simple server administration with server infos stored in json

ServerTools.psm1

@@ -0,0 +1,82 @@
+function Get-ServerConfig {
+    param(
+        [string]$Path = ".\servers.json"
+    )
+
+    if (-not (Test-Path $Path)) {
+        throw "Config-Datei nicht gefunden: $Path"
+    }
+
+    return Get-Content $Path -Raw | ConvertFrom-Json
+}
+
+function Get-ServerGroup {
+    param(
+        [Parameter(Mandatory)]
+        [string]$Name
+    )
+
+    $config = Get-ServerConfig
+
+    if (-not $config.groups.$Name) {
+        throw "Gruppe '$Name' existiert nicht"
+    }
+
+    return $config.groups.$Name
+}
+
+function Invoke-ServerCommand {
+    param(
+        [Parameter(Mandatory)]
+        [string]$Group,
+
+        [Parameter(Mandatory)]
+        [scriptblock]$ScriptBlock
+    )
+
+    $servers = Get-ServerGroup -Name $Group
+
+    foreach ($server in $servers) {
+        $name = $server.name
+
+        Write-Host "[$name] Starte..." -ForegroundColor Cyan
+
+        try {
+            Invoke-Command -ComputerName $name -ScriptBlock $ScriptBlock -ErrorAction Stop
+        }
+        catch {
+            Write-Warning "[$name] Fehler: $_"
+        }
+    }
+}
+
+function Invoke-ServerCommandParallel {
+    param(
+        [string]$Group,
+        [scriptblock]$ScriptBlock
+    )
+
+    $servers = Get-ServerGroup -Name $Group
+
+    $servers | ForEach-Object -Parallel {
+        $name = $_.name
+
+        try {
+            Invoke-Command -ComputerName $name -ScriptBlock $using:ScriptBlock
+        }
+        catch {
+            Write-Host "[$name] Fehler: $_"
+        }
+    }
+}
+
+Register-ArgumentCompleter -CommandName Get-ServerGroup, Invoke-ServerCommand -ParameterName Group -ScriptBlock {
+    param($commandName, $parameterName, $wordToComplete)
+
+    $config = Get-ServerConfig
+    $config.groups.PSObject.Properties.Name |
+        Where-Object { $_ -like "$wordToComplete*" } |
+        ForEach-Object {
+            [System.Management.Automation.CompletionResult]::new($_, $_, 'ParameterValue', $_)
+        }
+}