Zero-Trust Cloud Engineering: Hardening Multi-Tenant Kubernetes Clusters with eBPF and ArgoCD

Beyond Perimeter Security

Traditional network firewalls are insufficient for modern microservices architectures. A breach in a single staging container can allow lateral traversal across the entire VPC unless strict Zero-Trust boundaries are continuously enforced.

Core Infrastructure Pillars

• eBPF-Powered Telemetry: Using Cilium for kernel-space packet filtering and continuous observability without proxy overhead.
• Declarative GitOps: ArgoCD ensures all cluster manifests match version-controlled Git repositories with automated drift correction.
• Automated Secret Rotation: HashiCorp Vault injects ephemeral credentials that expire within minutes, eliminating hardcoded keys entirely.