I wrote a script to restart a few ASP.NET websites on a remote server:
$computerName = #...
$password = #...
$secureStringPassword = ConvertTo-SecureString -AsPlainText -Force -String $password
$userName = #...
$credential= New-Object System.Management.Automation.PSCredential ($userName, $secureStringPassword)
$websiteNames = #..., #..., #...
Get-PSSession -ComputerName $computerName -Credential $credential | Remove-PSSession
$psSession = New-PSSession -ComputerName $computerName -Credential $credential
Invoke-Command -Session $psSession -ScriptBlock { $websiteNames | foreach{ Stop-Website -Name $_ } }
Invoke-Command -Session $psSession -ScriptBlock { $websiteNames | foreach{ Start-Website -Name $_ } }
$psSession | Remove-PSSession
For some reasons my Invoke-Command do not run properly, I have the following error message:
Cannot validate argument on parameter 'Name'. The argument is null. Provide a valid value for the argument, and then try running the command again.
When the commands are run after an Enter-PSSession it works fine within a -ScriptBlock it kinda mess up the -Name parameter, any idea how to fix that up?
The remote session cannot access the variables you have defined locally. They can be referenced with $using:variable
Invoke-Command -Session $psSession -ScriptBlock { $using:websiteNames | foreach{ Stop-Website -Name $_ } }
Invoke-Command -Session $psSession -ScriptBlock { $using:websiteNames | foreach{ Start-Website -Name $_ } }
More information in the about_remote_variables help:
get-help about_remote_variables -Full
Actually just needed to pass the arguments to the -ArgumentList of the -ScriptBlock and use $args to reference to it within the function block:
Invoke-Command -Session $psSession -ScriptBlock { $args | foreach{ Stop-Website -Name $_ } } -ArgumentList $websiteNames
Invoke-Command -Session $psSession -ScriptBlock { $args | foreach{ Start-Website -Name $_ } } -ArgumentList $websiteNames
Related
So I am running an Invoke-CimMethod to push an Enable-PSRemoting command to target computer. Then run an Invoke-Command using PS-Session as a parameter. The two scripts work separately, but if I run them together I keep getting this error:
Copy-Item : The runspace state is not valid for this operation.
I had to restate the $session variable like so in order for it to run. I have bolded and highlighted the line below. My question is why?
$env:hostname = 'PC1'
$Session = New-PSSession $env:hostname
$DestinationPath = "C:\windows\temp"
$SessionArgs = #{
ComputerName = $env:hostname
Credential = $credential
SessionOption = New-CimSessionOption -Protocol Dcom
}
$MethodArgs = #{
ClassName = 'Win32_Process'
MethodName = 'Create'
CimSession = New-CimSession #SessionArgs
Arguments = #{
CommandLine = "powershell Start-Process powershell -ArgumentList 'Enable-PSRemoting -Force'"
}
}
Invoke-CimMethod #MethodArgs
Invoke-Command -Session $Session -ScriptBlock { Param($Destination) New-Item -Path $Destination -ItemType Directory -ErrorAction SilentlyContinue} -ArgumentList $DestinationPath
Copy-Item -Path "\\shared\drive\foo\bar\" -Destination "C:\windows\temp\ZScaler" -Recurse -force
############Restated here#############
$Session = New-PSSession $env:hostname
############Restated here#############
Invoke-Command -Session $session -ScriptBlock {
$msbuild = "C:\Windows\Temp\Installer\Installer.msi"
$arguments = "/quiet"
Start-Process -FilePath $msbuild -ArgumentList $arguments -Wait -Verbose
}
$Session | Remove-PSSession
I am running the below code but the restart is not working. My intention was to run restart command parallelly on all remote machines at once.
$YourFile = gc "machinelst.txt"
$username = "user1"
$password = "pass1"
$secpw = ConvertTo-SecureString $password -AsPlainText -Force
$cred = New-Object Management.Automation.PSCredential ($username, $secpw)
foreach ($computer in $YourFile)
{
Invoke-Command -ComputerName $computer -credential $cred -ErrorAction Stop -ScriptBlock { Restart-Computer -ComputerName $computer -Force } -AsJob
}
That looks like its the output from Get-Job - could you try Receive-Job $id (Receive-Job 80).
Should give you the actual exception.
This likely runs in parallel just like invoke-command does with an array of computernames:
restart-computer computer01,computer02,computer03,computer04,computer05
Or this. It takes a couple minutes for the winrm service to come back, but they all seem to reboot at the same time.
$c = get-credential
$list = 1..10 | % tostring computer00
restart-computer $list -wait -protocol wsman -cr $c
try this (you will can add -asjob if it's work) :
$username = "yourdomain\user1"
$password = ConvertTo-SecureString "pass1" -AsPlainText -Force
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $password
get-content "machinelst.txt" | %{
Restart-Computer -ComputerName $_ -Authentication default -Credential $cred
}
if you want use job, you can do it :
$listjob=#()
get-content "machinelst.txt" | %{
$listjob+=Restart-Computer -ComputerName $_ -Authentication default -Credential $cred -AsJob
}
$listjob | Wait-Job -Timeout 30
$listjob | %{
if ($_.State -eq 'Failed' )
{
Receive-Job -Job $_ -Keep
}
}
I am trying to enter a PSSession using -Computername $Server which was previously defined, but I can't seem to get this to work.
I have tried single, double, and no quotes around the variable at all. What am I doing wrong?
$Servers = Import-Csv "C:\Users\username\Desktop\DNS.csv"
$secpass = ConvertTo-SecureString 'mypassword' -AsPlainText -Force
$myCred = New-Object System.Management.Automation.PSCredential("username", $secpass)
foreach ($Object in $Servers) {
$Server = $Object.Name
Enter-PSSession -ComputerName "$Server" -Credential $myCred
sl HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters
Invoke-Command -ScriptBlock {Get-Item -Path HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters}
Exit-PSSession
}
We use enter pssession for creating an interactive session with the remote computer.
In your case, you do not need to have an interaction with the remote system. You just need to fetch the details from the remote systems which are present in the csv file.
So, Instead of this:
foreach($Object in $Servers) {
$Server = $Object.Name
Enter-PSSession -ComputerName "$Server" -Credential $myCred
sl HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters
Invoke-Command -ScriptBlock {Get-Item -Path HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters}
Exit-PSSession
}
Do This:
foreach($Object in $Servers)
{
$Server = $Object.Name
Invoke-Command -ComputerName $Server -ScriptBlock {Get-Item -Path HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters} -Credential $myCred
}
Note: I believe you have enabled PSRemoting and have edited trusted hosts.
The ComputerName param of Invoke-Command will accept an array of servers so you can do away with the foreach loop entirely and simplify your code to:
$Servers = Import-Csv "C:\Users\username\Desktop\DNS.csv" | Select-Object -ExpandProperty Name
$secpass = ConvertTo-SecureString 'mypassword' -AsPlainText -Force
$myCred = New-Object System.Management.Automation.PSCredential("username", $secpass)
Invoke-Command -ComputerName $Servers -ScriptBlock {Get-Item -Path HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters} -Credential $myCred
I am struggling with invoke-Command to execute custom function remotely and display the output at the local host. I've read many posts regarding invoke-Command online but I haven't find a way to resolve this problem.
First the custom function is working. It's called get-openfiles. The code is provided below:
function get-openfiles{
param(
$computername=#($env:computername),
$verbose=$false)
$collection = #()
foreach ($computer in $computername){
$netfile = [ADSI]"WinNT://$computer/LanmanServer"
$netfile.Invoke("Resources") | foreach {
try{
$collection += New-Object PsObject -Property #{
Id = $_.GetType().InvokeMember("Name", ‘GetProperty’, $null, $_, $null)
itemPath = $_.GetType().InvokeMember("Path", ‘GetProperty’, $null, $_, $null)
UserName = $_.GetType().InvokeMember("User", ‘GetProperty’, $null, $_, $null)
LockCount = $_.GetType().InvokeMember("LockCount", ‘GetProperty’, $null, $_, $null)
Server = $computer
}
}
catch{
if ($verbose){write-warning $error[0]}
}
}
}
Return $collection
}
I have used following methods but none of them working. Some of example below will work for built-in function but my condition is that I have to use the custom function.
# NOT WORKING #1
$s = New-PSSession -ComputerName remote-STL
$CifServer = "fs-STL-01"
function get-openfiles{..}
invoke-command -Session $s -ScriptBlock ${function:get-openfiles} -ArgumentList $CifServer
# NOT WORKING #2
$s = New-PSSession -ComputerName remote-STL
$CifServer = "fs-STL-01"
invoke-command -Session $s -ScriptBlock {Import-Module C:\scripts\grp-functions.psm1}
invoke-command -Session $s -ScriptBlock {get-openfiles -computername $args[0]} -ArgumentList $CifServer
# Not working #3
$s = New-PSSession -ComputerName remote-STL
$CifServer = "fs-STL-01"
invoke-command -Session $s -ScriptBlock {Import-Module C:\scripts\grp-functions.psm1}
invoke-command -Session $s -ScriptBlock { param($CifServer) get-openfiles -computername $Cifserver } -ArgumentList $CifServer
# Not working #4
$CifServer = "fs-STL-01"
function get-openfiles{..}
invoke-command -ComputerName remote-STL -ScriptBlock ${function:get-openfiles} -ArgumentList $CifServe
# not working #5
$CifServer = "fs-STL-01"
invoke-command -ComputerName remote-STL -ScriptBlock {get-openfiles -computername $args[0]} -ArgumentList $CifServer
Thanks for look into it!
You should send entire function in your scriptblock.
invoke-command -ComputerName computername -ScriptBlock {function get-whatever {dir}; get-whatever } -Credential (get-credential youruser)
This example runs get-whatever function that is dir command only and is the proof of concept. Change it to your desired code.
I am trying to run a script block on a remote machine, but i don't to be prompted for credentials, i want to pass them in the script.
Some commands may but the commands i want to run are access denied unless i provide the credential.
for example this command can work:
Invoke-Command -Session $session -ErrorAction Stop -ErrorVariable $Error -Scriptblock {ls }
but this wont work unless -credential is passed (Invoke-Command on target)
Invoke-Command -Session $session -ErrorAction Stop -ErrorVariable $Error -Scriptblock {Invoke-Command -computername $Env:COMPUTERNAME -Credential $Cred -ScriptBlock {ls} }
the same way what i want to achieve causes access denied problem (starting a process)
Invoke-Command -Session $session -ErrorAction Stop -ErrorVariable $Error -Scriptblock {[System.Diagnostics.Process]::Start("C:\Myprocess.exe", $localArgs, "UserName", $credential.Password, "MyDomain")}
Invoke-Command -Session $session -ErrorAction Stop -ErrorVariable $setError -Scriptblock {$Domain = "domain";$PassSec = ConvertTo-SecureString $( "password") -AsPlainText -Force ; $Cred = New-Object -TypeName System.Management.Automation.PSCredential -argumentlist $($domain + "\" + "userName"),$passSec; Invoke-Command -computername $Env:COMPUTERNAME -Credential $Cred -ScriptBlock {C:\Myprocess.exe } }