TropoMetrics Infrastructure Project

A full-semester IT infrastructure project - from enterprise network to cloud-native weather service, VoIP telephony, GitOps, and professional monitoring. Designed, built, tested, and demonstrated as a working production system.

Full documentation (EN/NL) · Weather service frontend · API Server · GitOps / ArgoCD · Network configs

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This GitHub organisation documents a semester-long infrastructure project completed by a team of four IT students at De Haagse Hogeschool. Over roughly four months, the team designed and delivered a fully functional enterprise IT environment from the ground up - covering multi-site Cisco networking, virtualisation, cloud-native application deployment, VoIP telephony, monitoring, and security.

The scope was deliberately broad: rather than specialising in one area, the team was required to integrate every layer of the stack - physical network design, hypervisor configuration, Kubernetes orchestration, GitOps pipelines, Active Directory, and a custom-built web application - into a single cohesive system that could be demonstrated live. Every component listed in this organisation is something the team built, configured, and validated themselves.

The project demonstrates practical, hands-on competency across network engineering, DevOps, Linux systems administration, and full-stack development - skills directly applicable to roles in infrastructure, cloud, and platform engineering.

TropoMetrics is a fictional international weather data company, used as the case study for a semester-spanning infrastructure project at De Haagse Hogeschool (Network Infrastructure Design). The assignment consisted of two equal parts:

1. Design and build an enterprise IT infrastructure for a company with offices in three countries (Delft, Aruba, and Melbourne) - from network topology and IP plan to Proxmox virtualisation and Active Directory.
2. Develop a custom weather service running on that infrastructure - a full-stack application with a React frontend, Node.js/Redis API, and Kubernetes deployment. Open-Meteo was used as the upstream weather data API, allowing the focus to remain on the infrastructure and architecture rather than data acquisition.

The project followed the Design Science Research (DSR) methodology and concluded with a live demonstration for assessors on 21 January 2026.

Hierarchical three-tier network across Delft, Aruba, and Melbourne:

• Dual-stack IPv4 + IPv6 · OSPF · BGP (AS 100 <-> ISP AS 110) · HSRP failover
• IPsec/GRE VPN tunnels between all sites · EtherChannel (LACP) uplinks
• VLAN segmentation: STAFFNET · CALCNET · INTRANET · DMZNET
• Layer 2 security: Port Security · DHCP Snooping · DAI · IP Source Guard · Blackhole VLANs

All services as VMs on a single physical Proxmox VE host, connected via a single Linux bridge (vmbr0) with VLAN trunk:

• look-at-this-weather - React 18 + TypeScript + Vite, real-time weather data, 7-day forecast, maritime overview, dark/light mode
• api-server - Node.js/Express caching proxy for Open-Meteo, Redis TTL caching (rate limiting prevention)
• Horizontal Pod Autoscaler - automatically scales from 2 to 10 replicas at 50% CPU
• ArgoCD GitOps - declarative, self-healing, fully automated

• IVR menu for routing inbound calls to departments
• SIP softphones · SIP desk phones · analogue phones via Grandstream ATA

• PRTG (on Windows Server) - SNMPv3 monitoring of all Cisco devices, servers, and service availability
• Prometheus + Grafana (standalone VM) - application and cluster metrics
• Alertmanager - alert routing from K3s

Cisco ISR 4331 (router/ZBF) · Active Directory + LDAP · 802.1X · SNMPv3 · SSH-only management · IPsec-encrypted inter-site traffic

Cisco IOS · Proxmox VE · K3s / Kubernetes · ArgoCD · GitHub Actions · Docker · MetalLB · Traefik · NPM Plus · PRTG · Prometheus · Grafana · Alertmanager · Windows Server AD · Issabel PBX · Grandstream ATA · Stalwart Mail · Zammad · React 18 · TypeScript · Node.js · Redis · Tailwind CSS

De Haagse Hogeschool · Network Infrastructure Design · September 2025 - January 2026 This project was carried out as a Proof of Concept in an educational context. Not all choices are intended for direct production deployment, but are technically sound and fully reproducible.