Chapter 2. Top New Features

This section provides an overview of the top new features in this release of Red Hat OpenStack Platform.

2.1. Red Hat OpenStack Platform Director

This section outlines the top new features for the director.
Changes to OpenStack Telemetry (ceilometer) on Overcloud Deployments
Overcloud deployed with Red Hat OpenStack Platform 9 director now use new components for OpenStack Telemetry Metrics (gnocchi) and OpenStack Telemetry Alarming (aodh).
Changes to OpenStack Identity (keystone) on Overcloud Deployments
Overcloud deployed with Red Hat OpenStack Platform 9 director now configures OpenStack Identity (keystone) as a WSGI application under `httpd` instead of a standalone service. This change aims to enhance the security of the service.
OpenStack Clustering (sahara) included in Overcloud Deployments
Overcloud deployed with Red Hat OpenStack Platform 9 director now includes OpenStack Clustering (sahara).
Upgrade Overcloud from Red Hat OpenStack Platform 8 to 9
The Red Hat OpenStack Platform director provides the ability to upgrade your Overcloud to Red Hat OpenStack Platform 9. This includes installing new components such as OpenStack Telemetry Metrics (gnocchi), OpenStack Telemetry Alarming (aodh), and OpenStack Clustering (sahara). The upgrade process also modifies the OpenStack Identity (keystone) service to run as a WSGI application under `httpd` instead of a standalone service.
Backwards Compatibility for Red Hat OpenStack 8 Overclouds
The Red Hat OpenStack Platform 9 director can manage Overclouds that use Red Hat OpenStack Platform 8. This means you can upgrade the Undercloud host to the latest version and still manage an Overcloud of the previous version. This helps support the lifecycle for the director, which is shorter than the lifecycle of the core Red Hat OpenStack Platform product.