In an image reference, this is the part after the final colon, and it is often used for a version number or architecture variant, for example, ltsc2019 in /windows/servercore:ltsc2019. Tag - a reference to a specific image within a repository. In an image reference, the repository is the part before the final colon, for example, /windows/servercore in /windows/servercore:ltsc2019. Repository - a collection of images with the same name, labeled with tags to indicate the version or variant. A registry contains one or more repositories. This can be either public ( Docker Hub) or private ( Azure Container Registry).
Registry - a place where you store images. This file is used by the Docker CLI build command to build the image. An image is immutable once it has been created.ĭockerfile - a text document format that contains instructions for assembling a Docker image. An image is often based on another image, with some additional customization. Image - a package with all code and dependencies that serves as the blueprint for creating a container.
