Search results for 'sectionid:230' matching tags 'PS Remoting' and 'Parameter'

Powershell command line arguments - prompt for creds?

virtuallynothere — Thu, 05 Apr 2012 05:00:00 GMT

I am trying to find out if I can launch powershell from an app that I use to manage the list of systems I connect to over RDP. I can define 'external apps' in the program and there are quite a few available. I specify powershell.exe as the program to launch, then the app has a field for arguments. I put in the argument options below and powershell does launch, the computername is filled in when I select the system from the list of computers in the app, but I run this app as a regular user account and I need to connect to the remote servers using a domain admin account. For the rdp connections that is handled by stored credentials in the app, but for external apps like this I need to have powershell prompt for auth. I tried a few things and can't get it working.

powershell.exe -NoProfile -NoExit -Command "& {Enter-PSSession %COMPUTERNAME%}"

I tried adding get-credential, and -credential, but I can't store my name in the arguments, is there a way to get it to prompt me?

how to establish and enter an implicit remote session using runspace in powershell

manishjha — Wed, 18 Jan 2012 06:00:00 GMT

Hi,

I am trying to establish an implicit session with a remote host from my machine from a C# code. I am using runspace API for that. the code snippet is provided below

Runspace runspace = RunspaceFactory.CreateRunspace();
                runspace.Open();

                //constructing the vmname parameter here
                vmname = useralias + DateTime.Now.ToString();

                Pipeline pipeline = runspace.CreatePipeline();
                string scripttext = "$secpasswd = ConvertTo-SecureString '222_bbbb' -AsPlainText –Force";
                string scripttext1 = "$mycreds = New-object -typename System.Management.Automation.PSCredential('TS-TEST-09\\Administrator',$secpasswd)";
                string scripttext2 = "$s = New-PSSession -ComputerName TS-TEST-09 -Credential $mycreds";
                //not accepting session string here, only computername acceptable
                string scripttext3 = "Enter-PSSession -Session $s";

                //put invoke command here instead of directly calling out the file execution
                //Command cmd = new Command(@"C:\mypath\helper.ps1", true);
                //cmd.Parameters.Add("local_useralias", useralias);
                //cmd.Parameters.Add("local_vmname", vmname);
                //cmd.Parameters.Add("local_datastore", datastoredropdown.Text.ToString());
                //cmd.Parameters.Add("local_architecture", architecturedropdown.Text.ToString());

                pipeline.Commands.AddScript(scripttext);
                pipeline.Commands.AddScript(scripttext1);
                pipeline.Commands.AddScript(scripttext2);
                pipeline.Commands.AddScript(scripttext3);
                //pipeline.Commands.Add(cmd);

                Collection<PSObject> results = pipeline.Invoke();


                runspace.Close();

this code is expected to enter into an implicit session with machine TS-TEST-09 and invoke the script helper.ps1 existing on that machine(that part is commented out in the code currently).

now the problem is that i can't enter into the session $s using -Session parameter(highlighted) however i can enter into it using -Computername parameter.

In later case, however, the code tries to access helper.ps1 from the local host and not on the remote server.

Is there a method to accomplish this task?

any help will be much appreciated.

Thanks,

Manish

Re: how to establish and enter an implicit remote session using runspace in powershell

manishjha — Wed, 18 Jan 2012 06:00:00 GMT

Hi Don,

Thanks a lot for the prompt response!

Yes, I stand corrected on this usage of 'implicit' remoting. Thanks for pointing that out.

$s is treated as a PSSession object in the script as 'enter-PSSession' expects this object and not the string as the parameter.

As for your last scenario, here's what i intend to do. I am on host A and I remote to host B. now I want host B to execute a script file that is on host B along with few parameters that i have passed from my session in host A.

whatever is inside scripttexts has been sequentially and successfully executed many times on a powershell console so lets put aside the validity of these command at least from purely powershell perspective. Also, i have gained some more insight into the exact nature of error and i will explain it to you below.

I think the PSHost i am running my application on doesnt support 'Enter-PSSession $s' command as is apparent from the following exception mesage:

invokedSystem.Management.Automation.CmdletInvokationException :
the method or operation is not implemented.

at invokedSystem.Management.Automation.Internal.Host.InteralHost.GetIHostSupportsInteractiveSession()

at invokedSystem.Management.Automation. Internal.Host.InteralHost.PushRunspace(Runspace runspace)

at Microsoft.Powershel.Commands.EnterPSSessionCommand.ProcessRecord()

at System.Management.Automation.Cmdlet.DoProcessRecord()

at System.Management.Automation.CommandProcessor.ProcessRecord()

end of inner exception stack trace

-----------------------------------------------

so i think the solution here should be adding a custom PSHost and providing support for this cmdlet.

However, I don't trust my reasoning fully here and so I need some insights from you.

Thanks again for taking your time out and responding to my query,

Manish