Software Defined Networks (SDN) na przykładzie rozwiązania OpenContrail.
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The document discusses software-defined networking (SDN) and its implementation using OpenContrail in data center architectures, highlighting challenges and solutions for managing virtual networks. It details the architecture involving orchestration with OpenStack, central configuration, and the role of OpenFlow in enabling SDN. OpenContrail is presented as a scalable, fault-tolerant solution that integrates well with existing infrastructure and supports various networking standards.
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Software Defined Networks (SDN) na przykładzie rozwiązania OpenContrail.
- 1. So#ware Defined Networks using OpenContrail Kraków 2014
- 2. Outline • Why – Data-‐center architectures – Networking challenges • How – SDN – Cloud orchestraDon -‐ OpenStack – OpenContrail architecture • Discussion
- 3. Datacenter architecture server server server server server server server server server server server server Clos network
- 4. Rack, servers, VMs VM VM VM VM hypervisor VM VM VM VM hypervisor VM VM VM VM hypervisor Server rack To spine switch
- 5. ObservaDons • Majority of network endpoints are virtual • Network isolaDon between them has to be available • While using the same physical network
- 6. VLANs • VM’s interfaces placed on bridges – Each bridge for a virtual network • Difficult to manage • 4096 VLAN tags limit – Can be extended using Shortest Path Bridging • Physical switches has to contain the VN state
- 7. VM migraDon example VM1 VM2 Server 1 VM3 VM4 VM5 Server 2 VM6 VM7 VM8 Server 3 VM9 Physical switch Virtual networks: 1 2 3
- 8. VM migraDon example VM1 VM2 Server 1 VM3 VM4 VM5 Server 2 VM6 VM7 VM8 Server 3 VM9 Physical switch Virtual networks: 1 2 3 VM9 Payload Eth + VLAN tag + IP
- 9. VM migraDon example VM1 VM2 Server 1 VM3 VM4 VM5 Server 2 VM6 VM7 VM8 Server 3 VM9 Physical switch Virtual networks: 1 2 3 VM9 Payload Eth + VLAN tag + IP
- 10. Centralized configuraDon server server server server server server server server server server server server Lot of switches
- 11. Standardized APIs • Northbound API – Orchestrator – Custom applicaDons • Southbound API – Hardware switches – Hypervisor OS bridges/virtual switches
- 12. SDN • Centralized configuraDon • Standardized APIs – North-‐bound – South-‐bound • Flexible • Scalable
- 13. OpenFlow • Defines both northbound and southbound APIS • Assumes “dummy” cheap switches – Only forwarding tables – Managed via API by the controller • Considered the enabler of SDN – Not true actually
- 14. OpenFlow server server server OpenFlow hardware swithes VM VM VM VM In-‐hypervisor so#ware switch
- 15. Overlay networking • “Old” technology, new for data-‐centers • Physical underlay network – IP fabric – No tenant state • Virtual overlay network – Tenant state – Dynamic tunnels (MPLSoGRE, VXLAN, etc.)
- 16. VM migraDon example VM1 VM2 Server 1 VM3 VM4 VM5 Server 2 VM6 VM7 VM8 Server 3 VM9 Physical switch Virtual networks: 1 2 3 S3 VM9 Payload Physical network:
- 17. VM migraDon example VM1 VM2 Server 1 VM3 VM4 VM5 Server 2 VM6 VM7 VM8 Server 3 VM9 Physical switch Virtual networks: 1 2 3 S2 VM9 Payload Physical network:
- 18. OpenContrail • www.opencontrail.org • “Knowledge” about network only in the so#ware (vRouter) • Any switch works for IP fabric network – No configuraDon – Only speed majers – Low price • Standards-‐based (MPLS, BGP, VXLAN, etc.)
- 19. Cloud orchestraDon • OpenStack • “Massively scalable cloud operaDng system” • Aims to manage – Compute (Nova) – Storage (Swi#, Cinder) – Network (Neutron) • Separates configuraDon and compute nodes
- 20. SDN in cloud orchestraDon Source: www.opencontrail.org
- 21. Architecture overview Source: www.opencontrail.org
- 22. Compute node Source: www.opencontrail.org
- 23. vRouter forwarding plane Source: www.opencontrail.org
- 24. MPLSoGRE example Source: www.opencontrail.org
- 25. Controller node Source: www.opencontrail.org
- 26. ConfiguraDon node Source: www.opencontrail.org
- 27. AnalyDcs node Source: www.opencontrail.org
- 28. Network FuncDons VirtualizaDon • Chaining of service VM • Load balancer VM, DPI VM, Firewall, etc. • High level descripDon (snort lang) • allow any src-vn -> dst-vn svc-1, svc-2 Source: www.opencontrail.org
- 29. OpenContrail summary • High-‐level descripDon of networks – allow any src-‐vn -‐> dst-‐vn svc-‐1, svc-‐2 • Horizontally scalable • Fault tolerant • Works with exisDng equipment • Open sourced
- 30. AcDve development • Juniper – New virtual service offerings (NFV) – Other orchestrators (CloudStack) support – Performance improvements – Etc. • Semihalf – New plaoorm – FreeBSD – vRouter in user-‐space
- 31. Any quesDons?