Powershell Wait for service to be stopped or started

Question

I have searched both this forum and through google and can\'t find what I need. I have a quite large script and I\'m looking for some code that will check if the service is star

Answer 1

I couldn't get the 'count' strategy, that Micky posted, to work, so here is how i solved it:

I created a function, that takes a searchString (this could be "Service Bus *") and the status that i expect the services should reach.

function WaitUntilServices($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')
    }
}

The function can now be called with

WaitUntilServices "Service Bus *" "Stopped"

or

WaitUntilServices "Service Bus *" "Running"

If the timeout period is reached, a not so graceful exception is thrown:

Exception calling "WaitForStatus" with "2" argument(s): "Time out has expired and the operation has not been completed."

Answer 2

I had to tweak this a bit with multiple counters because this service purposely starts and stops slowly. The original script got me on the right track. I had to wait for the service to be in a completely stopped status before I could move on because I'm actually restarting that same service. You could probably remove the "sleep," but I don't mind leaving it in. You could probably remove everything and just use the $stopped variable. :)

    # change to Stopped if you want to wait for services to start
    $running = "Running" 
    $stopPending = "StopPending"
    $stopped = "Stopped"
    do 
    {
        $count1 = (Get-Service $service | ? {$_.status -eq $running}).count
        sleep -Milliseconds 600
        $count2 = (Get-Service $service | ? {$_.status -eq $stopPending}).count
        sleep -Milliseconds 600
        $count3 = (Get-Service $service | ? {$_.status -eq $stopped}).count
        sleep -Milliseconds 600
    } until ($count1 -eq 0 -and $count2 -eq 0 -and $count3 -eq 1)

Answer 3

The following will loop and verify the status of the given services until the number of services with the "Running" state is equal to zero (hence they are stopped), so you can use this if you are waiting for services to Stop.

I've added a $MaxRepeat variable, which will prevent this from running for ever. It will run 20 times max as defined.

$services = "Service Bus *"
$maxRepeat = 20
$status = "Running" # change to Stopped if you want to wait for services to start

do 
{
    $count = (Get-Service $services | ? {$_.status -eq $status}).count
    $maxRepeat--
    sleep -Milliseconds 600
} until ($count -eq 0 -or $maxRepeat -eq 0)

Answer 4

In addition to the answer of mgarde this one liner might be useful if you just want to wait for a single service (also inspired by a post from Shay Levy):

(Get-Service SomeInterestingService).WaitForStatus('Running')