Managed Clusters Aren't Set-and-Forget: 5 Production Pitfalls After Migrating from Self-Hosted K8s to ACK
Overview “Fully managed control plane” — this phrase makes many teams think migrating to an ACK managed cluster means they can kick back and relax. In reality, managed only takes care of etcd, kube-apiserver, kube-controller-manager, and kube-scheduler. Data plane problems? Still all yours. I led a migration of 120+ microservices from a self-hosted K8s cluster to ACK Managed Cluster Pro. The migration took 3 months with zero-downtime cutover — but the first month after switching, 3 AM alerts never stopped....