National Logistics Corporation (NLC): Driving Reliability Across Remote Locations Through DevOps

On-Premises Infrastructure Case Study

Industry Logistics, Transportation, Supply Chain Management

Solution Distributed Terminal Operating System, Offline-First Architecture, Virtualized Infrastructure, DevOps Automation

Partner On-Premises Data Center with Distributed Remote Terminals

The Client

National Logistics Corporation (NLC) is Pakistan’s largest and premier multimodal logistics organization, delivering integrated solutions across road, rail, sea, and air transportation.

With extensive nationwide infrastructure spanning remote and geographically dispersed locations, NLC supports trade, economic development, and humanitarian missions through comprehensive transport services, construction operations, freight forwarding, warehousing, and supply chain management.

NLC required a robust Terminal Operating System (TOS) that could function across dozens of remote terminals nationwide, especially in areas with unreliable or intermittent internet connectivity. The solution needed to support offline operations at remote terminals while maintaining data synchronization with the centralized data center and while deployed on-premises for data sovereignty and security compliance.

Business Requirements & Challenges

As a defense organization with critical national security responsibilities, the client partnered with DPL to architect and deploy a secure, air-gapped containerized infrastructure. Key business challenges included:

1. Distributed Architecture for Remote Terminal Operations
With terminals located across Pakistan in remote areas with unreliable connectivity, the system required a distributed architecture where each terminal could operate completely independently. Remote locations needed full operational capability during network outages, including processing transactions, managing inventory, and generating reports. All while ensuring data consistency when connectivity resumed.

2. Offline-First Operations with Bi-Directional Sync
Remote terminals required the ability to function in complete offline mode for extended periods (days or weeks) without data loss or operational disruption. The architecture needed sophisticated bi-directional data synchronization using Oracle GoldenGate to replicate data between remote terminals and the central data center. That way, it can handle conflict resolution and ensure eventual consistency across the distributed system.

3. Fully Virtualized On-Premises Infrastructure
The solution required the complete virtualization of the entire infrastructure stack to optimize resource utilization, enable rapid provisioning, and support disaster recovery requirements. Using VMware vSphere, the environment needed to virtualize application servers, databases, networking, and storage
across both the central data center and remote terminal locations. As a result, it could provide hardware abstraction and improved operational efficiency.

4. Over-the-Air Updates and Automated Patching
Managing dozens of remote terminals required automated deployment capabilities for application updates, security patches, and configuration changes. That is, without manual intervention at each site. The system needed over-the-air (OTA) update mechanisms that could push updates to remote terminals, handle rollback scenarios, and verify successful deployment across the distributed fleet while ensuring coordination through centralized DevOps pipelines.

5. Centralized Identity and Access Management
With hundreds of users across remote locations, the platform required centralized authentication and authorization using Microsoft Active Directory integrated with the Terminal Operating System. The identity infrastructure needed to support offline authentication scenarios, role-based access control across terminals, and secure credential management while maintaining compliance with organizational security policies.

Business Impact and Considerations

Addressing these distributed infrastructure challenges was critical for NLC’s operational continuity and service delivery, especially since:

Network connectivity failures may cause complete operational shutdown at remote terminals
Manual update processes may lead to security vulnerabilities and version inconsistencies
Physical infrastructure limitations can prevent rapid scaling at new terminal locations
Data synchronization failures may result in inventory discrepancies and reporting errors
Inability to meet strict data residency requirements for on-premises deployment

On-Premises Distributed Architecture

DPL designed and implemented a sophisticated distributed TOS deployed entirely on-premises with a hub-and-spoke architecture. The solution leverages virtualization, offline-first design patterns, and automated DevOps practices to ensure continuous operations across geographically dispersed terminals.

1. Distributed Terminal Architecture with Offline Capability

Hub-and-spoke topology with central data center and autonomous remote terminal nodes
Each terminal runs complete application stack (.NET Core backend, React frontend, Oracle database)
Offline-first design for enabling full terminal functionality without central connectivity
Local data caching and queuing for transactions during connectivity outages
Automatic reconnection and data synchronization when connectivity resumes

2. Oracle GoldenGate for Real-Time Data Replication

Bi-directional data replication between central data center and remote terminals
Real-time change data capture (CDC) for transaction-level replication
Conflict detection and resolution using timestamp-based and business rule strategies
Data filtering and transformation during replication for terminal-specific datasets
Automatic checkpoint and recovery to enable resumption after network disruptions
Monitoring and alerting for replication lag and synchronization issues

3. VMware vSphere Virtualization Platform

Complete infrastructure virtualization across central and remote locations using VMware ESXi
vCenter Server managing VM lifecycle, resource allocation, and high availability
VM templates and cloning for rapid terminal provisioning and standardization
vMotion to enable live VM migration for maintenance without downtime
Distributed Resource Scheduler (DRS) for optimizing resource utilization across hosts
VM snapshots and backups for disaster recovery and rollback capabilities

4. Application Stack: .NET Core, React, Linux

.NET Core backend services to provide RESTful APIs and business logic tier
React frontend for delivering responsive single-page application (SPA) experience
Linux-based application servers (CentOS/RHEL) for providing stable, secure runtime environment
Nginx reverse proxy for load balancing and SSL/TLS termination
Systemd service management for application lifecycle and automatic restart
Containerization using Docker for consistent deployment across environments

5. Centralized Identity: Microsoft Active Directory

Microsoft Active Directory as centralized identity provider for authentication and authorization
LDAP integration with .NET Core application for seamless SSO experience
Group Policy enforcement for security policies and configuration management
Read-only Domain Controllers (RODC) deployed at remote terminals for offline authentication
Role-based access control (RBAC) mapped to AD security groups
Cached credentials to enable user authentication during central AD unavailability

6. DevOps Automation: Over-the-Air Updates

GitLab CI/CD pipelines for automating build, test, and deployment workflows
Ansible playbooks for orchestrating configuration management and application deployment
Over-the-air update mechanism to push updates to remote terminals via secure channels
Blue-green deployment strategy with automatic rollback on failure detection
Staged rollout approach for deploying to pilot terminals before fleet-wide updates
Automated security patching for OS and application dependencies
Health checks and monitoring verifying successful deployment across terminals

Application Layer

Database

Operating System

Virtualization

Identity Management

DevOps & Automation

Monitoring

Business Outcomes and Benefits

100% (unlimited duration)

Offline Operation Capability

< 4 hours (from 2 weeks)

Terminal Deployment Time

Real-time (< 5 second lag)

Data Synchronization

30 minutes OTA (from days)

Update Deployment Time

99.9% (per terminal)

System Availability

45% improvement via virtualization

Resource Utilization

10+ nationwide locations

Terminals Deployed

85% reduction (via automation)

Manual Intervention

Innovation as a Service

DPL delivers end-to-end cloud and DevOps services, helping organizations modernize their infrastructure, automate deployment pipelines, and accelerate software delivery with greater reliability, speed, and efficiency.

20+ Years

Delivering Innovation since 2003

500+

Projects Completed

Top 1%

Sourcing the Best Talent

Up to $20M USD

Projects Delivering Capability