Container Runtime: containerd and CRI Deep Dive
Overview Kubernetes v1.24 officially removed dockershim, meaning Docker Engine is no longer used as the K8s container runtime. Instead, CRI-compliant (Container Runtime Interface) runtimes are used, with containerd being the de facto standard choice. Many ops teams perceive containerd as merely a “Docker replacement,” but its architecture, image management, and CLI tools differ significantly from Docker. This article provides a deep dive into the CRI specification, containerd architecture, daily operations, and migration from Docker....