Planning for the Installation

Before installing VMware Container Networking with Antrea on OpenShift, note the information below and perform the prerequisite tasks.

• You can install OpenShift on a VM in vSphere or on a physical server.
• The installation instruction to install on vSphere is at https://docs.openshift.com/container-platform/4.9/installing/installing_vsphere/installing-vsphere.html.
• When installing the OpenShift cluster, select Antrea as the CNI. After the cluster is installed, the CNI cannot be changed. This is a Redhat limitation.
• Go to https://downloads.vmware.com, search for "VMware Container Networking with Antrea" and select "VMware Antrea 1.x Product Binaries". Download the following:
  • VMware Container Networking with Antrea (Advanced) – UBI image
  • VMware Container Networking with Antrea, K8s Operator Image
  • VMware Container Networking with Antrea, K8s Operator Manifests
• For the installation, you will need the Antrea container image and the Antrea Kubernetes Operator container image. These images can be made available in a Container Registry.
• OpenShift node VMs can be connected to vSphere VDS or N-VDS (NSX-managed VDS).
• A DHCP server is needed to provide IP addresses to the controller and worker nodes.
• You must configure two DNS entries for the OpenShift cluster. Details are in the OpenShift documentation. They are for the parameters apiVIP and ingressVIP. These parameters are in the install-config.yaml file mentioned below.