Rerun command after sleep if previous execution of command failed

PowerShell Help
1

Here is what I am trying to do, I am trying to run a command line for example netdom and out the result to a file. I read the output back into a variable and check if the command was successful. If the command was unsuccessful it sleep for a few seconds and then retries the command again. It retries certain number of times.

Problem I am having is with the second part, it does not go into sleep. Could someone help and let me know what I am doing wrong?

    $retries = 5
    $secondsDelay = 2
    $retrycount = 0
    $completed = $false
        
        while (-not $completed) {
        try {
            & netdom Join $env:COMPUTERNAME /PasswordM:$env:COMPUTERNAME$ /Domain:DM.COM\RODC0001.dm.com /ReadOnly | Out-File "C:\Install\Join.txt"
            $a = Get-Content -Path "C:\Install\Join.txt"
            if ($a -ne "The command failed to complete successfully.")
            {
                Write-Verbose ("Command [{0}] succeeded.")
                $completed = $true
            }
        } catch {
            if ($retrycount -ge $retries) {
                Write-Verbose ("Command [{0}] failed the maximum number of {1} times.")
                throw
            } else {
                Write-Verbose ("Command [{0}] failed. Retrying in {1} seconds.")
                Start-Sleep $secondsDelay
                $retrycount++
            }
        }
    }
2

Netdom is not returning an exception so you are not falling into the catch logic. try this

    $retries = 5
    $secondsDelay = 2
    $retrycount = 0
    $completed = $false
        
        while (-not $completed){
            & netdom Join $env:COMPUTERNAME /PasswordM:$env:COMPUTERNAME$ /Domain:DM.COM\RODC0001.dm.com /ReadOnly | Out-File "C:\Install\Join.txt"
            $a = Get-Content -Path "C:\Install\Join.txt"
            if ($a -ne "The command failed to complete successfully."){
                Write-Verbose ("Command [{0}] succeeded.")
                $completed = $true
            }

            if ($retrycount -ge $retries){
                Write-Verbose ("Command [{0}] failed the maximum number of {1} times.")
                throw
            } else {
                Write-Verbose ("Command [{0}] failed. Retrying in {1} seconds.")
                Start-Sleep $secondsDelay
                $retrycount++
            }
    }
3

Would the lastlogon or lastlogondate attributes of the computer object indicate that it is domain joined?

4

Hi Jonathan… Thank you… Have modified the script that you provided to work as expected. Changed the Throw to Break to avoid error exception during execution. Here is the updated script.

    $retries = 5
    $secondsDelay = 10
    $retrycount = 0
    $completed = $false
        
        while (-not $completed){
            & netdom Join $env:COMPUTERNAME /PasswordM:$env:COMPUTERNAME$ /Domain:DM.COM\RODC0001.dm.com /ReadOnly | Out-File "C:\Install\Join.txt"
            $a = Get-Content -Path "C:\Install\Join.txt"
            if ($a -eq "The command complete successfully."){
                Write-Output ("Command succeeded.")
                $completed = $true
            }
            else                     
            {
                if ($retrycount -ge $retries){
                    Write-Output ("Command failed the maximum number of $retrycount times.")
                    break
                } else {
                    Write-Output ("Command failed. Retrying in $secondsDelay seconds.")
                    remove-item -path "C:\Install\Join.txt" -force
                    Start-Sleep $secondsDelay
                    $retrycount++
                }
            }
    }