Network requirements

The general network requirements are the following:

  • All network interfaces on a node must be assigned IP addresses that belong to different subnets. A network interface can be a VLAN-tagged logical interface, an untagged bond, or an Ethernet link.
  • The network for internal traffic can be non-routable, with minimum 10 Gbit/s bandwidth.
  • Nodes are added to clusters by their IP addresses, not FQDNs. Changing the IP address of a node in the cluster will remove that node from the cluster. If you plan to use DHCP in a cluster, make sure that IP addresses are bound to the MAC addresses of the nodes’ network interfaces.
  • Each node must have Internet access so that updates can be installed.
  • Network time synchronization is required for correct statistics. It is enabled by default via the chronyd service. If you want to use ntpdate or ntpd, stop and disable chronyd first.
Related Topics Link IconSee also