10.2. Connecting a virtual machine to the default pod network


You can connect a virtual machine to the default internal pod network by configuring its network interface to use the masquerade binding mode.

注記

Traffic passing through network interfaces to the default pod network is interrupted during live migration.

10.2.1. Configuring masquerade mode from the CLI

You can use masquerade mode to hide a virtual machine’s outgoing traffic behind the pod IP address. Masquerade mode uses Network Address Translation (NAT) to connect virtual machines to the pod network backend through a Linux bridge.

Enable masquerade mode and allow traffic to enter the virtual machine by editing your virtual machine configuration file.

Prerequisites

  • You have installed the OpenShift CLI (oc).
  • The virtual machine must be configured to use DHCP to acquire IPv4 addresses.

Procedure

  1. Edit the interfaces spec of your virtual machine configuration file:

    apiVersion: kubevirt.io/v1
    kind: VirtualMachine
    metadata:
      name: example-vm
    spec:
      template:
        spec:
          domain:
            devices:
              interfaces:
                - name: default
                  masquerade: {} 
    1
    
                  ports: 
    2
    
                    - port: 80
    # ...
          networks:
          - name: default
            pod: {}
    1 1
    Connect using masquerade mode.
    2 1 2
    Optional: List the ports that you want to expose from the virtual machine, each specified by the port field. The port value must be a number between 0 and 65536. When the ports array is not used, all ports in the valid range are open to incoming traffic. In this example, incoming traffic is allowed on port 80.
    注記

    Ports 49152 and 49153 are reserved for use by the libvirt platform and all other incoming traffic to these ports is dropped.

  2. Create the virtual machine:

    $ oc create -f <vm-name>.yaml
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