DevOps

What is Docker Images and Exaplin in 10 bullet lines?

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  • Docker image is a collection of files systems.
  • It will have a ROOT FS, USR FS, APP FS.
  • ONE Copy of Docker image get attached to each Container
  • From one Image – you can get multiple Container.
  • Docker uses storage drivers to store image layers, and to store data in the writable layer of a container. 
  • Docker image file systems strcutured in a layerd way.
  • All layers in a docker image is Read only.
  • All layers in an image is merged to one layer while creating the container. ( Union Mount)
  • Layer 0 have the root filesystem
  • Each layer in image will have 40 character length UUID generated by SHA 256 algorithm.