PowerShell workflow Invoke-Command not working (Write-Host)

Question

Currently trying to use PowerShell workflow to process some remote server stuff that I am doing in parallel.

I am having no luck trying to get the Invoke-Command to log onto the server to actually work. It is not throwing an error but there also is no output to the console like there usually is with a Write-Host statement. Not seeing anything that is helping me looking through older posts.

workflow test {
    Param([System.Management.Automation.PSCredential]$cred)

    InlineScript {
        Write-Host $using:cred
        Invoke-Command -Computer "server" -Credential $using:cred  -ScriptBlock { Write-Host "hello world" } }
    }
}

#Calling the function
test $cred

Don't use workflows just to run stuff in parallel (you can do that with jobs or runspaces). Not only are workflows significantly slower than regular PowerShell, but there are also subtle differences to normal PowerShell, b/c workflows are running in a different engine. Workflows have their use when you know what you're doing, but don't use them just because. — Ansgar Wiechers
– Ansgar Wiechers, Commented Jul 23, 2019 at 9:21
@AnsgarWiechers Thank you! This turns out to be a much more elegant solution instead and I like the fact that this keeps it all within the powershell environment . — lmurdock12
– lmurdock12, Commented Jul 23, 2019 at 16:33

js2010 · Accepted Answer · 2019-07-23 00:15:41Z

0

write-output instead of write-host works. Note that this runs in parallel too:

invoke-command computer1,computer2,computer3 { 'whatever' }

By the way, you have an extra curly bracket at the end.

Another way to do it:

workflow test {
  InlineScript {
    Write-Host 'hello world'
  }
}

test -pscomputername server -pscredential $cred

edited Jul 23, 2019 at 0:15

answered Jul 22, 2019 at 23:15

js2010

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