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NFV SRIOV

This document describes how to deploy EDPM nodes with SRIOV.

Procedure Overview

  1. Configure kernel args and tuned parameters
  2. Configure SRIOV parameters
  3. Configure the networks with SRIOV interfaces of the EDPM nodes
  4. Configure Nova and Neutron parameters.

In order to complete the above procedure, the services list of the OpenStackDataPlaneNodeSet CR needs to be edited.

OpenStackDataPlaneNodeSet services list

EDPM nodes can be configured by creating an OpenStackDataPlaneNodeSet CR which the openstack-operator will reconcile to create OpenStackDataPlaneService resources when an OpenStackDataPlaneNodeSet CR is created. These types of CRs have a services list like the following:

apiVersion: dataplane.openstack.org/v1beta1
kind: OpenStackDataPlaneNodeSet
spec:
  ...
  services:
    - bootstrap
    - download-cache
    - configure-network
    - validate-network
    - install-os
    - configure-os
    - ssh-known-hosts
    - run-os
    - reboot-os
    - install-certs
    - libvirt
    - ovn
    - neutron-ovn
    - nova-custom-sriov
    - neutron-sriov
    - neutron-metadata

Only the services which are on the list will be configured. All these services are created using OpenStackDataPlaneService CR.

Configure the EDPM ansible variables of the EDPM nodes

Following are the list of EDPM ansible variables which need to be provided for deploying with SRIOV support.

edpm_kernel_args: Configures kernel boot parameters

edpm_tuned_profile: tuned profile configuration

edpm_tuned_isolated_cores: List of isolated cores

edpm_nova_libvirt_qemu_group: Configures qemu group for nova libvirt

Example:

edpm_kernel_args: "default_hugepagesz=1GB hugepagesz=1G hugepages=64 iommu=pt intel_iommu=on tsx=off isolcpus=2-11,14-23"
edpm_tuned_profile: "cpu-partitioning"
edpm_tuned_isolated_cores: "2-11,14-23"
edpm_nova_libvirt_qemu_group: "hugetlbfs"

edpm_network_config_template: SRIOV enabled network interfaces should be specified in the network config templates to configure SRIOV on the EDPM node. This example also assumes that the EDPM nodes:

  • PXE and boot settings are already configured.
  • Are at least one baremetal compute with SRIOV interfaces.
edpm_network_config_template
  -
    type: sriov_pf
    name: nic3
    numvfs: 10
    use_dhcp: false
    promisc: true

Create an OpenStackDataPlaneNodeSet CR file, e.g. dataplane_cr.yaml to represent the EDPM nodes. See dataplane_v1beta1_openstackdataplanenodeset.yaml for an example to modify as described in this document.

Do not yet create the CR in OpenShift as the edits described in the
next sections are required.

The example dataplane_v1beta1_openstackdataplanenodeset_sriov.yaml has SRIOV interfaces network configuration and required edpm ansible parameters.

Modify your OpenStackDataPlaneNodeSet CR to set edpm-ansible variables so that the edpm_network_config role will configure networks with SRIOV interfaces.

Configure Nova

Create a ConfigMap with content to be added to /etc/nova/nova.conf.d/,

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: cpu-pinning-nova
data:
  25-cpu-pinning-nova.conf: |
    [DEFAULT]
    reserved_host_memory_mb = 4096
    [compute]
    cpu_shared_set = 0-3,24-27
    cpu_dedicated_set = 8-23,32-47

The filename, e.g. 25-cpu-pinning-nova.conf, must match *nova*.conf and the files are evaluated by Nova alphabetically (e.g. 01-foo-nova.conf is processed before 02-bar-nova.conf).

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: sriov-nova
data:
  03-sriov-nova.conf: |
    [pci]
    device_spec = {"vendor_id":"8086", "product_id":"1572", "address": "0000:19:00.3", "physical_network":"sriov-phy4", "trusted":"true"}

The filename, e.g. 03-sriov-nova.conf, must match *nova*.conf and the files are evaluated by Nova alphabetically (e.g. 01-foo-nova.conf is processed before 02-bar-nova.conf).

Create a custom version of the nova service which ships with the openstack operator so that it uses the ConfigMap by adding it to the configMaps list.

---
apiVersion: dataplane.openstack.org/v1beta1
kind: OpenStackDataPlaneService
metadata:
  name: nova-custom-sriov
spec:
  label: dataplane-deployment-nova-custom-sriov
  dataSources:
    - configMapRef:
        name: cpu-pinning-nova
    - configMapRef:
        name: sriov-nova
    - secretRef:
        name: nova-cell1-compute-config
    - secretRef:
        name: nova-migration-ssh-key
  playbook: osp.edpm.nova
  tlsCert:
    contents:
      - dnsnames
      - ips
    networks:
      - ctlplane
    issuer: osp-rootca-issuer-internal
  caCerts: combined-ca-bundle

The custom service is named nova-custom-sriov. It cannot be named nova because nova is an immutable default service and will overwrite any custom service with the same name during reconciliation.

After the ConfigMap and OpenStackDataPlaneService services above have been created (e.g. oc create -f nova-custom-sriov.yaml), update the OpenStackDataPlaneNodeSet EDPM services list to replace the nova service with nova-custom-sriov.

apiVersion: dataplane.openstack.org/v1beta1
kind: OpenStackDataPlaneNodeSet
spec:
  ...
  roles:
    edpm-compute:
      ...
      services:
        - bootstrap
        - download-cache
        - configure-network
        - validate-network
        - install-os
        - configure-os
        - ssh-known-hosts
        - run-os
        - reboot-os
        - install-certs
        - libvirt
        - ovn
        - neutron-ovn
        - nova-custom-sriov
        - neutron-sriov
        - neutron-metadata

The bootstrap, configure-network and neutron-sriov services should be added before the libvirt and nova (or nova-custom-sriov in this case) services. It configures EDPM nodes with SRIOV.

When the nova-custom-sriov service Ansible job runs, it will copy overrides from the ConfigMaps onto the Nova hosts.

Create the OpenStackDataPlaneNodeSet

Create the CR from your directory based on the example dataplane_v1beta1_openstackdataplanenodeset_sriov with the changes described in the previous section.

oc kustomize --load-restrictor LoadRestrictionsNone config/samples/dataplane/sriov > dataplane_cr.yaml

Create a OpenStackDataPlaneDeployment

Creating an OpenStackDataPlaneDeployment will trigger Ansible jobs to configure an EDPM. Which Ansible roles are run depends on the services list.

Each OpenStackDataPlaneDeployment can have its own servicesOverride list which will redefine the list of services of an any OpenStackDataPlaneNodeSet in the list for a deployment.

The example dataplane_v1beta1_openstackdataplanedeployment_sriov

Create the CR based on the example

oc kustomize --load-restrictor LoadRestrictionsNone config/samples/dataplane/sriov > dataplane_cr.yaml

Custom OpenStackDataPlaneService called nova-custom-sriov has been created as described in the documentation to configure OpenStack to use SRIOV. The nova-custom-sriov can be seen in the example and takes the place of the default nova OpenStackDataPlaneService. This custom service uses a ConfigMap called cpu-pinning-nova which ensures that the file 03-cpu-pinning-nova.conf is used by Nova.

Now that the nova-custom-sriov has been created, use the example dataplane_v1beta1_openstackdataplanedeployment_sriov to start the deployment.

oc kustomize --load-restrictor LoadRestrictionsNone config/samples/dataplane/sriov > dataplane_cr.yaml
oc create -f dataplane_cr.yaml

The SRIOV deployment should be complete after the Ansible jobs started from creating the above CR finish successfully.