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Chapter 1. Creating a RHOSO environment with a routed spine-leaf network topology

A spine-leaf architecture can enhance a Red Hat OpenStack Services on OpenShift (RHOSO) environment with improved scalability, low latency, east-west performance improvements, redundancy, simplicity, and cost-effectiveness.

In a routed spine-leaf data center topology, the Red Hat OpenStack Services on OpenShift (RHOSO) control plane is hosted on the Leaf 0 rack. Each data plane leaf is represented as a node set in a data center rack. The networks are presented to the nodes, which have been assigned to node sets.

To create a RHOSO environment with a routed spine-leaf network topology, you must complete the following tasks:

  1. Install OpenStack Operator (openstack-operator) on an operational RHOCP cluster.
  2. Provide secure access to the RHOSO services.
  3. Create and configure the control plane network for a routed spine-leaf network topology.
  4. Create and configure the data plane networks for a routed spine-leaf network topology.
  5. Create a control plane for your environment.
  6. Create and configure the nodes for each leaf on the data plane.

You perform the control plane installation tasks and all data plane creation tasks on a workstation that has access to the RHOCP cluster.

Note

You cannot use the provisioning network in a routed spine-leaf network environment. You must configure provisioning to use the RHOCP machine network. The machine network is the network used by RHOCP cluster nodes to communicate with each other. The machine network is also the subnet that includes the API and Ingress VIPs. You configure the machine network by specifying the IP address blocks for the nodes that form the cluster in the machineNetwork field of the RHOCP install-config.yaml file. For more details about the RHOCP machine network, see the following RHOCP resources:

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