How to create mofs from Configuration File and Configuration Data File

DSC
1

I have a configuration data file like data.psd1
@{
AllNodes = @(
@{
NodeName = “*”
LogPath = “C:\Logs”
},

    @{
        NodeName = "machine1";
        Roles = @( "SmtpRole", "WebRole" )
    },

    @{
        NodeName = "machine2";
        Roles = @( "SmtpRole" )
    }
)

}

I have a configuration like FarmConfiguration.ps1

Configuration FarmConfiguration {
Import-DscResource -ModuleName ‘PSDesiredStateConfiguration’
Import-DscResource -ModuleName ‘MyCustomDsc’

Node $AllNodes.NodeName
{
    SimpleTcpIpConfiguration SimpleTcpIp
    {
    }
}

Node $AllNodes.Where{$_.Roles -contains "WebRole"}.NodeName
{
    WebConfiguration Web
    {
    }
}

Node $AllNodes.Where{$_.Roles -contains "SmtpRole"}.NodeName
{
    SmtpConfiguration Smtp
    {
    }
}

}

I know if I add “FarmConfiguration-ConfigurationData ConfigurationData.psd1” to the bottom of my FarmConfiguration.ps1 file then everything works fine.

But this is a big problem I don’t want my FarmConfiguration to know about the data file at all, it’s check into source control.

I want to be able to creates MOFs based on various different data files how can I do this? Thanks.

2

I, too, am curious about the best way to do this.

3

Assuming you are in the same directory as where you files are placed

# Dot-source the PowerShell script holding your configuration
. .\FarmConfiguration.ps1

# Then your FarmConfiguration "function" is available for you to run, pointing to a data file of your choice
FarmConfiguration -ConfigurationData .\ConfigurationData.psd1
4

This is the first thing I tried and it did not work, I got no output nothing when trying this.

5

Okay I found out how to do what I’m asking.

For all practical purposes FarmConfiguration is a private function inside of the .ps1 file. So I updated FarmConfiguration.ps1 to the following.

param(
    [Parameter(Mandatory)]
    [string]$ConfigurationData
)

Configuration FarmConfiguration {
 Import-DscResource -ModuleName 'PSDesiredStateConfiguration'
 Import-DscResource -ModuleName 'MyCustomDsc'

  Node $AllNodes.NodeName
  {
     SimpleTcpIpConfiguration SimpleTcpIp
     {
     }
  }

  Node $AllNodes.Where{$_.Roles -contains "WebRole"}.NodeName
  {
     WebConfiguration Web
     {
     }
  }

  Node $AllNodes.Where{$_.Roles -contains "SmtpRole"}.NodeName
  {
     SmtpConfiguration Smtp
     {
     }
  }
}

FarmConfiguration -ConfigurationData $ConfigurationData

Now that I’ve done that I’m able to call it from a separate script like you suggest

.\FarmConfiguration.ps1 -ConfigurationData data.psd1