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Enable SR-IOV with OVS

Note

Consider this section as part of Deploy an OpenStack cluster.

This section instructs you on how to enable SR-IOV with the Neutron OVS back end.

To enable SR-IOV with OVS:

  1. Verify that your deployment meets the following requirements:

    • NICs with the SR-IOV support are installed

    • SR-IOV and VT-d are enabled in BIOS

  2. Enable IOMMU in the kernel by configuring intel_iommu=on in the GRUB configuration file. Specify the parameter for compute nodes in BareMetalHostProfile in the grubConfig section:

    spec:
  grubConfig:
      defaultGrubOptions:
        - 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX intel_iommu=on"'

  3. Configure the OpenStackDeployment CR to deploy OpenStack with the VLAN tenant network encapsulation.

    Caution

    To ensure correct appliance of the configuration changes, configure VLAN segmentation during the initial OpenStack deployment.

    Configuration example:

    spec:
  features:
    neutron:
      external_networks:
      - bridge: br-ex
        interface: pr-floating
        mtu: null
        network_types:
        - flat
        physnet: physnet1
        vlan_ranges: null
      - bridge: br-tenant
        interface: bond0
        network_types:
          - vlan
        physnet: tenant
        vlan_ranges: 490:499,1420:1459
      tenant_network_types:
        - vlan

  4. Enable SR-IOV in the OpenStackDeployment CR through the node-specific overrides settings. For example:

    spec:
  nodes:
    <NODE-LABEL>::<NODE-LABEL-VALUE>:
      features:
        neutron:
          sriov:
            enabled: true
            nics:
            - device: enp10s0f1
              num_vfs: 7
              physnet: tenant

See also