Docker Container Image

A Docker Container Image is a template (specified by a Dockerfile) that can be instantiated into a Docker container.

• AKA: Docker Container Template.
• Context:
  • It can (typically) be comprised of a series of Docker Image Layers (filesystem changes with a unique ID)
  • It can (typically) contains all the data and meta data needs to run its containers.
  • It can (typically) be immutable. Read-only template
  • It can be stored in a Docker Image Repository, such as: Docker HUB.
  • …
• Example(s):
  • a Spark Docker Image.
• See: Docker Platform, AWS ECS, Docker Daemon.

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References

2016b

• https://www.infoworld.com/article/3077875/containers-101-docker-fundamentals.html
  • QUOTE: ... Docker is both a development tool and a runtime environment. To understand Docker, we must first understand the concept of a Docker container image. A container always starts with an image and is considered an instantiation of that image. An image is a static specification of what the container should be in runtime, including the application code inside the container and runtime configuration settings. Docker images contain read-only layers, which means that once an image is created it is never modified. …

2016a

• https://play.google.com/store/apps/details?id=comnkawe.docker.tutoria
  • QUOTE: Docker Image - Is a template. Image contains all the data and meta data needed to run the contains are launched from the image.

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