Explaination Of the Architecture

Docker

• An image is an executable package that includes everything needed to run an application–the code, a runtime, libraries, environment variables, and configuration files.

• A container is launched by running an image.

• A container is a runtime instance of an image–what the image becomes in memory when executed (that is, an image with state, or a user process).

Virtual Machine

• A virtual Machine is an image of operating system running on Hypervisor over host operating system.

Comparision Basis	Docker	Virtual machine
Architecture
Build	Only Binaries and libraries of OS over which services run	Image of the entire OS
Virtualization	OS level virtualization by abstracting user space	Hardware Virtualization
Processing boundaries	Container have private space for processing, can execute commands as root	Virtual Box have confined space for processing and can execue command as user
kernel boundaries	Container share host sytstem kernel	Virtual Box share host system kernel with Guest Operating System with Hypervisor