usually this is based on APUs
• All other nodes use ntp.placeX.ungleich.ch as a time source
• All nodes have chronyd installed and running
  • ntp seems to be unreliable
  • ntpdate does not exist in alpine linux
  • chrony exists on alpine/debian/devuan/ubuntu

Due to network firewalls, ntp.placeX.ungleich.ch is only reachable from the server network and not for public usage.

Configuration¶

• We use the __dcl_ntp cdist type