add Final Infrastructure Setup

infrastructure/ansible/roles/blackhole/tasks/main.yml

@@ -0,0 +1,29 @@
+- name: Kopiere Blackhole Script
+  template:
+    src: blackhole.sh.j2
+    dest: /usr/local/bin/blackhole.sh
+    mode: "0755"
+
+- name: Deploye Systemd Service für Blackhole
+  copy:
+    dest: /etc/systemd/system/blackhole.service
+    content: |
+      [Unit]
+      Description=Thesis Blackhole Service (Cleanup)
+      After=network.target
+
+      [Service]
+      Type=simple
+      ExecStart=/usr/local/bin/blackhole.sh
+      Restart=always
+      User=root
+
+      [Install]
+      WantedBy=multi-user.target
+
+- name: Starte Blackhole Service
+  systemd:
+    name: blackhole
+    state: started
+    enabled: yes
+    daemon_reload: yes

infrastructure/ansible/roles/blackhole/templates/blackhole.sh.j2

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+#!/bin/bash
+
+TARGET_DIR="/local_testdata/test-destination"
+
+THRESHOLD=60
+TARGET_USAGE=50
+
+SLEEP_INTERVAL=2
+DELETE_BATCH=200
+SAFE_MINUTES=5
+
+echo "[$(date)] Blackhole Monitor gestartet für $TARGET_DIR"
+
+while true; do
+
+    CURRENT_USAGE=$(df -P "$TARGET_DIR" | awk 'NR==2 {print $5}' | tr -d '%')
+
+    if (( CURRENT_USAGE > THRESHOLD )); then
+        echo "[$(date)] Disk usage ${CURRENT_USAGE}% -> starte Cleanup"
+
+        while (( CURRENT_USAGE > TARGET_USAGE )); do
+
+            find "$TARGET_DIR" \
+                -type f \
+                -mmin +$SAFE_MINUTES \
+                -print0 \
+            | head -z -n $DELETE_BATCH \
+            | xargs -0 -r rm -f
+
+            CURRENT_USAGE=$(df -P "$TARGET_DIR" | awk 'NR==2 {print $5}' | tr -d '%')
+
+            echo "[$(date)] aktuelle Auslastung: ${CURRENT_USAGE}%"
+
+            if ! find "$TARGET_DIR" -type f -mmin +$SAFE_MINUTES | head -n 1 | grep -q .; then
+                echo "[$(date)] Keine alten Dateien mehr zum Löschen"
+                break
+            fi
+
+        done
+
+        echo "[$(date)] Cleanup beendet"
+    fi
+
+    sleep "$SLEEP_INTERVAL"
+done