SONiC: Software for Open Networking in the...
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SONiC: Software for Open Networking in the Cloud Lihua Yuan Microsoft Azure Network Team for the SONiC Community
Transcript of SONiC: Software for Open Networking in the...
SONiC: Software for Open Networking in the Cloud
Lihua Yuan
Microsoft Azure Network Team
for
the SONiC Community
SONiC Community @ OCP Mar 2018
SONiC [Software For Open Networking in the Cloud]
SAI [Switch Abstraction Interface]
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SIC
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Microsoft Cloud Network - 15 Billion Dollar Bet
SONiC Is Powering Microsoft Cloud At Scale
T2-1-1 T2-1-2 T2-1-8
T3-1 T3-2 T3-3 T3-4
Tier 1 – Row Leaf
T2-4-1 T2-4-2 T2-4-4Tier 2 - Spine
T1-1 T1-8T1-7…
T1-2
… …
Tier 3 - Regional Spine
…
T1-1 T1-8T1-7…
T1-2 T1-1 T1-8T1-7…
T1-2
Tier 0 - Rack…
T0-1 T0-2 T0-20
Servers
…T0-1 T0-2 T0-20
…T0-1 T0-2 T0-20
SONIC SONIC SONIC SONIC SONIC SONIC SONIC SONIC SONIC SONIC SONIC SONIC
SONIC SONIC SONIC SONIC SONIC SONICSONIC SONIC SONIC
Servers Servers
Goals of SONiC
Faster
Technology
Evolution
Reduce
Operational
Burden
Open &
Modular
Software
Choices of Vendors & Platforms
Disaggregation with
SONiC
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
مرحبا 你好Aloha
BonjourHola
Hello
Network Applications Simple, consistent, and
stable network
application stack
Helps consume the
underlying complex,
heterogeneous hardware
easily and faster
Switch Abstraction Interface (SAI)
Network Applications
Switch Abstraction Interface
Network Applications
नमस्ते
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
create_router_interface
create_neighbor
create_next_hop
get_switch_attributecreate_host_interface
create_route
Port PortRIF RIFRouteNext Hop
Neigh
create_router_interface
get_switch_attributecreate_host_interface
• 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
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
Chassis Supplier
ASIC Supplier
Linux
OCP
Various
ASIC
Switch Hardware
TransceiverFan/Power/LED
Network Applications
ASIC SDK
SAI
Ker
nel
Use
r Sp
ace
Switch State Service
Network device drivers
netdevASIC PCI driver
HW Peripheral drivers
PAL - sysfs
Object Library
Linux
Switch State Service (SwSS)
APP DB
SAI DB Ob
ject
Lib
rary
w/
Red
isB
acke
nd
ASIC
SAI
Network Applications
SyncD
Orchestration Agent
SAI DB: persist SAI objects
App DB: persist App objects
DB backend: redis with object library
SyncD: sync SAI objects between software and hardware
Orchestration Agent: translation between apps and SAI objects, resolution of dependency and conflict
Key Goal: Evolve components independently
How SAI Objects are Stored in SAI Database
• APP DB:• Application oriented• Human readable
• SAI DB:• SAI oriented• Query-able and machine parse-able• Snapshot of the current SAI state
• APIs:• sai_create_api• sai_set_api• sai_get_api*• sai_remove_api
*Used only when querying ASIC settings and configurations
SAI DB
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KEY SAI_OBJECT_TYPE:SAI_OBJECT_IDSAI_OBJECT_ATTR
SAI_OBJECT_ATTR
SAI_OBJECT_ATTR
VALUE
VALUE
VALUE
SAI_OBJECT_TYPE_NEXT_HOP:00000001SAI_NEXT_HOP_ATTR_IP
SAI_NEXT_HOP_ATTR_TYPE
10.0.0.1
SAI_NEXT_HOP_IP
SAI DB
How Routing Works in SONiC
APP DB
SAI DB
SyncD
Orchestration Agent
ASIC
Transceivers
Host Intfnetdev
BGP Neighbor
ZebraBGPd
socket
SAI Route
SAI Redis
fpmsyncd
APP DB
SAI DB
SyncD
Orchestration Agent
ASIC
Transceivers
Host Intfnetdev
LACP Neighbor
teamD
socket
SAI lag
How LAG Works in SONiC
teamDnetdev
SAI Redis
teamsyncd
SONiC Containerization
• TEAMD
• LLDP
• BGP: Quagga or FRR
• SNMP: Net-SNMP + SNMP subagent
• DHCP Relay: isc dhcp
• Platform: sensors
• SWSS: switch state service
• DB: Redis
• Syncd: sairedis + syncd agent
LLDP SNMP BGP
DHCP TEAMD
SYNCD SWSS
Utility Platform
SONiC Base Image
Database
SONiC Containerization
Container Strength
• Clean isolation
• Easy deployment
• Transactional
• Run universal
SONiC Benefits
• Serviceability
• Extensibility
• Development agility
• Cross-platform
SONiC Containerization
Routing
LLDP SNMP
DHCP TEAMD
SYNCD SWSS
Utility Platform
SONiC Base Image
Database
Quagga
FRR
GoBGP
Arista BGP
• Components developed in different environments
• Source code may not be available
• Enables choices on a per-component basis
Hitless Upgrade Through Docker
SPINE SPINE SPINE
LEAF
SONiC
TOR TOR TOR
Server:SWARM
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• Cloud users demand zero-down time, but
• Security patches, bug fixes need to be rolled out in hours
• New features need to be rolled out in days
Before they fly the space shuttle ….
They practice all activities and test all equipment extensively in a high-fidelity simulators
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SONiC Container Soft Switch
CrystalNet: A high-fidelity, cloud-scale network emulator
• 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/
Open Invitation
