About Me

DevOps@RajeshKumar.XYZ

Docker simplifies software

If you already know how to use software, then you already understand Docker

What are the biggest challenges you face using software?

dockerrun does all of this!

Challenges with Software Discovery

• Where?
  • App store
  • Package manager
  • Standalone website
• Metadata & stats
• Trust
  • http
  • Code itself
• Download availability
• Payment

Challenges with Software Installation

• Snowflakes
• Compatible? Cross-Platform?
  • OS, OS version/build, CPU arch
  • macOS Sierra 10.12 x64
  • Win10 Anniversary Edition x64
• Format
  • Source
  • Standalone executable
  • Executable + bundled libraries
  • Executable + shared libraries / runtime
• Installers, package
• managers, manual…
  • What did it install?!
• Updates (auto updaters) & uninstall
• Configuration Management nightmare

Challenges with Running Software

• Helpful documentation
• Where is it? PATH?
• Starting and stopping
• Service
• registration
• Licenses
• Installing and running dependencies
• Security & sandboxing
• Breaking changes
  • OS updates
  • Shared library updates

Installing Docker for Windows

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Docker simplifies software

Inverted learning

Use software without knowing how to set it up.

When ready, everything is consistently documented for you to learn how to set it up (Dockerfile).Inverted learning

Installing Docker on Windows Server

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Docker is a front end for running containers.

(for now)

Software Layers

Layer Reuse

Containers are lightning fast compared to VMs

Windows Container Types

Host or Container Host

The machine that you run containers upon.

Running Command Line Apps in Containers

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key takaways

Run Software with a Consistent Command

Share Host Files with Container Processes

Building Images to Host Web Sites

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Web Site Static Files

From Commands to Dockerfile

						
	dockerrun -d -p 8080:80 --name nginxnginx
	docker cp.\app\. nginx:/usr/share/nginx/html
	docker commit nginx solitaire:nginx
						
						

From Commands to Dockerfile

Dockerfile

						
	FROM nginx
	COPY app /usr/share/nginx/html
						
						

dockerbuild –t solitaire:nginx.

key takeaways

• Containers come from Images and Images come from Containers!
• Container Layer – read and write
• Dockerfile - script to build an image

Running Databases in Containers

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Docker Managed Data Volumes

key takeaways

• Two Volume Types
  • From host file system (bind-mount)
  • Managed volume
• Volumes
  • Bypass UnionFS
  • Independent lifespan
  • Not part of images!
• Read heavy data in images
• Write heavy data in volumes (DB)
  • Especially memory-mapped files

Composing Applications with docker-compose

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From Commands to docker-compose.yml

						  
dockerrun --name db`
	-d `
	-p 3306:3306 `
	-e MYSQL_ROOT_PASSWORD=my-secret-pw `
	-v db:/var/lib/mysql`
         mysql
dockerinspect db# extract ipaddress
dockerrun --name web `
	-d `
	-p 8080:80 `
	-e MY_DB_PORT=3306 `
	-e MY_DB_HOST=? `
	-v /my/php/app:/usr/share/nginx/html `
	nginx						  
						  
						

From Commands to docker-compose.yml

						  
dockerrun --name db-d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=my-secret-pw -v db:/var/lib/mysqlmysql
dockerinspect db# extract ipaddress
dockerrun --name web -d -p 8080:80 -e MY_DB_PORT=3306 -e MY_DB_HOST=? -v /my/php/app:/usr/share/nginx/html
nginx						  
						 
						

key takeaways

• Dockerfile: images
• docker-compose : containers (and more)
• User defined networks

questions?

THANKS!!!