Converting to IPv4/IPv6 dual-stack networking

As a cluster administrator, you can convert your single-stack cluster network to a dual-stack cluster network.

Prerequisites

• You installed the OpenShift CLI (oc).

• You are logged in to the cluster with a user with cluster-admin privileges.

• Your cluster uses the OVN-Kubernetes network plugin.

• The cluster nodes have IPv6 addresses.

Procedure

1. To specify IPv6 address blocks for the cluster and service networks, create a file containing the following YAML:

2. To patch the cluster network configuration, enter the following command:

   $ oc patch network.config.openshift.io cluster \
     --type='json' --patch-file <file>.yaml

   where:

   Specifies the name of the file you created in the previous step.

   Example output

Verification

Complete the following step to verify that the cluster network recognizes the IPv6 address blocks that you specified in the previous procedure.

1. $ oc describe network

   Example output

Converting to a single-stack cluster network

As a cluster administrator, you can convert your dual-stack cluster network to a single-stack cluster network.

Prerequisites

• You are logged in to the cluster with a user with cluster-admin privileges.

• Your cluster uses the OVN-Kubernetes network plugin.

• The cluster nodes have IPv6 addresses.

• You have enabled dual-stack networking.

Procedure

1. $ oc edit networks.config.openshift.io