Networking in virtual machines
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Brief introduction to virtualization and virtual networking. Summarize a paper, "Performance Measuring and Comparing of Virtual Machine Monitors", Embedded and Ubiquitous Computing, 2008. EUC '08. IEEE/IFIP International Conference.
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Networking in virtual machines
- 1. Networking in Virtual Machines Julie Kim kjulee114@gmail.com 2013-1st Internet Technology
- 2. Table of Contents • About Virtual Networking – Type of Virtual Environments • Basic concept of networking between VMs • System architecture of networking in VMs • Measurements • Entrepreneur Software 22013-06-07
- 4. Virtual Environment • Full Virtualization – a faithful emulation of hardware interfaces to guest OS – Cannot realize themselves living in VM – VMware, KVM, QEMU 4 http://www.iris.edu/media/newsletter/vol14/no2/leaner-greener-data-management-at-iris-dmc-the-journey-of-virtual-machine-consolidation/virtual_machine.png 2013-06-07
- 5. Virtual Environment • Para Virtualization – Abstract VM – Need hence guest OS for porting into VMs – Xen, Denali, User Mode Linux 5 http://lh4.ggpht.com/-jWWqyJvdmns/TsLt87haSbI/AAAAAAAAIB8/Q_kPFzH4Na0/image_thumb%25255B10%25255D.png?imgmax=800 2013-06-07
- 6. Virtual Environment • Hardware-assisted Virtualization – Remedy limitation of traditional x86 – Extending legacy processor’s architecture – Intel’s Vander pool Technology, AMD’s Pacifica 6http://www.desktop-virtualization.com/images/x86-hardware-virtualization.jpg2013-06-07
- 7. Virtual Network • virtual network – a computer network – at least in part, of virtual network links. – Virtual network link • Do not consist of a physical connection • between two computing devices • wired or wireless 72013-06-07
- 9. Networking • Logically connected to port of the virtual network • Packet routing from the virtual network adapter to the virtual port on the external virtual network Virtual Port Virtual PortVirtual Network 2013-06-07 9
- 10. Virtual network architecture Host Applications TCP/IP Application Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Networks Virtual Network Manager Network Driver Host network interface 2013-06-07 10
- 11. Type of virtual Networks • External virtual networks – Available to connect external network http://docs.oracle.com/cd/E19053-01/ldoms.mgr11/820-4913-10/figures/125990.jpg 2013-06-07 11
- 12. External virtual networks • At least two network adapters – Operating system to remote access – Dedicated to VMs – VMs and host OS binds to the virtual network adapter – Virtual network manager(ex. Virtual Network Service Protocol) bind to the physical network adapter 2013-06-07 12
- 13. Type of virtual Networks • Internal virtual networks – between VMs – hosted by the same host OS and machine – Not bound to a physical network adapter 2013-06-07 13 http://docs.oracle.com/cd/E19053-01/ldoms.mgr11/820-4913-10/figures/125990.jpg
- 14. Type of virtual Networks • Private virtual networks (Microsoft) – Host-Only Networking (VMware, Virtual Box) – Communicate between VMs ONLY – Isolated networking environment • Isolated test domain 2013-06-07 14 http://docs.oracle.com/cd/E19053-01/ldoms.mgr11/820-4913-10/figures/125990.jpg
- 15. Private virtual networks • Host-Only Networking • Build isolated virtual network • Clustering VMs – a Token ring or Non-Ethernet network http://www.vmware.com/support/ws55/doc/img/host-only_1.png2013-06-07 15
- 16. Virtual network architecture Host Applications TCP/IP Application Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Machines Virtual Network Adapter Application TCP/IP Virtual Networks Virtual Network Manager Network Driver Host network interface 2013-06-07 16
- 18. Points of Qualification • Difference characteristic between physical and virtual • Pros and Cons • Inter-network between VMs • Network between Host OS and Guest OSs • Performance measurement 2013-06-07 18
- 19. Test Environment • Dell OPTIPLEX 755 business machine • h 2.33GHz E6550 Intel Core2 DUO processor • 2GB DDR II 667 RAM • Seagate 160GB 7200 RPM SATA II disk • Linux 2.6.24.4(Fedora8) • Virtual machine monitor – Xen3.1 and KVM-60 • Guests OS – Fedora8 and Windows XP SP2 – 1.5G memory 192013-06-07
- 20. CPU performance • Xen is better than KVM overall • Considerable performance degradation • fork, exec, sh, pipe – Process creating and executing – Need to update HW page table – Trapped • Validated by Xen • Rebuild the shadow table and map to guest by KVM 2013-06-07 20
- 21. Storage performance • VT-d – Remapping hardware of DMA and IRQ – Guest OS can directly control IO – KVM • Virtual IO processing with QEMU • Simulate IO operation and ignore HW advantages • Xen and Dual CPU is better 212013-06-07
- 22. Conclusion • Virtual network is another SW layer support network components • It is influenced various points – CPU performance – File IO performance – Network environment • Performance improvement is challengeable yet 222013-06-07
- 23. Q&A 인터넷 기술-이미정 교수님 23
- 25. References • Virtual Networks – http://technet.microsoft.com/en-us/library/cc708389(v=ws.10).aspx – http://technet.microsoft.com/en-us/library/cc720344(v=ws.10).aspx • Host-only networking – http://www.vmware.com/support/ws55/doc/ws_net_configurations_hostonly.html • http://www.theregister.co.uk/2013/02/15/sdn_event/ • http://technology.automated.it/2013/02/14/dropsync-adds-two-way-syncing-of-dropbox-data- on-android/ • http://en.wikipedia.org/wiki/Virtual_network • Cisco virtual Multi-Tenant Data Center 2.2 Design Guide • http://en.community.dell.com/techcenter/networking/w/wiki/3489.dell-virtual-network- architecture.aspx • http://docwiki.cisco.com/wiki/Internetworking_Technology_Handbook • http://www.vmware.com/files/pdf/virtual_networking_concepts.pdf • http://technet.microsoft.com/en-us/library/bb740955.aspx • http://domino.watson.ibm.com/library/cyberdig.nsf/papers/3ADF4AD46CBB0E6B852576770056B8 48/$File/H-0269.pdf • Quality of service for networked virtual environments, Denis Gracanin, Yunxian Zhou, and Luiz A. DaSilva, Virginia Tech, Communications Magazine, July. 2004, IEEE, p.42-48 • Performance Measuring and Comparing of Virtual Machine Monitors, Embedded and Ubiquitous Computing, 2008. EUC '08. IEEE/IFIP International Conference on, p.381-386 252013-06-07