See below for the IP requirements of the PKI Hub nodes.

Node IP version requirements

PKI Hub supports IPv4 only. IPv6 is not supported and is disabled by default.

Node IP address requirements

All nodes must use private IPv4 addresses within the following ranges (see RFC 1918):

  • 10.0.0.0/8
  • 172.16.0.0/12
  • 192.168.0.0/16

Both the hostname and IP address must be static (not subject to change).

After running the clusterctl install or clusterctl node add commands you cannot change the IP address or hostname of a node. 

Node subnet requirements

All nodes must be in the same subnet.

After the installation, run the following command on each node to check the IP address and subnet mask:

nmcli device show

Verify that all nodes are in the same subnet by ensuring their IP addresses share the same network prefix and subnet mask.