DevOps

What is Docker Images?

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  • Docker image is a collection of files systems.
  • A docker image is a template for docker container.
  • One docker image can be used to create multiple containers
  • File systems are layered over each other
  • Layer 0 have the root filesystem
  • Each layer in image will have 40 character length UUID generated by SHA 256 algorithm.
  • All layers in a docker image is Read only.
  • All layers in an image is merged to one layer while creating the container..