This article introduces four leading open‑source container platforms—Docker, Podman, Containerd, and CRI‑O—detailing their core features, architecture, and use‑case advantages, helping readers understand each product’s strengths and suitability for modern cloud‑native and micro‑service deployments.
This article explains the role of container runtimes, distinguishes low‑level, high‑level, and sandbox runtimes, and compares three major implementations—containerd, CRI‑O, and Docker—detailing their architecture, image handling, networking, storage, and integration with OCI specifications.
This article introduces several widely used container engines—including Docker, Podman, LXD, Containerd, and CRI‑O—explaining their core components, architectural differences, security features, and typical use cases for developers and operations teams.
This article explains the role of container runtimes, classifies them into low‑level, high‑level, and sandbox types, and details the architectures and key components of popular runtimes such as containerd, CRI‑O, and Docker, highlighting their interactions with OCI specifications and system resources.
This article outlines the architecture and functions of container runtimes, detailing low‑level, high‑level, and sandbox types, and compares major implementations such as runC, containerd, CRI‑O, and Docker, highlighting their components, image handling, networking, storage, and integration with Kubernetes.
This guide explains how Kubernetes signs container images, how to verify those signatures manually or with sigstore policy‑controller, and how CRI‑O in v1.28 can enforce signature policies natively, including configuration, command‑line usage, and handling of error cases.
After Kubernetes announced the deprecation of Docker in version 1.24, this article examines several Docker alternatives—containerd, Podman, LXC/LXD, rkt, OpenVZ, Singularity, and CRI‑O—detailing their core features and advantages over Docker for modern cloud‑native environments.
This guide explains why Kubernetes dropped dockershim, clarifies OCI and CRI standards, compares Docker, containerd and cri‑o runtimes, and provides a step‑by‑step procedure—including node draining, Docker removal, kernel tuning, cri‑o installation, kubelet reconfiguration, and verification—to successfully migrate a cluster from Docker to cri‑o before upgrading to version 1.24.
This article explains the key components and standards of the container ecosystem—including Docker, containerd, CRI‑O, OCI and runc—detailing how they interact, the role of the Container Runtime Interface, and why Docker is only a small part of a broader, interoperable cloud‑native landscape.
This article explains the evolution and inner workings of Kubernetes container runtimes, detailing the roles of CRI, OCI, Docker, containerd, CRI‑O, and strong‑isolation solutions like Kata, gVisor, and Firecracker, and why the default dockershim remains prevalent.
This article explains the evolution and inner workings of Kubernetes container runtimes, covering the classic Docker‑based flow, the roles of CRI, OCI, containerd, CRI‑O, and strong‑isolation solutions like Kata, gVisor, and Firecracker, while clarifying why the architecture became so layered.
Kubernetes has officially deprecated Docker support by removing the dockershim bridge, explaining that Docker lacks native CRI compliance, and recommends migrating to CRI‑compatible runtimes such as containerd or CRI‑O while clarifying the differences between CRI and OCI runtimes.
Kubernetes has removed Docker support by deprecating the dockershim bridge, urging users to adopt CRI‑compatible runtimes such as containerd or CRI‑O, and explaining the differences between CRI and OCI runtimes, their security implications, and migration recommendations.
Starting with version 1.20 Kubernetes deprecates Docker as a container runtime, but Docker images remain usable through CRI‑compatible runtimes like containerd or CRI‑O, so developers can keep building with Docker while clusters transition to supported runtimes with minimal disruption.
This article explains the origins and design of Kubernetes' Container Runtime Interface (CRI), how it abstracts container runtimes, details its lifecycle and streaming operations, reviews major implementations like CRI‑containerd and CRI‑O, and introduces essential debugging tools.
This article examines how Mirantis’ acquisition of Docker, the historical contributions of major vendors, and the development of container runtimes such as LXC, runc, CRI‑O, and containerd have shaped the modern cloud‑native ecosystem and OpenShift’s architecture.
