Chapter 2. Top New Features
This section provides an overview of the top new features in this release of Red Hat OpenStack Platform.
This section outlines the top new features for the Compute service.
- Tenant-isolated host aggregates using the Placement service
- You can use the Placement service to provide tenant isolation by creating host aggregates that only specific tenants can launch instances on. For more information, see Creating a tenant-isolated host aggregate.
- File-backed memory
- You can configure instances to use a local storage device as the memory backing device.
2.2. Distributed Compute Nodes (DCN)
This section outlines the top new features for Distributed Compute Nodes (DCN).
- Multi-stack for Distributed Compute Node (DCN)
- In Red Hat OpenStack Platform 16.1, you can partition a single overcloud deployment into multiple heat stacks in the undercloud to separate deployment and management operations within a DCN deployment. You can deploy and manage each site in a DCN deployment independently with a distinct heat stack.
This section outlines the top new features for the Networking service.
- HA support for the Load-balancing service (octavia)
- In Red Hat OpenStack Platform 16.1, you can make Load-balancing service (octavia) instances highly available when you implement an active-standby topology and use the amphora provider driver. For more information, see Enabling Amphora active-standby topology in the Networking Guide.
- Load-balancing service (octavia) support for UDP traffic
- You can use the Red Hat OpenStack Platform Load-balancing service (octavia) to balance network traffic on UDP ports. For more information, see Creating a UDP load balancer with a health monitor in the Networking Guide.
- Routed provider networks
- Starting in Red Hat OpenStack Platform 16.1.1, you can deploy routed provider networks using the ML2/OVS or the SR-IOV mechanism drivers. Routed provider networks are common in edge distributed compute node (DCN) and spine-leaf routed data center deployments. They enable a single provider network to represent multiple layer 2 networks (broadcast domains) or network segments, permitting the operator to present only one network to users. For more information, see Deploying routed provider networks in the Networking Guide.
- SR-IOV with native OVN DHCP in ML2/OVN deployments
Starting in Red Hat OpenStack Platform 16.1.1, you can use SR-IOV with native OVN DHCP (no need for neutron DHCP) in ML2/OVN deployments.
This section outlines the top new features for the Storage service.
- Storage at the Edge with Distributed Compute Nodes (DCN)
In Red Hat OpenStack Platform 16.1, you can deploy storage at the edge with Distributed Compute Nodes. The following features have been added to support this architecture:
- Image Service (glance) multi-stores with RBD.
- Image Service multi-store image import tooling.
- Block Storage Service (cinder) A/A at the edge.
- Support for director deployments with multiple Ceph clusters.
- Support for Manila CephFS Native
- In Red Hat OpenStack Platform 16.1, the Shared Filesystems service (manila) fully supports the Native CephFS driver.
2.5. Bare Metal Service
This section outlines the top new features for the Bare Metal (ironic) service.
- Policy-based routing
With this enhancement, you can use policy-based routing for OpenStack nodes to configure multiple route tables and routing rules with
os-net-config. Policy-based routing uses route tables where, on a host with multiple links, you can send traffic through a particular interface depending on the source address. You can also define route rules for each interface.
2.6. Network Functions Virtualization
This section outlines the top new features for Network Functions Virtualization (NFV).
- Hyper-converged Infrastructure (HCI) deployments with OVS-DPDK
- Red Hat OpenStack Platform 16.1 includes support for hyper-coverged infrastructure (HCI) deployments with OVS-DPDK. In an HCI architecture, overcloud nodes with Compute and Ceph Storage services are co-located and configured for optimized resource usage.
- Open vSwitch (OVS) hardware offload with OVS-ML2
- In Red Hat OpenStack Platform 16.1, the OVS switching function has been offloaded to the SmartNIC hardware. This enhancement reduces the processing resources required, and accelerates the datapath. In Red Hat OpenStack Platform 16.1, this feature has graduated from Technology Preview and is now fully supported.
2.7. Technology Previews
This section provides an overview of the top new technology previews in this release of Red Hat OpenStack Platform..
For more information on the support scope for features marked as technology previews, see Technology Preview Features Support Scope.
- Persistent memory for instances
- As a cloud administrator, you can create and configure persistent memory name spaces on Compute nodes that have NVDIMM hardware. Your cloud users can use these nodes to create instances that use the persistent memory name spaces to provide vPMEM.
- Memory encryption for instances
- As a cloud administrator, you can now configure SEV-capable Compute nodes to provide cloud users the ability to create instances with memory encryption enabled. For more information, see Configuring SEV-capable Compute nodes to provide memory encryption for instances.
- Undercloud minion
This release contains the ability to install undercloud minions. An undercloud minion provides additional
ironic-conductorservices on a separate host. These additional services support the undercloud with orchestration and provisioning operations. The distribution of undercloud operations across multiple hosts provides more resources to run an overcloud deployment, which can result in potentially faster and larger deployments.
- Deploying bare metal over IPv6 with director
- If you have IPv6 nodes and infrastructure, you can configure the undercloud and the provisioning network to use IPv6 instead of IPv4 so that director can provision and deploy Red Hat OpenStack Platform onto IPv6 nodes. For more information, see Configuring the undercloud for bare metal provisioning over IPv6 and Configuring a custom IPv6 provisioning network.
- Nova-less provisioning
In Red Hat OpenStack Platform 16.1, you can separate the provisioning and deployment stages of your deployment into distinct steps:
Provision your bare metal nodes.
- Create a node definition file in yaml format.
- Run the provisioning command, including the node definition file.
Deploy your overcloud.
- Run the deployment command, including the heat environment file that the provisioning command generates.
The provisioning process provisions your nodes and generates a heat environment file that contains various node specifications, including node count, predictive node placement, custom images, and custom NICs. When you deploy your overcloud, include this file in the deployment command.
- OVN Load-balancing service (octavia) provider driver
The OVN Load-balancing service provider driver is an integration driver between load balancers provided by OVN and octavia. It supports basic load balancer functionalities and is based on Openflow rules.
The provider driver is automatically enabled in the Load-balancing service by director on OVN Neutron ML2 enabled deployments. There are no additional installation or configuration steps required. The Amphora provider driver remains enabled and is the default provider driver.