使用 PowerShell 为补丁自动化运行同步功能

Question

I've seen different post regarding paralleling or run functions simultaneously in parallel but the code in the answers have not quite worked for me. I'm doing patching automation and the functions I have all work and do their thing separately but since we work with more than 200+ computers, waiting for each function to finish with its batch of computers kind of defeats the purpose. I have the code in one script and in summary its structured like this:

define global variables

$global:varN

define sub-functions

function sub-function1()

function sub-functionN()

define main functions

function InstallGoogleFunction($global:varN) {

$var1

$result1 = sub-function1

$resultN = sub-functionN

}

function InstallVLCFunction($global:varN) {

"similar code as above"

}

function InstallAppFunction($global:varN) {

"similar code as above"

}

The functions will all install a different app/software and will write output to a file. The only thing is I cannot seem to run all the functions for installation without waiting for the first one to finish. II tried start-job code but it executed and displayed a table like output but when verifying the computers neither had anything running on Task Manager. Is there a way powershell can run this installation functions at the same time? If I have to resort to a one-by-one I will call the functions by the least amount of time taken or the least computers the functions read they need to install I will but I just wanted someone to better explain if this can be done.

Answer 1

You can use multithreading to achieve this. Below example shows how you can trigger tasks on multiple using multi threading in PowerShell.

Replace list of machines in $Computers with your machines and give it a try. Below example get the disk details on given machines

# This is your script you want to execute
$wmidiskblock = 
{ 
  Param($ComputerName = "LocalHost") 
  Get-WmiObject -ComputerName $ComputerName -Class win32_logicaldisk |  Where-Object {$_.drivetype -eq 3} 
} 

# List of servers
$Computers = @("Machine1", "Machine2", "Machine3")  

#Start all jobs in parallel 
ForEach($Computer in $Computers) 
{ 
   Write-Host $Computer 
   Start-Job -scriptblock $wmidiskblock  -ArgumentList $Computer 
} 

Get-Job | Wait-Job 

$out = Get-Job | Receive-Job 
$out |export-csv 'c:\temp\wmi.csv'