Multi-Tenant LMS Infrastructure Deployment Strategy

Design a Kubernetes-based multi-tenant learning management system architecture that ensures complete tenant isolation, scalable resource allocation, and zero-downtime upgrades. Create a detailed Terraform configuration that provisions separate namespaces for each educational institution, implements network policies preventing cross-tenant data leakage, and supports automatic horizontal scaling based on concurrent student sessions. Include robust monitoring with Prometheus metrics specifically tracking per-tenant resource consumption and performance indicators.