GCP GitOps Lighthouse ⚓️

A production-ready GitOps pipeline demonstrating Infrastructure-as-Code (IaC) and Continuous Delivery on Google Cloud Platform.

2. System Architecture

This project implements a "Push-button" infrastructure and application lifecycle:

1. Infrastructure: Provisioned via Terraform (Compute Engine, VPC, Firewalls).
2. Orchestration: K3s (Lightweight Kubernetes) for container management.
3. Continuous Delivery: ArgoCD Core monitors a GitHub repository for declarative state.
4. Application: Scalable Nginx deployment exposed via NodePort.

3. Tech Stack

• Cloud: Google Cloud Platform (GCP)
• IaC: Terraform
• Kubernetes: K3s
• GitOps: ArgoCD Core
• Configuration: YAML / HCL

4. Key Achievements & Proof of Work

• Automated Scaling: Demonstrated GitOps by scaling from 1 to 3 replicas via Git commit, with ArgoCD reconciling the state in <60 seconds.
• Resource Optimization: Successfully migrated from e2-micro to e2-medium to resolve TLS handshake and memory thrashing issues.
• Security: Implemented Least Privilege firewall rules, specifically exposing port 30080 for application traffic.

5. How to View

The application is currently live at: http://<EXTERNAL_IP>:30080

Proof of Deployment

1. Application Accessibility

The Nginx web server is successfully exposed via a GCP Firewall rule and Kubernetes NodePort, reachable at the VM's public IP.

2. GitOps Reconciliation

ArgoCD Core successfully synchronized the desired state from GitHub. Note the Synced and Healthy status.

3. Declarative Scaling

By updating the replicas count in GitHub, the cluster automatically scaled to 3 pods without manual intervention.