From e7b2f7edd9c08dff9226cfa3c2ba7d66b883d050 Mon Sep 17 00:00:00 2001
From: Raphael Dannecker <raphael.dannecker@steinbeisschule-reutlingen.de>
Date: Thu, 27 Nov 2025 17:02:12 +0100
Subject: [PATCH] Provide a skript to delete VM disks in /lmn/vm

---
 roles/lmn_vm/files/lmn-vm    |  5 ++++
 roles/lmn_vm/files/vm-delete | 45 ++++++++++++++++++++++++++++++++++++
 roles/lmn_vm/tasks/main.yml  |  1 +
 3 files changed, 51 insertions(+)
 create mode 100755 roles/lmn_vm/files/vm-delete

diff --git a/roles/lmn_vm/files/lmn-vm b/roles/lmn_vm/files/lmn-vm
index 7d4011e..006b84c 100644
--- a/roles/lmn_vm/files/lmn-vm
+++ b/roles/lmn_vm/files/lmn-vm
@@ -3,6 +3,11 @@
 %role-student ALL=(lmnsynci) NOPASSWD: /usr/local/bin/vm-sync
 %examusers ALL=(lmnsynci) NOPASSWD: /usr/local/bin/vm-sync
 
+# vm-delete: Delete VM-Images
+%role-teacher ALL=(lmnsynci) NOPASSWD: /usr/local/bin/vm-delete
+%role-student ALL=(lmnsynci) NOPASSWD: /usr/local/bin/vm-delete
+%examusers ALL=(lmnsynci) NOPASSWD: /usr/local/bin/vm-delete
+
 # vm-aria2: Start/Stop aria2 as systemd-service for VM-Images
 lmnsynci ALL=(root) NOPASSWD: /usr/local/bin/vm-aria2
 
diff --git a/roles/lmn_vm/files/vm-delete b/roles/lmn_vm/files/vm-delete
new file mode 100755
index 0000000..84a8aba
--- /dev/null
+++ b/roles/lmn_vm/files/vm-delete
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -eu
+
+directory="/lmn/vm"
+
+if [ ! -d "$directory" ]; then
+  echo "No VM directory found."
+  exit 1
+fi
+
+qcow2_files=("$directory"/*.qcow2)
+
+if [ "${#qcow2_files[@]}" -eq 0 ]; then
+  echo "Keine QCOW2-Dateien gefunden."
+  exit 0
+fi
+
+echo "Gefundene QCOW2-Dateien:"
+echo "-------------------------------------------------------------"
+printf "%-50s %10s\n" "Datei" "Größe (MB)"
+echo "-------------------------------------------------------------"
+
+for file in "${qcow2_files[@]}"; do
+  size=$(du -m "$file" | cut -f1) # Größe in MB
+  printf "%-50s %10d\n" "$file" "$size"
+done
+
+echo "-------------------------------------------------------------"
+
+for file in "${qcow2_files[@]}"; do
+  read -rp "Möchtest du die Datei $file löschen? (j/n) " confirmation
+  if [[ "$confirmation" == "j" || "$confirmation" == "J" ]]; then
+    link_count=$(stat -c %h "$file")
+    rm "$file"
+    echo "$file wurde gelöscht."
+    if [ "$link_count" -gt 1 ]; then
+      echo "Achtung: $file hat noch $((link_count - 1)) weitere Hardlinks."
+      echo "Diese liegen evtl. unter:"
+      echo "- /var/tmp/${UID}/vm/ (temporäre VMs, werden automatisch beim Neustart gelöscht)"
+      echo "- /var/vm/${UID}/ (persistente VMs)"
+    fi
+    echo
+  fi
+done
diff --git a/roles/lmn_vm/tasks/main.yml b/roles/lmn_vm/tasks/main.yml
index 44c83a6..e2c312b 100644
--- a/roles/lmn_vm/tasks/main.yml
+++ b/roles/lmn_vm/tasks/main.yml
@@ -118,6 +118,7 @@
     group: root
     mode: '0755'
   loop:
+    - vm-delete
     - vm-create
     - vm-rebase
     - vm-run