多个 Get-WmiObject 调用的单一连接答案

【问题标题】：Single connection for multiple Get-WmiObject calls多个 Get-WmiObject 调用的单一连接
【发布时间】：2018-10-26 19:50:03
【问题描述】：

下面的脚本成功获取了我在hostnames.txt中提供的每台电脑的制造商、型号、序列号和操作系统。但是，它很慢，因为它必须连接到每台计算机上的 WMI 三次。

$OS = Get-WmiObject Win32_OperatingSystem -ComputerName $Computer
$CS = Get-WmiObject Win32_ComputerSystem -ComputerName $Computer
$BIOS = Get-WmiObject Win32_Bios -ComputerName $Computer

如何使用 PowerShell 连接到远程计算机的 WMI 一次并使用同一连接执行三个查询？

$Array = @() ## Create Array to hold the Data
$Computers = Get-Content -Path .\hostnames.txt

foreach ($Computer in $Computers)
{

    $Result = "" | Select HostPS,Mfg,Model,Serial,OS

    $Result.HostPS = $Computer
    $ErrorActionPreference = "SilentlyContinue" ## Don't output errors for offline computers
    $OS = Get-WmiObject Win32_OperatingSystem -ComputerName $Computer

    $CS = Get-WmiObject Win32_ComputerSystem -ComputerName $Computer

    $BIOS = Get-WmiObject Win32_Bios -ComputerName $Computer
    $ErrorActionPreference = "Continue"

    $Result.Mfg = $CS.Manufacturer
    $Result.Model = $CS.Model
    $Result.Serial = $BIOS.SerialNumber
    $Result.OS = $OS.Caption

    $Array += $Result ## Add the data to the array
}

$Array | Export-Csv file.csv -NoTypeInformation

【问题讨论】：

我不会回答您的具体问题，但如果您只在使用Get-WMIObject 时选择您需要的内容，它应该会有所帮助。例如，$OS = Get-WmiObject Win32_OperatingSystem -ComputerName $Computer | Select-Object Caption

标签： powershell wmi get-wmiobject

【解决方案1】：

您可以使用 CIM（它有一个会话选项），more on CIM vs WMI（“WMI 是 Windows 平台的 CIM 的 Microsoft 实现”）

$CIMSession = New-CimSession -ComputerName $RemoteComputer

Get-CimInstance win32_OperatingSystem -CimSession $CIMSession -Property Caption
Get-CimInstance Win32_ComputerSystem -CimSession $CIMSession -Property Manufacturer,Model
Get-CimInstance Win32_Bios -CimSession $CIMSession -Property SerialNumber

【讨论】：

【解决方案2】：

对我来说，通常的做法是使用Invoke-Command 在每个目标系统上运行一个脚本块。如果您告诉它忽略错误，它将并行运行 [在目标系统上] 并从响应者返回您的数据。要获得无响应者，请将输入列表与结果进行比较。 [咧嘴一笑]

这是一个想法的演示......

#requires -RunAsAdministrator

# fake reading in a list of computer names
#    in real life, use Get-Content or (Get-ADComputer).Name
$ComputerList = @'
Localhost
BetterNotBeThere
127.0.0.1
10.0.0.1
::1
'@.Split("`n").Trim("`r")

$IC_ScriptBlock = {
    $CIM_ComputerSystem = Get-CimInstance -ClassName CIM_ComputerSystem
    $CIM_BIOSElement = Get-CimInstance -ClassName CIM_BIOSElement
    $CIM_OperatingSystem = Get-CimInstance -ClassName CIM_OperatingSystem
    $CIM_Processor = Get-CimInstance -ClassName CIM_Processor
    $CIM_LogicalDisk = Get-CimInstance -ClassName CIM_LogicalDisk |
        Where-Object {$_.Name -eq $CIM_OperatingSystem.SystemDrive}

    [PSCustomObject]@{
        LocalComputerName = $env:COMPUTERNAME
        Manufacturer = $CIM_ComputerSystem.Manufacturer
        Model = $CIM_ComputerSystem.Model
        SerialNumber = $CIM_BIOSElement.SerialNumber
        CPU = $CIM_Processor.Name
        RAM_GB = '{0:N2}' -f ($CIM_ComputerSystem.TotalPhysicalMemory / 1GB)
        SysDrive_Capacity_GB = '{0:N2}' -f ($CIM_LogicalDisk.Size / 1GB)
        SysDrive_FreeSpace_GB ='{0:N2}' -f ($CIM_LogicalDisk.FreeSpace / 1GB)
        SysDrive_FreeSpace_Pct = '{0:N0}' -f ($CIM_LogicalDisk.FreeSpace / $CIM_LogicalDisk.Size * 100)
        OperatingSystem_Name = $CIM_OperatingSystem.Caption
        OperatingSystem_Version = $CIM_OperatingSystem.Version
        OperatingSystem_BuildNumber = $CIM_OperatingSystem.BuildNumber
        OperatingSystem_ServicePack = $CIM_OperatingSystem.ServicePackMajorVersion
        CurrentUser = $CIM_ComputerSystem.UserName
        LastBootUpTime = $CIM_OperatingSystem.LastBootUpTime
        UpTime_Days = '{0:N2}' -f ([datetime]::Now - $CIM_OperatingSystem.LastBootUpTime).Days
        }

    }

$IC_Params = @{
    ComputerName = $ComputerList
    ScriptBlock = $IC_ScriptBlock
    ErrorAction = 'SilentlyContinue'
    }
$RespondingSystems = Invoke-Command @IC_Params
$NOT_RespondingSystems = $ComputerList.Where({
    # these two variants are needed to deal with an ipv6 localhost address
    "[$_]" -notin $RespondingSystems.PSComputerName -and
    $_ -notin $RespondingSystems.PSComputerName
    })

$RespondingSystems
$NOT_RespondingSystems

$RespondingSystems 列表中的一项...

LocalComputerName           : [MySystemName]
Manufacturer                : System manufacturer
Model                       : System Product Name
SerialNumber                : System Serial Number
CPU                         : AMD Phenom(tm) II X4 945 Processor
RAM_GB                      : 8.00
SysDrive_Capacity_GB        : 931.41
SysDrive_FreeSpace_GB       : 735.15
SysDrive_FreeSpace_Pct      : 79
OperatingSystem_Name        : Microsoft Windows 7 Professional 
OperatingSystem_Version     : 6.1.7601
OperatingSystem_BuildNumber : 7601
OperatingSystem_ServicePack : 1
CurrentUser                 : [MySystemName]\[MyUserName]
LastBootUpTime              : 2018-10-19 7:01:51 PM
UpTime_Days                 : 7.00
PSComputerName              : [::1]
RunspaceId                  : e17c2741-ba8b-4fbb-b3db-9c7fd0d84f0d

$NOT_RespondingSystems 列表...

BetterNotBeThere
10.0.0.1

【讨论】：