What is Docker Images and Exaplin in 10 bullet lines?

DevOps
Posted on | by anil

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  1. Docker image is a collection of files systems
  2. A docker image acts as a blueprint for docker container.
  3. File systems are layered over each other
  4. Layer 0 must contain a root filesystem
  5. Each layer in image will have 40 character length UUID generated by SHA 256 algorithm.
  6. The topmost layer will have priority.
  7. All layers in a docker image is Read only.
  8. All layers in an image is combined to form a container.
  9. From one image multiple containers can be created.
  10. Each container will have a copy of image attached to it.