This document compares light weight virtualization using Docker containers to heavy weight virtualization using VirtualBox virtual machines. Docker containers have smaller image sizes ranging from 1 MB to 200 MB compared to 100 MB to 4 GB for VirtualBox ISO images. Docker can create hundreds of containers in 1 GB of RAM, while VirtualBox can only create 1-2 virtual machines. Container boot time is less than 1 second versus 35 seconds for virtual machines. Storage needs and RAM usage are also significantly lower for Docker containers.

1. Docker Cluster
Vipin Gupta
BE,RHCSS,RHCE,CEH,CCNA,MCSE,MCSA
vipin2411@gmail.com
Mobile: 93563-10379
www.linuxexpert.in

2. Hypervisor Virtualization

3. Light Weight Virtualization (Docker) Vs Heavy
Weight Virtualization (Virtual Box)
Virtual Box Docker
Created machine are called VM Created machines are called containers
Virtual Machines are created using iso Containers are created using docker images
Size of iso is 100MB to 4 GB
(ubuntu 16.04 server iso 829 MB )
Size of docker image is 1 MB to 200MB.
(alpine image is roughly 3 MB, docker
ubuntu image is 130MB )
In 1 GB RAM spare for creating virtual
machine, then we will be able to create 1
VM or maximum 2.
In 1 GB RAM, we can create hundreds of
containers using docker.
Boot time 35 sec Boot time <1 sec
Storage 10 GB Storage 104 KB
RAM 1 GB RAM 568 KB
VM installation time 21 min Container creation time 19.4 sec

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YouTube Channel
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Course on Software Defined Networking (SDN) at UDEMY
https://www.udemy.com/sdn-made-simple/?couponCode=UNETLABS