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(: March 9, 2019)
In this tutorial, we will look at how you can configure your Windows server 2019 to run Docker containers. Docker has been a game changer in Applications containerization and the whole microservices design and deployment patterns. Docker makes it easy to build, ship and run images containing applications with their dependencies and avoid crazy dependency issues common with the use of Virtual Machines.
Docker engine is what powers docker containers. It was originally written for Linux but a lot of work has been done to enable Windows and macOS users to run Docker containers.
One pre-requisite is the installation of a Windows server. This can be on a Virtual Machine running on-premise, a Physical server deployment or a Cloud instance running in Azure. You can refer to our installation guide below.
Before you can use the Windows Containers to run multiple isolated applications your system, you’ll need to enable the containers feature and install Docker on Windows Server 2019.
The first step is to enable the Windows Server 2019 containers feature. Open PowerShell as Administrator.
Run the following commands.
Install-Module -Name DockerMsftProvider -Repository PSGallery -Force
This will install the Docker-Microsoft PackageManagement Provider from the PowerShell Gallery.
Sample output is as shown below:
once the Containers feature is enabled on Windows Server 2019, install the latest Docker Engine and Client by running the command below in your PowerShell session.
Install-Package -Name docker -ProviderName DockerMsftProvider
Agree to the installation using “Yes” or “Y” or “A” to Agree to all.
When the installation is complete, reboot the computer.
Installed Docker version can be checked with:
Administrator> Get-Package -Name Docker -ProviderName DockerMsftProvider
Name Version Source ProviderName
---- ------- ------ ------------
docker 18.09.2 DockerDefault DockerMsftProvider
The same can be achieved with the
docker --version command.
PS C:UsersAdministrator> docker version
API version: 1.39
Go version: go1.10.6
Git commit: 1ac774dfdd
error during connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.39/version: open //./pipe/docker_engine: The system cannot find the file specified. In the default daemon configuration on Windows, the docker client must be run elevated to connect. This error may also indicate that the docker daemon is not running.
Upgrade can be done anytime by running the following commands on PowerShell.
Install-Package -Name Docker -ProviderName DockerMsftProvider -Update -Force
Start Docker Daemon
After starting Docker Engine service, Download the pre-created .NET sample image from the Docker Hub registry:
docker pull microsoft/dotnet-samples:dotnetapp-nanoserver-1809
Then deploy a simple container running a .Net Hello World application.
docker run microsoft/dotnet-samples:dotnetapp-nanoserver-1809
The container will start, print the hello world message, and then exits.
Out of the box, Docker on Windows only run Windows container. To use Linux containers on Windows Server, you need to use the Docker Enterprise Edition Preview which includes a full LinuxKit system for running Docker Linux containers.
Uninstall your current Docker CE.
Uninstall-Package -Name docker -ProviderName DockerMSFTProvider
Enable Nested Virtualization if you’re running Docker Containers using Linux Virtual Machine running on Hyper-V.
Get-VM WinContainerHost | Set-VMProcessor -ExposeVirtualizationExtensions $true
Then install the current preview build of Docker EE.
Install-Package Docker -ProviderName DockerProvider -RequiredVersion preview
Enable LinuxKit system for running Linux containers
[Environment]::SetEnvironmentVariable("LCOW_SUPPORTED", "1", "Machine")
Restart Docker Service after the change.
Pull a test docker image.
> docker run -it --rm ubuntu /bin/bash
[email protected]:/# cat /etc/os-release
VERSION="18.04.1 LTS (Bionic Beaver)"
PRETTY_NAME="Ubuntu 18.04.1 LTS"
[email protected]:/# exit
To Switch back to running Windows containers, run:
[Environment]::SetEnvironmentVariable("LCOW_SUPPORTED", "$null", "Machine")
Enjoy running Linux and Windows containers on Windows Server 2019. Drop us a comment in case of any issues.