Content
Design Overview
Genius contains four main components:
- Interface Manager
- Tunnel Manager
- Aliveness Monitor
- ID-Manager
these modules are developed as karaf features which can be independently installed. However, there is some dependency among these modules. The diagram below provides a dependency relationship of these modules.
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the central/main component of Genius is the Interface Manager which uses other modules for its operations. All these modules expose Yang based API which can be used to configure/interact with these modules and fetch services provided by these modules. Thus all these modules can be used/configured by other ODL modules and can also be accessed via REST interface.
Following sections provide details about each of these components.
Interface Manager
The Interface Manager (IFM) uses an MD-SAL based architecture, where different software components operate on, and interact via a set of data-models. Interface manager defines configuration data-stores where other opendaylight modules can write interface configurations and register for services. These configuration data-stores can also be accessed by external entities through REST interface. IFM listens to changes in these config data-stores and accordingly programs the data-plane. Data in Configuration data-stores remains persistent across controller restarts.
Operational data like network state and other service specific operational data are stored in operational data-stores. Change in network state is updated in southbound interfaces (OFplugin, OVSDB) data-stores. IFM listens to these updates and accordingly updates its own operational data-stores. Operational data stores are cleaned up after a controller restart.
Additionally, IFM also provides a set of RPCs to access IFM data-stores and provide other useful information. Following figure presents different IFM data-stores and its interaction with other modules.
Follwoing diagram provides a toplevel architecture of Interface Manager.
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In addition to these datamodels, it also implements several RPCs for accessing interface operational data. Details of these datamodels and RPCs are described in following sections. Interface Manager also uses ODL Inventory and Topology datastores to retrive southbound configurations and events. As described above Interface Manager uses other Genius modules for its operations. It mainly interacts with following other modules-