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Sonic: Software for Open Networking in the Cloud SONiC: Software for Open Networking in the Cloud Lihua Yuan Microsoft Azure Network Team for the SONiC Community SONiC Community @ OCP Mar 2018 Application & Management Application Management & SONiC [Software For Open Networking in the Cloud] Switch Platform Platform Switch SAI [Switch Abstraction Interface] Silicon/ASIC Microsoft Cloud Network - 15 Billion Dollar Bet SONiC Is Powering Microsoft Cloud At Scale Tier 3 - Regional Spine T3-1 T3-2 T3-3 T3-4 … … … Tier 2 - Spine T2-1-1 T2-1-2 T2-1-8 T2-4-1 T2-4-2 T2-4-4 … … … T1-1 T1-2 SONICT1-7 TSONIC1-8 T1-1 T1-2 T1-7 T1-8 Tier 1 – Row Leaf SONICT1-1 SONICT1-2 SONICT1-7 T1SONIC-8 SONIC SONIC SONIC SONIC SONIC SONIC … … … Tier 0 - Rack SONICT0-1 SONICT0-2 SONICT0-20 SONICT0-1 SONICT0-2 T0SONIC-20 SONICT0-1 SONICT0-2 SONICT0-20 Servers Servers Servers Goals of SONiC Faster Reduce Technology Operational Evolution Burden Disaggregation with SONiC Open & Choices of Vendors & Modular Platforms Software SONiC: Software for Open Networking in the Cloud • Switch Abstraction Interface (SAI) • Cross-ASIC portability • Modular Design with Switch State Service (SwSS) • Decoupling software components • Consistent application development model • Containerization of SONiC • Serviceability • Cross-platform portability • SONiC Operational Scenarios • Hitless upgrade • Network emulation with CrystalNet Switch Abstraction Interface (SAI) NetworkNetwork ApplicationsApplications Simple, consistent, and Network Applications stable network application stack Hello Switch Abstraction Interface Helps consume the underlying complex, heterogeneous hardware Hola Aloha easily and faster 你好 नम Bonjour مرحبا ते Switch Abstraction Interface • CRUD operation over extensible Entity/Attribute/Value data model • Reference data-plane behavior model supports various devices • Significant feature/partner growth since announcement in 2015 • https://github.com/opencomputeproject/SAI SAI Function Calls & Pipelines in SONiC • Register SAI APIs to achieve specific functions and control logging separately • Construct the right order to execute SAI function calls • Refer to SAI Pipelines to create the right packet action flow create_router_interface create_next_hop create_router_interface get_switch_attribute get_switch_attribute create_route create_neighbor create_host_interface create_host_interface Next Port RIF Route Neigh RIF Port Hop SONiC: Software for Open Networking in the Cloud • Switch Abstraction Interface (SAI) • Cross-ASIC portability • Modular Design with Switch State Service (SwSS) • Decoupling software components • Consistent application development model • Containerization of SONiC • Serviceability • Cross-platform portability • SONiC Operational Scenarios • Hitless upgrade • Network emulation with CrystalNet SONiC High Level Architecture Linux Network Applications Object Library Switch State Service SAI ASIC SDK User User Space PAL - sysfs netdev ASIC PCI driver Kernel HW Peripheral Network drivers device drivers Various OCP Chassis Switch Hardware Supplier ASIC Supplier Fan/Power/LED Transceiver ASIC Linux Switch State Service (SwSS) Network SAI DB: persist SAI objects Applications App DB: persist App objects DB backend: redis with object library APP SyncD: sync SAI objects between software and DB hardware Orchestration Agent Orchestration Agent: translation between apps and Backend Redis SAI objects, resolution of dependency and conflict SAI DB w/ Library Object Key Goal: Evolve components independently SyncD SAI ASIC How SAI Objects are Stored in SAI Database • APP DB: • Application oriented SAI DB • Human readable • SAI DB: • SAI oriented • Query-able and machine parse-able KEY SAI_OBJECT_TYPE:SAI_OBJECT_ID • Snapshot of the current SAI state SAI_OBJECT_ATTR VALUE SAI_OBJECT_ATTR VALUE • APIs: SAI_OBJECT_ATTR SAIVALUE DB • sai_create_api SAI_OBJECT_TYPE_NEXT_HOP:00000001 • sai_set_api SAI_NEXT_HOP_ATTR_IP 10.0.0.1 • sai_get_api* SAI_NEXT_HOP_ATTR_TYPE SAI_NEXT_HOP_IP • sai_remove_api *Used only when querying ASIC settings and configurations 13 How Routing Works in SONiC BGP BGPd Zebra fpmsyncd Neighbor APP DB Orchestration Agent SAI Redis SAI DB socket Host Intf SyncD netdev ASIC SAI Route Transceivers How LAG Works in SONiC LACP teamD teamsyncd Neighbor APP DB Orchestration Agent socket teamD SAI Redis SAI DB netdev Host Intf netdev SyncD ASIC SAI lag Transceivers SONiC Containerization • TEAMD LLDP SNMP BGP • LLDP • BGP: Quagga or FRR DHCP TEAMD • SNMP: Net-SNMP + SNMP subagent SYNCD SWSS Database • DHCP Relay: isc dhcp • Platform: sensors Utility Platform • SWSS: switch state service • DB: Redis • SONiC Base Image Syncd: sairedis + syncd agent SONiC Containerization Container Strength SONiC Benefits • Clean isolation • Serviceability • Easy deployment • Extensibility • Transactional • Development agility • Run universal • Cross-platform SONiC Containerization • Quagga Components developed in Routing different environments LLDP SNMP FRR • Source code may not be DHCP TEAMD available GoBGP Databa SYNCD SWSS se Arista • Enables choices on a per- Utility Platform BGP component basis SONiC Base Image Hitless Upgrade Through Docker • Cloud users demand zero-down time, but SPINE SPINE …… SPINE 1 2 1 • Security patches, bug LEAF 6 Server: fixes need to be rolled SONiC SWARM out in hours 1 2 1 6 • New features need to be TOR TOR …… TOR rolled out in days Before they fly the space shuttle …. They practice all activities and test all equipment extensively in a high-fidelity simulators CrystalNet: A high-fidelity, cloud-scale network emulator SONiC Container Soft Switch 25 Open Invitation • Inviting contributions in all areas • New ideas on white/open network devices • New features, applications and tools • Download it, Test, Deploy! Website: https://azure.github.io/SONiC/ Mailing list: [email protected] GitHub: https://github.com/Azure/SONiC Wiki: https://github.com/Azure/SONiC/wiki/ .
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