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For more than one year Windows developers can hear about Docker stuff. But after few sentences how docker is great there is one important sentence:

 

 

Nowadays we can run only docker containers on Linux. There is no way to run Windows containers.

or

Docker Engine for Windows Server requires Windows Server 2016. You can try Preview to test it.

Few days ago above statements outdated. Are you ready to run it on your Windows 10?

 

Prerequisites

To have fun with Windows containers you need Windows 10 Insider Preview. I describe how to get it in How to setup Bash and Ubuntu on Windows - step by step guide 
After you have it check out if you already install version 14352 or greater.

The second way is to install Windows Server 2016 technical preview - as I remember from version 4 containers are available.

Having one of above versions we are ready to deploy a simple Hyper-V container.

 

Small tip before we start

Most commands we will run in elevated PowerShell. I usually, forget to run it. But few months ago I described how to run sudo command in Windows. Using sudo I can run sudo powershell and use up arrowto rerun command as admin. 

 

Enable Hyper-v and containers feature

If you didn't play with Hyper-v on your machine before, this step is most complicated. 
To enable Hyper-v in modern laptops usually we have to access BIOS. For example in Lenovo, I have to find a special hidden button to enter BIOS. Tricky!

When you are ready, start PowerShell as Administrator and run:

Enable-WindowsOptionalFeature -Online -FeatureName containers –All  
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V –All  

The first command will install containers feature and the second Hyper-v stuff. 
Now reboot if needed :)

 

Install docker

Containers needs docker. To install it we can run following commands:

$dockerDir = "$env:ProgramFiles\docker\"
New-Item -Type Directory -Path "$dockerDir\docker\"  
Invoke-WebRequest https://aka.ms/tp5/b/dockerd -OutFile $dockerDir\dockerd.exe  
Invoke-WebRequest https://aka.ms/tp5/b/docker -OutFile $env:ProgramFiles\docker\docker.exe

[Environment]::SetEnvironmentVariable("Path", $env:Path + ";$dockerDir\Docker", [EnvironmentVariableTarget]::Machine)
$env:Path = $env:Path + ";$dockerDir\Docker"

First three lines will download "special" docker. 
Last two commands will add docker path for future and current session use.

Now we can install docker as a service (maybe DaaS will be next famous shortcut?) and start it:

dockerd --register-service  
Start-Service Docker 

 

Base image - NanoServer

We are ready now to install base container image: NanoServer. NanoServer is the "smallest" version on Windows Server 2016. It doesn't have GUI :) 
Few simple commands and we are ready:

Install-PackageProvider ContainerImage -Force  
Install-ContainerImage -Name NanoServer  
Restart-Service docker  

Attention: If you have a problem with running commands run Set-ExecutionPolicy Bypass -scope Process to change execution policy in current PowerShell process.

To check if everything is OK, invoke:

docker images  

you should see something like:

REPOSITORY   TAG              IMAGE ID      CREATED      SIZE  
nanoserver   10.0.14300.1010  9db95268a387  9 weeks ago  817.1 MB  

 

Deploy

Now we are ready to deploy container. At first, we need to mark our image as latest using:

docker tag nanoserver:10.0.14300.1010 nanoserver:latest  

And our final commands are:

docker pull microsoft/sample-dotnet  
docker run --isolation=hyperv --rm microsoft/sample-dotnet  

Hurrah, we just run our first container. To be sure that we are running Windows not Linux try another one:

docker run --isolation=hyperv --rm  -it nanoserver powershell  

Which will run powershell on NanoServer image. For example use lsand find out what directories you have on Nano Server

 

What's next?

Next time I will show how to deploy normal IIS and old .NET version (like 3.5 or 4.5) on docker images. Follow me on twitter, facebook or RRS. 
Stay tuned!

 

 

 Piotr - IT Expert at mBank S.A.