How to keep a powershell script running 24/7 - powershell

Question

I have a PowerShell script that needs to be restarted when it dies for whatever reason, be it a crash, a self exit or after a system reboot...
How can I, from a bat or another powershell script, see to it that if it is not running, it will be started again...
i.e. how can I find out if it is already running from another script?
I know I can make one powershell script start the active one and simply have it loop a new start as long as it doesnt exit with a specific error... but then THAT scripts need to be seen to :D So we are back to the original quesiton, how do I keep THAT script running 24/7?
do
{
$date = Get-Date -format "yyyy-MM-ddTHH:mm:ss"
"$($date) Repeat : Restarting Worker, LastExitCode $($LastExitCode)." | Out-File D:\IDM\Worker\Worker.LOG -width 180 -append
powershell -File "D:\IDM\Scripts\Worker.ps1"
sleep 10
}
while ($LastExitCode -ne $null)

Answer 1

I would just use scheduled tasks. There are plenty of options in there to help you do what you want. You can run the script every five minutes and have it do enough loops to take up that time and quit:
$now = Get-Date
while ($now.AddMinutes(5) -lt (Get-Date)){
...work...
}
Or you could even have it write a flag file every time the loop works and have any new process check that file to see if there hasn't been activity on it. If there's been no activity:
$workFlag = Get-Item C:\work.flg
$cutOff = (Get-Date).AddMinutes(-5)
if ($workFlag.LastWriteTime -gt $cutOff){
New-Item -force -path C:\work.flg
...work loop..
}