限制并发Powershell作业的数量 [英] Limit number of concurrent powershell jobs

问题描述

我知道这个问题已经被问过了，我已经看到了几种可能的解决方案，但是我似乎无法使它们中的任何一种都适合我的脚本.我的脚本不是成品，需要进行一些清理，但目前肯定可以.

I know this question has been asked before and i have seen a couple of possible solutions, but i can't seem to be able to make any of them work for my script. My script is not a finished product, needs some cleaning up, but it definitely works at the moment.

该脚本的基本功能是它创建虚拟机的快照，然后将其克隆以用于备份.一切都按预期工作，但问题是它使我的vcenter屈服了，因为它一次充斥了太多工作.我想将同时运行的作业数量限制为3到4个.有人可以帮我吗?预先感谢...这是我的代码:

The basic function of the script is that it creates snapshots of virtual machines, and then clones them for backup purposes. Everything works as expected, but the problem is it brings my vcenter to it's knees because it is flooding it with too many jobs at once. I was wanting to limit the amount of jobs that run at once to maybe 3-4 at the same time. Can anyone give me a hand? Thanks in advance... Here is my code:

Add-PSSnapin VMware.VimAutomation.Core

#Connect to vCenter
Connect-VIServer vcenter.mydomain.com

#Define variables
$vmhost = get-vmhost -name 10.1.1.10

#Export list of VM's
get-vmhost -name $vmhost | get-vm | select Name, BackupDS | Export-Csv -NoTypeInformation test.csv

#Edit CSV to populate BackupDS Column
(Import-Csv test.csv) | % { $_.BackupDS = '[NAS1]' +$_.BackupDS; $_ } | Export-Csv test.csv -NoTypeInformation

#Edit CSV file to format required by script
(gc test.csv) | foreach-object{$_ -replace 'Name','MasterVM'} | set-content test.csv -force

#Import Backup CSV
$backupinfo =  Import-Csv test.csv



$scriptblock = {
Param($customer)

    Add-PSSnapin VMware.VimAutomation.Core

    #Connect to vCenter
    Connect-VIServer vcenter.mydomain.com

    #Define variables
    $vmhost = get-vmhost -name 10.1.1.10

    #Set Date format for clone names
    $date = Get-Date -Format "MMddyyyy"

    #Set Date format for emails
    $time = (Get-Date -f "HH:MM")

    $vm = Get-VM $customer.MasterVM

    #Send Start Email
    #C:\scripts\backupstartedemail.ps1

    # Create new snapshot for clone
    $cloneSnap = $vm | New-Snapshot -Name "Clone Snapshot"

    # Get managed object view
    $vmView = $vm | Get-View

    # Get folder managed object reference
    $cloneFolder = $vmView.parent

    # Build clone specification
    $cloneSpec = new-object Vmware.Vim.VirtualMachineCloneSpec
    $cloneSpec.Snapshot = $vmView.Snapshot.CurrentSnapshot

    # Make linked disk specification
    $cloneSpec.Location = new-object Vmware.Vim.VirtualMachineRelocateSpec
    $cloneSpec.Location.Datastore = (Get-Datastore -Name $customer.BackupDS | Get-    View).MoRef
    $cloneSpec.Location.Transform =      [Vmware.Vim.VirtualMachineRelocateTransformation]::sparse

    $cloneName = "$vm-$date"

    # Create clone
    $vmView.CloneVM( $cloneFolder, $cloneName, $cloneSpec )

    # Write newly created VM to stdout as confirmation
    Get-VM $cloneName

    # Remove Snapshot created for clone
    Get-Snapshot -VM (Get-VM -Name $customer.MasterVM) -Name $cloneSnap | Remove-    Snapshot -confirm:$False

    # Remove clones machine from inventory
    remove-vm -vm $cloneName -confirm:$false

    #Send Complete Email
    #C:\scripts\backupcompletedemail.ps1
}

$backupinfo | % {Start-Job -Scriptblock $scriptblock -ArgumentList $_ | Out-Null}

Get-Job | Wait-Job | Receive-Job

我尝试在脚本结尾处抛出以下代码，但是没有运气:

I've tried throwing the following code at the end of the script with no luck:

$backupinfo | % {Start-Job -Scriptblock $scriptblock -ArgumentList $_ | Out-Null}

While((Get-Job -State 'Running').Count -ge 3)
    {
        Start-Sleep -Milliseconds 10
    }

---

更新**

---

Update**

我尝试使用此处提供的答案在powershell中运行N个并行作业.

I tried using the answer provided here, Run N parallel jobs in powershell.

Add-PSSnapin VMware.VimAutomation.Core

#Connect to vCenter
Connect-VIServer vcenter.mydomain.com

#Define variables
$vmhost = get-vmhost -name 10.1.1.10

#Export list of VM's
get-vmhost -name $vmhost | get-vm | select Name, BackupDS | Export-Csv -NoTypeInformation     test.csv

#Edit CSV to populate BackupDS Column
(Import-Csv test.csv) | % { $_.BackupDS = '[NAS1]' +$_.BackupDS; $_ } | Export-Csv test.csv     -NoTypeInformation

#Edit CSV file to format required by script
(gc test.csv) | foreach-object{$_ -replace 'Name','MasterVM'} | set-content test.csv -force

#Import Backup CSV
$backupinfo =  Import-Csv test.csv

#Set Date format for clone names
$date = Get-Date -Format "MMddyyyy"

#Set Date format for emails
$time = (Get-Date -f "HH:MM")

foreach ($customer in $backupinfo) {
    $running = @(Get-Job | Where-Object { $_.State -eq 'Running' })
    if ($running.Count -le 8) {
        Start-Job {
             $vm = Get-VM $customer.MasterVM

    #Send Start Email
    #C:\scripts\backupstartedemail.ps1

    # Create new snapshot for clone
    $cloneSnap = $vm | New-Snapshot -Name "Clone Snapshot"

    # Get managed object view
    $vmView = $vm | Get-View

    # Get folder managed object reference
    $cloneFolder = $vmView.parent

    # Build clone specification
    $cloneSpec = new-object Vmware.Vim.VirtualMachineCloneSpec
    $cloneSpec.Snapshot = $vmView.Snapshot.CurrentSnapshot

    # Make linked disk specification
    $cloneSpec.Location = new-object Vmware.Vim.VirtualMachineRelocateSpec
    $cloneSpec.Location.Datastore = (Get-Datastore -Name $customer.BackupDS | Get-    View).MoRef
    $cloneSpec.Location.Transform =      [Vmware.Vim.VirtualMachineRelocateTransformation]::sparse

    $cloneName = "$vm-$date"

    # Create clone
    #$vmView.CloneVM( $cloneFolder, $cloneName, $cloneSpec )

    # Write newly created VM to stdout as confirmation
    #Get-VM $cloneName

    # Remove Snapshot created for clone
    Get-Snapshot -VM (Get-VM -Name $customer.MasterVM) -Name $cloneSnap | Remove-Snapshot -     confirm:$False

    # Remove clones machine from inventory
    #remove-vm -vm $cloneName -confirm:$false

    #Send Complete Email
    #C:\scripts\backupcompletedemail.ps1
        }
    } else {
         $running | Wait-Job
    }
    Get-Job | Receive-Job
}

运行脚本时，它所做的只是为每个虚拟机返回此脚本，并且从不执​​行任何任务(快照等)

When i run my script all it does is return this for each virtual machine, and never does any of the tasks (snapshots, etc.)

HasMoreData   : True
StatusMessage :
Location      : localhost
Command       :
                     $vm = Get-VM $customer.MasterVM
                     ..................
                     rest of my code
                     ..................
JobStateInfo  : Running
Finished      : System.Threading.ManualResetEvent
InstanceId    : 81ac8e67-0267-4d11-998b-0e8cfa95292b
Id            : 40
Name          : Job40
ChildJobs     : {Job41}
PSBeginTime   : 2/27/2014 12:41:19 PM
PSEndTime     :
PSJobTypeName : BackgroundJob
Output        : {}
Error         : {}
Progress      : {}
Verbose       : {}
Debug         : {}

您可以提供任何指导吗?

Any guidance you can provide?

推荐答案

考虑使用工作流程.它具有一个并行的foreach，可以智能地限制并发执行的次数，例如:

Consider using a workflow. It has a parallel foreach that should intelligently throttle the number of concurrent executions e.g.:

workflow New-Clone([string[]]$Customer) {
    InlineScript { Import-Module modules }
    foreach -parallel($cust in $Customer) {
        InlineScript {
            ...
            $vm = Get-VM $using:cust.MasterVM
            ...
        } 
    }
}

这确实需要PowerShell V3或更高版本才能获得工作流支持.

This does require PowerShell V3 or higher for the workflow support.

这篇关于限制并发Powershell作业的数量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！