OpenShift Container Platform

You can review the following information to understand some additional considerations when adding remote worker nodes to a cluster.

You must ensure that a route or a default gateway is in place to route traffic between the control plane and every remote worker node.
You must place the Ingress VIP on the control plane.
Adding remote worker nodes with user-provisioned infrastructure is identical to adding other worker nodes.
To add remote worker nodes to an installer-provisioned cluster at install time, specify the subnet for each worker node in the install-config.yaml file before installation. There are no additional settings required for the DHCP server. You must use virtual media, because the remote worker nodes will not have access to the local provisioning network.
To add remote worker nodes to an installer-provisioned cluster deployed with a provisioning network, ensure that virtualMediaViaExternalNetwork flag is set to true in the install-config.yaml file so that it adds the nodes using virtual media. Remote worker nodes will not have access to the local provisioning network. They must be deployed with virtual media rather than PXE. Additionally, specify each subnet for each group of remote worker nodes and the control plane nodes in the DHCP server.