Debug School

Mohit Dubey
Mohit Dubey

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What is a docker image ?

  • Docker Image is a software package that contains everything to run an application.

  • Docker image has multiple filesystems called Layers .

  • Layers are stacked one over the other.

  • Every layer has a parent layer.

  • First layer is known as the base image .

  • Every layer has a merged & diff directory.

  • Merge directory is something that is attached for the user .

  • Every layer has a different SHA value .

  • If you stop the container the merge directory goes away.

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