Capsule multi-tenant Kubernetes isolation enforces hard tenant boundaries across three namespaces—acme-dev, acme-staging, and acme-prod—each with dedicated Deployments, Services, ConfigMaps, Secrets, and NetworkPolicies. The Capsule Tenant resource (acme-corp) anchors tenant governance through the API Server and etcd, assigning a ClusterRoleBinding to the Tenant Owner and applying default NetworkPolicies to deny cross-namespace traffic. Each namespace layer implements environment-specific controls: dev uses deny-all ingress, staging adds StatefulSet caching with PersistentVolumes and allow-internal rules, and prod layers HPA, Ingress with TLS termination, and restrict-prod NetworkPolicy. A CronJob-driven quota audit Job validates namespace provisioning and resource limits, ensuring multi-tenant compliance without cluster fragmentation. Fork this diagram to customize tenant quotas, RBAC scopes, or storage classes for your organization's isolation requirements.