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page_title: PowerShell DSC Usage page_description: Using DSC to configure a new Docker host page_keywords: powershell, dsc, installation, usage, docker, documentation

Using PowerShell DSC

Windows PowerShell Desired State Configuration (DSC) is a configuration management tool that extends the existing functionality of Windows PowerShell. DSC uses a declarative syntax to define the state in which a target should be configured. More information about PowerShell DSC can be found at http://technet.microsoft.com/en-us/library/dn249912.aspx.

Requirements

To use this guide you'll need a Windows host with PowerShell v4.0 or newer.

The included DSC configuration script also uses the official PPA so only an Ubuntu target is supported. The Ubuntu target must already have the required OMI Server and PowerShell DSC for Linux providers installed. More information can be found at https://github.com/MSFTOSSMgmt/WPSDSCLinux. The source repository listed below also includes PowerShell DSC for Linux installation and init scripts along with more detailed installation information.

Installation

The DSC configuration example source is available in the following repository: https://github.com/anweiss/DockerClientDSC. It can be cloned with:

$ git clone https://github.com/anweiss/DockerClientDSC.git

Usage

The DSC configuration utilizes a set of shell scripts to determine whether or not the specified Docker components are configured on the target node(s). The source repository also includes a script (RunDockerClientConfig.ps1) that can be used to establish the required CIM session(s) and execute the Set-DscConfiguration cmdlet.

More detailed usage information can be found at https://github.com/anweiss/DockerClientDSC.

Run Configuration

The Docker installation configuration is equivalent to running:

apt-get install docker.io
ln -sf /usr/bin/docker.io /usr/local/bin/docker
sed -i '$acomplete -F _docker docker' /etc/bash_completion.d/docker.io

Ensure that your current working directory is set to the DockerClientDSC source and load the DockerClient configuration into the current PowerShell session

. .\DockerClient.ps1

Generate the required DSC configuration .mof file for the targeted node

DockerClient -Hostname "myhost"

A sample DSC configuration data file has also been included and can be modified and used in conjunction with or in place of the Hostname parameter:

DockerClient -ConfigurationData .\DockerConfigData.psd1

Start the configuration application process on the targeted node

.\RunDockerClientConfig.ps1 -Hostname "myhost"

The RunDockerClientConfig.ps1 script can also parse a DSC configuration data file and execute configurations against multiple nodes as such:

.\RunDockerClientConfig.ps1 -ConfigurationData .\DockerConfigData.psd1

Images

Image configuration is equivalent to running: docker pull [image].

Using the same Run Configuration steps defined above, execute DockerClient with the Image parameter:

DockerClient -Hostname "myhost" -Image node

The configuration process can be initiated as before:

.\RunDockerClientConfig.ps1 -Hostname "myhost"

Containers

Container configuration is equivalent to running: docker run -d --name="[containername]" [image] '[command]'.

Using the same Run Configuration steps defined above, execute DockerClient with the Image, ContainerName, and Command parameters:

DockerClient -Hostname "myhost" -Image node -ContainerName "helloworld" `
-Command 'echo "Hello World!"'