10.11.3. Hot unplugging a secondary network interface by using the CLI

Procedure

1. Edit the VM specification to hot unplug a secondary network interface. Setting the interface state to absent detaches the network interface from the guest, but the interface still exists in the pod.

   $ oc edit vm <vm_name>

   Example VM configuration

   apiVersion: kubevirt.io/v1
   kind: VirtualMachine
   metadata:
     name: vm-fedora
   template:
     spec:
       domain:
         devices:
           interfaces:
             - name: defaultnetwork
               masquerade: {}
             # set the interface state to absent
             - name: <secondary_nic>
               state: absent
               bridge: {}
       networks:
         - name: defaultnetwork
           pod: {}
         - name: <secondary_nic>
           multus:
             networkName: <nad_name>
   # ...

   Set the interface state to absent to detach it from the running VM. Removing the interface details from the VM specification does not hot unplug the secondary network interface.

2. Remove the interface from the pod by migrating the VM:

   $ virtctl migrate <vm_name>