sdn: network agility in the cloud
DESCRIPTION
A presentation on Software Defined Networking, its concepts and application in cloud computing. I gave this presentation at OSCON 2013 in Portland: http://www.oscon.com/oscon2013/public/schedule/detail/31391. It starts with an introduction about SDN and some key concepts from the whitepaper at the Open Networking Foundation (ONF), I explain how OpenFlow and SDN differ, openflow being a standard protocol to control network devices. I then go on to review the many controllers out there and introduce a few key ones like floodlight, opendaylight, nicira. I give an overview of SDN integration in cloudplatform; opennebula, openstack and cloudstack and then gave a quick demo of the OpenDayLight controller.TRANSCRIPT
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Sebastien Goasguen,
July 24th 2013
#OSCON @sebgoa
SDN: Adding Network Agility to the Cloud
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Outline
Introduction to SDN
Controllers and Switches
Quick start demo of OpenDaylight
SDN in Cloud Platforms
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My SDN experience
~March 2012
Elastic IP and Security Group in Opennebula
Using NOX Open flow controller
http://blog.opennebula.org/?p=2695http://code.google.com/p/onenox/
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My SDN experience
~Summer 2013
Google Summer of Code project
Xen/XCP support for native GRE controller in Apache CloudStack
http://ngtuna.blogspot.com
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Software Defined Networking
SDN: Adding Network Agility to the Cloud #oscon
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What is SDN ?
https://www.opennetworking.org/competition
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What is SDN ?
https://www.opennetworking.org/sdn-resources/sdn-library/whitepapers
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SDN:
A new network architecture that abstracts the physical network to provide:
• Automation• Dynamic provisioning
In order to enable business innovation
SDN: Adding Network Agility to the Cloud #oscon
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Why ?
Fair use of images
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Because
Fair use of images
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Architecture
https://www.opennetworking.org/sdn-resources/sdn-definition
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Software Defined Networking
• Enable innovation, experimentation, optimization and customization of networks
• Move control of the network to software. i.e Programmable network
• Virtualize the network• Beyond traditional network virtualization ala VPN and
VLAN• Enables overlays with control at the edges
• Existing Vendor-agnostic, standard protocol for control: OpenFlow
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OpenFlow
Leading SDN protocolDecouples control and data plane by giving a controller the ability to install flow rules on switches.Hardware or software switches can use OpenFlowSpec driven by ONF
• Google achieved 95% utilization of WAN backbone by using SDN
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OpenFlow ProtocolOpenFlow rules can drop, rewrite, forward packets
http://www.openflow.org/wp/documents/
SwitchPort
MACsrc
MACdst
Ethtype
VLANID
IPSrc
IPDst
IPProt
TCPsport
TCPdport
Rule Action Stats
1. Forward packet to port(s)2. Encapsulate and forward to controller3. Drop packet4. Send to normal processing pipeline
Packet + byte counters
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OF scalability ?
• Central Logical controller not a single point of failure
• ONOS to be Open Sourced in the ~fall
• Scale-out design, availability
• Cassandra + message bus
http://onlab.us/tools.html
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“SDN” Timeline
Feb 2011: OF v 1.1
Dec 2011: OF v 1.2
Feb 2012: Floodlight project
April 2012: ONF talk by Google
July 2012: Vmware acquires Nicira
April 2013: OpenDayLight
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GENI
http://www.geni.nethttp://www.openflow.org/wp/tag/demo/http://groups.geni.net/geni/wiki/GENIRacksHome
“GENI is a virtual laboratory at the frontiers of network science and engineering for exploring future internets at scale. GENI creates major opportunities to understand, innovate and transform global networks and their interactions with society.”
Dec 2008: VM Mobility June 2010: Aster*x Load Balancing
~ 2011: GENI Racks2009: FlowVisor
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Controllers and Switches
SDN: Adding Network Agility to the Cloud #oscon
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OF Controllers and more …• Several controllers out there (NOX,
POX,Trema, Beacon…)
http://yuba.stanford.edu/~casado/of-sw.htmlhttps://networkheresy.com
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OpenVSwitch
“Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license. It is designed to enable the massive network automation through programmatic extension…”
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e.g OVS rate limiting
Can enforce QoS with rate limiting controlsovs-vsctl set Interface tap0 ingress_policing_rate=1000ovs-vsctl set Interface tap0 ingress_policing_burst=100
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e.g OVS VLAN tagging
ovs-vsctl add-br br0ovs-vsctl add-port br0 eth0ovs-vsctl add-port br0 tap0 tag=1ovs-vsctl add-port br0 tap1 tag=2
Complement on host2…
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e.g OVS and GRE tunnels
No Cookbook on OVS pageovs-vsctl add-port br1 gre1 -- set interface gre1 type=gre options:remote_ip=192.168.1.152
http://blog.scottlowe.org/2013/05/07/using-gre-tunnels-with-open-vswitch/
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OVS and Openflow
Point OVS switches to an OF controller:$ovs_vsctl set-controller br0 tcp 192.168.1.33:6633
Install rules on switch• Proactively (before any packet flows)• Reactively (unknown packets forwarded to
controller, who pushes flow mod on switch, then operates at line rate)
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Switch Light, Indigo (IVS)
http://www.projectfloodlight.org/indigo/
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OpenDaylight
http://www.opendaylight.org
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OpenDaylight Demo ?
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SDN in Cloud Platforms
SDN: Adding Network Agility to the Cloud #oscon
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OpenNebulaSupports VLAN tagging and rate limiting through “hooks” that call ovs_vsctlScripts executed on an hypervisor before a VM is launchedPotentially also executed after VM shutdown for cleanupAlso supports OpenFlow
http://opennebula.org/documentation:rel4.0:vgg
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Quantum == Neutron
https://wiki.openstack.org/wiki/NeutronThanks to @hui_kenneth for diagram
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Quantum == Neutron
https://wiki.openstack.org/wiki/Neutron
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CloudStack Network API
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CloudStack Nicira NVP Support
By Hugo Trippaers @Spark404, Schuberg PhilisIsolated Networks in advanced Zone 4.0+L3 functionalities in 4.2
http://www.youtube.com/watch?v=F-FgHni7W34
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CloudStack + Nicira NVP
Insert Presentation Title Here
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CloudStack SDN Plugins
Thanks to @spark404 for table
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Conclusions• Network abstractions to decouple from the
physical network is the last leg of Cloud• SDN provides an architecture to abstract the
network• OpenFlow is a standard that can be used to
create SDN implementations• SDN is key to innovation in networking• The Open Cloud Platforms are embracing SDN
solutions as network providers for multi-tenancy
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Get Involved with Apache CloudStack
Web: http://cloudstack.apache.org/
Mailing Lists: cloudstack.apache.org/mailing-lists.html
IRC: irc.freenode.net: 6667 #cloudstack
Twitter: @cloudstack
LinkedIn: www.linkedin.com/groups/CloudStack-Users-Group-3144859
If it didn’t happen on the mailing list, it didn’t happen.