Containers

Note

Main Components of Docker (in order):

• Dockerfile - A recipe that tells Docker how to build an image (OS or application).

• Docker Image - Built from a Dockerfile. - Can be distributed via a Docker image repository.

• Docker Container - Created from an image. - Runs the software that executes code and commands. - Has two states: Stopped and Running. - Modes of operation:

  • As a server that awaits requests.

  • Short life.

  • Long life.

Final takeaway: A Dockerfile defines how to build an image → an image becomes a container → the container runs the application.