First post! I apologize in advance for formatting. I'm just getting familiar with PowerShell and I'm wanting to Stop a service first, restart another service, and start the initial service. Before moving onto the next next service, I want to make sure that the service has stopped before proceeding.

I'm using this function that was mentioned here and tried to tailor it for my code.

Workflow Goal:

1. Stop Service A
2. Restart Service B
3. Start Service A

Code:

#Stops Service A and validates its in "Stopped" status
Get-Service 'ServiceNameA' -ComputerName 'ExampleServerA' | Stop-Service -force -PassThru

function WaitUntilServices1($searchString, $status)
{
    # Get all services where DisplayName matches $searchString and loop through each of them.
    foreach($service in (Get-Service -DisplayName $searchString))
    {
        # Wait for the service to reach the $status or a maximum of 30 seconds
        $service.WaitForStatus($status, '00:00:30')
    }
}

WaitUntilServices1 "ServiceDisplayNameA" "Stopped"

#Restarts Service B and validates its in "Running" status
Get-Service 'ServiceNameB' -ComputerName 'ExampleServerB' | Restart-Service -force -PassThru

function WaitUntilServices2($searchString, $status)
{
    # Get all services where DisplayName matches $searchString and loop through each of them.
    foreach($service in (Get-Service -DisplayName $searchString))
    {
        # Wait for the service to reach the $status or a maximum of 30 seconds
        $service.WaitForStatus($status, '00:00:30')
    }
}

WaitUntilServices2 "ServiceDisplayNameB" "Running"

#Start Service A and validates its in "Running" status
Get-Service 'ServiceA' -ComputerName 'ExampleServerA' | Start-Service -force -PassThru

Read-Host -Prompt "Press Enter to exit" 

The Code I have above is giving me the following Errors for both of the functions.

Exception calling "WaitForStatus" with "2" argument(s): "Time out has expired and the operation has not been completed." At C:\PowerShell\ScriptExample\ScriptExampleFix.ps1:10 char:9
$service.WaitForStatus($status, '00:00:30')

  CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
  FullyQualifiedErrorId : TimeoutException

Then for the very last portion to start the service I'm getting 1 more error:

Start-Service : A parameter cannot be found that matches parameter name 'force'. At C:\PowerShell\ScriptExample\ScriptExampleFix.ps1:32 char:85
  ... erName 'ServerNameExample' | Start-Service -force -PassTh ...
                                                             ~~~~~~
  CategoryInfo          : InvalidArgument: (:) [Start-Service], ParameterBindingException
  FullyQualifiedErrorId : NamedParameterNotFound,Microsoft.PowerShell.Commands.StartServiceCommand

Any help would get greatly appreciated :)

CodePudding user response：

In the first statement:

#Stops Service A and validates its in "Stopped" status
Get-Service 'ServiceNameA' -ComputerName 'ExampleServerA' | Stop-Service -force -PassThru

You ask PowerShell to stop ServiceNameA on a remote computer.

You then call WaitUntilServices1 which attempts to wait for a service of the same name on your local computer - which is obviously not gonna stop any time soon because you requested stopping a service on a different computer.

Change the function definition to accept a -ComputerName parameter too and pass that to Get-Service:

function Wait-ServiceStatus {
  param(
    [string]$Name,
    [string]$ComputerName = $('.'),
    [System.ServiceProcess.ServiceControllerStatus]$Status
  )

  foreach($service in Get-Service -Name $Name -ComputerName $ComputerName){
    # If any call to WaitForStatus times out and throws, return $false
    try { $service.WaitForStatus($Status, '00:00:30') } catch { return $false }
  }

  # No errors thrown while waiting, all is good, return $true
  return $true
}

Now we can do:

# request the remote SCM stop the service
Get-Service 'ServiceNameA' -ComputerName 'ExampleServerA' | Stop-Service -Force

$success = Wait-ServiceStatus -Name 'ServiceNameA' -ComputerName 'ExampleServerA' -Status Stopped

if(-not $success){
  # output an error
  Write-Error "failed to complete restart cycle, 'ServiceNameA' on 'ExampleServerA' failed to stop in a timely manner"
  # return from this script/function for good measure
  return
}

# ... if we've reached this point the wait must have been successful, continue with the restart cycle.
Get-Service 'ServiceNameB' -ComputerName 'ExampleServerB' | Restart-Service -force -PassThru

$success = Wait-ServiceStatus -Name 'ServiceNameB' -ComputerName 'ExampleServerB' -Status Running
if(-not $success){
  # ... etc.
}