Role of sdn controllers in open stack

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Role of SDN Controllers in OpenStack

Author/ Email: Vikram Choudhary (Huawei) Numan Siddique (RedHat)

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What’s there in the plate? Background preparation

SDN Controllers OpenStack Neutron

SDN Controller’s & Openstack: Big Picture SDN controller’s for Openstack

OpenDaylight OpenContrail Open Networking Operating System Many more…

How to become part of OpenStack? Q/A

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Background before deep dive

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What is a SDN Controller?

An SDN controller is an application in

software-defined networking (SDN)

that manages flow control to enable

intelligent networking.

SDN controllers are based on

protocols, such as OpenFlow, that

allow servers to tell switches where

to send packets.

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Word about OpenStack

o OpenStack can be considered to

be not one project but several,

consisting of compute, storage

and networking.

o All three platform components

are managed by a dashboard

Web application.

o Combined, they can provide a

complete cloud network

operating system.

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OpenStack module to talk about: Neutron

o Neutron was introduced to treat

networking as a separate service.

o Can run as an autonomous service,

exposes APIs with different

vendors, provides implementations

by appropriate extensions.

o In short, neutron is NOT SDN, but

in theory can transform anything

into SDN, Just provide a plug-in for

it.

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Big Picture

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SDN Controller and OpenStack

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OpenStack Neutron, with its plug-in architecture, provides the ability to integrate SDN

controllers into the OpenStack. provides centralized management, and facilitates the

network programmability using APIs.

OpenStack is relatively mature and is in use in production environments worldwide.

This enables organizations to take advantage of the network orchestration feature

without necessarily deploying a full-blown controller-led SDN solution.

Different integration options: Completely eliminate RPC communications between the Neutron server and agents on the

compute node, with the SDN controller being the sole entity managing the network.

SDN controller manages only the physical switches, and the virtual switches can

be managed from the Neutron server directly.

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SDN controller’s for Openstack

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OpenDaylight is integrated with Openstack via a Neutron plug-in.

Plug-in moves the complexity up the stack from OpenStack to OpenDaylight.

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Status in Openstack:

ODL ML2 driver available in Icehouse release

• Supports VXLAN and GRE • Devstack• Focus on core Neutron Functionality, still use DHCP, L3 Agents

ODL ML2 in Kilo (current) • Changed auth to basic auth • Vendor decomposition – networking-odl in OpenStack big tent • Added support for L3 Service, FWaaS, LBaaS

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The OpenContrail Controller is a logically centralized but physically distributed Software Defined Networking (SDN) controller that is responsible for providing

Management Control, and Analytics functions of the virtualized network.

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OpenContrail is integrated with Openstack via a Neutron plug-in.

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Status in Openstack:

ODL ML2 driver available

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A new carrier-grade SDN networkoperating system designed for

high availability performance scale-out.

Mission: “to produce the Open Source Network Operating System that will enable service providers to build realSoftware Defined Network”

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Status in Openstack:

Just arrived

Work in Progress o https://bugs.launchpad.net/networking-onos/+bug/1474240o https://github.com/openstack/networking-onos

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Inputs for new SDN controller’s for

joining the party!

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https://github.com/openstack/neutron/blob/master/doc/source/devref/sub_projects.rst

http://docs.openstack.org/infra/manual/creators.html#add-new-repository-to-the-governance-repository

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Keep the thinking Hat On, many more

to come!

Thanks