LASUG Online: Introduction to Docker and Docker Tools

Introduction to Docker
and Tools
VASILIY FOMICHEV
SOLUTIONSARCHITECT

LASUG ONLINE #1 @vasiliyfomichev2
VASILIY FOMICHEV
SOLUTIONARCHITECT
VERNDALE
• SitecoreTechnology MVP
• Technology enthusiast
• Passionate about innovation
• cmsbestpractices.com
https://www.linkedin.com/in/vasiliyfomichev
@vasiliyfomichev
INTRODUCTION

WHAT ARE WE LOOKING AT?
Today’s development model
What are “containers”
How can docker help in the sitecore world?
Demos
Ubuntu on Docker
Solr on Docker
Mongo on Docker
Docker Machine
Provision Digital Ocean Droplet
Provision AzureVM
Where is this headed?

WHAT’STHE PROBLEM?

LASUG ONLINE #1 @vasiliyfomichev
DEVOPS CHALLENGES
• Local environment setups are getting more complex
• Environment differences allow for bugs in
applications
• Manual setup it too complex and time consuming
• Human error
• Scalability issues on prem
• Inability to reproduce production environment locally
for debugging
• Inability to easily sync all Sitecore environments
• Lack of QA and other types of reproducibility

WHAT ARE “CONTAINERS”?

Before Container Standards

Shipping Containers Invented
https://en.wikipedia.org/wiki/Malcom_McLean
In 1956, most cargo was loaded and
unloaded by hand. Hand-loading a ship cost
$5.86 a ton.
Malcom McLean born in 1913 developed the
modern intermodal shipping container,
which revolutionized transport and
international trade.
McLean knew "A ship earns money only
when she's at sea," and based his business
on that efficiency.
Using containers, it cost only 16 cents a ton,
a 39-fold savings. Containerization also
greatly reduced the time to load and unload
ships, improving reliability.

Hosting Containers

Docker is growing (18,000% growth)

Enterprises Rapidly Adopting Docker
Small, 30%
Midsize, 15%
Large, 56%
Company Sizes Using Docker

Container !=VM
• VM’s
• Full instances of the entire OS
• Not easily multi-instanced ~SysPrep
• Containers
• Layered elements of the OS + Components
• Easily Duplicated, Start/Stop
• Lightweight OS (Tiny Core Linux &Windows Server Core)

How tiny is tiny?
• ~24MB download!Whaaaat?!
• Runs completely from RAM
• Minimal Requirements:
• 46MB of RAM
• i486DX CPU (introduced in 1989, 50MHz, 8KB cache)
• Recommended Requirements:
• 128MB+ of RAM
• Pentium 2 CPU
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Server Core Requirements
• Minimum Requirement:
• 256-512MB of RAM
• 1GHz (x86) or 1.4Ghz (x64)CPU
• Recommended
• 512MB+
• 2GHz+CPU
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Container Comparison
• Immutable infrastructure!
• Fast startup (lightning fast!)
• Portable & light-weight
• A unit of deployment
• Ease of creation
• Each container can become a portion of the entire
app
• May have multiple containers that make up one or more
than one app

Why Containers?
Developers
Enable ‘write-once, run-anywhere’ apps
Enables microservice architectures
Great for dev/test of apps and services
(thousands available from Docker)
Reproducibility
Operations
Portability, Portability, Portability
Standardized development, QA, and prod
environments
Abstract differences in OS distributions and
underlying infrastructure
Easily scale-up and scale-down in response to
changing business needs
DevOps

Hosting Containers
Locally with:
• Docker Toolbox (Linux)
• Hyper V (Windows)
Physical Servers
• Linux (Linux)
• Windows 2016 TP3
(Windows)
Clouds
• Azure (Linux & Windows)
• Digital Ocean (Linux)
• AWS (Linux)
• Google (Linux)
• Rackspace (Linux)
• …etc.
AzureOn Premises Service ProviderLocally

Docker Distribution

Dockerfile

Windows Server Containers
Creation, deployment, and management
Developers
Containers pushed to
central repository
Operations automates
deployment and
monitors deployed apps
from central repository
Operations collaborates with developers
to provide app metrics and insights
Developers update, iterate,
and deploy updated
containers

Infrastructure
Cloud On Premises Service Provider
Container Technologies
Container Management
PowerShell OthersDocker
Development
Environment
s
Others…

LASUG ONLINE #1 @vasiliyfomichevSUGCON NORTH AMERICA 24
SITECORE AND CONTAINERS

Mongo on docker
• Simple configuration
– Single instance
– Replica set (development)
• Scaled configuration
– Scale horizontally
– Sharding
– Replica sets

Solr on docker
• Simple configuration
– Single instance
– Solr Cloud (development)
• Scaled Configuration
– Scale horizontally
– Sharding
– Replica sets
– Cloud

Sitecore on Docker (coming!)
• SimpleConfiguration
– Single instance
– Scaled CD/CM environments (development)
• Scaled configuration
– Highly scaled infrastructure
– Load balanced server instances

Docker Hub
• Docker Hub
– Base repository
– Private vs Public
– Solr for Sitecore

Common questions

1. Docker client versus host
• Docker client is a command line interface (CLI) Docker
• Docker host is a Linux/Windows VM running Docker daemon
2. Docker Linux and Windows hosts
• You can only create the same container as the underlying host VM - Linux host = Linux containers
3. Docker Image vs Docker Container
• Image = The definition – literally a single file [My Website]
• Container – An instance of an image [3 instances of My Website]
4. Cloud Registry Service and Public Image Repos
• Unlimited public repos, one free private or buy private repos
• 50,000+ images - Wordpress, Nginx, Redis, MySQL, Logstash, and your images!
• Docker Trusted Registry – Dedicated registry application deployable on-premise or direct from Azure
Marketplace
5 common Docker questions

5 common Docker questions
5. Deployments replace instead of update
“Immutable infrastructure”
Website
Update your app using
Web Deploy or CI/CD
Docker
Replace running
containers using CI,
Don’t update the old
container

Complementary tools

Some Other Docker Concepts
Compose
Define and deploy a multi-container
application
Swarm
Pool of hosts treated as a single unit, control
over multi-container environments
Docker Machine
Create and manage Docker instances locally
and on the cloud.

Docker Compose Example

Docker Swarm
• Adds a collection of virtual machines into one logical
cluster.
• Same Docker API
• Elect a leader to receive commands and send to cluster
• Scheduler
• Constraints – set a label on a VM/Node so matching containers use that VM
(ex: region=us-west)
• Affinities – Filters for labels, image, containers
• ex: -e affinity:container==frontend)
• Various Strategies

Wrapping Up
• Containers Ease Development & Ops
• Force a conversation of scalable design
• Ease of movement (On Prem, AWS, Azure)
• Immutable Infrastructure
• Use Docker Hub repositories for base images
• Run Solr and Mongo in containers
• Run Sitecore in containers (coming soon) Really soon!

Thank you!
https://www.linkedin.com/in/vasiliyfomichev
@vasiliyfomichev
VASILIY FOMICHEV
http://www.cmsbestpractices.com
Special thanks to Steve Lasker, Microsoft

LASUG Online: Introduction to Docker and Docker Tools

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