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Everyone Loves Docker Containers

Before They Understand Docker

Containers

Alex Mang

Microsoft Azure MVP

KeyTicket Solutions

@mangalexandru

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WHAT IS DOCKER?

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• Code + Runtime + System

tools + System libs

in a single package

• Code runs the same, always,

regardless of environment

What Is Docker?

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Ligh

twei

ght • Shared kernel

• Layered filesytem O

pen •Runs both on

Linux and Windows

Secu

re •Apps are isolated from each other and the underlying infrastructure

Why Docker?

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• Developers can build apps in ANY LANGUAGE using ANY TOOLCHAIN

• Dockerized apps are portable

–They can run on your PC, on a colleague’s iMac, on QA servers running Ubuntu, in production VMs running RedHat

• There’s a “NuGet” for Docker with 13K+ apps to build upon

• Docker helps devs build and ship high-quality apps

Why Do Developers Like It?

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• Sysadmins use Docker to provide standardized environments for development, QA and production teams

• No more “works on my machine” finger-pointing

• With “Dockerized” apps, sysadmins abstract away differences in OS distributions and underlying infrastructure

• Workload deployment is not constrained by infrastructure technology

Why Do Sysadmins Like It?

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VMs vs. Docker

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Docker Architecture

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Docker Installation

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• docker (as a CLI)

• docker-Machine (as yet another CLI)

• docker

–Start, stop, kill etc. containers

• docker-machine

– Install and run Docker (engine!) on Mac and Windows

–Provision and manage multiple remote Docker hosts

Docker clients

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Two broad use cases:

1. ‘I want to use Docker on Mac or Windows’

2. ‘I want to use Docker on remote systems’

docker-machine

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• When people refer to Docker, they mean “Docker

Engine”

–Client-server application made up of a daemon, a REST

API and a CLI

–Docker Engine takes docker commands from the CLI

• Docker Machine is a tool for provisioning and

managing “Dockerized” hosts

–You use it to install Docker Engine locally or remotely

Docker Engine vs. Docker Machine

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USING DOCKER DEMO

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CONTAINERS ON AZURE

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Q & A

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Alex Mang@mangalexandru