Improves Agent installation/uninstallation stability

Fixes #69

CHANGELOG.md

@@ -31,6 +31,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 * [#67](https://github.com/Icinga/icinga-powershell-framework/issues/67) Adds support to flush entire Icinga 2 ProgamData directory on uninstallation
 * [#68](https://github.com/Icinga/icinga-powershell-framework/issues/68) Improves the setup wizard by providing better understandable prompts including examples and various smaller bugfixes
 * Console prints are now containing a severity message to better keep an eye on possible warnings/errors
+* [#69](https://github.com/Icinga/icinga-powershell-framework/issues/69) Improves stability of installation/uninstallation of the Agent by using different PowerShell instances for service and installation/uninstallation handling
 
 ### Bugfixes
 

lib/core/framework/Restart-IcingaService.psm1

@@ -24,9 +24,14 @@ function Restart-IcingaService()
         $Service
     );
 
-    if (Get-Service $Service -ErrorAction SilentlyContinue) {
+    if (Get-Service "$Service" -ErrorAction SilentlyContinue) {
         Write-IcingaConsoleNotice ([string]::Format('Restarting service "{0}"', $Service));
-        Restart-Service $Service;
+        powershell.exe -Command {
+            $Service = $args[0]
+
+            Restart-Service "$Service";
+        } -Args $Service;
+        
     } else {
         Write-IcingaConsoleWarning -Message 'The service "{0}" is not installed' -Objects $Service;
     }

lib/core/framework/Start-IcingaService.psm1

@@ -26,7 +26,11 @@ function Start-IcingaService()
 
     if (Get-Service $Service -ErrorAction SilentlyContinue) {
         Write-IcingaConsoleNotice -Message 'Starting service "{0}"' -Objects $Service;
-        Start-Service $Service;
+        powershell.exe -Command {
+            $Service = $args[0]
+
+            Start-Service "$Service";
+        } -Args $Service;
     } else {
         Write-IcingaConsoleWarning -Message 'The service "{0}" is not installed' -Objects $Service;
     }

lib/core/framework/Stop-IcingaService.psm1

@@ -26,7 +26,11 @@ function Stop-IcingaService()
 
     if (Get-Service $Service -ErrorAction SilentlyContinue) {
         Write-IcingaConsoleNotice -Message 'Stopping service "{0}"' -Objects $Service;
-        Stop-Service $Service;
+        powershell.exe -Command {
+            $Service = $args[0]
+
+            Stop-Service "$Service";
+        } -Args $Service;
     } else {
         Write-IcingaConsoleWarning -Message 'The service "{0}" is not installed' -Objects $Service;
     }

lib/core/icingaagent/installer/Install-IcingaAgent.psm1

@@ -71,7 +71,15 @@ function Install-IcingaAgent()
         }
     }
 
-    $InstallProcess = Start-IcingaProcess -Executable 'MsiExec.exe' -Arguments ([string]::Format('/quiet /i "{0}" {1}', $IcingaInstaller.InstallerPath, $InstallTarget)) -FlushNewLines;
+    $InstallProcess = powershell.exe -Command {
+        $IcingaInstaller = $args[0];
+        $InstallTarget   = $args[1];
+        Use-Icinga;
+
+        $InstallProcess = Start-IcingaProcess -Executable 'MsiExec.exe' -Arguments ([string]::Format('/quiet /i "{0}" {1}', $IcingaInstaller.InstallerPath, $InstallTarget)) -FlushNewLines;
+
+        return $InstallProcess;
+    } -Args $IcingaInstaller, $InstallTarget;
 
     if ($InstallProcess.ExitCode -ne 0) {
         Write-IcingaConsoleError -Message 'Failed to install Icinga 2 Agent: {0}{1}' -Objects $InstallProcess.Message, $InstallProcess.Error;

lib/core/icingaagent/installer/Uninstall-IcingaAgent.psm1

@@ -4,18 +4,32 @@ function Uninstall-IcingaAgent()
         [switch]$RemoveDataFolder = $FALSE
     );
 
-    $IcingaData = Get-IcingaAgentInstallation;
+    $IcingaData                = Get-IcingaAgentInstallation;
+    [string]$IcingaProgramData = Join-Path -Path $Env:ProgramData -ChildPath 'icinga2';
 
     if ($IcingaData.Installed -eq $FALSE) {
-        Write-IcingaConsoleError 'Unable to uninstall the Icinga Agent. The Agent is not installed';
+        Write-IcingaConsoleNotice 'Unable to uninstall the Icinga Agent. The Agent is not installed';
-        return;
+        if ($RemoveDataFolder) {
+            if (Test-Path $IcingaProgramData) {
+                Write-IcingaConsoleNotice -Message 'Removing Icinga Agent directory: "{0}"' -Objects $IcingaProgramData;
+                return ((Remove-ItemSecure -Path $IcingaProgramData -Recurse -Force) -eq $FALSE);
+            } else {
+                Write-IcingaConsoleNotice -Message 'Icinga Agent directory "{0}" does not exist' -Objects $IcingaProgramData;
+            }
+        }
+        return $FALSE;
     }
 
-    Write-IcingaConsoleNotice 'Removing current Icinga Agent';
+    $Uninstaller = powershell.exe -Command {
+        $IcingaData = $args[0]
+        Use-Icinga;
 
-    Stop-IcingaService 'icinga2';
+        Stop-Service 'icinga2' -ErrorAction SilentlyContinue | Out-Null;
 
-    $Uninstaller = Start-IcingaProcess -Executable 'MsiExec.exe' -Arguments ([string]::Format('{0} /q', $IcingaData.Uninstaller)) -FlushNewLine;
+        $Uninstaller = Start-IcingaProcess -Executable 'MsiExec.exe' -Arguments ([string]::Format('{0} /q', $IcingaData.Uninstaller)) -FlushNewLine;
+
+        return $Uninstaller;
+    } -Args $IcingaData;
 
     if ($Uninstaller.ExitCode -ne 0) {
         Write-IcingaConsoleError ([string]::Format('Failed to remove Icinga Agent: {0}{1}', $Uninstaller.Message, $Uninstaller.Error));
@@ -23,7 +37,6 @@ function Uninstall-IcingaAgent()
     }
 
     if ($RemoveDataFolder) {
-        [string]$IcingaProgramData = Join-Path -Path $Env:ProgramData -ChildPath 'icinga2';
         Write-IcingaConsoleNotice -Message 'Removing Icinga Agent directory: "{0}"' -Objects $IcingaProgramData;
         if ((Remove-ItemSecure -Path $IcingaProgramData -Recurse -Force) -eq $FALSE) {
             return $FALSE;