Kubernetes Multi-Tenancy: Namespace Isolation, RBAC, and Network Policies Explained Most teams running shared Kubernetes clusters believe they have isolation. They have namespaces. They have different teams deploying to different namespaces. It feels like separation. It is not. Kubernetes was designed as a single-tenant system. Multi-tenancy is not a built-in feature. It is a property you constr
At 3:17 AM on a Tuesday in Q3 2024, our production Kotlin 2.0 microservice fleet hit a 92% memory utilization threshold across 140 nodes, traced to a silent coroutine leak in Ktor 2.2’s request pipeline that had been bleeding 12MB of heap per second for 72 hours. We lost $14k in SLO credits before we found the root cause. A Couple Million Lines of Haskell: Production Engineering at Mercury (78 p