Data Center Virtualization with Open vSwitch
This content delves into the importance of extending networking into the virtualization layer, focusing on the design, applications, implementation, and evaluation of Open vSwitch. Motivations behind virtualization, challenges, and the design of Open vSwitch are explored in detail, providing insights into the evolving landscape of virtual environments and networking technologies.
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Presentation Transcript
Data Center Virtualization: Open vSwitch Hakim Weatherspoon Assistant Professor, Dept of Computer Science CS 5413: High Performance Systems and Networking November 10, 2014 Slides from ACM SIGCOMM Workshop on Hot Topics in Networking (HotNets) presentation of Extending networking into the virtualization layer
Goals for Today Extending networking into the virtualization layer B. Pfaff, J. Pettit, T. Koponen, K. Amidon, M. Casado, S. Shenker. ACM SIGCOMM Workshop on Hot Topics in Networking (HotNets), October 2009.
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Motivation Virtualization is pervasive At the time of writing in 2009: 12% of workloads were virtual Gartner predicted by 2013, 61% of workloads would be virtual Scott Shenker s talk: Virtual switches is more numerous than physical switches today Intel: All endhosts should be virtualized
Motivation Networking in virtual environments is important Clouds routinely host 40, 60, 120 or more virtual hosts per physical host 128VM s per host is more than 2 racks full of machines
Motivation Networking in virtual environments is different Challenges Scalability (105 VMs or much more) Isolation Mobility Conveniences Hypervisor info Introspection Leaf nodes
Motivation Networking in virtual environments is different Challenges Scalability (105 VMs or much more) Isolation Mobility Open vSwitch Distribute the Switch Conveniences Hypervisor info Introspection Leaf nodes Centralize Control Take Advantage
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Open vSwitch Control Plane/Controller/OpenFlow Configuration Connectivity Management creating switches, managing virtual interface (VIF) connectivity, and managing physical interface (PIF) connectivity for each connected VIF, a logical port is added to the switch Features VLAN, Port Mirroring, ACLs, NetFlow, Bonding, QoS, Anything* Data Plane/Forwarding/OpenFlow OpenFlow controller remotely controls forwarding table Defines how packets handled based on L2,L3,L4 headers
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Applications Distributed Switch Logical View VM 1 VM 2 VM n
Applications Distributed Switch Physical View VM 1 Logical View VM 2 VM 1 VM 2 VM host 1 VM n . . . Physical Switch VM n GRE VM host k Controller
Applications Extending the Data Center into the Cloud Managed Cloud VM 1 VM 2 GRE/ IPSEC/ SSL VM host 1 Customer Data Center . . . cloud access server VM n GRE VM host k Controller
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Evaluation Compare Open vSwitch to Linux Bridge Bandwidth Fast Path: > 1Gbps ovs-vswitchd: 100Mbps Controller: 10Mbps Latency Fast Path: < 1 us ovs-vswitchd: < 1 ms Controller: ms+ .
Evaluation Compare Open vSwitch to Linux Bridge Same performance as Linux bridge with same CPU
Outline Motivation Design Applications Implementation Evaluation Discussion/Future Work
Discussion/Future work Hardware acceleration in a virtual world? Netronome, VN-Tag, VEPA Performance, performance, performance Physical switches integration Upstream kernel integration Anything*
Before Next time Project Interim report Due Monday, November 24. And meet with groups, TA, and professor Fractus Upgrade: Should be back online Required review and reading for Friday, November 21 VirtualWires for Live Migrating Virtual Networks across Clouds, D. Williams, H. Jamjoom, Z. Jiang, and H. Weatherspoon. IBM Tech. Rep. RC25378, April 2013. http://domino.research.ibm.com/library/cyberdig.nsf/papers/FD9A14E59B1 38E7E85257B6000572CC3/$File/rc25378.pdf Check piazza: http://piazza.com/cornell/fall2014/cs5413 Check website for updated schedule
