Adds feature to set process priority for Icinga for Windows to BelowNormal for improved Host performance

Author: LordHepipud

Diff for: doc/100-General/10-Changelog.md

@@ -18,6 +18,8 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 
 ### Enhancements
 
+* [#756](https://github.com/Icinga/icinga-powershell-framework/pull/756) Adds feature to set process priority for Icinga for Windows to BelowNormal for improved Host performance
+
 ## 1.13.0 Beta-1 (2024-08-30)
 
 [Issues and PRs](https://github.com/Icinga/icinga-powershell-framework/milestone/32)

Diff for: jobs/SetProcessPriority.ps1

@@ -0,0 +1,22 @@
+# Load the basic framework data
+Use-Icinga -Minimal;
+
+# Wait 10 seconds before procedding
+Start-Sleep -Seconds 10;
+
+# Fetch the process information for JEA and the Icinga for Windows PID
+$JeaProcess = Get-Process -Id (Get-IcingaJEAServicePid) -ErrorAction SilentlyContinue;
+$IfWProcess = Get-Process -Id (Get-IcingaForWindowsServicePid) -ErrorAction SilentlyContinue;
+
+# Set the JEA pid to below normal
+if ($null -ne $JeaProcess -And $JeaProcess.ProcessName -eq 'wsmprovhost') {
+    $JeaProcess.PriorityClass = 'BelowNormal';
+}
+
+# Set the Icinga for Windows pid to below normal
+if ($null -ne $IfWProcess -And $IfWProcess.ProcessName -eq 'powershell') {
+    $IfWProcess.PriorityClass = 'BelowNormal';
+}
+
+# Exit with okay
+exit 0;

Diff for: lib/core/framework/Invoke-IcingaForWindowsMigration.psm1

@@ -151,7 +151,18 @@ function Invoke-IcingaForWindowsMigration()
         Start-IcingaWindowsScheduledTaskRenewCertificate;
         # Ensure the Icinga Agent is not spamming the Application log by default
         Write-IcingaAgentEventLogConfig -Severity 'warning';
+        # Set our newly added process update task
+        Register-IcingaWindowsScheduledTaskProcessPriority -Force;
 
         Set-IcingaForWindowsMigration -MigrationVersion (New-IcingaVersionObject -Version '1.13.0');
     }
+
+    if (Test-IcingaForWindowsMigration -MigrationVersion (New-IcingaVersionObject -Version '1.13.0.1')) {
+        Write-IcingaConsoleNotice 'Applying pending migrations required for Icinga for Windows v1.13.0.1';
+
+        # Set our newly added process update task
+        Register-IcingaWindowsScheduledTaskProcessPriority -Force;
+
+        Set-IcingaForWindowsMigration -MigrationVersion (New-IcingaVersionObject -Version '1.13.0.1');
+    }
 }

Diff for: lib/core/windows/Restart-IcingaWindowsService.psm1

@@ -9,6 +9,8 @@ function Restart-IcingaForWindows()
     }
 
     Restart-IcingaService -Service 'icingapowershell';
+    # Update the process priority after each restart
+    Start-IcingaWindowsScheduledTaskProcessPriority;
 }
 
 Set-Alias -Name 'Restart-IcingaWindowsService' -Value 'Restart-IcingaForWindows';

Diff for: lib/core/wintasks/daemon/Register-TaskIcingaForWindowsProcessPriority.psm1

@@ -0,0 +1,25 @@
+function Register-IcingaWindowsScheduledTaskProcessPriority()
+{
+    param (
+        [switch]$Force = $FALSE
+    );
+
+    [string]$TaskName = 'Set Process Priority';
+    [string]$TaskPath = '\Icinga\Icinga for Windows\';
+
+    $SetProcessPriorityTask = Get-ScheduledTask -TaskName $TaskName -TaskPath $TaskPath -ErrorAction SilentlyContinue;
+
+    if ($null -ne $SetProcessPriorityTask -And $Force -eq $FALSE) {
+        Write-IcingaConsoleWarning -Message 'The {0} task is already present. User -Force to enforce the re-creation' -Objects $TaskName;
+        return;
+    }
+
+    $ScriptPath    = Join-Path -Path (Get-IcingaFrameworkRootPath) -ChildPath '\jobs\SetProcessPriority.ps1';
+    $TaskAction    = New-ScheduledTaskAction -Execute 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe' -Argument ([string]::Format("-WindowStyle Hidden -Command &{{ & '{0}' }}", $ScriptPath));
+    $TaskPrincipal = New-ScheduledTaskPrincipal -UserId 'S-1-5-18' -RunLevel 'Highest' -LogonType ServiceAccount;
+    $TaskSettings  = New-ScheduledTaskSettingsSet -DontStopIfGoingOnBatteries -AllowStartIfOnBatteries -StartWhenAvailable;
+
+    Register-ScheduledTask -TaskName $TaskName -TaskPath $TaskPath -Force -Principal $TaskPrincipal -Action $TaskAction -Settings $TaskSettings | Out-Null;
+
+    Write-IcingaConsoleNotice -Message 'The task "{0}" has been successfully registered at location "{1}".' -Objects $TaskName, $TaskPath;
+}

Diff for: lib/core/wintasks/daemon/Start-TaskSetProcessPriority.psm1

@@ -0,0 +1,14 @@
+function Start-IcingaWindowsScheduledTaskProcessPriority()
+{
+    [string]$TaskName = 'Set Process Priority';
+    [string]$TaskPath = '\Icinga\Icinga for Windows\';
+
+    $SetProcessPriorityTask = Get-ScheduledTask -TaskName $TaskName -TaskPath $TaskPath -ErrorAction SilentlyContinue;
+
+    if ($null -eq $SetProcessPriorityTask) {
+        Write-IcingaConsoleNotice -Message 'The "{0}" task is not present on this system.' -Objects $TaskName;
+        return;
+    }
+
+    Start-ScheduledTask -TaskName $TaskName -TaskPath $TaskPath;
+}