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Chapter 10. Preparing network functions virtualization (NFV)
If you use network functions virtualization (NFV), you must complete some preparation for the overcloud upgrade.
10.1. Network functions virtualization (NFV) environment files
In a typical NFV-based environment, you can enable services such as the following:
- Single-root input/output virtualization (SR-IOV)
- Data Plane Development Kit (DPDK)
You do not require any specific reconfiguration to these services to accommodate the upgrade to Red Hat OpenStack Platform 17.1. However, ensure that the environment files that enable your NFV functionality meet the following requirements:
The default environment files to enable NFV features are located in the
environments/servicesdirectory of the Red Hat OpenStack Platform 17.1openstack-tripleo-heat-templatescollection. If you include the default NFV environment files fromopenstack-tripleo-heat-templateswith your Red Hat OpenStack Platform 16.2 deployment, verify the correct environment file location for the respective feature in Red Hat OpenStack Platform 17.1:-
Open vSwitch (OVS) networking and SR-IOV:
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-sriov.yaml -
Open vSwitch (OVS) networking and DPDK:
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-ovs-dpdk.yaml -
Open Virtual Network (OVN) networking and SR-IOV:
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-ovn-sriov.yaml -
Open Virtual Network (OVN) networking and DPDK:
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-ovn-dpdk.yaml -
Open Virtual Network (OVN) networking with non-DVR and HA OVN DB:
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-ovn-ha.yaml
-
Open vSwitch (OVS) networking and SR-IOV:
-
To maintain OVS compatibility during the upgrade from Red Hat OpenStack Platform 16.2 to Red Hat OpenStack Platform 17.1, you must include the
/usr/share/openstack-tripleo-heat-templates/environments/services/neutron-ovs.yamlenvironment file. When running deployment and upgrade commands that involve environment files, you must include any NFV-related environment files after theneutron-ovs.yamlfile. For example, when runningopenstack overcloud upgrade preparewith OVS and NFV environment files, include the files in the following order: - The OVS environment file
- The SR-IOV environment file
The DPDK environment file
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There is a migration constraint for NFV workloads: you cannot live migrate instances from OVS-DPDK Compute nodes during an upgrade. Alternatively, you can cold migrate instances from OVS-DPDK Compute nodes during an upgrade.
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