2.7. OpenStack Networking
2.7.1. QoS
Red Hat OpenStack Platform 8 introduces support for network quality-of-service (QoS) policies. These policies allow OpenStack administrators to offer varying service levels by applying rate limits to ingress and egress traffic for instances. Any traffic that exceeds the specified rate is consequently dropped.
2.7.2. Open vSwitch Update
Open vSwitch (OVS) has been updated to the upstream 2.4.0 release. This update includes a number of notable enhancements:
- Support for the Rapid Spanning Tree Protocol (IEEE 802.1D-2004), allowing faster convergence after topology changes.
- Optimized multicast efficiency with support for IP multicast snooping (IGMPv1, IGMPv2 and IGMPv3).
- Support for vhost-user, a QEMU feature that offers improved I/O efficiency between a guest and a user-space vSwitch.
- OVS version 2.4.0 also includes various performance and stability improvements.
For further details on Open vSwitch 2.4.0, see http://openvswitch.org/releases/NEWS-2.4.0
2.7.3. RBAC for Networks
Role-based Access Control (RBAC) policies in OpenStack Networking allows granular control over shared neutron networks. Previously, networks were shared either with all tenants, or not at all. OpenStack Networking now uses a RBAC table to control sharing of neutron networks between tenants, allowing an administrator to control which tenants are granted permission to attach instances to a network.
As a result, cloud administrators can remove the ability for some tenants to create networks, and can instead allow them to attach to pre-existing networks that correspond to their project.
As a result, cloud administrators can remove the ability for some tenants to create networks, and can instead allow them to attach to pre-existing networks that correspond to their project.
