Docker Overview

In this post, I will document the learning I had with Docker.

Container History

- Linux Containers

• Open VZ 
• Single patched linux kernal ability to use architecture kernel version of system for executing the container
• Linux V-Server
• Virtual Private Server implementation. Created for adding OS level virtualization to the linux kernel itself.

What's a Container?

• OS level Virtualization.
• Kernel of OS allowing multiple isolated user space instances instead of one. 
• Like real server from point of view of operator.

What is Docker?
Docker is an open-source project to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and tests on a laptop can run at scale, in production, on VMs, bare metal, OpenStack clusters, public clouds and more.

Technology behind Docker 

• Developed using Google's Go language
• with Linux kernel using cgroup & cnames (namespace)
• AUFS union filesystem
• LxC (Linux containers)

TB typed more...as i learn...

Android Layouts

In this blog post, i am documenting at high-level the leanings i had on the Android - Layout Types

• Linear Layout (Aligns its child elements in single direction one after another)
• Horizontal Layout
• Vertical Layout
• Relative Layout
• Align's child elements relative to its sibling or parent. Help to avoid nested linear layouts.
• Frame Layout (Allows child views to put on top of one another child views)
• Table Layout (Aligns elements in Row & Column format)

More TB typed...