Windows Service From Powershell Script

https://github.com/jeremybusk/windowsWatcherServiceViaPowershell/blob/main/README.md

Create Event Log Application and test event

New-EventLog –LogName Application –Source "watchAuth0LDAPConn"
Write-EventLog –LogName Application –Source "watchAuth0LDAPConn" –EntryType Information –EventID 1 –Message "This is a test message."

Create Script

C:\app\watchAuth0LDAPConn.ps1

$url = "http://127.0.0.1:49948"
$sleep = 3
$msg = "Starting $url connection watcher."
Write-Output $msg
Write-EventLog -LogName "Application" -Source "watchAuth0LDAPConn" -EventID 1 -EntryType Information -Message $msg
while($true){
  try { ($rspStatusCode = Invoke-WebRequest http://localhost:49948).StatusCode
  } catch {
    $rspStatusCode = $_.Exception.Response.StatusCode.Value__
    # $_.Exception.Message
  }
  if (!(200, 401 -eq $rspStatusCode)){
    write-output "True"
    $msg = "URL $url is unresponsive or not resonding with valid rsp code. Restarting Auth0LDAP service."
    Write-Output $msg
    Write-EventLog -LogName "Application" -Source "watchAuth0LDAPConn" -EventID 2 -EntryType Warning -Message $msg
    restart-service "Auth0 ADLDAP"
  }
  Start-Sleep -s $sleep
}

Create Service

Download and use nssm.exe to create service - https://nssm.cc/download

$Binary = (Get-Command Powershell).Source
$Arguments = '-ExecutionPolicy Bypass -NoProfile -File "C:\app\watchAuth0LDAPConn.ps1"'
.\nssm.exe install watchAuth0LDAPConn $Binary $Arguments

Start Service

start-service watchAuth0LDAPConn
get-service watchAuth0LDAPConn

Remove Service

nssm.exe remove watchAuth0LDAPConn confirm

you may be able to use sc.exe but I had issues with New-Service command limits because it was ps1 and not exe