SDN Controller Programming Guide

com.acme.myapp.ui.rs.MyAppResource

com.hp.sdn.rs.misc.AuthenticationHandler

com.hp.sdn.rs.misc.NotFoundErrorHandler

</param-value>

</init-param>

</servlet>

<servlet-mapping>

<servlet-name>GUI REST Services</servlet-name>

<url-pattern>/app/rs/*</url-pattern>

</servlet-mapping>

<filter-name>Token Authentication Filter</filter-name>

<filter-class>com.hp.sdn.rs.misc.TokenAuthFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>Token Authentication Filter</filter-name>

<url-pattern>/app/rs/*</url-pattern>

</filter-mapping>

</web-app>

Distributed HA Primitives

Introduction

In a network managed by a controller, controller itself stands out to be a single point of failure.

Controller failures can disrupt the entire network functionality. HP VAN SDN Controller HA

infrastructure provides various mechanisms that controller applications can make use of in

achieving active-active, active-standby HA paradigms and internode communication. HA infra

provides 2 services for the applications to develop HA aware controller modules.

 Controller Teaming

 HA service

Following figure describes the communication between the controller applications and the HP VAN

SDN Controller HA sub-systems. “App1 – 1” indicates instance of application 1 on controller

instance 1. Distributed services along with zookeeper, ensures the data synchronization across the

controller cluster nodes.