Script Resource: Ensure Absent?

Welcome Forums DSC (Desired State Configuration) Script Resource: Ensure Absent?

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Keymaster
4 years, 4 months ago.

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  • #19574

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    I'm starting to use the script resource quite a bit, and after writing a few resources I realize that there is no "Ensure = Present/Absent"
    My question is, how are people handling this?
    I'm trying to write my DSC script so that I can set a variable at the top:
    (pre)
    param(
    [string]$Action="Present"
    )
    (/pre)

    The idea being that I can use the same script to generate a mof to build a server, and also to generate a mof to revert a server.
    Has anyone else tackled this already?

    I'm thinking I could use my $Action as a switch statement in both the Test and Set actions to either ensure the result is present or absent.

    Q: In general are people doing this, or is this a waste of time?

    Thanks,

    Mike

  • #19595

    Keymaster
    Points: 1,811
    Helping HandTeam Member
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    Correct. Not all resources provide an "Ensure" setting; the Script Resource only provides Get/Set/Test settings, which are script blocks. If you want something gone, you write a script item that makes sure it's gone. If you want something present, you write a separate script setting to make it present. The downside of script resources is that they're not as easily reusable across situations.

    What you probably want to do instead is write a custom resource, as a script module. There, you can definitely define an Ensure setting, and your Get/Set/Test functions can handle it accordingly. What you're trying to do with the script resource is more than it was intended for, and you're going to fight it.

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