SMART: SDN Middlebox Architecture for Resilient Transfers

SMART is a research framework for achieving differentiated Quality of Service (QoS) in multi-tenant clouds using selective redundancy.

Key Features

• Selective Redundancy Algorithms: Adaptive logic for CLONE, DIVERT, and REPLICATE actions based on SLA soft-thresholds.
• Dynamic Breakpoint Discovery: Real-time identification of congestion points using ODL Operational Port Statistics.
• Schema-Agnostic AMQP Propagation: Integration with Messaging4Transport using Apache Qpid JMS and DOMDataBroker for high-performance, schema-agnostic flow management.
• SENDIM-Ready Verification: Seamless verification via unit tests and SENDIM-style Python emulation.

Project Structure

• api/: contains the YANG models (smart.yang) for flow data and policy definitions.
• impl/: The core implementation of SMART algorithms and ODL/AMQP integration.
• scripts/: SENDIM-style Python scripts for Mininet emulation and logic validation.

Build & Installation

Prerequisites

• Java 8 (for ODL Beryllium compatibility)
• Maven 3.8.7+
• Docker & Docker Compose

Build the Project

mvn clean install -DskipTests

Verification

Unit Tests

Run the logic verification tests:

mvn test -pl impl

SENDIM Emulation

Demonstrate the selective redundancy behavior:

python3 scripts/run_smart_emulation.py

Deployment with Docker

To simplify the setup of the AMQP broker and other dependencies, a docker-compose.yml is provided.

Start the AMQP Broker

The project requires an AMQP 1.0 compatible broker (e.g., Apache ActiveMQ).

docker-compose up -d

The ActiveMQ web console is available at http://localhost:8161 (default credentials: admin/admin).

OpenDaylight & Messaging4Transport Integration

SMART is designed to run as an OSGi bundle within the OpenDaylight (ODL) Beryllium environment.

Architecture Overview

• Messaging4Transport (M4T): Used as the transport layer for policy propagation. SMART components publish/subscribe to the smart/flow-updates AMQP topic.
• SDN Actuation: The RulesManager interacts with the ODL DOMDataBroker to perform schema-agnostic updates to the Operational Data Store.
• Congestion Detection: The BreakpointManager queries the ODL Inventory Operational Data for port statistics (bytes-transmitted, packets-received) to identify link saturation.

Configuration

The default broker URL is amqp://localhost:5672. This can be updated in SmartProvider or passed via ODL Configuration Subsystem.

Citing SMART

If you use SMART in your research, please cite the following papers:

• Kathiravelu, P. and Veiga, L., 2016, October. Selective Redundancy in Network-as-a-Service: Differentiated QoS in Multi-tenant Clouds. In OTM Confederated International Conferences "On the Move to Meaningful Internet Systems" (pp. 87-97). Cham: Springer International Publishing.

• Kathiravelu, P. and Veiga, L., 2017, May. SDN middlebox architecture for resilient transfers. In 2017 IFIP/IEEE Symposium on Integrated Network and Service Management (IM) (pp. 560-563). IEEE.