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Registries: A Docker registry is a repository for Docker images. Docker clients connect to registries to download ("pull") images for use or upload ("push") images that they have built. Registries can be public or private. The main public registry is Docker Hub. Docker Hub is the default registry where Docker looks for images.
Docker, Inc. is an American technology company that develops productivity tools built around Docker, which automates the deployment of code inside software containers. [1] [2] Major commercial products of the company are Docker Hub, a central repository of containers, and Docker Desktop, a GUI application for Windows and Mac to manage containers.
The image-spec is a software shipping container image format spec (OCI Image Format) that reached version 1.0.0 on July 19, 2017. [ 12 ] The OCI Distribution Spec Project defines the distribution-spec, an API protocol to facilitate and standardize the distribution of content.
In software engineering, containerization is operating-system–level virtualization or application-level virtualization over multiple network resources so that software applications can run in isolated user spaces called containers in any cloud or non-cloud environment, regardless of type or vendor. [1]
In computing, Podman (pod manager) is an open source Open Container Initiative (OCI)-compliant [2] container management tool from Red Hat used for handling containers, images, volumes, and pods on the Linux operating system, [3] with support for macOS and Microsoft Windows via a virtual machine. [4]
Originally, kubelet interfaced exclusively with the Docker runtime [48] through a "dockershim". However, from November 2020 [49] up to April 2022, Kubernetes has deprecated the shim in favor of directly interfacing with the container through containerd, or replacing Docker with a runtime that is compliant with the Container Runtime Interface (CRI).
Singularity is a free and open-source computer program that performs operating-system-level virtualization also known as containerization. [4]One of the main uses of Singularity is to bring containers and reproducibility to scientific computing and the high-performance computing (HPC) world.
Docker, a project automating the deployment of applications inside software containers; Apache Mesos, a large-scale cluster management platform based on container isolation; Operating system-level virtualization implementations; Proxmox Virtual Environment, an open-source server virtualization management platform supporting LXC containers and KVM