如何在asp.net中执行Powershell和Powercli命令时设置超时mvc

Question

我正在研究一个asp.net mvc web应用程序，并且我有以下代码定义了一个服务器列表上的循环并执行PowerCli命令我的asp.net mvc的每个服务器内： -

//Start Loop 
    var shell = PowerShell.Create(); 
    var shell2 = PowerShell.Create(); 
    var shell3 = PowerShell.Create(); 

    string PsCmd = "add-pssnapin VMware.VimAutomation.Core; $vCenterServer = '" + vCenterName + "';$vCenterAdmin = '" + vCenterUsername + "' ;$vCenterPassword = '" + vCenterPassword + "';" + System.Environment.NewLine; 

    PsCmd = PsCmd + "$VIServer = Connect-VIServer -Server $vCenterServer -User $vCenterAdmin -Password $vCenterPassword;" + System.Environment.NewLine; 

    PsCmd = PsCmd + "Get-VMHost " + System.Environment.NewLine; 

    string PsCmd2 = "add-pssnapin VMware.VimAutomation.Core; $vCenterServer = '" + vCenterName + "';$vCenterAdmin = '" + vCenterUsername + "' ;$vCenterPassword = '" + vCenterPassword + "';" + System.Environment.NewLine; 

    PsCmd2 = PsCmd2 + "$VIServer = Connect-VIServer -Server $vCenterServer -User $vCenterAdmin -Password $vCenterPassword;" + System.Environment.NewLine; 

    PsCmd2 = PsCmd2 + " Get-VMHost " + vCenterName + "| Get-VMHostNetworkAdapter -VMKernel" + System.Environment.NewLine; 

    shell.Commands.AddScript(PsCmd); 
    shell2.Commands.AddScript(PsCmd2); 

    dynamic results = shell.Invoke(); 
    dynamic results2 = shell2.Invoke(); 
// end of loop 

，但我注意到，有时shell命令将挂起和执行永远不会结束,,所以我可以定义超时行为,,使5分钟后跳过命令如果没有结果返回...

Answer 1

你将不得不推出自己的超时命令。以下是我编写的基于MSDN Blog entry by Keith Babinec - Executing PowerShell scripts from C#的代码。我仅在控制台应用程序中编写示例，仅用于演示目的。我发现更容易看到发生了什么。您可以通过删除控制台输出和其他调整将其转换为Asp.Net应用程序。

这里是Program.cs的

using System; 
using System.Management.Automation; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      string script = "Write-Host \"Testing lopping...\"" + Environment.NewLine 
          + "for ($i=1; $i -le 5; $i++)" + Environment.NewLine 
          + "{" + Environment.NewLine 
          + "Write-Output $i" + Environment.NewLine 
          + "Start-Sleep -s 3" + Environment.NewLine 
          + "}" + Environment.NewLine 
          + "Write-Host \"Done!\"" + Environment.NewLine; 

      PowerShell shell = PowerShell.Create(); 
      shell.AddScript(script); 

      PowerShellHelper helper = new PowerShellHelper(shell); 
      try 
      { 
       // the script above should take 15 seconds to execute 

       // do timeout of 10 minutes 
       helper.ExecuteAsynchronously(new TimeSpan(0, 10, 0)); 

       // do a really short timeout - 2 seconds 
       helper.ExecuteAsynchronously(new TimeSpan(0, 0, 2)); 
      } 
      catch(TimeoutException te) 
      { 
       Console.WriteLine("\n\nScript took long!"); 
      } 

      Console.WriteLine("Demo Finish"); 
      Console.ReadLine(); 
     } 
    } 
} 

这里是PowerShellHelper.cs

using System; 
using System.Management.Automation; 
using System.Threading; 

// This code was build from MSDN Blogs entry by Keith Babinec 
// http://blogs.msdn.com/b/kebab/archive/2014/04/28/executing-powershell-scripts-from-c.aspx 

namespace ConsoleApplication1 
{ 
    class PowerShellHelper 
    { 
     private PowerShell shell_; 

     public PowerShellHelper(PowerShell shell) 
     { 
      shell_ = shell; 
     } 
     public void ExecuteAsynchronously(TimeSpan timeout) 
     { 
      // prepare a new collection to store output stream objects 
      PSDataCollection<PSObject> outputCollection = new PSDataCollection<PSObject>(); 
      outputCollection.DataAdded += outputCollection_DataAdded; 

      // begin invoke execution on the pipeline 
      // use this overload to specify an output stream buffer 
      IAsyncResult result = shell_.BeginInvoke<PSObject, PSObject>(null, outputCollection); 

      // start the timer 
      DateTime startTime = DateTime.Now; 

      // do something else until execution has completed. 
      // this could be sleep/wait, or perhaps some other work 
      while (result.IsCompleted == false) 
      { 
       Console.WriteLine("Waiting for pipeline to finish..."); 
       Thread.Sleep(100); 

       // we check on our timeout here 
       TimeSpan elasped = DateTime.Now.Subtract(startTime); 
       if (elasped > timeout) 
       { 
        // we can do a few things here, I like to throw exception 
        throw new TimeoutException("Powershell script taking too long"); 
       } 
      } 

      Console.WriteLine("Execution has stopped. The pipeline state: " + shell_.InvocationStateInfo.State); 

      foreach (PSObject outputItem in outputCollection) 
      { 
       //TODO: handle/process the output items if required 
       if (outputItem != null) 
       { 
        Console.WriteLine(outputItem.BaseObject.ToString()); 
       } 
      } 
     } 

     /// <summary> 
     /// Event handler for when data is added to the output stream. 
     /// </summary> 
     /// <param name="sender">Contains the complete PSDataCollection of all output items.</param> 
     /// <param name="e">Contains the index ID of the added collection item and the ID of the PowerShell instance this event belongs to.</param> 
     private void outputCollection_DataAdded(object sender, DataAddedEventArgs e) 
     { 
      // do something when an object is written to the output stream 
      Console.WriteLine("Object added to output."); 
     } 
    } 
}