Hybrid Cloud — On-Prem + Cloud (Kubernetes, Terraform, Vault, Prometheus, ArgoCD, Helm) overview

A hybrid infrastructure platform spanning on-premises data centers and cloud providers, unified through Kubernetes as the common orchestration layer. Terraform provisions cloud resources and network connectivity (VPNs, peering) between environments, while Helm charts and ArgoCD ensure identical application deployments across all clusters. Vault manages secrets, certificates, and dynamic credentials with a single policy engine spanning both environments. Prometheus federates metrics from all clusters into a central Grafana dashboard. Kustomize handles environment-specific overlays for on-prem hardware constraints versus cloud elasticity. The tradeoff is enormous operational complexity in maintaining network connectivity, certificate management, and consistent state across environments, but the pattern satisfies data sovereignty requirements and enables cloud-bursting for peak demand.