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Disabling multicast for a project

In OpenShift Container Platform with OVN-Kubernetes, you can disable IP multicast on a per-project basis so pods no longer receive multicast traffic.

Disable multicast between pods​

To disable multicast between pods in a project, you can remove the k8s.ovn.org/multicast-enabled annotation from the namespace by using the oc annotate command or a namespace manifest.

Prerequisites

  • Install the OpenShift CLI (oc).
  • You must log in to the cluster with a user that has the cluster-admin role.

Procedure

  • Disable multicast by running the following command:

    $ oc annotate namespace <namespace> \
        k8s.ovn.org/multicast-enabled-

    For <namespace>, specify the namespace for the project you want to disable multicast for.

    tip

    You can alternatively apply the following YAML to delete the annotation:

    apiVersion: v1
    kind: Namespace
    metadata:
      name: <namespace>
      annotations:
        k8s.ovn.org/multicast-enabled: null