Docker part 2

Architecture

• They are not mutually exclusive to VM’s
• Can be run inside of a VM on top of the OS or on top of the native OS

Basics

• Docker image
  • Snapshot of container. Blueprint of container.
• Docker container
  • Standard unit of encapsulation where the application resides
• Docker engine
  • Instantiates the Docker image, builds and runs the container
• Docker registry
  • Stateless server side application to store and distribute Docker images
• Docker machine
  • Installs the infrastructure for Docker engine to run on Docker host
• Docker swarm
  • Tool for managing clusters of Docker engines

• DockerFile
  • Defines the environment inside a container. Things like port mappings and runtime dependencies go here