Logging Function / Module

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4 years, 6 months ago.

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  • #18945

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    Hey everyone
    I'm curious what people here use for robust logging.
    I've been searching for ways to incorporate logging into my scripts. For example, I'm looking for a consistent way to log data to a .log file somewhere locally on the system running the scripts. The data I'm looking for is:
    -Time stamp
    -What the script is doing
    -Any errors encountered
    -Completion of Script with time stamp

    I've seen some examples out there, but they all involve just sending manually entered text to a log file. What I'd like is something that can accept pipeline input and have that appear in the log. (Ex: Get-Service | Write-Log). Or have the entire contents from the Start/Stop-Transcript piped to a log file.

    What have you come across that you've found to work well? Any recommendations?

  • #18946

    Points: 0
    Rank: Member

    Here's what I use: http://gallery.technet.microsoft.com/Enhanced-Script-Logging-27615f85

    If you use the *-LogFile cmdlets, you get the default behavior, which is to prepend a date / time stamp to each line of output, along with an indicator of which stream it came from ([E] for error, [V] for verbose, etc) and send them to a log file. There are also equivalent *-OutputSubscriber cmdlets which allow you to define the behavior yourself. When you use those commands, you give it a Script Block which will be executed for each line of intercepted console output.

    Long story short, I only really have to add two lines of code to my scripts in order to get a log file:

    # near the beginning of the script:
    $script:logFile = Enable-LogFile -Path c:\path\to\log\file.txt
    # At the end of the script (optional, but can keep unrelated console output from bleeding into the script's log file):
    $script:logFile | Disable-LogFile

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