introduction to yang data models and their use in opendaylight: an overview
TRANSCRIPT
YANG in OpenDaylight
Giles Heron
Cisco Systems
Why NETCONF/YANG - Informational RFC 3535
• SNMP had failed
• For configuration, that is
• Extensive use in fault handling and monitoring
• CLI scripting
• “Market share” 70%+
Abstract
This document provides an overview of a workshop held by the Internet Architecture Board (IAB) on Network Management. The workshop was hosted by CNRI in Reston, VA, USA from June 4 thru June 6, 2002. The goal of the workshop was to continue the important dialogstarted between network operators and protocol developers, and to guide the IETFs focus on future work regarding network management.
configuration
Cost and
complexity • No well-defined protocols and
data-models
• Lack of atomicity
• Ordering problem
NETCONFManager
OSSNMSEMS
Implications of RFC3535 – Legacy Situation
Reduced
Cost and
complexity
Cost/
Value
NETCONFManager
OSSNMSEMS
Transactions
Models
Standardized Protocols
Implications of RFC3535, with transactions
What is a Data-Model? What is a Network Management Protocol?
• Data-Model
• A data-model explicitly and precisely determines the structure, syntax and semantics of the data…
• …that is externally visible
• Consistent and complete
• Protocol
• Remote primitives to view and manipulate the data
• Encoding of the data as defined by the data-model
Data-Model
Protocol
ODL
Transport
Remote
Operations
Mgmt
Services
Mgmt info
(encoding)
Mgmt info
(definition)
XML-encoded
content
YANG modules
NETCONF
operations
XML
RPC
TLS,
SSH
JSONJAVA
DTO
I2RS
?
HTTP
RESTCONF
TCP
YANG - NETCONF, RESTCONF, I2RS & IDL
Controller
MD-SAL Details
MD-SAL
Data StoreDOM BrokerBA-BI Connector
Mapping Service
Codec Registry
Schema Service
Codec Generator
Binding-Aware Broker
Binding-Aware to Binding-Independent Data Translation
Binding-Aware PluginBinding-Independent
Plugin/Client (Netconf/Restconf)
Forwarding Rules Manager, Stats Manager, BGP-LS/PCEP
External Clients
Building a Plugin/Application
ModelModel
Yang Model
Java API DefinitionJava API DefinitionGenerated API
Definition
Module Implementations
Yang Tools
“Plugin”OSGI Bundle
1
4
Generate APIs
Create Plugin BundleDeploy
MavenBuild Tools
Module ImplementationsPlugin source code
“API” OSGI Bundle
MavenBuild Tools
2
3
Create API Bundle
4
Deploy
Controller
Mounting YANG DatastoresOpenDaylight Controller Config
MD-SAL
NETCONF
NETCONF
• Mounted under e.g. http://localhost:8181/restconf/config/opendaylight-inventory:nodes/node/controller-config
• Data can be accessed using …/yang-ext:mount/…
• …/yang-ext:mount/config:modules is used to configure the various plug-ins
Config Store
RESTCONF
Mounting YANG DatastoresOpenDaylight NETCONF Node “Discovery”
MD-SAL
NETCONF
RESTCONF
Node Inventory
• Nodes added by POSTing to config:modules
• ODL connects to each node
• ODL learns capabilities (YANG modules) and stores to model cache
• Cache at ~/cache/schema. Filenames of form [email protected].
Model Cache
XR1 XR2 OpenWRT
Mounting YANG DatastoresOpenDaylight NETCONF Node Configuration
MD-SAL
NETCONF
RESTCONF
Node Inventory
• Nodes configured by POSTing or PUTting to e.g.:
• http://localhost:8181/restconf/config/opendaylight-inventory:nodes/node/XR2/yang-ext:mount/Cisco-IOS-XR-ifmgr-cfg:interface-configurations/interface-configuration/act/Loopback0/
• Can retrieve config (or operational stats) using GET
Model Cache
XR1 XR2 OpenWRT
NETCONF/YANG Usecase: MEF SCA-API Project
13
OpenDaylightsca-api-web
MD-SAL
NETCONF
<<REST>> SCA-API (LSO PRESTO)
mef-sca-model
XR EVPNXR l2vpn-pw NCS service modelOpenFlow
NSOOpenFlow
sca-api-provider
Service models
Technology models
Device models
Thank you
