For reproducibility, the Dockerfile should tag the desired release of the operating system.
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This layer is the least likely to change, and is normally the “bottom” layer. These images are normally named by OS and tagged by release: Most Docker images start from a base operating system, the most common are versions of Ubuntu, CentOS, or Debian. The following sections will cover each component, with a special emphasis on reproducible environments. Once the base image is saved, additional images could extend the base image by adding the top layers: The name and tags typically convey information about the image’s components and versions. This is drinking a pint from the batch of beer.īase images can be saved in a registry. Container - At a specific moment, you can start a container from the image, which amounts to running a process in the built environment.Registry - Stores built images, so that others can use them.
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Docker 101 for Data ScientistsĬomputing in containers can be compared to brewing and drinking a beer. Then they should focus on the layers required in an image for R. R users and admins should be familiar with four key concepts: Dockerfiles, Images, Registries, and Containers. This site focuses on how Docker relates to reproducible environments, specifically environments for R.