Chapter 3. Configure SR-IOV Support for Virtual Networking

Set the tuned configuration to enable CPU affinity.

  install_tuned:
    type: OS::Heat::SoftwareConfig
    properties:
      config:
        str_replace:
          template: |
            #!/bin/bash
            FORMAT=$COMPUTE_HOSTNAME_FORMAT
            if [[ -z $FORMAT ]] ; then
              FORMAT="compute" ;
            else
              # Assumption: only %index% and %stackname% are the variables in Host name format
              FORMAT=$(echo $FORMAT | sed  's/\%index\%//g' | sed 's/\%stackname\%//g') ;
            fi
            if [[ $(hostname) == *$FORMAT* ]] ; then
              # Install the tuned package
              yum install -y tuned-profiles-cpu-partitioning

              tuned_conf_path="/etc/tuned/cpu-partitioning-variables.conf"
              if [ -n "$TUNED_CORES" ]; then
                grep -q "^isolated_cores" $tuned_conf_path
                if [ "$?" -eq 0 ]; then
                  sed -i 's/^isolated_cores=.*/isolated_cores=$TUNED_CORES/' $tuned_conf_path
                else
                  echo "isolated_cores=$TUNED_CORES" >> $tuned_conf_path
                fi
                tuned-adm profile cpu-partitioning
              fi
            fi
          params:
            $COMPUTE_HOSTNAME_FORMAT: {get_param: ComputeHostnameFormat}
            $TUNED_CORES: {get_param: HostIsolatedCoreList}

Set the Kernel arguments:

  compute_kernel_args:
    type: OS::Heat::SoftwareConfig
    properties:
      config:
        str_replace:
          template: |
            #!/bin/bash
            set -x
            FORMAT=$COMPUTE_HOSTNAME_FORMAT
            if [[ -z $FORMAT ]] ; then
              FORMAT="compute" ;
            else
              # Assumption: only %index% and %stackname% are the variables in Host name format
              FORMAT=$(echo $FORMAT | sed  's/\%index\%//g' | sed 's/\%stackname\%//g') ;
            fi
            if [[ $(hostname) == *$FORMAT* ]] ; then
              sed 's/^\(GRUB_CMDLINE_LINUX=".*\)"/\1 $KERNEL_ARGS"/g' -i /etc/default/grub ;
              grub2-mkconfig -o /etc/grub2.cfg

              sleep 5
              reboot
            fi
          params:
            $KERNEL_ARGS: {get_param: ComputeKernelArgs}
            $COMPUTE_HOSTNAME_FORMAT: {get_param: ComputeHostnameFormat}

Add first-boot.yaml under resource_registry to set the CPU tuning.

  resource_registry:
    # Specify the relative/absolute path to the config files you want to use for override the default.
    OS::TripleO::Compute::Net::SoftwareConfig: nic-configs/compute.yaml
    OS::TripleO::Controller::Net::SoftwareConfig: nic-configs/controller.yaml
    # First boot and Kernel Args
    OS::TripleO::NodeUserData: first-boot.yaml

Under parameter_defaults, disable the tunnel type (set the value to ""), and set network type to vlan.

NeutronTunnelTypes: ''
NeutronNetworkType: 'vlan'

Under parameter_defaults, map the Open vSwitch physical network to the bridge.

  NeutronBridgeMappings: 'tenant:br-link0'

Under parameter_defaults, set the OpenStack Networking ML2 and Open vSwitch VLAN mapping range.

  NeutronNetworkVLANRanges: 'tenant:22:22,tenant:25:25'

Under parameter_defaults, set the SR-IOV configuration parameters.

Under parameter_defaults, reserve the RAM for the host processes.

  NovaReservedHostMemory: 4096

Under parameter_defaults, set a comma-separated list or range of physical CPU cores to reserve for virtual machine processes.

  NovaVcpuPinSet: "1-19,21-39"

Under parameter_defaults, list the the applicable filters.

Nova scheduler applies these filters in the order they are listed. List the most restrictive filters first to make the filtering process for the nodes more efficient.

  NovaSchedulerDefaultFilters:
    - "RetryFilter"
    - "AvailabilityZoneFilter"
    - "RamFilter"
    - "ComputeFilter"
    - "ComputeCapabilitiesFilter"
    - "ImagePropertiesFilter"
    - "ServerGroupAntiAffinityFilter"
    - "ServerGroupAffinityFilter"
    - "PciPassthroughFilter"
    - "NUMATopologyFilter"
    - "AggregateInstanceExtraSpecsFilter"

Under parameter_defaults, define the ComputeKernelArgs parameters to be included in the default grub file at first boot.

  ComputeKernelArgs: "default_hugepagesz=1GB hugepagesz=1G hugepages=12 intel_iommu=on iommu=pt"

Under parameter_defaults, set a list or range of physical CPU cores to be tuned.

The given argument is appended to the tuned cpu-partitioning profile.

  HostIsolatedCoreList: "1-19,21-39"

Create the Linux bond for an isolated network.

  -
    type: linux_bond
    name: bond_api
    bonding_options: "mode=active-backup"
    use_dhcp: false
    dns_servers: {get_param: DnsServers}
    members:
      -
        type: interface
        name: nic3
        primary: true
      -
        type: interface
        name: nic4

Assign VLANs to this Linux bond.

  -
    type: vlan
    vlan_id: {get_param: InternalApiNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: InternalApiIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: TenantNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: TenantIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: StorageNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: StorageIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: StorageMgmtNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: StorageMgmtIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: ExternalNetworkVlanID}
    device: bond_api
    addresses:
    -
      ip_netmask: {get_param: ExternalIpSubnet}
    routes:
      -
        default: true
        next_hop: {get_param: ExternalInterfaceDefaultRoute}

Create the OVS bridge for access to neutron-dhcp-agent and neutron-metadata-agent services.

  -
    type: ovs_bridge
    name: br-link0
    use_dhcp: false
    mtu: 9000
    members:
      -
        type: ovs_bond
        name: bond0
        use_dhcp: true
        members:
          -
            type: interface
            name: nic7
            mtu: 9000
          -
            type: interface
            name: nic8
            mtu: 9000

Create the Linux bond for an isolated network.

  -
    type: linux_bond
    name: bond_api
    bonding_options: "mode=active-backup"
    use_dhcp: false
    dns_servers: {get_param: DnsServers}
    members:
      -
        type: interface
        name: nic3
        # force the MAC address of the bridge to this interface
        primary: true
      -
        type: interface
        name: nic4

Assign VLANs to this Linux bond.

  -
    type: vlan
    vlan_id: {get_param: InternalApiNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: InternalApiIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: TenantNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: TenantIpSubnet}
  -
    type: vlan
    vlan_id: {get_param: StorageNetworkVlanID}
    device: bond_api
    addresses:
      -
        ip_netmask: {get_param: StorageIpSubnet}

Set the two SR-IOV interfaces by adding the following to the compute.yaml file.

  -
    type: interface
    name: p7p1
    mtu: 9000
    use_dhcp: false
    defroute: false
    nm_controlled: true
    hotplug: true

  -
    type: interface
    name: p7p2
    mtu: 9000
    use_dhcp: false
    defroute: false
    nm_controlled: true
    hotplug: true